Relevant bibliographies by topics / Ceramic materials - Electric properties

Academic literature on the topic 'Ceramic materials - Electric properties'

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Published: 4 June 2021
Last updated: 10 February 2022

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Journal articles on the topic "Ceramic materials - Electric properties"

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Sachidhananda, T. G., and V. Adake Chandrashekhar. "Electric Discharge Machining of Conducting Ceramics - A Review." Materials Science Forum 1019 (January 2021): 121–28. http://dx.doi.org/10.4028/www.scientific.net/msf.1019.121.

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Electrical Discharge machining (EDM) is a nonconventional machining technique, which has been widely used to produce dies and mold. Harder Materials can be machined into complex shapes as long as they conduct electricity. Recent advances in the technologies brought the development of new engineering materials, which are hard to machine with traditional machining processes. Being one of these materials, ceramics possess some unique properties like piezoelectricity and tribological properties which are not found in metal and polymers. EDM is capable of machining these ceramics, given these materials have an adequately high electrical conductivity. Preparing conducting ceramics is pre-requisite for incorporating ceramics in EDM. Different techniques such as compaction, tape casting, extrusion, injection molding and slip casting are used form green ceramic body. These green bodies are subsequently sintered to obtain ceramic parts. Adding conducting elements in the ceramics while processing results in conducting ceramics. These additions increase hardness but fracture toughness of body is compromised. Ceramic parts can also be machined by using assisting electrode and pyrolytic carbon technique. This paper discusses the various methods of shaping conducting ceramics and its machining characteristics for EDM application
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Tang, H., Y. J. Feng, Z. Xu, C. H. Zhang, and J. Q. Gao. "Effect of Nb doping on microstructure and electric properties of lead zirconate stannum titanate antiferroelectric ceramics." Journal of Materials Research 24, no. 5 (May 2009): 1642–45. http://dx.doi.org/10.1557/jmr.2009.0202.

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The aim of this work is to study the effect of Nb element doping on the microstructure and electrical properties of lead zirconate stannum titanate (PZST) ceramic and to improve phase transition properties of PZST. Nb-doped Pb(Zr,Sn,Ti)O3 ceramic samples were prepared by the conventional mixed oxide method. Phase transitions induced by temperature, pressure, and electric field were measured with electric dielectric permittivity, hydrostatic pressure, and hysteresis. The microstructure of the samples was observed by electron scanning microscope to discuss the effect of Nb doping on PZST ceramics. The experiment results indicated that the remnant polarization (Pr), dielectric constant, phase transition, and microstructure were strongly dependent on Nb doping content.
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Suastiyanti, Dwita, Yuli Nurul Maulida, and Merlin Wijaya. "Improving of Electric Voltage Response Based on Improving of Electrical Properties for Multiferroic Material of BiFeO3-BaTiO3 System." Key Engineering Materials 867 (October 2020): 54–61. http://dx.doi.org/10.4028/www.scientific.net/kem.867.54.

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Synthesis of nanomultiferroic material with the active content of bismuth ferrite (BiFeO3) and barium titanate (BaTiO3) was carried out. It is considering that it was difficult to obtain single phase of BiFeO3 as a base material for multiferroic materials. It is expected that the addition of BaTiO3 on ceramic alloys consist of BiFeO3 and BaTiO3 can improve the electrical properties of the ceramics and finally it improves the multiferroic properties of the material. Multiferroic properties could be seen from the appearance of an electric voltage response if the material is given the effect of an external magnetic field. The synthesis uses the sol gel method which is a good method of producing nanosized material. Synthesis of nanomultiferroic ceramic materials is carried out by varying the weight ratio of BaTiO3 and BiFeO3 of 2: 1, calcination temperature of 350°C for 4 hours and sintering temperatures with variations of 700°C; 750°C and 800°C for 2; 4; and 6 hours. Characterization was carried out using X Ray Diffraction (XRD) to confirm phase formation. The electrical properties test which produces a hysterical loop is carried out to determine the value of remanent, coercivity and electric polarization saturation. Particle size measurements were carried out using the Beckman Coulter DelsaTM nanoinstrument. The multiferroic phenomena is known from the appearance of an electric voltage response if there is an effect of an external magnetic field on the material. The smallest particle size was obtained on ceramic powder which experienced sintered of 750°C. The best values of remanent, coercivity and electric polarization​​ were obtained on ceramics which were sintered at temperatures of 750°C for 6 hours. This is linear with the highest value of electrical voltage arising as a result of the effect of the external magnetic field given to the ceramic material. Material that has a large electrical voltage response shows good multiferroic properties.
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Deng, Yunfeng, Junjun Wang, Chunxiao Zhang, Hui Ma, Chungeng Bai, Danqing Liu, Fengmin Wu, and Bin Yang. "Structural and Electric Properties of MnO2-Doped KNN-LT Lead-Free Piezoelectric Ceramics." Crystals 10, no. 8 (August 15, 2020): 705. http://dx.doi.org/10.3390/cryst10080705.

