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Journal articles on the topic 'Electrical and dielectric properties'

Author: Grafiati

Published: 4 June 2021

Last updated: 4 February 2022

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1

Shabgard, Mohammad Reza, Hossein Faraji, Behnam Khosrozade, Hadi Eivazi-Bagheri, and Keivan Amini. "Study the Effects of Dielectric Type on the Machining Characteristics of γ-Ti Al in Electrical Discharge Machining." International Journal of Engineering Research in Africa 33 (November 2017): 40–49. http://dx.doi.org/10.4028/www.scientific.net/jera.33.40.

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The current study surveys the results of using deionized water and kerosene as dielectrics in the machining outputs of γ-TiAl intermetallic compound obtained in electric discharge machining. Influences of these different dielectrics properties on machining speed, tool wear, surface cracks and roughness were compared. Scanning electron microscopy micrographs were prepared to investigate influences of dielectrics on the surface characteristics of electrically discharged samples. Results indicate which by kerosene dielectric; the material removal rate (MRR) is further compared to another one. But deionized water as dielectric causes higher tool wear ratio than kerosene dielectric. Electrical discharged samples in deionized water have higher surface roughness, in addition it contains surface cracks, whereas kerosene dielectric results better surface finish in low pulse current. According to XRD spectra electric discharge machining in deionized water and kerosene dielectrics produces Ti3 Al intermetallic compound on the produced surface.

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2

Novák, Ján, and Ivan Vitázek. "Electrical Properties of Sunflower Achenes." Acta Technologica Agriculturae 17, no. 4 (December 1, 2014): 109–13. http://dx.doi.org/10.2478/ata-2014-0025.

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Abstract This work contains the results of measuring the electrical properties of sunflower achenes. The interest in electrical properties of biological materials resulted in engineering research in this field. The results of measurements are used for determining the moisture content, the surface level of liquid and grainy materials, for controlling the presence of pests in grain storage, for the quantitative determination of mechanical damage, in the application of dielectric heating, and in many other areas. Electrical measurements of these materials are of fundamental importance in relation to the analysis of quantity of absorbed water and dielectric heating characteristics. It is a well-known fact that electrical properties of materials, namely dielectric constant and conductivity, are affected by the moisture content of material. This fact is important for the design of many commercial moisturetesting instruments for agricultural products. The knowledge of dielectric properties of materials is necessary for the application of dielectric heating. The aim of this work was to measure conductivity, dielectric constant and loss tangent on samples of sunflower achenes, the electrical properties of which had not been sufficiently measured. Measurements were performed under variable moisture content and the frequency of electric field ranging from 1 MHz to 16 MHz, using a Q meter with coaxial probe. It was concluded that conductivity, dielectric constant and loss tangent increased with increasing moisture content, and dielectric constant and loss tangent decreased as the frequency of electric field increased.

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3

Ussenov, Y. A., T. S. Ramazanov, M. T. Gabdullin, M. K. Dosbolayev, and T. T. Daniyarov. "Investigation of electrical and optical properties of dielectric barrier discharge." Physical Sciences and Technology 2, no. 1 (2015): 9–12. http://dx.doi.org/10.26577/2409-6121-2015-2-1-9-12.

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4

Debnath, S., Prajna P. De, and D. Khastgir. "Ambient Electrical Properties of Mica-Styrene-Butadiene Rubber Composites." Rubber Chemistry and Technology 61, no. 4 (September 1, 1988): 555–67. http://dx.doi.org/10.5254/1.3536202.

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Abstract We have studied the effect of addition of (a) mica, (b) silane coupling agent, and (c) silane-treated mica on the ambient dielectric properties of vulcanized styrene-butadiene rubber. It is observed that both dielectric constant and dielectric loss increase as mica, silane, and silane-treated mica are added. The increase is more pronounced in the case of silane-treated mica than for the untreated mica systems. The observed values of dielectric constants are in close agreement with the calculated ones obtained from different theories of heterogeneous dielectrics. Dielectric strength shows an increasing trend in the presence of mica. At higher mica loading, D.C. conductivity decreases slightly.

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5

Min, Daomin, Chenyu Yan, Rui Mi, Chao Ma, Yin Huang, Shengtao Li, Qingzhou Wu, and Zhaoliang Xing. "Carrier Transport and Molecular Displacement Modulated dc Electrical Breakdown of Polypropylene Nanocomposites." Polymers 10, no. 11 (October 30, 2018): 1207. http://dx.doi.org/10.3390/polym10111207.

