Relevant bibliographies by topics / BZT

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Academic literature on the topic 'BZT'

Author: Grafiati
Published: 4 June 2021
Last updated: 1 February 2022

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Journal articles on the topic "BZT"

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Ma, Cai Bing, Xin Gui Tang, De Ping Xiong, Yan Ping Jiang, and Qiu Xiang Liu. "Ferroelectric and Optical Properties of BST/BZT/BST Sandwich Structure Thin Films Prepared by RF Sputtering." Applied Mechanics and Materials 164 (April 2012): 47–51. http://dx.doi.org/10.4028/www.scientific.net/amm.164.47.

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In this work, (Ba0.65Sr0.35)TiO3 (BST) and Ba(Zr0.20Ti0.80)O3 (BZT) ceramic targets were prepared using the traditional solid-state reaction technique, which were sintered at 1200 °C for 2 h. The thin films of BST, BZT and sandwich structure BST/BZT/BST were grown on Pt/Ti/SiO2/Si(100) and Si(100) substrates by rf-sputtering at 500 °C, respectively. And all samples crystallied at temperatures 650 °C for 30 min in oxygen atmosphere. The cross-sectional images of the thin films were characterized by scanning electron microscope (SEM). The dielectric constant and dissipation factor tan of the BZT, BST and BST/BZT/BST thin films are 680 and 0.030, 240 and 0.021, 85 and 0.018, respectively at 100 kHz. Compared with BST and BZT films, the BST/BZT/BST film has lower dielectric constant and lower dissipation. The remanent polarization (Pr) of the sandwich structure BST/BZT/BST thin film is up to 9.57 μC/cm2, the Pr value is larger than that BST (0.25μC/cm2) film and BZT (8.45μC/cm2) film. The optical properties (refractive index n and extinction coefficient k) of the BST/BZT/BST film on Si(100) substrate were measured by n & k analyzer 2000.
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QIN, W. F., J. ZHU, J. XIONG, J. L. TANG, W. J. JIE, Y. ZHANG, and Y. R. LI. "DIELECTRIC CHARACTERISTICS OF BST/BZT/BST MULTILAYER." Surface Review and Letters 15, no. 01n02 (February 2008): 195–200. http://dx.doi.org/10.1142/s0218625x08011238.

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Ba 0.6 Sr 0.4 TiO 3 (BST) and Ba 0.6 Sr 0.4 TiO 3/ Ba ( Zr 0.2 Ti 0.8) O 3/ Ba 0.6 Sr 0.4 TiO 3 (BST/BZT/BST) multilayer (ML) films were prepared by pulsed laser deposition on the LaNiO 3-coated LaAlO 3 substrate. X-ray diffraction analysis revealed that the two kinds of films could be epitaxially grown in pure single-oriented perovskite phases and atomic force microscopy showed that the grain size of ML films was similar to BST films in size. The dielectric properties of the BST and ML thin films were measured at 10 kHz and 300 K with a parallel-plate capacitor configuration. The results revealed that the dielectric tunability for ML films slightly decreased, while the loss decreased synchronously. The figure-of-merit factor value increases from 17.32 for BST films to 42.14 for ML films under an applied electric field of 300 kV/cm. The leakage current density of the BST thin films at a positive bias field of 300 kV/cm decreases from 3.76 × 10-6 to 1.25 × 10-7 A/cm2 for ML films. This work clearly reveals the highly promising potential of BST/BZT/BST multilayer films compared with BST films for application in tunable microwave devices.
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QIN, Wen-Feng, Jie XIONG, and Yan-Rong LI. "Structure and Properties of BST/BZT/BST Multilayer Film." Journal of Inorganic Materials 25, no. 3 (March 30, 2010): 247–50. http://dx.doi.org/10.3724/sp.j.1077.2010.00247.

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Zhang, Cheng, Qi Bin Liu, and Xiao Qin Huang. "Effect of Sintering Temperature on Microstructure and Electrical Properties of (Mn, Nb)-Doped BZT-BCT Ceramics." Advanced Materials Research 820 (September 2013): 59–62. http://dx.doi.org/10.4028/www.scientific.net/amr.820.59.

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To obtain lead-free 0.5Ba (Zr0.2Ti0.8)O3-0.5(Ba0.7Ca0.3)TiO3 ceramics with excellent microstructure and electrical properties, BZT-BCT ceramics doping Mn4+ and Nb5+ was synthesized follow a conventional solid state reaction route. By means of SEM, XRD, quasi-static d33 meter, the influence of sintering temperature on microstructure, piezoelectric and dielectric properties of BZT-BCT-Mn-Nb ceramics was discussed. The results show that grain size and the dielectric loss of BZT-BCT-Mn-Nb ceramics increase as raising the sintering temperature. When BZT-BCT-Mn-Nb ceramics is sintered at 1380°C, the optimum piezoelectric coefficient and dielectric constant are 264pC/N and 4142, respectively.
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Di Loreto, A., A. Frattini, S. Barolin, and O. de Sanctis. "CARACTERIZATION OF BZT POWDERS PREPARED BY MECANOCHEMICAL ACTIVATION." Anales AFA 21, no. 1 (September 1, 2010): 205–8. http://dx.doi.org/10.31527/analesafa.2010.21.205.

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Dang, Anh Tuan, Thanh Tung Vo, Van Chuong Truong, and Van Hong Le. "Influence of sintering temperature on structure, microstructure and piezoelectric properties of doped BZT–BCT ceramics." International Journal of Modern Physics B 31, no. 02 (January 18, 2017): 1650258. http://dx.doi.org/10.1142/s0217979216502581.