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Structural, ferroelectric, dielectric, and piezoelectric properties of K0.5Na0.5NbO3-LiTaO3-xmol%MnO2 lead-free piezoelectric ceramics with 0.0 ≤ x ≤ 0.3 were studied. The ceramic samples were synthesized through the conventional solid-state reaction method. The MnO2 addition can reduce the sintering temperature of KNLNT ceramics. Compared with undoped KNLNT ceramic, the piezoelectric measurements showed that piezoelectric properties of K0.5Na0.5NbO3-LiTaO3-xMnO2 were improved (d33 = 251 pC/N) when x = 0.1. In addition, KNLNT-xMnO2 ceramics have larger Pr(20.59~21.97 μC/cm2) and smaller Ec(10.77~6.95 kV/cm), which indicates MnO2 has excellent softening property, which improves the ferroelectric properties of KNLNT ceramics This work adds relevant information regarding of potassium sodium niobate K0.5Na0.5NbO3 (KNN) when doped Li, Ta, Mn at the B-site.
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Savvova, O. V., G. K. Voronov, S. A. Ryabinin, E. Yu Fedorenko, and V. D. Timofeev. "Alumina silicate glass-ceramic materials for electrical purposes." Scientific research on refractories and technical ceramics 120 (December 30, 2020): 174–85. http://dx.doi.org/10.35857/2663-3566.120.17.

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The prospects for use of glass-ceramic materials as electrical products were analyzed. The priority of a self-organized macro- and nanostructure formation of the glass-ceramic materials under conditions of low-temperature heat treatment to ensure their high physical and chemical properties was shown. The choice of an alumina silicate system of materials for obtaining high-strength glass-ceramic materials with improved electrical properties was substantiated, taking into account the aspects of energy saving. The technological modes of cooking, forming and heat treatment of glass-ceramic materials were determined. Resistance, dielectric constant and dielectric loss tangent at 106 Hz were measured using an E6-13A teraometer on a trielectrode system at a temperature of +29 °C and a DE-5000 RLC meter. Electric strength (Em) and cold crushing strength were determined according to GOST 24409-80. Tensile strength according to GOST 32281.1-2013 (EN 1288-1: 2000). The decisive influence on the electrical properties of glass-ceramic materials the crystalline phases of α-cordierite, β-spodumene or lithium disilicate, as well as the residual glass phase composition has been established. The structure influence of the alumina silicate glass-ceramic materials on the provision of their electrical (tgδ∙104 = 70 ÷ 80; ε = 8.0 ÷ 9.3 (at f = 106 Hz); lg ρv = 12.9 ÷ 15.0 (ρv, Ohm·cm at Т = 20 °C) and mechanical (K1C = 3.15 ÷ 4.3 МPа∙м1/2; σ comp = 630 ÷ 700 МPа, σbend = 300 ÷ 350 МPа; KCU = 4.8 ÷ 5.9 kJ/m2) properties. It was found that, the defining condition for the developed glass-ceramic materials use as insulating materials under repeated exposure to high-temperature operations is their high breakdown strength Em = 37 ÷ 42 MV/m and thermal shock resistance due to low TCLE (α∙107 = 21.5 ÷ 31.8 deg-1). The influence of phase composition and structure of the alumina silicate glass-ceramic materials on their electrical and mechanical properties was analyzed. A comparative assessment of the known ceramic and glass-ceramic materials for electrical purposes has made it possible to establish the feasibility of using the developed materials as substrates in the design of a hybrid integrated circuit, vacuum-tight shell and capacitor dielectrics.
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Zhang, Jing, Pinghua Pan, Ping Jiang, Jie Qin, and Jiansong Hu. "Electric degradation in PZT piezoelectric ceramics under a DC bias." Science and Engineering of Composite Materials 27, no. 1 (December 31, 2020): 464–68. http://dx.doi.org/10.1515/secm-2020-0049.