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Dielectric energy storage capacitors have advantages such as ultra-high power density, extremely fast charge and discharge speed, long service lifespan and are significant for pulsed power system, smart power grid, and power electronics. Polypropylene (PP) is one of the most widely used dielectric materials for dielectric energy storage capacitors. It is of interest to investigate how to improve its electrical breakdown strength by nanodoping and the influencing mechanism of nanodoping on the electrical breakdown properties of polymer nanocomposites. PP/Al2O3 nanocomposite dielectric materials with various weight fraction of nanoparticles are fabricated by melt-blending and hot-pressing methods. Thermally stimulated current, surface potential decay, and dc electrical breakdown experiments show that deep trap properties and associated molecular chain motion are changed by incorporating nanofillers into polymer matrix, resulting in the variations in conductivity and dc electrical breakdown field of nanocomposite dielectrics. Then, a charge transport and molecular displacement modulated electrical breakdown model is utilized to simulate the dc electrical breakdown behavior. It is found that isolated interfacial regions formed in nanocomposite dielectrics at relatively low loadings reduce the effective carrier mobility and strengthen the interaction between molecular chains, hindering the transport of charges and the displacement of molecular chains with occupied deep traps. Accordingly, the electrical breakdown strength is enhanced at relatively low loadings. Interfacial regions may overlap in nanocomposite dielectrics at relatively high loadings so that the effective carrier mobility decreases and the interaction between molecular chains may be weakened. Consequently, the molecular motion is accelerated by electric force, leading to the decrease in electrical breakdown strength. The experiments and simulations reveals that the influence of nanodoping on dc electrical breakdown properties may origin from the changes in the charge transport and molecular displacement characteristics caused by interfacial regions in nanocomposite dielectrics.

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6

Novák, Ján. "Electrical Prope Rties of Popcorn Grains." Acta Technologica Agriculturae 16, no. 2 (June 1, 2013): 43–46. http://dx.doi.org/10.2478/ata-2013-0011.

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Abstract This work contains the results of measuring the electrical properties of popcorn grains. Interest in electrical properties of biological materials resulted in engineering research in this field. The results of measurements are used for determining the moisture content, the surface level of liquid and grainy materials, for controlling the presence of pests in grain storage, for a quantitative determination of mechanical damage, in applications of dielectric heating, and in many other cases. Electrical measurements on these materials are of fundamental importance in relation to the analysis of quantity of absorbed water and dielectric heating characteristics. It is a well-known fact that electrical properties of materials, namely dielectric constant and conductivity, are affected by the moisture content of material. This fact is important for the design of many commercial moisture-testing instruments for agricultural products. The knowledge of dielectric properties of materials is necessary for the application of dielectric heating. The aim of this work was to perform the measurements of conductivity, dielectric constant and loss tangent on samples of popcorn grains, the electrical properties of which had not been sufficiently measured. Measurements were performed under variable moisture content and the frequency of electric field in the range from 1 MHz to 16 MHz, using a Q meter with a coaxial probe. It was concluded that conductivity, dielectric constant and loss tangent increased with increase of moisture content, and dielectric constant and loss factor decreased as the frequency of electric field increased.

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7

Toman, Manar S., and Sameer Hassan Al-nesrawy. "New Fabrication (PVA-CMC -PbO) Nanocomposites Structural and Electrical Properties." NeuroQuantology 19, no. 4 (May 18, 2021): 38–46. http://dx.doi.org/10.14704/nq.2021.19.4.nq21035.

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This paper presents the work conducted on preparing (PbO PVA-PEG) nanocomposites through adding the different weight concentrations of lead oxide (0,1,3,5,7 wt%). The structural aspects such as optical microscope, FTIR and electrical features of nanocomposites (PVA-CMC/PbO) were examined. The resulting data shows that the dielectric constant decreased along with the decline of dielectric loss, whereas the frequency value rose while applying of an electric field. As for the electrical conductivity AC, the dielectric loss and dielectric constant of all samples rose along with the increase in lead oxide concentration.

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8

Peng, Cheng, Yefeng Feng, and Jianbing Hu. "Enhancing High-Frequency Dielectric Properties of Beta-SiC Filled Nanocomposites from Synergy between Percolation and Polarization." Materials 11, no. 9 (September 13, 2018): 1699. http://dx.doi.org/10.3390/ma11091699.

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Promising comprehensive properties, including high permittivity, low dielectric loss, high breakdown strength, low electrical conductivity, and high thermal conductivity, are very hard to simultaneously obtain in high-frequency applicable polymer nanocomposite dielectrics. Instead of traditional electric percolation, in this work, a novel route based on a synergy between electric percolation and induced polarization has been raised to prepare 0–3 type nanocomposites with an enhanced high permittivity (high-k) property and low loss at high frequency. This work aimed at optimizing that synergy to achieve the favorable properties mentioned above in composite dielectrics used at high frequencies such as 1 MHz and 1 GHz. Conductive beta-SiC nanoparticles with a particle size of ~30 nm were employed as filler and both insulating poly(vinyl alcohol) and polyvinyl chloride were employed as polymer matrices to construct two composite systems. Utilizing polyvinyl chloride rather than poly(vinyl alcohol) realizes higher comprehensive electrical properties in composites, ascribed to optimization of that synergy. The optimization was achieved based on a combination of mild induced polarization and polarization-assisted electric percolation. Therefore, this work might open the way for large-scale production of high-frequency applicable composite dielectrics with competitive comprehensive electrical properties.