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This work reports the influence of sintering temperature on structure, microstructure and piezoelectric properties of 0.48 Ba(Zr[Formula: see text]Ti[Formula: see text])O3–0.52 (Ba[Formula: see text]Ca[Formula: see text])TiO3(BZT–BCT) doped with ZnO nanoparticle ceramics manufactured by a conventional solid state reaction method. By increasing sintering temperature, the piezoelectric behaviors were improved and rose up to the best parameters at a sintering temperature of 1450[Formula: see text]C ([Formula: see text] pC/N and [Formula: see text]). The corresponding properties of undoped BZT–BCT ceramics were investigated as a comparison. The received results show that the sintering behavior and piezo-parameters of doped BZT–BCT samples are better than the undoped BZT–BCT samples at each sintering temperature.
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Patel, Satyanarayan, and Harekrishna Yadav. "Electrical conduction properties of the BZT–BST ceramics." Journal of Advanced Dielectrics 10, no. 06 (December 2020): 2050026. http://dx.doi.org/10.1142/s2010135x20500265.

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0.5Ba([Formula: see text][Formula: see text]O3-0.5([Formula: see text][Formula: see text]TiO3 (BZT–BST) has been explored in recent times for potential applications in energy harvesting, electrocaloric and energy storage. To this end, energy harvesting/conversion and storage applications require an understanding of the conduction and loss mechanisms. The conduction mechanism in BZT–BST ceramics is studied using impedance spectroscopy (IS) at 0.1 Hz−3 MHz and 100−600[Formula: see text]C. Impedance study reveals the presence of two types of relaxation processes due to grain and grain boundary contributions. The relaxation time and dc conductivity activation energies are obtained as 1.12/1.3 eV and 1.05/1.2eV for bulk/grain boundary, respectively, and found that oxygen vacancies dominated electrical behavior. The relaxation mechanism follows non-Debye-type behavior. The high resistance of the grain (bulk) in the ferroelectric region does not contribute to the high losses; the losses probably result from the phase transition. Also, BZT–BST ceramics exhibit a negative temperature coefficient of resistance (NTCR) behaviour. From a practical application point of view in the temperature regime of 25–65[Formula: see text]C, the loss’s contribution is low. The significant contributions of loss result from the response of phase-transition in this temperature range (25–65[Formula: see text]C).
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Kulkarni, S. B., S. S. Veer, D. J. Salunkhe, S. R. Kokare, and P. B. Joshi. "Structural and Dielectric Investigations on Bst-Bzt Composites." Material Science Research India 5, no. 1 (June 25, 2008): 183–86. http://dx.doi.org/10.13005/msri/050129.

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Puli, Venkata Sreenivas, Dhiren K. Pradhan, Brian C. Riggs, Shiva Adireddy, Ram S. Katiyar, and Douglas B. Chrisey. "Synthesis and characterization of lead-free ternary component BST–BCT–BZT ceramic capacitors." Journal of Advanced Dielectrics 04, no. 02 (April 2014): 1450014. http://dx.doi.org/10.1142/s2010135x14500143.

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Polycrystalline sample of lead-free 1/3( Ba 0.70 Sr 0.30 TiO 3) + 1/3( Ba 0.70 Ca 0.30 TiO 3) + 1/3( BaZr 0.20 Ti 0.80 O 3)( BST - BCT - BZT ) ceramic was synthesized by solid state reaction method. Phase purity and crystal structure of as-synthesized materials was confirmed by X-ray diffraction (XRD). Temperature-dependent dielectric permittivity studies demonstrated frequency-independent behavior, indicating that the studied sample has typical diffuse phase transition behavior with partial thermal hysteresis. A ferroelectric phase transition between cubic and tetragonal phase was noticed near room temperature (~ 330 K). Bulk P–E hysteresis loop showed a saturation polarization of 20.4 μC/cm2 and a coercive field of ~ 12.78 kV/cm at a maximum electric field of ~ 115 kV/cm. High dielectric constant (ε ~ 5773), low dielectric loss (tan δ ~ 0.03) were recorded at room temperature. Discharge energy density of 0.44 J/cm3 and charge energy density of 1.40 J/cm3 were calculated from nonlinear ferroelectric hysteresis loop at maximum electric field. Dielectric constant at variable temperatures and electric fields, ferroelectric to paraelectric phase transition and energy storage properties were thoroughly discussed.
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Khien, Nguyen Van. "EFFECT OF Ca CONCENTRATION SUBSTITUTING FOR Ba ON STRUCTURE AND FERROELECTRIC PROPERTIES OF BZT-BCT MATERIAL." Vietnam Journal of Science and Technology 56, no. 1A (May 4, 2018): 86. http://dx.doi.org/10.15625/2525-2518/56/1a/12508.

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In this paper, we report the effect of Ca substitution on the structure and ferroelectric properties of BaZr0.2Ti0.8O3-Ba1-xCaxTiO3 (BZT-BCT). The BZT-BCT samples were synthesized by solid state reaction method. The X-ray results indicate that a phase structure competition appears in the Ca-substituted samples. Based on the hysteresis loops measured by Sawyer – Towermethod, we calculated the Ec and Pr values with the extreme value reaching 29.6 %. The ferroelectric properties of BZT-BCT materialstrongly depend on Ca concentration. The results may be related to a pinning effect concerning with the phase-structured competition in the material.
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Dissertations / Theses on the topic "BZT"

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Celtikci, Baris. "Preparation Of Lead-free Bzt-bct Thin Films By Chemical Solution Deposition And Their Characterization." Master's thesis, METU, 2012. http://etd.lib.metu.edu.tr/upload/12614623/index.pdf.