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AbstractIn order to accurately evaluate the service life and failure mechanism of the PZT piezoelectric ceramics, the electric degradation process of the PZT ceramics with and sans doping under a DC voltage of 380V, in a surrounding environment of 90∘C and 85% RH has been investigated using a self-made device. The experimental results show that the degradation rate of the pure PZT ceramic is lower than that of ceramics with doping in the same condition. Furthermore, the electrical properties of the ceramics tend to decrease during the electric degradation. The doping increases the defects of ceramics, resulting in that the silver ion transfer from the anode to the cathode under the continuous DC bias, which can further form a metal band, increasing the conductivity, but deteriorating the service life.
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Molak, A., and J. Suchanicz. "Electric properties of ceramic Na0.5Bi0.5TiO3under axial pressure." Ferroelectrics 189, no. 1 (December 1996): 53–59. http://dx.doi.org/10.1080/00150199608213404.

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Albutt, Naphat, Suejit Pechprasarn, and Thanapong Sareein. "Influence of Currents and Electric Fields in YNMO Ceramics." Applied Mechanics and Materials 866 (June 2017): 256–58. http://dx.doi.org/10.4028/www.scientific.net/amm.866.256.

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Development of ceramic materials is critical for new and improved electronic applications. Herein, the J-E response of Y2NiMnO6 (YNMO) ceramics composited by a solid state reaction method was investigated. Sintering temperature and time were found to have significant influence on the ceramics electrical properties. In particular, higher temperatures and longer sintering times resulted in more favourable dielectric properties of the YNMO ceramics. A current of 40 mA/cm2 at 20,000 mV/cm was obtained by sintering at 1300 °C for 12 hours, whereas a current of 9 mA/cm2 at 4000 mV/cm can be achieved by sintering at 1400 °C for 24 hours. These results will be useful for identifying applications for YNMO ceramics. The electrical properties of the YNMO ceramics can be tuned for different electronic components such as dry batteries and capacitors.
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Bochenek, Dariusz, Joanna A. Bartkowska, Lucjan Kozielski, and Izabela Szafraniak-Wiza. "Mechanochemical Activation and Spark Plasma Sintering of the Lead-Free Ba(Fe1/2Nb1/2)O3 Ceramics." Materials 14, no. 9 (April 27, 2021): 2254. http://dx.doi.org/10.3390/ma14092254.

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This paper investigates the impact of the technological process (Mechanochemical Activation (MA) of the powder in combination with the Spark Plasma Sintering (SPS) method) on the final properties of lead-free Ba(Fe1/2Nb1/2)O3 (BFN) ceramic materials. The BFN powders were obtained for different MA duration times (x from 10 to 100 h). The mechanically activated BFN powders were used in the technological process of the BFN ceramics by the SPS method. The measurements of the BFNxMA ceramic samples included the following analysis: Scanning Electron Microscopy (SEM), Energy Dispersive Spectrometry (EDS), DC electrical conductivity, and dielectric properties. X-ray diffractions (XRD) tests showed the appearance of the perovskite phase of BFN powders after 10 h of milling time. The longer milling time (up 20 h) causes the amount of the perovskite phase to gradually increase, and the diffraction peaks are more clearly visible. Short high energy milling times favor a large heterogeneity of the grain shape and size. Increasing the MA milling time to 40 h significantly improves the microstructure of BFN ceramics sintered in the SPS technology. The microstructure becomes fine-grained with clearly visible grain boundaries and higher grain size uniformity. Temperature measurements of the BFN ceramics show a number of interesting dielectric properties, i.e., high values of electric permittivity, relaxation properties with a diffusion phase transition, as well as negative values of dielectric properties occurring at high temperatures. The high electric permittivity values predestines the BFNxMA materials for energy storage applications e.g., high energy density batteries, while the negative values of dielectric properties can be used for shield elements against the electromagnetic radiation.
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Mitić, Vojislav V., Zoran S. Nikolić, Ivona Mitrović, Branka Jordović, and Vladimir Brankov. "THE APPLICATION OF STEREOLOGY METHOD FOR ESTIMATING THE NUMBER OF 3D BaTiO3 – CERAMIC GRAINS CONTACT SURFACES." Image Analysis & Stereology 20, no. 3 (May 3, 2011): 231. http://dx.doi.org/10.5566/ias.v20.p231-237.