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9

RATHEE, KANTA, and B. P. MALIK. "STRUCTURAL AND ELECTRICAL PROPERTIES OF TANTALUM PENTAOXIDE (Ta2O5) THIN FILMS – A REVIEW." International Journal of Modern Physics: Conference Series 22 (January 2013): 564–69. http://dx.doi.org/10.1142/s2010194513010672.

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Down scaling of complementary metal oxide semiconductor transistors has put limitations on silicon dioxide to be used as an effective dielectric. It is necessary to replace the SiO 2 with a physically thicker layer of oxides of high dielectric constant. Thus high k dielectrics are used to suppress the existing challenges for CMOS scaling. Many new oxides are being evaluated as gate dielectrics such as Ta2O5 , HfO2 , ZrO2 , La2O3 , HfO2 , TiO2 , Al2O3 , Y2O3 etc but it was soon found that these oxides in many respects have inferior electronic properties to SiO2 . But the the choice alone of suitable metal oxide with high dielectric constant is not sufficient to overcome the scaling challenges. The various deposition techniques and the conditions under which the thin films are deposited plays important role in deciding the structural and electrical properties of the deposited films. This paper discusses in brief the various deposition conditions which are employed to improve the structural and electrical properties of the deposited films.

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10

Roland, C. M. "ELECTRICAL AND DIELECTRIC PROPERTIES OF RUBBER." Rubber Chemistry and Technology 89, no. 1 (March 1, 2016): 32–53. http://dx.doi.org/10.5254/rct.15.84827.

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ABSTRACT This review describes electrical and dielectric measurements of rubbery polymers. The interest in the electrical properties is primarily due to the strong effect of conductive fillers, the obvious example being carbon black. Conductivity measurements can be used to probe dispersion and the connectivity of filler particles, both of which exert a significant influence on the mechanical behavior. Dielectric relaxation spectra are used to study the dynamics, including the local segmental dynamics and secondary relaxations, and for certain polymers the global chain modes. A recent development in the application of nonlinear dielectric spectroscopy is briefly discussed.

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11

Kim, Hui Eun, Sung Yun Lee, and Sang-Im Yoo. "Improved Electrical Properties of BaTiO3 – coated CaCu3Ti4O12 Dielectrics." MRS Proceedings 1454 (2012): 75–80. http://dx.doi.org/10.1557/opl.2012.1233.

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ABSTRACTWe report a significant improvement in the electrical properties of CaCu3Ti4O12 (CCTO) dielectrics by the BaTiO3 (BTO) additive. The addition of BTO to CCTO was performed using two different methods of a solid-state mixing and a sol-gel coating. Compared with pure CCTO ceramics (εr ∼ 52,000 and tanδ ∼ 0.38 at 100 kHz), BTO-added CCTO samples commonly showed a large improvement in the dielectric loss property although their dielectric constants were depressed around one order of magnitude; εr ∼ 5900 and tanδ ∼0.05 for 5 mol% BTO-coated CCTO sample and εr ∼ 4,075 and tanδ ∼ 0.02 for 5 mol% BTO-mixed CCTO sample. In addition, BTO-coated CCTO samples showed relatively lower leakage current than those of BTO-mixed CCTO samples, implying that the sol-gel coating is more effective for improving the electrical properties of CCTO.

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12

Najeeb, Hussein Neama. "Dielectrical and electrical properties of PVA-NaI composites." Iraqi Journal of Physics (IJP) 11, no. 22 (February 20, 2019): 56–63. http://dx.doi.org/10.30723/ijp.v11i22.353.

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The electrical characteristics of polyvinyl alcohol PVA doped with different concentrations (0, 1, 2, 3 and 4wt%) of sodium iodide NaI powder were studied. The films are prepared using solution casting technique, in order to investigate the effect of sodium iodide NaI additions on the electrical properties of PVA host. The D.C conductivity measured by measuring the D.C electrical resistance using the Keithly Electrometer type 616C, and for different temperatures ranging from 30 – 70oC. The dielectric properties measured by measuring the capacitor and the loss angle tangent as a function of the alternating electric field frequency using the Agilent impedance analyzer 4294A, within the frequency range 50 – 6 ×106 Hz at room temperature. The experimental results showed that the dielectric constant is decrease with increase frequency of applied electrical field and increase with increasing concentrations, dielectric loss is increase with increasing frequency of applied electrical field to be 1MHz after this it was decreasing, A.C electrical conductivity are increasing with increasing frequency of applied electrical field, also, the results showed that the D.C electrical conductivity are increasing with increase concentration of NaI and temperature, activation energy are decreasing with increase concentration of additive salt.

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13

Sagadevan, Suresh, and Priya Murugasen. "Electrical Properties of Copper Oxide Nanoparticles." Journal of Nano Research 30 (March 2015): 1–8. http://dx.doi.org/10.4028/www.scientific.net/jnanor.30.1.

