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Relevant bibliographies by topics / Manganese zinc ferrite

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Academic literature on the topic 'Manganese zinc ferrite'

Author: Grafiati

Published: 4 June 2021

Last updated: 1 February 2022

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Journal articles on the topic "Manganese zinc ferrite"

1

Bhalla, Deepak, S. K. Aggarwal, G. P. Govil, and Ish Kakkar. "Manufacturing of Manganese-Zinc Soft Ferrite by Powder Metallurgy." Open Materials Science Journal 4, no. 1 (February 3, 2010): 26–31. http://dx.doi.org/10.2174/1874088x010040100026.

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Objective of this paper is, improvement of quality of Mn-Zn soft ferrites manufactured by powder metallurgy and overall output yield of it's plant. The efforts have been made to synthesize the crucial parameters which are responsible for better material preparation, pressing and sintering. By adopting these recommendations, the rejection rate is substantially reduced and the variation in magnetic properties is less. Data, which give more uniformity in bigger lots and are responsible for more uniform magnetic properties, have been discussed. Simple, quality-control instruments and their measurement methods which can be incorporated for stage inspection have been explained. The additives for better ferrite powder preparation, granules making and to obtain better magnetic have been discussed. Improved pressing, sintering, porosity, density and permeability relationship have been drawn. A sintering method to obtain better sintered density and high permeability in ferrites is also explained.

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Al-Hada, Naif Mohammed, Mohamed Kamari Halimah, Abdul Halim Shaari, Elias Saion, Sidek A. Aziz, and Iskandar Shahrim Mustafa. "Structural and Morphological Properties of Manganese-Zinc Ferrite Nanoparticles Prepared by Thermal Treatment Route." Solid State Phenomena 290 (April 2019): 307–13. http://dx.doi.org/10.4028/www.scientific.net/ssp.290.307.

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The capping of manganese–zinc ferrite nanoparticle by polyvinyl pyrrolidone agent has been carried out by a simple thermal treatment route. The obtained nanopowder samples have been given a screening investigation for its elemental composition, structural and morphological behaviour. The observed crystalline phase of manganese–zinc ferrite nanopowder was evidenced by X-ray diffractometer at a calcination temperature of 650 °C with no other impurity phases being detected. The average crystallite size determined from the XRD data and TEM micrographs showed an increasing trend with increasing calcination temperature. The morphological examination revealed that the manganese–zinc ferrite nanoparticle exhibits a uniform shape with enhancement in nanoparticles dispersion as the calcination temperature increased.

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WAN, Y. P., D. N. FANG, and A. K. SOH. "EFFECTS OF MAGNETIC FIELD ON FRACTURE TOUGHNESS OF MANGANESE–ZINC FERRITE CERAMICS." Modern Physics Letters B 17, no. 02 (January 30, 2003): 57–66. http://dx.doi.org/10.1142/s0217984903004944.

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Effects of magnetic field on the fracture toughness of magnetic ceramics were experimentally investigated by the use of the single-edge-notch-beam (SENB) specimens of three kinds of manganese–zinc ferrite ceramics with different permeability. Results indicate that there is no significant change in the measured fracture toughness of the Manganese-Zinc Ferrite ceramics in the presence of the magnetic field. Furthermore, the crack lengths caused by the Vickers' indentation on the manganese–zinc ferrite ceramics show that the fracture toughness in the magnetic field direction is almost identical to that in the direction perpendicular to the magnetic field. This reveals that the polycrystalline ceramic still exhibits isotropic fracture behavior after magnetization. Finally, a qualitative explanation is given in terms of a small-scale magnetic saturation model.

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Srinivas Rao, S., A. Chandra Shekhar Reddy, D. Ravinder, B. Ravinder Reddy, and D. Linga Reddy. "Ultrasonic investigation on mixed manganese–zinc ferrite." Materials Letters 56, no. 3 (October 2002): 175–77. http://dx.doi.org/10.1016/s0167-577x(02)00435-4.

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Yung, Edward K., Brian W. Hussey, Arunava Gupta, and Lubomyr T. Romankiw. "Laser‐Assisted Etching of Manganese‐Zinc‐Ferrite." Journal of The Electrochemical Society 136, no. 3 (March 1, 1989): 665–73. http://dx.doi.org/10.1149/1.2096707.