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Methods of stereological study are of great importance for structural research of electronic ceramic materials including BaTiO3-ceramic materials. The broad application of ceramics, based on barium-titanate, in advanced electronics nowadays demands a constant research of its structure, that through the correlation structureproperties, a fundamental in the basic materials properties prognosis triad (technology-structure-properties), leads to further prognosis and properties design of these ceramics. Microstructure properties of BaTiO3- ceramic material, expressed in grains' boundary contact, are of basic importance for electric properties of this material, particularly the capacity. In this paper, a significant step towards establishing control under capacitive properties of BaTiO3-ceramics is being done by estimating the number of grains contact surfaces. Defining an efficient stereology method for estimating the number of BaTiO3-ceramic grains contact surfaces, we have started from a mathematical model of mutual grains distribution in the prescribed volume of BaTiO3-ceramic sample. Since the real microstructure morphology of BaTiO3-ceramics is in some way disordered, spherical shaped grains, using computer-modelling methods, are approximated by polyhedra with a great number of small convex polygons. By dividing the volume of BaTiO3-ceramic sample with the definite number of parallel planes, according to a given pace, into the intersection plane a certain number of grains contact surfaces are identified. According to quantitative estimation of 2D stereological parameters the modelled 3D internal microstructure is obtained. Experiments were made by using the scanning electronic microscopy (SEM) method with the ceramic samples prepared under pressing pressures up to 150 MPa and sintering temperature up to 1370°C while the obtained microphotographs were used as a base of confirming the validity of presented stereology method. This paper, by applying computer stereology method for estimating the number of grains contact surfaces, makes possible a further insight into the microstructure of BaTiO3-ceramics with the final aim to design new properties of electronic materials based on barium - titanate ceramics.
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Dissertations / Theses on the topic "Ceramic materials - Electric properties"

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Papageorge, Marc Vasilios. "Characterization of metal/ceramic interfaces on aluminum nitride." Thesis, Georgia Institute of Technology, 1989. http://hdl.handle.net/1853/9352.

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Kokan, Julie Runyan. "Microstructure/electrical property correlations in ceramic matrix composites." Diss., Georgia Institute of Technology, 1998. http://hdl.handle.net/1853/19594.

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Yang, Fan. "Electrical and thermal properties of yttria-stabilised zirconia (YSZ)- based ceramic materials." Thesis, University of Manchester, 2011. https://www.research.manchester.ac.uk/portal/en/theses/electrical-and-thermal-properties-of-yttriastabilised-zirconia-ysz-based-ceramic-materials(82568afe-ffcb-4a38-9166-e5de83337763).html.

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Electrical and thermal conductivities of the yttria-stabilised zirconia/alumina (YSZ/Al2O3) composites and the yttria-zirconia-ceria (YSZ-CeO2) solid solutions are studied in this thesis. The electrical conductivity of the YSZ/Al2O3 composites decreases with an increase in the volume fraction of Al2O3 and exhibits typical percolation behaviour. The electrical conductivity of the YSZ/Al2O3 interface is higher than that of the YSZ grain boundary, but lower than that of the YSZ grains. The thermal conductivity of the YSZ/Al2O3 composites increases with an increase in the Al2O3 volume fraction, and it can be fitted well to the Maxwell theoretical model, which indicates the absence of obvious interfacial thermal resistances in the composites. The low interfacial thermal resistance of the YSZ/Al2O3 interface is due to the 'clean' and coherent nature of the YSZ/Al2O3 interface, along with the small difference between the elastic properties of YSZ and Al2O3. The electrical conductivity of the [(ZrO2)1-x(CeO2)x]0.92(Y2O3)0.08 (0 ≤ x ≤ 1) solid solutions has a 'V-shape' variation as a function of the mole ratio of CeO2 (x). In the ZrO2-rich region (x < 0.5), CeO2 doping increases the concentration of defect associates which limits the mobility of the oxygen vacancies; in the CeO2-rich region (x > 0.5), the increase of x increases the lattice parameter, which enlarges the free channel for oxygen vacancy migration. A comparison of the YSZ-CeO2 solid solutions with the YSZ-HfO2 series indicates the ionic radius of the tetravalent dopant determines the composition dependence of the ionic conductivity of the solid solutions.The thermal conductivity of the [(ZrO2)1-x(CeO2)x]0.92(Y2O3)0.08 (0 ≤ x ≤ 1) solid solutions also has a 'V-shape' variation as a function of the mole ratio of CeO2 (x), which indicates an incorporation of Zr4+ and Ce4+ can effectively decrease the thermal conductivity of the end members YSZ and yttria-doped ceria (YDC). In the ZrO2-rich region (0 ≤ x ≤ 0.5), the thermal conductivity is almost temperature independent; in the CeO2-rich region (0.5 ≤ x ≤ 1), it decreases obviously with increasing temperature. By calculating the phonon scattering coefficients, it is concluded that the composition dependence of the thermal conductivity in the ternary solid solutions is dominated by the mass difference between Zr and Ce at the cation sites, whereas the temperature dependence is determined by the order/disorder of oxygen vacancies at the anion sites.
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Mansour, Rabih. "Mode I Interlaminar Fracture Properties of Oxide and Non-Oxide Ceramic Matrix Composites." University of Akron / OhioLINK, 2017. http://rave.ohiolink.edu/etdc/view?acc_num=akron1494248628194216.