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Copper Oxide (CuO) nanoparticles were synthesized by the wet chemical method. The crystal structure and grain size of the particles were determined, using X-ray diffraction (XRD). The particle size and morphology were studied using the scanning electron microscope (SEM). The dielectric properties of CuO nanoparticles were carried out at different temperatures. The variation of the dielectric constant and dielectric loss were studied. The dielectric constants of the CuO nanoparticles are high at low frequencies, and decrease rapidly when the frequency is increased. Further, electronic properties like valence electron plasma energy, Penn gap, Fermi energy and electronic polarizability of the CuO nanoparticles, were estimated.

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14

Sahu, Kriti Ranjan, and Udayan De. "Dielectric Properties of Rhombohedral PbNb2O6." Journal of Solid State Physics 2013 (November 7, 2013): 1–9. http://dx.doi.org/10.1155/2013/451563.

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Dielectric materials are needed in many electrical and electronic applications. So, basic characterizations need to be done for all dielectrics. PbNb2O6 (PN) is ferroelectric and piezoelectric only in its orthorhombic phase, with potential high temperature applications. So, its rhombohedral phase, frequently formed as an undesirable impurity in the preparation of orthorhombic PN, has been ignored with respect to possible dielectric characterizations. Here, essentially single phase rhombohedral PN has been prepared, checking structure from XRD Rietveld Analysis, and the real and imaginary parts of permittivity measured in an Impedance Spectrometer (IS) up to ~700∘C and over 20 Hz to 5.5 MHz range, for heating and some cooling runs. Variations, with temperature, of relaxation time constant (τ), AC and DC conductivity, bulk resistance, activation energy and capacitance have been explored from our IS data.

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15

Novák, Ján. "Electric Properties Measurement of Lentil." Acta Technologica Agriculturae 21, no. 1 (March 1, 2018): 18–23. http://dx.doi.org/10.2478/ata-2018-0004.

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AbstractThis paper contains the results of the electric properties measurement of lentil set. Electric measurements with use of these materials are of fundamental importance in relation to the analysis of quantity of absorbed water and dielectric heating characteristics. The aim of this paper was to perform the measurements of conductivity, dielectric constant and loss tangent on samples of lentil, the electrical properties of which had not been sufficiently measured. Measurements were performed under various moisture contents, and the frequency of electric field ranged from 1 MHz to 16 MHz, using a Q meter with coaxial probe. It was concluded that conductivity, relative permittivity and loss tangent increased with an increase in moisture content, and dielectric constant and loss tangent decreased as the frequency of electric field increased.

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16

Ahmed, M. A., and M. A. El Hiti. "Electrical and Dielectric Properties of Zn0.8Co0.2Fe2O4." Journal de Physique III 5, no. 6 (June 1995): 775–81. http://dx.doi.org/10.1051/jp3:1995103.

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17

Tuncer, E., Y. V. Serdyuk, and S. M. Gubanski. "Dielectric mixtures: electrical properties and modeling." IEEE Transactions on Dielectrics and Electrical Insulation 9, no. 5 (October 2002): 809–28. http://dx.doi.org/10.1109/tdei.2002.1038664.

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18

Zelenskiy, Vladimir I., and Pavel E. Troyan. "Properties moulded thin-film nanostructure." Yugra State University Bulletin 11, no. 2 (June 15, 2015): 53–57. http://dx.doi.org/10.17816/byusu201511253-57.

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Are considered: technology of reception of thin-film frame metal-dielectric-metal; the properties got by frame as a result of electrical moulding in strong electric field in vacuo: volt-ampere characteristic, issue of electrons in vacuum. The model of resulting electrical moulding of nanostructure is discussed.

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19

Buketov, Andriy, Serhii Smetankin, Eduard Lysenkov, Kyrylo Yurenin, Oleksandr Akimov, Serhii Yakushchenko, and Iryna Lysenkova. "Electrophysical Properties of Epoxy Composite Materials Filled with Carbon Black Nanopowder." Advances in Materials Science and Engineering 2020 (July 21, 2020): 1–7. http://dx.doi.org/10.1155/2020/6361485.

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The effect of carbon black (CB) nanopowder on the electrical properties of polymer composite systems based on the epoxy resin is investigated using the method of impedance spectroscopy. It is established that the electrical and dielectric properties of the studied systems significantly depend on the nanofiller content. It is found that electrical conductivity and dielectric constant exhibit percolation behavior when the filler’s content increases. In this case, the electrical conductivity increases exponentially, indicating the formation of filler electrically conductive mesh inside the polymer matrix. A small jump in electrical conductivity when reaching the percolation threshold indicates the formation of indirect contacts between the particles. The value of the percolation threshold of conductivity is 8%. It is shown that the dielectric constant of epoxy nanosystems is almost unchanged in the frequency range of 102–105 Hz. It is related to the structural features of the filler particles, which ensure the existence of a minimal dielectric gradient between the matrix and the filler. It is found that the dielectric constant of the studied systems also shows percolation behavior. The obtained material based on the epoxy matrix is characterized by a high value of dielectric constant, which at a carbon black nanopowder content of 29% is 4680. This material is characterized by relative frequency invariance and a high value of dielectric constant, so it has great potential for practical application.