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In the presented thesis, lead-free Ba(Ti0.8Zr0.2)O3-(Ba0.7Ca0.3)TiO3 (BZT-BCT) thin films were deposited on Pt/TiO2/SiO2/Si substrates using chemical solution deposition method and then the effect of process parameters were investigated to obtain optimum parameters of these lead-free thin films. The phase was selected near to the morphotropic phase boundary (MPH) to increase the number of polarization directions where rhombohedral and tetragonal phases exist together. In this study, the effect of sintering temperatures on microstructure, dielectric and ferroelectric properties were studied systematically. Among the various high-quality BZT-BCT thin films with uniform thickness, the optimum dielectric and ferroelectric responses were observed for films annealed at 800 oC for 1 h sintering time. The thickness was kept constant for all measurements as 500 nm (triple layered films). Therefore, the average grain sizes were found around 60 nm for samples sintered at 700,750 and 800 oC. BZT-BCT thin films sintered at 800 oC showed effective remnant polarization and coercive field values of 2.9 µ
C/cm2 and 49.4 kV/cm, together with a high dielectric constant and low loss tangent of 365.6 and 3.52 %, respectively, at a frequency of 600 kHz due to pure perovskite phase showing full crystallization and minimum surface porosity obtained at this temperature.
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Aoujgal, Ahmed. "Etude des propriétés physico-chimiques et électroniques de matériaux ferroélectriques sous forme de céramiques et de films minces en vue d'applications radiofréquences et microondes." Littoral, 2010. http://www.theses.fr/2010DUNK0285.

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L’objectif du présent travail est de concevoir, réaliser et optimiser des matériaux accordables pour des applications en électronique à hautes fréquences. Le composant le plus simple permettant de mettre à profit cette étude est le condensateur accordable avec une tension continue qui peut être ensuite intégrée dans des dispositifs microondes accordables ou reconfigurables. Le condensteur peut être en couches minces ou en céramique. Pour réaliser de tels composants, on doit utiliser des matériaux présentant de faible pertes diélectriques, une permitivité élevée, une accordabilité importante et une bonne stabilité de la fréquence de résonance avec la température. Pour cela, nous avons mené une étude sur des matériaux ferroélectriques classiques et relaxeurs afin, d’une part d’optimiser les conditions de synthèse, et d’autre part d’améliorer leurs propriétés électriques pour des applications radiofréquences et microondes. Nous avons étudié des matériaux ferroélectriques de phase pérovskite. Il s’agit du titane de baryum et de strontium (BST) qui est un ferroélectrique classique, du titane de baryum et de zircone (BZT) qui selon sa composition peut être classique ou relaxeur et des dérivées du BZT obtenues par substitution au niveau des sites pérovskites a et b respectivement par du bismuth et par du zinc-niobium. Nous avons aussi synthétisé et caractérisé des matériaux de phase pyrochlore de formule Bi1. 5ZnNb1. 5O7. Ces études vont de l’élaboration de tous ces matériaux sous forme de céramiques et de couches minces, suivies de caractérisations physico-chimiques, structurales, diélectriques et ferroélectriques dans une large gamme de fréquences et de températures
The main objective of this work is to design, implement and optimize tunable materials for electronic applications at high frequencies. The easiest component to build on this study is the tunable capacitor with a voltage which can then be integrated into microwave devices such as tunable or reconfigurable resonators, filters, antennas. . . Etc. The capacitor can be either thin film or ceramic-based. To produce such components we must use materials which must have low dielectric loss, high dielectric permittivity, high tunability and stability of the resonant frequency of the capacitor with the temperature. For this, we conducted a detailed study of classical and relaxor ferroelectric materials in order, firstly to optimize the synthesis conditions, and secondly to improve their electrical properties for radiofrequencies and microwave applications. We have studied ferroelectric materials with perovskite phase, namely barium titanate strontium (BST) which is a classical ferroelectric and barium zirconium (BZT) which according to its composition can be a classical ferroelectric or relaxor ferroelectric and the derivatives of BaZr0. 1Ti0. 9O3 obtained by substituting bismuth and zinc-niobium respectively at A and B sites of the perovskite phase. We also synthesized and characterized the pyrochlore phase materials of bismuth zinc niobate, with composition of Bi1. 5ZnNb1. 5O7. The studies we have done range from the development of these materials in the form of ceramics and thin films, followed by characterizations to determine their physico-chemical properties, structural dielectric and ferroelectric in a range wide of frequencies and temperature
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Sciacovelli, Luca. "Simulation numérique d'écoulements turbulents de gaz dense." Thesis, Paris, ENSAM, 2016. http://www.theses.fr/2016ENAM0061/document.