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Darvish, Shadi. "Thermodynamic Investigation of La0.8Sr0.2MnO3±δ Cathode, including the Prediction of Defect Chemistry, Electrical Conductivity and Thermo-Mechanical Properties." FIU Digital Commons, 2018. https://digitalcommons.fiu.edu/etd/3653.

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Fundamental thermodynamic investigations have been carried out regarding the phase equilibria of La0.8Sr0.2MnO3±δ (LSM), a cathode of a solid oxide fuel cell (SOFC), utilizing the CALculation of PHAse Diagram (CALPHAD) approach. The assessed thermodynamic databases developed for LSM perovskite in contact with YSZ fluorite and the other species have been discussed. The application of computational thermodynamics to the cathode is comprehensively explained in detail, including the defect chemistry analysis as well as the quantitative Brouwer diagrams, electronic conductivity, cathode/electrolyte interface stability, thermomechanical properties of the cathode and the impact of gas impurities, such as CO2 as well as humidity, on the phase stability of the cathode. The quantitative Brouwer diagrams for LSM at different temperatures are developed and the detailed analysis of the Mn3+ charge disproportionation behavior and the electronic conductivity in the temperature range of 1000-1200°C revealed a good agreement with the available experimental observations. The effects of temperature, CO2 partial pressure, O2 partial pressure, humidity level and the cathode composition on the formation of secondary phases have been investigated and correlated with the available experimental results found in the literature. It has been indicated that the CO2 exposure does not change the electronic/ionic carriers’ concentration in the perovskite phase. The observed electrical conductivity drop is predicted to occur due to the formation of secondary phases such as LaZr2O7, SrZrO3, SrCO3 and Mn oxides at the LSM/YSZ interface, resulting in the blocking of the electron/ion transfer paths. For the thermo-mechanical properties of LSM, a new weight loss Mechanism for (La0.8Sr0.2)0.98MnO3±δ using the La-Sr-Mn-O thermodynamic database is modeled with respect to the compound energy formalism model. This newly proposed mechanism comprehensively explains the defect formation as a result of volume/weight change during the thermal cycles. According to the proposed mechanism the impact of cation vacancies regarding the volume change of cathode was explained.
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Wagner, Michael Christopher. "An Investigation of the Optical and Physical Properties of Lead Magnesium Niobate-Lead Titanate Ceramic." University of Dayton / OhioLINK, 2020. http://rave.ohiolink.edu/etdc/view?acc_num=dayton1608306745644145.

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Almansour, Amjad Saleh Ali. "USE OF SINGLE TOW CERAMIC MATRIX MINICOMPOSITES TO DETERMINE FUNDAMENTAL ROOM AND ELEVATED TEMPERATURE PROPERTIES." University of Akron / OhioLINK, 2017. http://rave.ohiolink.edu/etdc/view?acc_num=akron148640184494135.

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SILVA, PAULO S. M. da. "Projeto, construção e testes de um sistema de medidas elétricas e estudo de compósitos de zircônia-ítria e nitreto de titânio." reponame:Repositório Institucional do IPEN, 2015. http://repositorio.ipen.br:8080/xmlui/handle/123456789/25318.

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Dissertação (Mestrado em Tecnologia Nuclear)
IPEN/D
Instituto de Pesquisas Energeticas e Nucleares - IPEN-CNEN/SP
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Zapata, Angélica Maria Mazuera. "Processamento e propriedades do sistema ferroelétrico (Li,K,Na)(Nb,Ta)O3 dopado com CuO." Universidade Federal de São Carlos, 2015. https://repositorio.ufscar.br/handle/ufscar/5071.