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20

Dąbrowski, Jaroslaw, Seiichi Miyazaki, S. Inumiya, G. Kozłowski, G. Lippert, G. Łupina, Y. Nara, Hans Joachim Müssig, A. Ohta, and Y. Pei. "The Influence of Defects and Impurities on Electrical Properties of High-k Dielectrics." Materials Science Forum 608 (December 2008): 55–109. http://dx.doi.org/10.4028/www.scientific.net/msf.608.55.

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Electrical properties of thin high-k dielectric films are influenced (or even governed) by the presence of macroscopic, microscopic and atomic-size defects. For most applications, a structurally perfect dielectric material with moderate parameters would have sufficiently low leakage and sufficiently long lifetime. But defects open new paths for carrier transport, increasing the currents by orders of magnitude, causing instabilities due to charge trapping, and promoting the formation of defects responsible for electrical breakdown events and for the failure of the film. We discuss how currents flow across the gate stack and how damage is created in the material. We also illustrate the contemporary basic knowledge on hazardous defects (including certain impurities) in high-k dielectrics using the example of a family of materials based on Pr oxides. As an example of the influence of stoichiometry on the electrical pa-rameters of the dielectric, we analyze the effect of nitrogen incorporation into ultrathin Hf silicate films.

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21

Bunoiu, Madalin, Eugen Mircea Anitas, Gabriel Pascu, Larisa Marina Elisabeth Chirigiu, and Ioan Bica. "Electrical and Magnetodielectric Properties of Magneto-Active Fabrics for Electromagnetic Shielding and Health Monitoring." International Journal of Molecular Sciences 21, no. 13 (July 6, 2020): 4785. http://dx.doi.org/10.3390/ijms21134785.

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An efficient, low-cost and environmental-friendly method to fabricate magneto-active fabrics (MAFs) based on cotton fibers soaked with silicone oil and iron oxide microfibers (mFe) at mass fractions 2 wt.%, 4 wt.% and 8 wt.% is presented. It is shown that mFe induce good magnetic properties in MAFs, which are subsequently used as dielectric materials for capacitor fabrication. The electrical properties of MAFs are investigated in a static magnetic field with intensities of 0 kA/m, 160 kA/m and 320 kA/m, superimposed on a medium-frequency electric field. The influence of mFe on the electrical capacitance and dielectric loss tangent is determined, and it can be observed that the electrical conductivity, dielectric relaxation times and magnetodielectric effects are sensibly influenced by the applied magnetic and electric fields. The results indicate that the MAFs have electrical properties which could be useful for protection against electromagnetic pollution or for health monitoring.

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22

Hassan, Dalal, and Ahmed Hashim. "Synthesis of (Poly-methyl Methacrylate-lead Oxide) Nanocomposites and Studying their A.C Electrical Properties for Piezoelectric Applications." Bulletin of Electrical Engineering and Informatics 7, no. 4 (December 1, 2018): 547–51. http://dx.doi.org/10.11591/eei.v7i4.969.

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Piezoelectric materials have been prepared from (poly-methyl methacrylate-lead oxide) nanocomposites for electronic applications. The lead oxide nanoparticles were added to poly-methyl methacrylate by different concentrations are (4, 8, and 12) wt%. The structural and dielectric properties of nanocomposites were studied. The results showed that the dielectric constant and dielectric loss of nanocomposites decrease with increase in frequency of applied electric field. The A.C electrical conductivity increases with increase in frequency. The dielectric constant, dielectric loss and A.C electrical conductivity of poly-methyl methacrylate increase with increase in lead oxide nanoparticles concentrations. The results of pressure sensor showed that the electrical resistance of (PMMA-PbO2) nanocomposites decreases with increase in pressure.

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23

Naimzad, Aref, Yousef Hojjat, and Mojtaba Ghodsi. "Porous and Nonporous Film-Shaped Magnetorheological Nanocomposites: Dielectric and Electrical Properties." Smart Materials Research 2014 (December 1, 2014): 1–5. http://dx.doi.org/10.1155/2014/764303.

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This paper presents a brief experimental comparative study on electrical and dielectric properties of two sets of porous and nonporous MRNCs, each including five samples of film-shaped magnetorheological nanocomposites (MRNCs) based on room temperature vulcanized (RTV) silicone rubber and nanosized carbonyl iron particles (CIPs). The electrical and dielectric properties of porous and nonporous MRNCs were measured at five different filler concentrations. Several experiments were performed to measure the volume resistivity, dielectric constant, and dielectric loss. The MRNCs dielectric properties were analysed with respect to the parameters like frequency and CIPs loadings. The electrical conductivity was studied in terms of volume resistivity. The comparative investigation suggests the porous MRNCs for smart and light-weighted structures those benefits from a lower electrical property, dielectric losses, and dielectric constants.

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24

Rathee, Kanta, Mukesh Kumar, and B. P. Malik. "The Structural and Electrical Properties of Ta₂O₅ Thin Films Prepared by DC Sputtering Method." Key Engineering Materials 500 (January 2012): 317–21. http://dx.doi.org/10.4028/www.scientific.net/kem.500.317.