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Inaba, Hideaki, and Tsuneo Matsui. "Vaporization and Diffusion of Manganese–Zinc Ferrite." Journal of Solid State Chemistry 121, no. 1 (January 1996): 143–48. http://dx.doi.org/10.1006/jssc.1996.0021.

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Seyyed Ebrahimi, S. A., and Z. Pishgahi Fard. "An Investigation on the Optimum Conditions for Preparation of Pure Mn-Mg-Zn Ferrite Powder." Key Engineering Materials 336-338 (April 2007): 699–702. http://dx.doi.org/10.4028/www.scientific.net/kem.336-338.699.

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Manganese- Zinc ferrite is one of the most important spinel ferrites which is used in the electronics applications. These ferrites have an open lattice and can tolerate large amounts of the other metallic ions in their lattice. One of these divalent ions that can sit in the unit cell of Mn-Zn ferrites is Magnesium. Mn-Mg-Zn ferrites are new materials which is thought to be a good candidate for dielectric applications. In this work, a suitable relative values of raw materials for preparing pure Mn-Mg-Zn ferrite powder have been determined. It is carried out by using XRD experiments. The optimum temperature and time of calcination were also investigated by DTA/TGA, XRD and SEM techniques.

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Al-Hilli, Muthafer F. "A comparison study of the Structural and magnetic properties of pure Ni metal and NiZnMn ferrite." Iraqi Journal of Physics (IJP) 17, no. 43 (November 29, 2019): 18–25. http://dx.doi.org/10.30723/ijp.v17i43.418.

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The magnetic properties of a pure Nickel metal and Nickel-Zinc-Manganese ferrites having the chemical formula Ni0.1(Zn0.4Mn0.6)0.9Fe2O4 were studied. The phase formation and crystal structure was studied by using x-ray diffraction which confirmed the formation of pure single spinel cubic phase with space group (Fd3m) in the ferrite. The samples microstructure was studied with scanning electron microstructure and EDX. The magnetic properties of the ferrite and nickel metal were characterized by using a laboratory setup with a magnetic field in the range from 0-500 G. The ferrite showed perfect soft spinel phase behavior while the nickel sample showed higher magnetic loss and coercivity.

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Washburn, Cody, Jacob Jorne, and Santosh Kurinec. "Cathodic Electrophoretic Deposition of Ceramic Nano-Particle Manganese Zinc Ferrite." Key Engineering Materials 314 (July 2006): 127–32. http://dx.doi.org/10.4028/www.scientific.net/kem.314.127.

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The electrophoretic deposition (EPD) of micro/nano-particle manganese zinc ferrite (Mnx Zn1-xFe2O4) material has been carried out on silicon substrates. EPD is performed in isopropanol (IPA) solutions containing charging and adhesion agents. The ferrite powders were prepared by grinding ceramic sintered toroids of a commercial high permeability Mn-Zn ferrite. The ferrite film has been deposited up to 4μm in thickness in 30 minutes showing good selectivity to silicon patterned with 250nm thermally grown silicon dioxide. Additionally, selective deposition has been observed on heavily doped p-type regions in n-type silicon substrates. The deposition process is a self limiting process with the initial high elerophoretic current declining to 10% of its value in 10 minutes. This result suggests that majority of ferrite deposition occurs in first 10 minutes. The deposition rate and zeta potential measurements indicate a high particle velocity on the order 5.7x10-3 cm/s with an electric field of 160V/cm generated across the 2 cm electrode spacing. An amorphous like interfacial layer is observed in as deposited substrates. The scanning electron micrographs indicate pattern filling and conformal deposition on copper planar micro-inductors fabricated by chemical mechanical planarization. These results are promising for powder ferrite material (hard and soft) to be selectively deposited for a wide variety of applications in microelectronics passive components and in MEM’s based applications

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Yuan, Quan, Wang Qun, Zhi Xue Qu, Zi Xin Gu, and Tong Wu. "Preparation and Electromagnetic Properties of Manganese Zinc Ferrite/Barium Ferrite Composite Materials." Key Engineering Materials 519 (July 2012): 215–19. http://dx.doi.org/10.4028/www.scientific.net/kem.519.215.