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The search for new lead-free piezoelectric materials has been a major goal of many scientists in recent years. The main cause is the replacement of widely used lead zirconate titanate (PZT) based ceramics due to the highly toxic characteristics of the lead element. Potassium sodium niobate based ceramics have shown high piezoelectric coefficients and a morphotropic phase boundary close to the composition (K0.5Na0.5)NbO3 (KNN), similar to that found in lead zirconate titanate. However, the preparation of highly dense KNN based ceramics is extremely difficult. In this work, the structural, mechanical and electrical properties of lead free ferroelectric ceramics with compositions Li0,03(K0,5Na0,5)0,97Nb0,8Ta0,2O3 + xwt% CuO (x = 0; 2 and 3.5) were studied. All the compositions, sintered at 1050ºC for 2 hours had high density, approximately 95% of the theoretical value. Rietveld refinement of the X ray diffraction patterns showed a mixture of both orthorhombic Bmm2 and tetragonal P4mm phases, for all compositions. Nevertheless, compositions with high CuO contents have mainly the tetragonal phase. Dielectric and dynamic mechanical analysis (DMA) measurements showed two polymorphic phase transitions with increasing temperature. Both phase transitions have diffuse character and they can be related with the transformation of the orthorhombic phase fraction in the tetragonal one, and with the transformation of the tetragonal ferroelectric phase to a cubic paraelectric one. The origin of the difference observed between the temperatures where both techniques, dielectric and mechanical, see the diffuse phase transition is discussed. The ceramic with 2wt% of CuO is electrically softer than the other compositions and it has the highest value of the piezoelectric coefficient d31. Also, in this work we studied the possibility of using high contents of CuO to promote the formation of liquid phase for obtaining and extracting single crystal seeds, which can be used for the texture of KNN-based ceramics. The ceramic Li0,03(Na0,5K0,5)0,97Ta0,2Nb0,8O3 + x wt% CuO with x=16, sintered at 1090ºC for 2 hours, is a perfect candidate for extracting grains which may be used as seeds. Furthermore, ceramics with x=13, sintered at 1110ºC for 2 hours, showed a partial melting of the material, which caused the growth of highly oriented grains. This material can be practically considered as a single crystal and, with a proper cut procedure, the desired single crystal seeds can be obtained. This method to obtain single crystal seeds, as proposed in this work, is very simple and novelty.
Nos últimos anos, o foco principal de muitos cientistas tem sido a procura de novos materiais piezoelétricos livres de chumbo. A causa principal é a substituição dos materiais baseados em titanato zirconato de chumbo (PZT), os quais são amplamente utilizados em aplicações piezoelétricas, devido à alta toxicidade do elemento chumbo. Cerâmicas baseadas em niobato de sódio e potássio têm mostrado altos coeficientes piezoelétricos e um contorno de fases morfotrópico próximo da composição (K0.5Na0.5)NbO3 (KNN), similar ao encontrado no titanato zirconato de chumbo. Porém, a preparação de cerâmicas baseadas em KNN com alta densidade é extremamente dificultosa. Neste trabalho foram estudadas as propriedades estruturais, mecânicas e elétricas de cerâmicas ferroelétricas livres de chumbo com composições Li0,03(K0,5Na0,5)0,97Nb0,8Ta0,2O3 + x %P CuO (x = 0; 2 e 3,5). Todas as cerâmicas sinterizadas a 1050ºC durante 2 horas apresentaram altas densidades, sendo aproximadamente 95% da densidade teórica. O refinamento pelo método de Rietveld dos perfis de difração de raios X mostrou que todas as composições apresentam uma mistura de ambas as fases, ortorrômbica Bmm2 e tetragonal P4mm. Porém, composições com altos teores de CuO apresentam a fase tetragonal como sendo majoritária. As medidas dielétricas e as de análise mecânico dinâmico (DMA) mostraram duas transições de fase polimórficas com o aumento da temperatura. Ambas transições de fase têm caráter difuso e estão relacionadas com a transformação da fração de fase ortorrômbica em tetragonal e com a transformação da fase tetragonal ferroelétrica para cúbica paraelétrica. Foi discutida a origem da diferença observada, nas temperaturas em que ambas as técnicas, dielétrica e mecânica, enxergam a transição de fase difusa. A cerâmica com 2%P de CuO mostrou-se mais mole eletricamente e apresentou um valor maior de coeficiente piezoelétrico d31 do que as outras composições estudadas. Também, neste trabalho foi estudada a possibilidade de usar altos teores de CuO para promover a formação de fase líquida e conseguir a formação e extração de sementes monocristalinas que possam ser utilizadas na textura de cerâmicas baseadas em KNN. A cerâmica de Li0,03(Na0,5K0,5)0,97Ta0,2Nb0,8O3 + x % P CuO com x=16, sinterizada a 1090ºC durante 2 horas, mostrou-se a candidata perfeita para a extração de grãos que possam ser utilizados como sementes. Por outro lado, a cerâmica com x=13, sinterizada a 1110ºC durante 2 horas, apresentou fusão parcial de material, o que promoveu o crescimento dos grãos altamente orientados de forma que esse material já pode ser considerado como sendo praticamente um monocristal e com um procedimento de corte adequado, podem ser obtidas as sementes monocristalinas desejadas. Esse procedimento de obtenção de sementes monocristalinas, proposto neste trabalho, é totalmente simples e inovador.
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COSTA, FRANCINE A. da. "Sintese e sinterizacao de pos compositos do sistema W-Cu." reponame:Repositório Institucional do IPEN, 2004. http://repositorio.ipen.br:8080/xmlui/handle/123456789/11176.