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Recently both, electrical and material properties of tantalum oxide (Ta2O5) have been found to be useful for microelectronics and optoelectronics devices. The need of higher permittivity of dielectric material attracts more attention towards the tantalum oxide thin films. To ensure good electrical performance of the resulting device DC sputtering technique has been used for depositing Ta2O5 films. In the present work, the potential of Ta2O5 thin films as a high K dielectric for CMOS devices has been studied. Physical characteristics of the Ta2O5 dielectrics were investigated with x-ray diffraction and electrical properties were measured by capacitance-voltage (C-V) analysis. The interface state density of 1* 10 11 cm-2 eV-1 have been achieved for 50 nm Ta2O5 film. The calculated value of dielectric constant of as deposited Ta2O5 oxide film was found to be 29. This Ta2O5 dielectric shows promise for future generation of CMOS devices.

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25

DAI, HONGJIE, ALI JAVEY, ERIC POP, DAVID MANN, WOONG KIM, and YUERUI LU. "ELECTRICAL TRANSPORT PROPERTIES AND FIELD EFFECT TRANSISTORS OF CARBON NANOTUBES." Nano 01, no. 01 (July 2006): 1–13. http://dx.doi.org/10.1142/s1793292006000070.

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This paper presents a review on our recent work on carbon nanotube field effect transistors, including the development of ohmic contacts, high-κ gate dielectric integration, chemical functionalization for conformal dielectric deposition and pushing the performance limit of nanotube FETs by channel length scaling. Due to the importance of high current operations of electronic devices, we also review the high field electrical transport properties of nanotubes on substrates and in freely suspended forms. Owing to their unique properties originating from their crystalline 1D structure and the strong covalent carbon–carbon bonding configuration, carbon nanotubes are highly promising as building blocks for future electronics. They are found to perform favorably in terms of ON-state current density as compared to the existing silicon technology, owing to their superb electron transport properties and compatibility with high-κ gate dielectrics. Future directions and challenges for carbon nanotube-based electronics are also discussed.

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26

He, Gang, Jiangwei Liu, Hanshuang Chen, Yanmei Liu, Zhaoqi Sun, Xiaoshuang Chen, Mao Liu, and Lide Zhang. "Interface control and modification of band alignment and electrical properties of HfTiO/GaAs gate stacks by nitrogen incorporation." J. Mater. Chem. C 2, no. 27 (2014): 5299–308. http://dx.doi.org/10.1039/c4tc00572d.

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Effects of nitrogen incorporation on the interface chemical bonding states, optical dielectric function, band alignment, and electrical properties of sputtering-derived HfTiO high-kgate dielectrics on GaAs substrates have been studied by angle resolved X-ray photoemission spectroscopy (ARXPS), spectroscopy ellipsometry (SE), and electrical measurements.

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27

Tan, Daniel Qi, Yang Cao, Xiaomei Fang, and Patricia C. Irwin. "Tunable Nanodielectric Composites." Advances in Materials Science and Engineering 2014 (2014): 1–6. http://dx.doi.org/10.1155/2014/549275.

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This paper presents a progress update with the development of nanodielectric composites with electric field tunability for various high energy, high power electrical applications. It is demonstrated that nonlinear electrical/dielectric properties can be achieved via the nanostructure and interface engineering. A high level summary was given on the progress achieved as well as challenges remaining in nanodielectric engineering towards high energy density capacitors for energy storage and conversion, nonlinear dielectrics for tunable device, and high voltage varistor for surge suppression.

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28

ZUO, ZHI-GAO, FU-RI LING, DAN LI, JIN-SONG LIU, and JIAN-QUAN YAO. "THE EFFECT OF ELECTRIC FIELD ON THE DIELECTRIC PERMITTIVITY OF BST/STO SUPERLATTICE." Modern Physics Letters B 27, no. 10 (March 26, 2013): 1350066. http://dx.doi.org/10.1142/s0217984913500668.

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A nonlinear thermodynamic model is developed for investigating the effect of external electric field on the dielectric properties of Ba 0.6 Sr 0.4 TiO 3/ SrTiO 3( BST / STO ) super-lattice. The transformation strain induced by the external electrical field are analyzed and calculated. It is found that the dielectric and ferroelectric properties of the ( BST / STO ) superlattice vary substantially with the interlayer elastic interaction caused by the external electrical field. The results also provide better understanding of the dielectric behavior of BST / STO superlattice with external electric field and a necessary step in the development of the general nonlinear theory.

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29

Du, Bin, Jian Li, Feipeng Wang, Wei Yao, and Shuhan Yao. "Influence of Monodisperse Fe3O4Nanoparticle Size on Electrical Properties of Vegetable Oil-Based Nanofluids." Journal of Nanomaterials 2015 (2015): 1–9. http://dx.doi.org/10.1155/2015/560352.