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Abstract: Manganese zinc ferrite/barium ferrite composite materials were prepared with various content of Z type barium ferrite (0, 10, 20 wt%) using solid state reaction method. The effect of the compositon on the microstructure and electromagnetic properties of the composites are investigated by means of X-ray diffraction, scanning electron microscope and impedance analyzer. The X-ray diffraction patterns reveal that W phase of barium ferrite instead of Z phase appears in the composite sintered as well as the spinel phase. Some small hexagonal grains were observed in the SEM images and the proportion increases with increasing content of barium ferrite. The cut-off frequencies of the composite systematically shift towards high frequency from 2.5 MHz to 32.6 MHz which is attributed to the increasing of W phase. The composites show a higher frequency for the maximum of the impedance as well as a higher value of the impedance at certain frequency which may be benefit for the application at GHz frequency range.

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Dissertations / Theses on the topic "Manganese zinc ferrite"

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Roberts, V. A. "The production of manganese zinc ferrite by the citrate gel route." Thesis, University of Manchester, 1987. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.380216.

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Colán, Victoria Amelia Lázaro. "Perdas em ferritas de manganês zinco: o papel da sinterização e de parâmetros microestruturais." Universidade de São Paulo, 2010. http://www.teses.usp.br/teses/disponiveis/3/3133/tde-30112010-144937/.

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O uso das ferritas de manganês zinco em fontes de potência de carregadores de bateria vem crescendo nos últimos anos, devido a suas baixas perdas magnéticas em induções da ordem de 0,2 T. Estas ferritas pertencem à categoria de ferritas moles, são óxidos ferrimagnéticos, policristalinos com estrutura cúbica tipo espinélio. Pós desse material foram compactados em prensa uniaxial e em prensa automática de produção para anel e toróide, respectivamente. Foram realizados dois ciclos de queima variando o teor de oxigênio entre 5 e 15%, no patamar de sinterização, com o propósito de avaliar seu efeito na densidade, microestrutura, perdas magnéticas em altas induções (0,2 T) e permeabilidade. Amostras sinterizadas em posições mais quentes do forno resultaram em maior densidade e maior tamanho de grão, conforme esperado, mas resultaram em maiores perdas a 25 °C. O aumento do teor de oxigênio entre 5 e 15% não alterou sistematicamente a densidade, mas resultou num pequeno aumento do tamanho de grão. Já a correlação entre teor de oxigênio e perdas foi complexa. Foi observado que existe uma temperatura de mínimo nas perdas totais por volta de 60 °C. O mesmo comportamento foi observado na curva da perda histerética, compatível com a variação da constante de anisotropia magnetocristalina (K1). Foram realizados ensaios de curvas de histerese a partir de 25 até 100 °C, a 0,2 T com o objetivo de avaliar o efeito da temperatura nas duas parcelas da perda histerética. Amostras sinterizadas a 1290 °C com a menor pressão de oxigênio apresentaram menor temperatura de mínimo de perda. As técnicas de análise química do teor de Fe2+ não foram capazes de estabelecer, inequivocamente, a esperada relação entre essa variável e o teor de oxigênio da atmosfera de sinterização.
The use of manganese zinc ferrite in power sources of battery chargers is growing, due to its low magnetic power losses at inductions around 0.2 T. These ferrites belong to the soft magnetic materials group, they are polycrystalline ferromagnetic oxides with face centered cubic structure. Powders of this material were compacted in uniaxial press and in automatic press of production, by ring and toroidal form, respectively. Two firing cycles, varying the atmosphere oxygen content between 5 and 15%, were applied to evaluate its effect on microstructure, density, magnetic losses in high induction and permeability. Samples sintered in warmer positions inside the furnace resulted in higher density and larger grain size, as expected, but higher losses at 25 °C were achieved. Increasing the atmosphere oxygen content from 5 to 15% did not alter density significantly, but resulted in a slight increase in grain size. On the other hand, the correlation between oxygen content and losses was complex. There are lower losses, at 60 °C. Similar behavior was observed with hysteresis loss, which is compatible with the change in magnetocrystalline magnetic anisotropy (K1). Measurements were performed from 25 to 100 °C, at 0.2 T, aiming at the evaluation of the effect of temperature on the two parcels of hysteresis loss. Samples sintered at 1290 °C with low atmosphere oxygen content showing a minimum on the losses versus temperature curve. The available techniques to analyze Fe2+ content were not capable of establishing, unequivocally, the expected relation between this variable and the oxygen content of the sintering atmosphere.