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Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)
Tese (Doutoramento)
IPEN/T
Instituto de Pesquisas Energeticas e Nucleares - IPEN/CNEN-SP
FAPESP:00/00255-9
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Books on the topic "Ceramic materials - Electric properties"

1

1951-, Zhang Jusheng, and Deng Kangqing, eds. Xi tu gai xing dao dian tao ci cai liao. Beijing Shi: Guo fang gong ye chu ban she, 2009.

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Japan) Asian Meeting on Electroceramics (6th 2008 Tsukuba-shi. Asian ceramic science for electronics III and electroceramics in Japan XII: Proceedings of the 6th Asian Meeting on Electroceramics and the 28th Electronics Division Meeting of the Ceramic Society of Japan, Tsukuba, Japan, October 22-24, 2008. Stafa-Zurich: Trans Tech, 2010.

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Nihon Seramikkusu Kyōkai. Electronics Division. Meeting. Electroceramics in Japan XIII: Selected, peer reviewed papers of the 29th Electronics Division Meeting of the Ceramics Society of Japan, Tokyo, Japan, October 23-24 2009. Stafa-Zurich: Trans Tech, 2010.

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Nihon Seramikkusu Kyōkai. Electronics Division. Meeting. Electroceramics in Japan XVI: Selected, peer reviewed papers from the 32nd Electronics Division Meeting of the Ceramic Society of Japan, October 26-27, 2012, Tokyo, Japan. Durnten-Zurich], Switzerland: Trans Tech Publications, 2014.

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Denmark) Risø International Symposium on Materials Science (32nd 2011 Roskilde. Composite materials for structural performance: Towards higher limits : proceedings of the 32nd Risø International Symposium on Materials Science, 5-9 September 2011. Edited by Fæster S. Roskilde, Denmark: Risø National Laboratory for Sustainable Energy, Technical University of Denmark, 2011.

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Abraham, Thomas. Piezoelectric ceramic, ceramic/polymer composite and polymer materials: Technology, applications, industry structure and markets. Norwalk, CT: Business Communications Co., 2000.

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Asian Meeting on Electroceramics (2nd 2001 Kawasaki-shi, Japan). Asian ceramic science for electronics II: Proceedings of the 2nd Asian Meeting on Electroceramics, Kawasaki, Japan, October 2001. Uetikon-Zuerich, Switzerland: Trans Tech Publications, 2002.

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Nihon Seramikkusu Kyōkai. Electronics Division. Meeting. Electroceramics in Japan XI: Proceedings of the 27th Electronics Division Meeting of the Ceramic Society of Japan, Tokyo, Japan, October 18-19, 2007. Switzerland: Trans Tech Publications, 2009.

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International Meeting on Modern Ceramics Technologies (12th 2010 Montecatini Terme, Italy). Advances in electrical and magnetic ceramics: 12th International Ceramics Congress, Part F : proceedings of the 12th International Ceramics Congress, part of CIMTEC 2010--12th International Ceramics Congress and 5th Forum on New Materials, Montecatini Terme, Italy, June 6-11, 2010. Stafa-Zuerich: Trans Tech Pub. Ltd., on behalf of Techna Group, 2011.

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Chŏng, Hŏn-saeng. Yŏnso panŭngpŏp e ŭihan chŏnyŏlgwan ŭi seramik pʻibok kisul kaebal =: Ceramic lining of pipe for electric heating by combustion reaction process : chʻoejong pogosŏ. [Seoul]: Sanŏp Chawŏnbu, 2006.