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Les écoulements turbulents de gaz denses, qui sont d’un grand intérêt pour un large éventail d'applications, sont le siège de phénomènes physiques encore peu connus et difficiles à étudier par des approches expérimentale. Dans ce travail, nous étudions pour la première fois l’influence des effets de gaz denses sur la structure de la turbulence compressible à l’aide de simulations numériques. Le fluide considéré est le PP11, un fluorocarbure lourd, dont le comportement thermodynamique a été représenté à l’aide de différentes lois d’état, afin de quantifier la sensibilité des solutions aux choix de modélisation. Nous avons considéré d’abord la décroissance d’une turbulence homogène isotrope compressible. Les fluctuations de température sont négligeables, alors que celles de la vitesse du son sont importantes à cause de leur forte dépendance de la densité. Le comportement particulier de la vitesse du son modifie de manière significative la structure de la turbulence, conduisant à la formation de shocklets de détente. L’analyse de la contribution des différentes structures à la dissipation d’énergie et à la génération d’enstrophie montre que, pour un gaz dense, les régions de forte dilatation jouent un rôle similaire à celles de forte compression, contrairement aux gaz parfaits, dans lesquels le comportement est fortement dissymétrique. Ensuite, nous avons mené des simulations numériques pour une configuration de canal plan en régime supersonique, pour plusieurs valeurs des nombres de Mach et de Reynolds. Les résultats confirment la validité de l’hypothèse de Morkovin. L’introduction d’une loi d’échelle semi-locale prenant en compte le variations de densité et viscosité, permet de comparer les profils des grandeurs turbulentes (contraintes de Reynolds, anisotropie, budgets d’énergie) avec ces observés en gaz parfait. Les variables thermodynamiques, quant à elles, présentent une évolution très différente pour un gaz parfait et pour un gaz dense, la chaleur spécifique élevée de ce dernier conduisant à un découplage des effets dynamiques et thermiques et à un comportement proche de celui d’un fluide incompressible avec des propriétés variables
Dense gas turbulent flows, of great interest for a wide range of engineering applications, exhibit physical phenomena that are still poorly understood and difficult to reproduce experimentally. In this work, we study for the first time the influence of dense gas effects on the structure of compressible turbulence by means of numerical simulations. The fluid considered is PP11, a heavy fluorocarbon, whose thermodynamic behavior is described by means of different equations of state to quantify the sensitivity of solutions to modelling choices. First, we considered the decay of compressible homogeneous isotropic turbulence. Temperature fluctuations are found to be negligible, whereas those of the speed of sound are large because of the strong dependence on density. The peculiar behavior of the speed of sound significantly modifies the structure of the turbulence, leading to the occurrence of expansion shocklets. The analysis of the contribution of the different structures to energy dissipation and enstrophy generation shows that, for a dense gas, high expansion regions play a role similar to high compression ones, unlike perfect gases, in which the observed behaviour is highly asymmetric. Then, we carried out numerical simulations of a supersonic turbulent channel flow for several values of Mach and Reynolds numbers. The results confirm the validity of the Morkovin' hypothesis. The introduction of a semi-local scaling, taking into account density and viscosity variations across the channel, allow to compare the wall-normal profiles of turbulent quantities (Reynolds stresses, anisotropy, energy budgets) with those observed in ideal gases. Nevertheless, the thermodynamic variables exhibit a different evolution between perfect and dense gases, since the high specific heats of the latter lead to a decoupling of dynamic and thermal effects, and to a behavior close to that of variable property incompressible fluids
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Bahmani, Fatemeh. "Three Problems Involving Compressible Flow with Large Bulk Viscosity and Non-Convex Equations of State." Diss., Virginia Tech, 2013. http://hdl.handle.net/10919/25885.

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We have examined three problems involving steady flows of Navier-Stokes fluids. In each problem non-classical effects are considered. In the first two problems, we consider fluids which have bulk viscosities which are much larger than their shear viscosities. In the last problem, we examine steady supersonic flows of a Bethe-Zel'dovich-Thompson (BZT) fluid over a thin airfoil or turbine blade. BZT fluids are fluids in which the fundamental derivative of gasdynamics changes sign during an isentropic expansion or compression. In the first problem we consider the effects of large bulk viscosity on the structure of the inviscid approximation using the method of matched asymptotic expansions. When the ratio of bulk to shear viscosity is of the order of the square root of the Reynolds number we find that the bulk viscosity effects are important in the first corrections to the conventional boundary layer and outer inviscid flow. At first order the outer flow is found to be frictional, rotational, and non-isentropic for large bulk viscosity fluids. The pressure is found to have first order variations across the boundary layer and the temperature equation is seen to have two additional source terms at first order when the bulk viscosity is large. In the second problem, we consider the reflection of an oblique shock from a laminar flat plate boundary layer. The flow is taken to be two-dimensional, steady, and the gas model is taken to be a perfect gas with constant Prandtl number. The plate is taken to be adiabatic. The full Navier-Stokes equations are solved using a weighted essentially non-oscillatory (WENO) numerical scheme. We show that shock-induced separation can be suppressed once the bulk viscosity is large enough. In the third problem, we solve a quartic Burgers equation to describe the steady, two-dimensional, inviscid supersonic flow field generated by thin airfoils. The Burgers equation is solved using the WENO technique. Phenomena of interest include the partial and complete disintegration of compression shocks, the formation of expansion shocks, and the collision of expansion and compression shocks.
Ph. D.
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Mendes, Armando Monte. "Estudo da deposi??o de filmes finos de BaTi(1-X)Zr(X)O3 por meio de planejamento Box-Behnken." Universidade Federal do Rio Grande do Norte, 2015. http://repositorio.ufrn.br/handle/123456789/20591.