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Recouvreur, Michel. "Contribution à l'étude des liants organiques pour ferrites étude de l'alcool polyvinylique dans le ferrite manganèse-zinc /." Grenoble 2 : ANRT, 1986. http://catalogue.bnf.fr/ark:/12148/cb37600681v.

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Verdier, Thomas. "Elaboration de poudres nanostructurées de ferrites de manganèse-zinc par mécanosynthèse : Influence des paramètres de broyage." Rouen, 2006. http://www.theses.fr/2006ROUES042.

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Les ferrites mixtes de Mn-Zn ont un grand intérêt commercial du fait de leurs propriétés magnétiques à haute fréquence. Cette thèse présente l’influence des modes de broyage sur la synthèse de ferrites Mn-Zn à partir d’oxydes simples. La ferrite obtenue par mécanosynthèse présente une réorganisation de la distribution cationique au sein de la structure spinelle, ce qui peut améliorer les propriétés du matériau massif après mise en forme. Des broyages réalisés dans un matériel en acier ont permis de mettre en évidence la présence de Fe2+ provenant de réactions d’oxydo-réduction entre le fer et les oxydes. Des broyages réalisés dans des jarres en WC ont conduit à l’obtention de phases pures de ferrites de zinc et de manganèse-zinc exemptes d’ions Fe2+. Des expériences de spectrométrie Mössbauer sous champ magnétique ont permis de préciser la distribution cationique des ferrites synthétisés
Spinel ferrites compounds are widely used for their technological applications, which are essentially their magnetic and catalytic properties. Nanocrystalline Mn-Zn ferrites have been synthesized by high-energy ball milling in different media (tempered steel and WC) starting from simple oxides (α-Fe2O3, ZnO and MnO). This technique leads to a change in the distribution of cations in both sites, resulting in an increase of magnetic properties. X-ray diffraction, Mössbauer spectrometry and VSM are used to characterize the powders. This work shows that a redox reaction is observed between Fe11 and metalling iron during milling in steel medium, leading to a spinel phase containing some Fe11. The mechanism for the appearance of this phase is studied : ZnO seems to have a non negligeable influence on the synthesis, by creating an intermediate wüstite-type phase solid solution with FeO. Millings in WC medium permit to avoid the Fe11 contamination

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Mukherjee, Devajyoti. "Growth and Characterization of Epitaxial Thin Films and Multiferroic Heterostructures of Ferromagnetic and Ferroelectric Materials." Scholar Commons, 2010. http://scholarcommons.usf.edu/etd/3622.

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Multiferroic materials exhibit unique properties such as simultaneous existence of two or more of coupled ferroic order parameters (ferromagnetism, ferroelectricity, ferroelasticity or their anti-ferroic counterparts) in a single material. Recent years have seen a huge research interest in multiferroic materials for their potential application as high density non-volatile memory devices. However, the scarcity of these materials in single phase and the weak coupling of their ferroic components have directed the research towards multiferroic heterostructures. These systems operate by coupling the magnetic and electric properties of two materials, generally a ferromagnetic material and a ferroelectric material via strain. In this work, horizontal heterostructures of composite multiferroic materials were grown and characterized using pulsed laser ablation technique. Alternate magnetic and ferroelectric layers of cobalt ferrite and lead zirconium titanate, respectively, were fabricated and the coupling effect was studied by X-ray stress analysis. It was observed that the interfacial stress played an important role in the coupling effect between the phases. Doped zinc oxide (ZnO) heterostructures were also studied where the ferromagnetic phase was a layer of manganese doped ZnO and the ferroelectric phase was a layer of vanadium doped ZnO. For the first time, a clear evidence of possible room temperature magneto-elastic coupling was observed in these heterostructures. This work provides new insight into the stress mediated coupling mechanisms in composite multiferroics.

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Martins, Da Silva Fernando Henrique. "Etude structurale, distribution cationique et état d'oxydation dans des nanoparticules magnétiques de ferrite du type coeur-coquille." Thesis, Paris 6, 2016. http://www.theses.fr/2016PA066102/document.