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Insulating oil modified by nanoparticles (often called nanofluids) has recently drawn considerable attention, especially concerning the improvement of electrical breakdown and thermal conductivity of the nanofluids. In this paper, three sized monodisperse Fe3O4nanoparticles were prepared and subsequently dispersed into insulating vegetable oil to achieve nanofluids. The dispersion stability of nanoparticles in nanofluids was examined by natural sedimentation and zeta potential measurement. The electrical breakdown strength, space charge distribution, and several dielectric characteristics, for example, permittivity, dielectric loss, and volume resistivity of these nanofluids, were comparatively investigated. Experimental results show that the monodisperse Fe3O4nanoparticles not only enhance the dielectric strength but also uniform the electric field of the nanofluids. The depth of electrical potential well of insulating vegetable oils and nanofluids were analyzed to clarify the influence of nanoparticles on electron trapping and on insulation improvement of the vegetable oil.

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30

Duran, Alicia, JoséR Jurado, and JoséM Fernandez Navarro. "Electrical properties of copper phosphate glasses II. Dielectric properties." Journal of Non-Crystalline Solids 79, no. 3 (February 1986): 353–66. http://dx.doi.org/10.1016/0022-3093(86)90233-4.

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31

Nayak, Amrita, S. K. Patri, P. L. Deepti, and B. Behera. "Electrical and Magnetic Properties of Pb0.8La0.2Fe0.1Cr0.1Ti0.8O3." Integrated Ferroelectrics 201, no. 1 (September 2, 2019): 43–54. http://dx.doi.org/10.1080/10584587.2019.1668689.

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The dielectric spectroscopy of a new ceramic material; Pb0.8La0.2Fe0.1Cr0.1Ti0.8O3 has been studied. The compound was prepared by solid-state reaction method. The structural study from X-ray diffraction technique shows the formation of polycrystalline sample with orthorhombic crystal system at room temperature. Dielectric property of this material has been characterized in the temperature range of 25–450°C and frequency range of 100 Hz – 1 MHz respectively. The phase transition temperatures were at two different temperatures for each frequency. The nature of ac conductivity shows the negative temperature coefficient of resistance type behavior of the material.

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32

Afqir, Mohamed, Amina Tachafine, Didier Fasquelle, Mohamed Elaatmani, Jean-Claude Carru, Abdelouahad Zegzouti, Mohamed Daoud, and Abdelhamid Oufakir. "Structure and electrical properties of Eu-doped SrBi2Nb2O9 ceramics." Processing and Application of Ceramics 13, no. 3 (2019): 281–86. http://dx.doi.org/10.2298/pac1903281a.

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Structure and dielectric properties of Eu-doped SrBi2Nb2O9 ceramics (with 0, 20 and 35 at.% of Eu), prepared by the solid-state method and sintering, were investigated. XRD, FTIR and SEM measurements were provided to validate the characteristic structural features of the obtained ceramics. For all samples, the orthorhombic structure was identified through XRD analysis. SEM results confirmed that the fabricated samples have relatively dense structure with rod- and plate-like grains typical for Aurivillius layered structures. Dielectric results showed that the doping with Eu decreases dielectric constant and reduces dielectric loss. Movement of the dielectric peak towards higher temperatures appearing at about 400?C with increase of frequency indicates on relaxor behaviour of the sample with 35 at.% of Eu.

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33

Barot, Dharmishtha, and Deepti Tripathi. "Dielectric and Electrical Studies of PMMA and PVP in Polar Solvents." Solid State Phenomena 209 (November 2013): 133–36. http://dx.doi.org/10.4028/www.scientific.net/ssp.209.133.

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The dielectric and electric properties of poly (methyl Methacrylate) (PMMA) and Poly (vinyl Pyrrolidione) (PVP) in polar solvent have been studied in the frequency range of 20 Hz to 2 MHz at room temperature. The effect of polar solvent environment on the dielectric and electrical parameters such as the complex dielectric constant (Є*), relaxation times complex electrical modulus (M*) and complex impedance (Z*) has been analysed . Dielectric dispersion curves show that the polymer concentration plays an important role in governing its segmental motion in solvent solution. At low frequencies, the ionic conduction and electrode polarization seems to have dominant influence on the large increase of complex dielectric constant values.

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34

Mekap, Anita, Piyush R. Das, and R. N. P. Choudhary. "Dielectric And Electrical Properties Of ZnSb2O4 Ceramics." Advanced Materials Letters 5, no. 3 (March 1, 2014): 152–56. http://dx.doi.org/10.5185/amlett.2013.fdm.65.

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35

Das, Piyushranjan, Anita Mekap, and R. N. P. Choudhary. "Dielectric and Electrical Properties of LaGaO3 Ceramics." JOURNAL OF ADVANCES IN PHYSICS 3, no. 2 (December 5, 2013): 212–19. http://dx.doi.org/10.24297/jap.v3i2.2074.