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Conselho Nacional de Desenvolvimento Cient?fico e Tecnol?gico (CNPq)
Coordena??o de Aperfei?oamento de Pessoal de N?vel Superior (CAPES)
Materiais cer?micos ferroel?tricos com estrutura perovskita (ABO3) s?o largamente utilizados em componentes de mem?ria no estado s?lido (FeRAM?s e DRAM?s) bem como em capacitores de m?ltiplas camadas, especialmente na forma de filmes finos. Quando dopados com ?ons de zirc?nio, materiais ? base de BaTiO3 formam uma solu??o s?lida conhecida como titanato zirconato de b?rio (BaTi1-xZrxO3). Tamb?m chamado de BZT, esse material pode sofrer significativas mudan?as em suas propriedades el?tricas diante de pequenas varia??es do teor de zirc?nio na rede cristalina. O presente trabalho consiste no estudo dos efeitos dos par?metros de deposi??o de filmes finos de BaTi0,75Zr0,25O3 pelo m?todo de spin-coating sobre sua morfologia e propriedades f?sicas, utilizando um planejamento experimental do tipo Box-Behnken. A resina utilizada no processo de deposi??o foi sintetizada pelo m?todo dos precursores polim?ricos (Pechini) e foi subsequentemente dividida em tr?s parcelas cada qual teve sua viscosidade ajustada para 10, 20 e 30 mPa?s por meio de um viscos?metro rotativo. As resinas foram depositadas em substratos de Pt/Ti/SiO2/Si pelo m?todo de spin-coating em 15 diferentes combina??es de viscosidade, velocidade de rota??o (3000, 5500 e 8000 rpm) e n?mero de camadas depositadas (5, 8 e 11 camadas) previstas no planejamento e ent?o calcinadas a 800?C por 1h. A fase cristalina dos filmes foi determinada por difra??o de Raios-X (DRX) e indexada com a carta JCPDS 36-0019. Morfologia da superf?cie e tamanho de gr?o foram observados por meio de microscopia de for?a at?mica (AFM) indicando filmes bem densificados e tamanho m?dio de gr?o em torno de 50nm. Imagens da se??o transversal dos filmes foram obtidas por interm?dio de microscopia eletr?nica de varredura com emiss?o de campo (MEV-FEG), indicando espessuras bem uniformes variando de 140-700 nm entre amostras. Medidas de capacit?ncia foram realizadas ? temperatura ambiente com a ajuda de um analisador de imped?ncia. Os filmes apresentaram valores de constante diel?trica de 49-277 a 100KHz e baixa perda diel?trica. O planejamento indicou efeitos n?o significativos das intera??es entre os par?metros de deposi??o sobre a espessura dos filmes. A metodologia de superf?cies de resposta possibilitou uma melhor observa??o dos efeitos das vari?veis.
Ferroelectric ceramics with perovskite structure (ABO3) are widely used in solid state memories (FeRAM?s and DRAM's) as well as multilayered capacitors, especially as a thin films. When doped with zirconium ions, BaTiO3-based materials form a solid solution known as barium zirconate titanate (BaTi1-xZrxO3). Also called BZT, this material can undergo significant changes in their electrical properties for a small variation of zirconium content in the crystal lattice. The present work is the study of the effects of deposition parameters of BaTi0,75Zr0,25O3 thin films by spin-coating method on their morphology and physical properties, through an experimental design of the Box-Behnken type. The resin used in the process has been synthesized by the polymeric precursor method (Pechini) and subsequently split into three portions each of which has its viscosity adjusted to 10, 20 and 30 mPa?s by means of a rotary viscometer. The resins were then deposited on Pt/Ti/SiO2/Si substrates by spin-coating method on 15 different combinations of viscosity, spin speed (3000, 5500 and 8000 rpm) and the number of deposited layers (5, 8 and 11 layers) and then calcined at 800 ? C for 1 h. The phase composition of the films was analyzed by X-ray diffraction (XRD) and indexed with the JCPDS 36-0019. Surface morphology and grain size were observed by atomic force microscopy (AFM) indicating uniform films and average grain size around 40 nm. Images of the cross section of the films were obtained by scanning electron microscopy field emission (SEM-FEG), indicating very uniform thicknesses ranging from 140-700 nm between samples. Capacitance measurements were performed at room temperature using an impedance analyzer. The films presented dielectric constant values of 55-305 at 100kHz and low dielectric loss. The design indicated no significant interaction effects between the deposition parameters on the thickness of the films. The response surface methodology enabled better observes the simultaneous effect of variables.
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Trelcat, Jean-François. "Synthèses par voies solide et hydrothermale pour céramiques de type BNT - BT - BKT." Valenciennes, 2010. http://ged.univ-valenciennes.fr/nuxeo/site/esupversions/7f649e27-84b6-4215-952b-cd0b3ee186ad.

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Ce travail a pour objet l’étude de l’un des systèmes les plus prometteurs en tant que substitut au PZT, le ternaire Bi0,5Na0,5TiO3 - BaTiO3 - Bi0,5K0,5TiO3. La première partie de la thèse s’est focalisée sur la synthèse par voie solide de ce système et a permis une estimation plus affinée de la zone de transition de phase morphotropique. Dans une seconde partie, nous nous sommes centrés sur l’élaboration de poudres réactives de BNT par voie hydrothermale. Bien que les divers protocoles mis au point ont permis l’obtention de poudres microniques et cristallisées, toutes se distinguent par l’apparition de phases thermiquement instables en quantités infimes mais néanmoins suffisantes pour entraîner l’apparition d’une macroporosité après frittage. Diverses techniques de lavage ont été développées pour éliminer ces phases métastables. Un compromis a dû être réalisé entre la qualité de l’élimination de ces phases non désirées et le maintien de la composition chimique de la phase majoritaire. Le taux de densification et les propriétés piézoélectriques obtenus sur ces céramiques sont largement comparables à la voie solide. L’étude de la cosynthèse BNT - BT par thermolyse hydrothermale de la composition binaire 0,935 BNT - 0,065 BT n’a pu aboutir et a mis en évidence la précipitation préalable et définitive du titanate de bismuth Bi12TiO20
This study focuses on the study of one of the most promising systems as an alternative to PZT, the Bi0,5Na0,5TiO3 - BaTiO3 - Bi0,5K0,5TiO3 ternary system. The first part of the thesis consists on the solid state synthesis of this system and has allowed a more accurate estimation of the morphotropic phase boundary location. In a second part, we focused this study on the development of BNT powders hydrothermal synthesis. Although various protocols have developed the production of fine and single phased powders, all of them are characterized by the presence of thermally unstable phases in minor quantities but nevertheless sufficient to let appear a strong porosity after sintering. Various washing techniques have been developed to eliminate these metastable phases. A compromise between the quality of the metastable phase elimination and the preservation of the major phase chemical composition must be realized. The densification ratio and piezoelectric properties obtained for these ceramics are widely comparable to the solid route synthesized ones. The BNT - BT cosynthesis study of the 0,935 BNT - 0,065 BT binary composition put in evidence the prerequisite and definitive bismuth titanate Bi12TiO20 precipitation
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Delhote, Nicolas. "Composants céramiques 3D par procédé de stéréolithographie : solutions de filtrage hyperfréquence innovantes." Limoges, 2007. https://aurore.unilim.fr/theses/nxfile/default/3703d4dd-1832-49a6-85c5-2a916d7271f2/blobholder:0/2007LIMO4028.pdf.