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Nous explorons les propriétés structurales de nanoparticules cœur-coquille, avec un cœur de ferrite MFe2O4 (M = Mn et Co) ou de ferrite mixte Mn-Zn. Ces nanoparticules sont obtenues par co-précipitation hydrothermique et sont dispersées en milieu acide par un traitement de surface empirique au nitrate ferrique, protégeant les nanograins contre une dissociation chimique par une fine couche superficielle de maghémite. La fraction volumique du cœur, de la coquille et l’épaisseur de la couche superficielle sont déterminées par dosage chimique. Nous suivons les changements structurels des nanocristaux de MnFe2O4 et CoFe2O4, pendant la durée du traitement de surface, tandis que ceux des nanoparticules de ferrite mixte Mn-Zn sont étudiés en fonction de leur teneur en zinc. Diffraction de rayons-x et de neutrons sont utilisées pour déterminer les paramètres de structure, en particulier la diffusion de cations dans les interstices de la ferrite spinelle. Pour un haut degré de fiabilité, des raffinements de Rietveld sont réalisés. Les distances inter-atomiques, l’état d’oxydation moyen et le degré d’inversion sont déterminés par spectroscopie d’absorption des rayons-x. Morphologie, cristallinité et taille des nanoparticules de ferrite mixte Mn-Zn sont étudiées par TEM/HRTEM et par diffraction des électrons. Dans les nanoparticules MnFe2O4 et de ferrite mixte Mn-Zn, on constate la présence de cations Mn3+ en environnement octaédrique, responsables de déformations anisotropes (effet Jahn-Teller). Le degré d’inversion obtenu ici diffère de celui du bulk en raison de la réduction à l’échelle nanométrique et de l'augmentation du rapport surface/volume pendant le processus de synthèse
Structural properties of core-shell ferrite nanoparticles MFe2O4 (M = Mn and Co) and Mn-Zn ferrite nanoparticles are here investigated. The nanoparticles are synthesized by hydrothermal co-precipitation and are dispersed in acid medium thanks to an empirical surface treatment by ferric nitrate, which prevents the chemical dissociation by a thin maghemite layer incorporated at the surface of the nano-grains. Chemical titrations allow us to calculate volume fractions of core and shell, as well as the surface-layer thickness. Structural changes induced by the surface treatment are followed as a function of treatment duration in MnFe2O4 and CoFe2O4 nanocrystals. Whereas structural changes in Mn-Zn ferrite nanoparticles are investigated as a function of zinc content. X-ray and Neutron diffractions are used to determine the structural parameters, in particular cationic distribution in the spinel ferrite sites. Precise structural information with high degree of reliability is obtained by Rietveld refinements. To investigate the local structure of these materials, X-ray Absorption Spectroscopy measurements are performed, allowing determining interatomic distances, mean oxidation state and inversion degree. Morphology, crystallinity and size of mixed-ferrite nanoparticles are investigated by TEM/HRTEM and electron diffraction. In Mn-Zn ferrite nanoparticles, the presence of Mn3+ in octahedral environment is responsible for anisotropic distortions, known as Jahn-Teller effect. The inversion degree obtained in this work diverges from the bulk values due to the reduction to nanoscale and to the increase of the surface/volume ratio, associated to the synthesis process

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Abbali, Zineb. "Etude de la cristallisation de ferrites spinelles dans des verres borates." Grenoble 2 : ANRT, 1988. http://catalogue.bnf.fr/ark:/12148/cb376110731.

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Martins, Murillo Longo. "Síntese e caracterização de ferritas de manganês e zinco visando aplicação como agente de contraste em diagnóstico médico (biosusceptometria de corrente alternada) /." Bauru : [s.n.], 2011. http://hdl.handle.net/11449/99701.