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LaGaO3 â€based perovskite oxides doped with Sr and Mg exhibit high ionic conductivity over a wide range of oxygen partial pressure and found to be very stable in reducing, oxidizing, and CO2 atmospheres. In this study, the polycrystalline sample of LaGaO3 was prepared by a high-temperature solid-state reaction technique. Preliminary X-ray diffraction (XRD) studies of powder sample of LaGaO3 showed the formation of single-phase compound at room temperature. The surface morphology of the pellet sample of LaGaO3 was recorded at room temperature using a scanning electron microscope (SEM). Detailed studies of dielectric properties (Îµr, tan Î´) and impedance parameters of the material provide an insight into the electrical properties and understanding of types of relaxation process occurred in the material. Temperature variation of dc conductivity shows that this compound exhibits negative temperature coefficient of resistance (NTCR) and frequency dependence of ac conductivity suggests that the material obeys Jonschera's universal power law.

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36

Pethig, Ronald. "Dielectric and Electrical Properties of Biological Materials." Journal of Bioelectricity 4, no. 2 (January 1985): vii—ix. http://dx.doi.org/10.3109/15368378509033258.

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37

Wang, Weitian, Baolong Xu, Ping Gao, Wei Zhang, and Yuming Sun. "Electrical and dielectric properties of HoMnO3 ceramics." Solid State Communications 177 (January 2014): 7–9. http://dx.doi.org/10.1016/j.ssc.2013.09.022.

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38

Abdel-Aziz, M. M., M. A. Afifi, H. H. Labib, and E. G. El-Metwally. "Electrical and Dielectric Properties of Amorphous Ge1Se1.35TL0.1Films." Acta Physica Polonica A 98, no. 4 (October 2000): 393–99. http://dx.doi.org/10.12693/aphyspola.98.393.

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39

Uhm, Han S. "Electrical discharge properties in dielectric-loaded diodes." Physics of Plasmas 7, no. 11 (November 2000): 4770–73. http://dx.doi.org/10.1063/1.1310620.

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40

Rao, S. Ramchandar, K. J. Pratap, and V. Hari Babu. "Dielectric and Electrical Properties of InSe Films." Crystal Research and Technology 21, no. 7 (July 1986): 913–18. http://dx.doi.org/10.1002/crat.2170210724.

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41

Ali, A. I., and Insuk Yu. "Dielectric, thermal and electrical properties of NH4HCO3." Ferroelectrics 262, no. 1 (January 2001): 179–82. http://dx.doi.org/10.1080/00150190108225146.

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42

Agasiev, A. A., M. Z. Mamedov, and M. B. Muradov. "Electrical Conductivity and Dielectric Properties of Bi4Ti3O12." Journal de Physique III 6, no. 7 (July 1996): 853–61. http://dx.doi.org/10.1051/jp3:1996159.

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43

El Hiti, M. A. "Electrical and Dielectric Properties of NixMg1-xFe2O4." Journal de Physique III 6, no. 10 (October 1996): 1307–13. http://dx.doi.org/10.1051/jp3:1996188.

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44

Khetre, S. M., A. U. Chopade, C. J. Khilare, H. V. Jadhav, P. N. Jagadale, and S. R. Bamane. "Electrical and dielectric properties of nanocrystalline LaCrO3." Journal of Materials Science: Materials in Electronics 24, no. 11 (July 31, 2013): 4361–66. http://dx.doi.org/10.1007/s10854-013-1411-z.

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45

El Bachiri, A., F. Bennani, and M. Bousselamti. "Dielectric and electrical properties of LiNbO3 ceramics." Journal of Asian Ceramic Societies 4, no. 1 (March 2016): 46–54. http://dx.doi.org/10.1016/j.jascer.2015.11.006.

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46

Wang, H. G., and H. Herman. "Plasma-sprayed cordierite: Dielectric and electrical properties." Surface and Coatings Technology 37, no. 3 (June 1989): 297–303. http://dx.doi.org/10.1016/0257-8972(89)90110-2.

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47

Sahoo, M. P. K., N. Kumar, and R. N. P. Choudhary. "Structural, dielectric and electrical properties of LiBaFeWO6." Journal of Alloys and Compounds 478, no. 1-2 (June 2009): 49–53. http://dx.doi.org/10.1016/j.jallcom.2008.12.009.

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48

Das, P. R., S. Behera, R. Padhee, P. Nayak, and R. N. P. Choudhary. "Dielectric and electrical properties of Na2Pb2La2W2Ti4Ta4O30 electroceramics." Journal of Advanced Ceramics 1, no. 3 (September 2012): 232–40. http://dx.doi.org/10.1007/s40145-012-0024-y.

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49

Patri, S. K., R. N. P. Choudhary, and B. K. Samantaray. "Dielectric and electrical properties of Bi9Fe5Ti4O29 nanoceramics." Journal of Alloys and Compounds 459, no. 1-2 (July 2008): 333–37. http://dx.doi.org/10.1016/j.jallcom.2007.04.240.

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50

Jadli, T., Y. Moualhi, A. Mleiki, H. Rahmouni, K. Khirouni, and A. Cheikhrouhou. "Electrical and dielectric properties of Sm0.55Sr0.45MnO3 compound." Journal of Solid State Chemistry 302 (October 2021): 122378. http://dx.doi.org/10.1016/j.jssc.2021.122378.

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