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Ces travaux de thèse ont porté sur la conception et la réalisation de composants céramiques 3D par procédé de stéréolithographie. Ce procédé permet notamment la fabrication de formes complexes tridimensionnelles à base de matériaux céramiques variés. Ces différents composants apportent des solutions de filtrage innovantes aux solutions actuelles. La première partie de ce manuscrit présente les propriétés des cristaux à bande interdite électromagnétique et différentes structures 1D, 2D et 3D existantes. Différentes méthodes de fabrication de ces structures sont de mêmes étudiées. La seconde partie est dédiée à la conception et à la réalisation de résonateurs diélectriques originaux à base d’Alumine fonctionnant dans la bande de fréquence Ku. Le procédé de fabrication choisi pour leur réalisation y est tout particulièrement présenté. La troisième partie est dédiée à la conception et la réalisation de filtres à bande interdite électromagnétique innovants fonctionnant dans la bande Ka. L’utilisation de céramiques telles que la Zircone et le BZT est aussi étudiée. La dernière partie de ce mémoire se concentre sur l’étude de structures 3D à bande interdite électromagnétique de type « tas de bois ». Ces cristaux particuliers sont étudiés afin de proposer des solutions de guidage et de filtrage innovants tout en utilisant différentes céramiques pour leur fabrication
This work is about the design and manufacturing of 3D components made out of ceramic material by stereolithography. This process is able to manufacture complex 3D shapes out of several ceramic materials. These components bring new and innovative filtering solutions to the current ones. The first part presents the particular properties of electromagnetic bandgap materials and several 1D, 2D and 3D structures. Several manufacturing process are as well studied. The second part deals with the design and manufacturing of dielectric resonators made out of Alumina and working in the Ku band. The chosen manufacturing process is more precisely described. The third part presents the design and manufacturing of innovative electromagnetic bandgap filters working in the Ka band. In this part the use of several ceramic materials like the Zirconia and BZT ceramic is particularly studied. Finally the last part is focused on 3D electromagnetic structures called “woodpile”. These particular crystals are studied in order to propose innovative guiding and filtering devices which are made out of several ceramic materials
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Lubega, George W. (George Willy). "Benzimidazole (BZ) resistance in Haemonchus controtus : specific interactions of BZs with tubulin." Thesis, McGill University, 1991. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=70203.

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The mechanism of benzimidazole (BZ) anthelmintic resistance in Haemonchus contortus was investigated. The total binding (TB), low-affinity binding (LAB) and high-affinity (specific) binding (HAB) of ($ sp3$H) BZs (mebendazole (MBZ), oxibendazole (OBZ), albendazole (ABZ) and oxfendazole (OFZ)) in supernatants derived from BZ-susceptible (S) and BZ-resistant (R) strains were examined and compared. The TB of all ($ sp3$H) BZs was reduced for the R strain. The TB of OBZ, MBZ and ABZ was separated into LAB and HAB. However, OFZ bound with low-affinity. The binding affinity, K$ sb{ rm a},$ and maximum binding, B$ sb{ rm max},$ for the HAB of OBZ and MBZ were calculated using computer programs. Compared with the S strain, the B$ sb{ rm max}$ of the R strain was reduced but the K$ sb{ rm a}$ was not affected. LAB to parasite preparations devoid of tubulin was observed but HAB occurred to preparations containing tubulin only. The HAB per mg protein decreased from egg through larva to adult stage. It was shown by sodium dodecyl sulphate-polyacrylamide gel electrophoresis (SDS-PAGE), Western blot and enzyme-linked immunosorbent assay (ELISA) analysis that the tubulin content per mg protein decreased from egg, through larva to adult worm. The ability of various BZs--OBZ, MBZ, ABZ, OFZ, fenbendazole (FBZ), albendazole sulphoxide (ABZSO), albendazole sulphone (ABZSO$ sb2),$ and thiabendazole (TBZ)--to bind tubulin was compared by displacement analysis and their IC$ sb{50}$ ( (BZ) required to inhibit 50% of the ($ sp3$H) BZ binding) and K$ sb{ rm a}$ values were determined. The IC$ sb{50}$ and K$ sb{ rm a}$ values approximately correlated with the known anthelmintic potency (recommended therapeutic doses) of the BZs except for OFZ and ABZSO. Tubulin bound BZs at 4$ sp circ$C with lower K$ sb{ rm a}$ than at 37$ sp circ$C. Western blot of tubulin separated by 2-dimensional electrophoresis showed that the $ beta$-tubulin isoform pattern of the S and R strains were dissimilar whil
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Knight, Michael K. "Bit by bit." Claremont Graduate University, 2010. http://ccdl.libraries.claremont.edu/u?/stc,82.

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Malm, Martin. "Beckholmen bit för bit." Thesis, KTH, Arkitektur, 2013. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-150351.