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Resumo: Para o aprimoramento de técnicas de diagnóstico e tratamentos de doenças o desenvolvimento de materiais magnéticos é de primordial importância. Neste trabalho as ferritas de manganês e zindo de fórmula geral Mn(1-x)ZNxFe204, onde x assume os valores entre 0,15 e 0,30, foram preparadas pelo método dos precursores poliméricos e caracterizadas por: análises térmicas (termogravimetria associada com análise térmica diferencial (TG/DTA), análise composicional semi-quantitativa por energia dispersiva de raios X (EDX), difratometria de raios X (DRX), refinamento estrutural (Método de Rietveld), adsorção de N2 a 77K (BET), microscopia eletrônica de varredura (MEV), microscopia óptica, espectroscopia de absorção atômica (testes de lixiviação) e medidas de susceptibilidade e permeabilidade magnética. As amostras de ferritas foram também revestidas com quitosana e analisadas com algumas dessas técnicas. Os materiais foram desenvolvidos com o objetivo de utilizá-los como rastreador em biosusceptometria de corrente alternada(BAC), um método de diagnóstico. O método de síntese empregado proporcionou materiais monofásicos em ferrita com baixa porosidade e área superficial. Os materiais apresentaram baixa lixiviação de metais em soluções que simulam os meios fisiológicos do trato gastrointestinal. O revestimento com quitosana foi eficiente suprimindo a dissolução de metais em meios com pHs 7,5 e 6,8. Em pH 1,2, o revestimento se mostrou menos eficiente, porém, ainda assim foi capaz de reduzir a dissolução das espécies que constituem a ferrita. Quanto ao comportamento magnético, as amostras apresentaram magnetizações satisfatórias em 10K e em temperatura ambiente. A amostra contendo zinco a x=0,15 apresentou a mais alta saturação magnética em temperatura ambiente e foi utilizada em um teste com a técnica de BAC apresentando resultados satisfatórios
Abstract: The development of magnetic materials is of primary importance for the improvement of diagnostic techniques and treatments of diseases. In this work, the manganese and zinc ferrites with general formula of Mn(1-x)ZNxFe204 and 0,15< x <0,30, was prepared by polymeric precursor method and characterized by the physical techniques as: thermal analysis [thermogravimetry and differential thermal analysis (TG/DTA)], ssemi-quantitative analysis of the composition by energy dispersive X ray (EDX), X ray diffractometry (XRD), structural refinement (Rietveld Method), N2 adsorption analysis at 77k (BET), scanning electron microscopy (SEM), optical microscopy, atomic absorption spectroscopy (lixiviation test) and magnetic susceptibility measurements. Chitosan coated samples were also prepared which were analyzed by some of those technique. The materials were developed to be used as a tracer in the alternating current biosusceptometry (ACB), a diagnostic method. The employed synthesis method provided monophasic samples of ferrites with low porosity and surface area. The materials showed low metal solubility in the media that simulate gastrointestinal tract solutions. The chitosan coating was efficient to suppress the metal dissolution in solutions with pHs 7.5 and 6.8. In pH=1.2 medium, the coating was not efficient, but still reduced the resolution of ferrite components. The magnetic measurements showed that the samples have satisfactory magnetizations at 10K and room temperature. The sample with x=0.15 exhibited the highest magnetic saturation at room temperature and it was applied in an ACB technique which showed satisfactory results
Orientador: Margarida Juri Saeki
Coorientador: Paulo Noronha Lisboa Filho
Banca: Luis Gallego Martinez
Banca: Andris Figueiroa Bakuzis
O programa de Pós-graduação em Ciência e Tecnologia de Materiais PosMat, tem caráter institucional e integra as atividades de pesquisa em materiais de diversos campi da UNESP
Mestre

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Martins, Murillo Longo [UNESP]. "Síntese e caracterização de ferritas de manganês e zinco visando aplicação como agente de contraste em diagnóstico médico (biosusceptometria de corrente alternada)." Universidade Estadual Paulista (UNESP), 2011. http://hdl.handle.net/11449/99701.

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Made available in DSpace on 2014-06-11T19:30:19Z (GMT). No. of bitstreams: 0 Previous issue date: 2011-01-24Bitstream added on 2014-06-13T21:00:49Z : No. of bitstreams: 1 martins_ml_me_bauru_prot.pdf: 4978378 bytes, checksum: ea637726b18b8011f5c90e28e4cbad26 (MD5)
Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)
Para o aprimoramento de técnicas de diagnóstico e tratamentos de doenças o desenvolvimento de materiais magnéticos é de primordial importância. Neste trabalho as ferritas de manganês e zindo de fórmula geral Mn(1-x)ZNxFe204, onde x assume os valores entre 0,15 e 0,30, foram preparadas pelo método dos precursores poliméricos e caracterizadas por: análises térmicas (termogravimetria associada com análise térmica diferencial (TG/DTA), análise composicional semi-quantitativa por energia dispersiva de raios X (EDX), difratometria de raios X (DRX), refinamento estrutural (Método de Rietveld), adsorção de N2 a 77K (BET), microscopia eletrônica de varredura (MEV), microscopia óptica, espectroscopia de absorção atômica (testes de lixiviação) e medidas de susceptibilidade e permeabilidade magnética. As amostras de ferritas foram também revestidas com quitosana e analisadas com algumas dessas técnicas. Os materiais foram desenvolvidos com o objetivo de utilizá-los como rastreador em biosusceptometria de corrente alternada(BAC), um método de diagnóstico. O método de síntese empregado proporcionou materiais monofásicos em ferrita com baixa porosidade e área superficial. Os materiais apresentaram baixa lixiviação de metais em soluções que simulam os meios fisiológicos do trato gastrointestinal. O revestimento com quitosana foi eficiente suprimindo a dissolução de metais em meios com pHs 7,5 e 6,8. Em pH 1,2, o revestimento se mostrou menos eficiente, porém, ainda assim foi capaz de reduzir a dissolução das espécies que constituem a ferrita. Quanto ao comportamento magnético, as amostras apresentaram magnetizações satisfatórias em 10K e em temperatura ambiente. A amostra contendo zinco a x=0,15 apresentou a mais alta saturação magnética em temperatura ambiente e foi utilizada em um teste com a técnica de BAC apresentando resultados satisfatórios
The development of magnetic materials is of primary importance for the improvement of diagnostic techniques and treatments of diseases. In this work, the manganese and zinc ferrites with general formula of Mn(1-x)ZNxFe204 and 0,15< x <0,30, was prepared by polymeric precursor method and characterized by the physical techniques as: thermal analysis [thermogravimetry and differential thermal analysis (TG/DTA)], ssemi-quantitative analysis of the composition by energy dispersive X ray (EDX), X ray diffractometry (XRD), structural refinement (Rietveld Method), N2 adsorption analysis at 77k (BET), scanning electron microscopy (SEM), optical microscopy, atomic absorption spectroscopy (lixiviation test) and magnetic susceptibility measurements. Chitosan coated samples were also prepared which were analyzed by some of those technique. The materials were developed to be used as a tracer in the alternating current biosusceptometry (ACB), a diagnostic method. The employed synthesis method provided monophasic samples of ferrites with low porosity and surface area. The materials showed low metal solubility in the media that simulate gastrointestinal tract solutions. The chitosan coating was efficient to suppress the metal dissolution in solutions with pHs 7.5 and 6.8. In pH=1.2 medium, the coating was not efficient, but still reduced the resolution of ferrite components. The magnetic measurements showed that the samples have satisfactory magnetizations at 10K and room temperature. The sample with x=0.15 exhibited the highest magnetic saturation at room temperature and it was applied in an ACB technique which showed satisfactory results

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LIU, JIN-XUAN, and 劉景軒. "Study on manganese zinc ferrite." Thesis, 1986. http://ndltd.ncl.edu.tw/handle/03941836239459423379.

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Books on the topic "Manganese zinc ferrite"

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Miyoshi, Kazuhisa. Effect of abrasive grit size on wear of manganese-zinc ferrite under three-body abrasion. [Washington, DC: National Aeronautics and Space Administration, 1987.

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Miyoshi, Kazuhisa. Abrasion and deformed layer formation of manganese-zinc ferrite in sliding contact with lapping tapes. [Cleveland, Ohio: National Aeronautics and Space Administration, Lewis Research Center, 1986.

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Pigram, A. J. The use of novel fabrication routes for the production of manganese-zinc and nickel-zinc ferrites. Manchester: UMIST, 1993.

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Book chapters on the topic "Manganese zinc ferrite"

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Washburn, Cody, Jacob Jorne, and Santosh Kurinec. "Cathodic Electrophoretic Deposition of Ceramic Nano-Particle Manganese Zinc Ferrite." In Electrophoretic Deposition: Fundamentals and Applications II, 127–32. Stafa: Trans Tech Publications Ltd., 2006. http://dx.doi.org/10.4028/0-87849-998-9.127.