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På Beckholmen ligger stockholmsregionens enda aktiva reparationsvarv med kapacitet att ta emot såväl större fartyg samt skärgårdstrafikens fartyg. För att kunna bedriva verksamheten på ett säkert och miljövänligt sätt krävs infrastrukturella investeringar i form av byggnader och anläggningar. Stockholms stad har påbörjat ett programarbete och  presenterat ett förslag till detaljplan som möjliggör dessa investeringar.  Då det handlar om stora investeringar och förändringar i stadsbilden är den nya detaljplanen ett känsligt projekt, särskilt om varvsverksamheten skulle hamna i ekonomiska svårigheter. I det förslag till detaljplan som presenterats hösten 2012 har varsverksamhetens funktioner lagts inom en och samma byggnadsvolym, som till en följd blir väldigt stor.   Frågeställningen i ”Beckholmen bit för bit” är om en detaljplan som låter verksamheten växa mer inkrementellt fördelat på fler byggnader kan göra projektet mer flexibelt.   Efter studier av varvsverksamhetens program samt volym och planstudier, blir slutsatsen att det finns fördelar med att fördela varvsfunktionerna på fler byggnadsvolymer. Särskilt om byggnaderna gestaltas på ett sätt så att kompositionen är öppen för förändring. Ett förslag på en gestaltning som uppfyller dessa egenskaper presenteras även.
The only active shipyard in the Stockholm region  with capacity for large ships and the archipelago fleet is situated at Beckholmen. Large investments in infrastructure and buildings are needed in order to secure the enviroment and worker safety. The city has presented a proposal for new planning enabeling these investments. As the investment are large and the site is sensitive the project has many potential risks, especially if the shipyard should encounter economic difficulties in the future. In the citys planning proposal presented in 2012 the whole program for the shipyard is contained within one single volume.   The question at issue in ”Beckholmen bit by bit” thus is if planning that splits the program into separate buildings and permits incremental growth is prefarable.   After program studies, volume and plan studies the conclusion is that there are many advantages with planning that encourages incremental growth of the shipyard at Beckholmen, especially if the building design is open to change from the beginning. A proposal of a planning and design fulfilling these qualities is also presented.
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Books on the topic "BZT"

1

Ṣāliḥ, ʻUthmān Maḥmūd. Bayt Maḥsīr. al-Buqʻah, al-Urdun: Yuṭlabu min ʻU.M. Ṣāliḥ, 1989.

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Dusen, Kate Van. But but. Toronto: Underwhich Editions, 1988.

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Gray, Susan Heinrichs. Road to recovery Gray bat. Ann Arbor, MI: Cherry Lake Pub., 2008.

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Gray, Susan Heinrichs. Gray bat. Ann Arbor, MI: Cherry Lake Pub., 2007.

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Zakai, M. Sh. Sefer halikhot la-vat mitsṿah: Kolel halikhot ṿe-hanhagot, ḥidot, pitgamim, maʻaśiyot le-vat ha-mitsṿah ule-khol bat ... Yerushalayim: Yeshivat Or Yom Ṭov, 2005.

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Arnold, Virginia A. Bit by bit. New York: Macmillan Pub. Co., 1987.

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Sanfield, Steve. Bit by bit. New York: Philomel Books, 1995.

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Kammer, Manfred. Bit um Bit. Stuttgart: J.B. Metzler, 1997. http://dx.doi.org/10.1007/978-3-476-03996-5.

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Reichs, Kathy. Bot voor bot. 6th ed. Amsterdam: De Boekerij, 2007.

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Bit bat bee, rime with me!: Word patterns and activities, grades K-3. Columbus, Ohio: Linworth Pub., 2009.

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Book chapters on the topic "BZT"

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Patel, Satyanarayan. "Pyroelectric Energy Harvesting Potential in Lead-Free BZT-BST Ceramics." In Intelligent Manufacturing and Energy Sustainability, 175–83. Singapore: Springer Singapore, 2021. http://dx.doi.org/10.1007/978-981-33-4443-3_17.

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Kluwick, Alfred. "Weakly-nonlinear Hyperbolic Waves in BZT-fluids." In Hyperbolic Problems: Theory, Numerics, Applications, 559–68. Basel: Birkhäuser Basel, 1999. http://dx.doi.org/10.1007/978-3-0348-8724-3_7.

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Chen, Lei, Xiao Hui Wang, Long Tu Li, and Zhi Lun Gui. "Dielectric Characteristics of BZT Nano-Powder Based Ceramics." In High-Performance Ceramics III, 137–40. Stafa: Trans Tech Publications Ltd., 2007. http://dx.doi.org/10.4028/0-87849-959-8.137.

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Jaafar, H. "Effect of Sintering Temperature on V2O5 Doped Barium Zinc Tantalate (BZT) Dielectric Properties." In InCIEC 2014, 885–94. Singapore: Springer Singapore, 2015. http://dx.doi.org/10.1007/978-981-287-290-6_77.

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Choi, Won Seok, Young Park, Jin Hyo Boo, Junsin Yi, and Byung You Hong. "Synthesis and Characterization of Ce-Doped BZT Thin Films Deposited by a RF Magnetron Sputtering Method." In Advanced Nondestructive Evaluation I, 1336–39. Stafa: Trans Tech Publications Ltd., 2006. http://dx.doi.org/10.4028/0-87849-412-x.1336.

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Manivannan, Swathi, and Dibakar Das. "Processing of Barium Zinc Tantalate (BZT) Microwave Dielectric Ceramics for RF Window Application in Fusion Reactor." In Handbook of Advanced Ceramics and Composites, 1–36. Cham: Springer International Publishing, 2019. http://dx.doi.org/10.1007/978-3-319-73255-8_24-1.

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Manivannan, Swathi, and Dibakar Das. "Processing of Barium Zinc Tantalate (BZT) Microwave Dielectric Ceramics for RF Window Application in Fusion Reactor." In Handbook of Advanced Ceramics and Composites, 793–828. Cham: Springer International Publishing, 2020. http://dx.doi.org/10.1007/978-3-030-16347-1_24.

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Roser, Traugott, Poli Zach-Sofaly, and Marianne Bevier. "BVT-Nachrichten und Nachrichten BAT Österreich." In Professionalität zwischen Können und Wollen, 96–102. Göttingen: Vandenhoeck & Ruprecht, 2017. http://dx.doi.org/10.13109/9783666806186.96.

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Kammer, Manfred. "Einleitung." In Bit um Bit, 1–7. Stuttgart: J.B. Metzler, 1997. http://dx.doi.org/10.1007/978-3-476-03996-5_1.

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Kammer, Manfred. "Materialsammlung und -ordnung." In Bit um Bit, 8–23. Stuttgart: J.B. Metzler, 1997. http://dx.doi.org/10.1007/978-3-476-03996-5_2.