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Singh, Rajender, and Gadipelly Thirupathi. "Manganese-Zinc Spinel Ferrite Nanoparticles and Ferrofluids." In Magnetic Spinels - Synthesis, Properties and Applications. InTech, 2017. http://dx.doi.org/10.5772/66522.

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Conference papers on the topic "Manganese zinc ferrite"

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Rinkevich, A. B., V. V. Ustinov, M. I. Samoylovich, S. M. Klesheva, and E. A. Kuznetsov. "Electromagnetic properties of nickel-zinc and manganese-zinc ferrite doped opal matrices in millimeter waveband." In 2007 European Microwave Conference. IEEE, 2007. http://dx.doi.org/10.1109/eumc.2007.4405112.

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Hiratsuka, N., T. Miyazaki, K. Kakizaki, O. H. Kwon, and B. C. Soo. "Epitaxial growth of [111] oriented manganese zinc ferrite thin films their magnetic properties." In IEEE International Magnetics Conference. IEEE, 1999. http://dx.doi.org/10.1109/intmag.1999.837779.

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Zhao, Hui, Xuehan Li, and Haitao Zhao. "Effect of Reaction Conditions on the Morphology and Properties of Manganese Zinc Ferrite." In 2020 3rd International Conference on Electron Device and Mechanical Engineering (ICEDME). IEEE, 2020. http://dx.doi.org/10.1109/icedme50972.2020.00121.

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Jeyanthi, J., K. R. Aswin Sidhaarth, and R. Jayalakshmi. "Performance analysis of manganese ferrite nanoparticles for the removal of zinc from synthetic wastewater." In Proceedings of the International Conference on Nanotechnology for Better Living. Singapore: Research Publishing Services, 2016. http://dx.doi.org/10.3850/978-981-09-7519-7nbl16-rps-292.

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Wan, Ping. "Preparation of Nano-Crystalline Manganese-Zinc Ferrite with Arabic Gum by Network Gel Method." In 7th International Conference on Education, Management, Information and Mechanical Engineering (EMIM 2017). Paris, France: Atlantis Press, 2017. http://dx.doi.org/10.2991/emim-17.2017.350.

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Patade, Supriya R., Deepali D. Andhare, Sandeep B. Somvanshi, Prashant B. Kharat, and K. M. Jadhav. "Effect of zinc doping on water-based manganese ferrite nanofluids for magnetic hyperthermia application." In DAE SOLID STATE PHYSICS SYMPOSIUM 2019. AIP Publishing, 2020. http://dx.doi.org/10.1063/5.0017051.

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Lal, Madan, and M. Singh. "Low-temperature synthesis and thermal study of manganese-zinc ferrite nanoparticles by a ferrioelate precursor method." In Smart Materials, Nano- and Micro-Smart Systems, edited by Jung-Chih Chiao, Andrew S. Dzurak, Chennupati Jagadish, and David V. Thiel. SPIE, 2006. http://dx.doi.org/10.1117/12.692326.

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Dhiman, R. L., Virender Singh, S. P. Taneja, and Kailash Chandra. "Structural investigation of manganese zinc ferrites." In PROCEEDINGS OF THE NATIONAL CONFERENCE ON RECENT ADVANCES IN CONDENSED MATTER PHYSICS: RACMP-2018. Author(s), 2019. http://dx.doi.org/10.1063/1.5097089.

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Hua Su, Huaiwu Zhang, Xiaoli Tang, and Xubo Dai. "Effects of P/sub 2/O/sub 5/ addition on manganese zinc ferrites." In INTERMAG Asia 2005: Digest of the IEEE International Magnetics Conference. IEEE, 2005. http://dx.doi.org/10.1109/intmag.2005.1464176.

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Ramos, Flávio J. H. Tommasini Vieira, Lucas Galhardo Pimenta Tienne, Maria de Fátima Vieira Marques, Marcelo Henrique Predo da Silva, Letícia dos Santos Aguilera, André Ben-Hur da Silva Figueiredo, and Simone Izabel Vieira de Santana. "SÍNTESE DE FILMES CONDUTORES COM FERRITA DE MANGANÊS OU DE ZINCO EM MATRIZ DE PMMA." In 74º Congresso Anual da ABM. São Paulo: Editora Blucher, 2019. http://dx.doi.org/10.5151/2594-5327-33528.

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