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Conference papers on the topic "BZT"

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Batra, Punita, and Sangeeta Singh. "Phase formation in BZT (10/90) ceramic." In SOLID STATE PHYSICS: Proceedings of the 58th DAE Solid State Physics Symposium 2013. AIP Publishing LLC, 2014. http://dx.doi.org/10.1063/1.4872504.

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Prasad, Rishu, Tathagata Ghosh, and S. K. S. Parashar. "Synthesis and analysis of nano BZT-BCT thin film for microwave application." In 2018 International Conference on Applied Electromagnetics, Signal Processing and Communication (AESPC). IEEE, 2018. http://dx.doi.org/10.1109/aespc44649.2018.9033225.

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Singh, A. "Characterization of Pb-free BZT-BCT ceramics synthesized by solid state reaction process." In 2013 International Conference on Emerging Trends in Computing, Communication and Nanotechnology (ICE-CCN). IEEE, 2013. http://dx.doi.org/10.1109/ice-ccn.2013.6528469.

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Dey, Koushik, Abdul Ahad, Kamini Gautam, and D. K. Shukla. "Domain wall freezing behavior in near triple point Pb free BZT-BCT ceramic composition." In DAE SOLID STATE PHYSICS SYMPOSIUM 2018. AIP Publishing, 2019. http://dx.doi.org/10.1063/1.5112851.

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Khandelwal, Priyanka, N. Ahlawat, R. S. Kundu, Kanta Maan Sangwan, Kanika Rani, and Suman Rani. "Structural and dielectric study of Cr doped BZT ceramics." In DAE SOLID STATE PHYSICS SYMPOSIUM 2019. AIP Publishing, 2020. http://dx.doi.org/10.1063/5.0017429.

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Wang, Chun-Wei, and Zvi Rusak. "Numerical studies of transonic BZT gas flows around thin airfoils." In 2nd AIAA, Theoretical Fluid Mechanics Meeting. Reston, Virigina: American Institute of Aeronautics and Astronautics, 1998. http://dx.doi.org/10.2514/6.1998-2690.

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Akyurekli, Ayse Gul, Mevlut Gurbuz, Mert Gul, Hakan Gulec, and Aydin Dogan. "Energy harvesting potential of lead free NBT-BZT piezoelectric ceramics." In 2014 15th International Conference on Electronic Packaging Technology (ICEPT). IEEE, 2014. http://dx.doi.org/10.1109/icept.2014.6918709.

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Akyurekli, Ayse Gul, Mevlut Gurbuz, Mert Gul, Hakan Gulec, and Aydin Dogan. "Energy harvesting potential of lead free NBT-BZT piezoelectric ceramics." In 2014 Joint IEEE International Symposium on the Applications of Ferroelectrics, International Workshop on Acoustic Transduction Materials and Devices & Workshop on Piezoresponse Force Microscopy (ISAF/IWATMD/PFM). IEEE, 2014. http://dx.doi.org/10.1109/isaf.2014.6922958.

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Bhardwaj, Chandan, Ashvani Kumar, Davinder Kaur, Dinesh K. Aswal, and Anil K. Debnath. "Structural And Electrical Analysis Of Lead Free BZT-xBCT Ceramics." In INTERNATIONAL CONFERENCE ON PHYSICS OF EMERGING FUNCTIONAL MATERIALS (PEFM-2010). AIP, 2010. http://dx.doi.org/10.1063/1.3530514.

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Jarupoom, P., K. Pengpat, S. Eitssayeam, and G. Rujijanagul. "Phase transition and dielectric properties of B2O3 doped BZT ceramics." In ADVANCED MATERIALS AND NANOTECHNOLOGY: Proceedings of the International Conference (AMN‐4). American Institute of Physics, 2009. http://dx.doi.org/10.1063/1.3203238.

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Reports on the topic "BZT"

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Levitt, Kathleen. There But Not But Now. Portland State University Library, January 2000. http://dx.doi.org/10.15760/etd.7398.

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Stokke, Knut Bjørn, and Eli Havnen. "Bit for bit" utbygging i kystsonen. Oslo: By- og regionforskningsinstituttet NIBR, 2009. http://dx.doi.org/10.7577/nibr/samarbeidsrapport/2009/1.

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Perkins, John. Bat Homing. Portland State University Library, January 2000. http://dx.doi.org/10.15760/etd.2202.

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Dow, Stephen J. BST Graphics Platform. Fort Belvoir, VA: Defense Technical Information Center, July 2004. http://dx.doi.org/10.21236/ada427758.

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Kinzie, Kevin, Amanda Hale, Victoria Bennett, Brad Romano, John Skalski, Karyn Coppinger, and Myron F. Miller. Ultrasonic Bat Deterrent Technology. Office of Scientific and Technical Information (OSTI), November 2018. http://dx.doi.org/10.2172/1484770.

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Herrero Gutiérrez, FJ. Del verbo al bit. Revista Latina de Comunicación Social, December 2016. http://dx.doi.org/10.4185/cac115.

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Herrero Gutiérrez, FJ, and C. Mateos Martín. Del verbo al bit. Revista Latina de Comunicación Social, December 2016. http://dx.doi.org/10.4185/cac116.

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Carrico, Melanie. Bat-wing Denim Dress. Ames (Iowa): Iowa State University. Library, January 2019. http://dx.doi.org/10.31274/itaa.8777.

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Dow, Stephen J. BST Imagery Generation Task. Fort Belvoir, VA: Defense Technical Information Center, January 1998. http://dx.doi.org/10.21236/ada346086.

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Blanchong, Julie. Iowa Acoustic Bat Surveys. Ames: Iowa State University, Digital Repository, 2017. http://dx.doi.org/10.31274/farmprogressreports-180814-1594.

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