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Book chapters on the topic "Ceramic materials - Electric properties"

1

Ramdani, Noureddine. "Electrical Properties of Polymer/Ceramic Composites." In Polymer and Ceramic Composite Materials, 193–238. Boca Raton : Taylor & Francis, CRC Press, 2019.: CRC Press, 2019. http://dx.doi.org/10.1201/b22371-8.

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Hwang, Seongjin, Dongsun Kim, and Hyungsun Kim. "Thermal Properties of Materials at Interfaces for Electronic Application." In Ceramic Transactions Series, 157–64. Hoboken, NJ, USA: John Wiley & Sons, Inc., 2010. http://dx.doi.org/10.1002/9780470917145.ch24.

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Henrich, Victor E. "Electron Spectroscopic Determination of the Electronic, Geometric and Chemisorption Properties of Oxide Surfaces." In Surfaces and Interfaces of Ceramic Materials, 1–28. Dordrecht: Springer Netherlands, 1989. http://dx.doi.org/10.1007/978-94-009-1035-5_1.

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He, Haifeng, Wei Cai, Rongli Gao, Gang Chen, Xiaoling Deng, and Chunlin Fu. "Effects of Sintering Temperature on Microstructure, Electric Properties of Ba0.7Sr0.3TiO3 Ceramics." In Advanced Functional Materials, 587–98. Singapore: Springer Singapore, 2018. http://dx.doi.org/10.1007/978-981-13-0110-0_65.

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Sato, Shigeki, Yoshinori Fujikawa, and Takeshi Nomura. "Relationship Between Microstructure and Electrical Properties in Various Rare-Earth Doped BME Materials." In Ceramic Transactions Series, 77–88. Hoboken, NJ, USA: John Wiley & Sons, Inc., 2012. http://dx.doi.org/10.1002/9781118408186.ch9.

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Yu, Jun Suh, Sung Park, Jae Chun Lee, In Sup Hahn, and Sang Kuk Woo. "Electrical and Thermal Properties of Carbon-Coated Porous Ceramic Fiber Composites." In Materials Science Forum, 370–73. Stafa: Trans Tech Publications Ltd., 2005. http://dx.doi.org/10.4028/0-87849-966-0.370.

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Ichinose, N., Y. Saigo, H. Sakamoto, Y. Hosono, and Y. Yamashita. "Preparation and Electrical Properties of Pb(In1/2 Nb1/2 )O3 Based Relaxor Materials." In Ceramic Transactions Series, 135–42. Hoboken, NJ, USA: John Wiley & Sons, Inc., 2012. http://dx.doi.org/10.1002/9781118380802.ch12.

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Fujimoto, Yoshitaka. "Structure, Stabilities, and Electronic Properties of Smart Ceramic Composites." In Sol-gel Based Nanoceramic Materials: Preparation, Properties and Applications, 113–31. Cham: Springer International Publishing, 2016. http://dx.doi.org/10.1007/978-3-319-49512-5_4.

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Wang, Fengqi, Hai Zhang, Wei Cai, Rongli Gao, and Chunlin Fu. "Microstructure and Electric Properties of (Sr1−xCax)3Sn2O7 Ceramics with Ruddlesden-Popper Structure." In Advanced Functional Materials, 189–97. Singapore: Springer Singapore, 2018. http://dx.doi.org/10.1007/978-981-13-0110-0_22.

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Vanpoucke, Danny E. P. "Doping OF CeO2as a Tunable Buffer Layer fo Coated Superconductors: A Dft Study of Mechanical and Electronic Properties." In Developments in Strategic Ceramic Materials, 169–77. Hoboken, NJ, USA: John Wiley & Sons, Inc., 2015. http://dx.doi.org/10.1002/9781119211747.ch14.

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Conference papers on the topic "Ceramic materials - Electric properties"

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Mukae, Kazuo, Koichi Tsuda, and Akinori Tanaka. "Effects of double Schottky barrier on the electric properties of ceramic semiconductors." In 3rd International Conference on Intelligent Materials, edited by Pierre F. Gobin and Jacques Tatibouet. SPIE, 1996. http://dx.doi.org/10.1117/12.237068.

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Niittymaki, Minna, Kari Lahti, Tomi Suhonen, and Jarkko Metsajoki. "Electric field dependency of dielectric behavior of thermally sprayed ceramic coatings." In 2015 IEEE 11th International Conference on the Properties and Applications of Dielectric Materials (ICPADM). IEEE, 2015. http://dx.doi.org/10.1109/icpadm.2015.7295318.

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Subba Reddy, B., B. Satish Naik, Udaya Kumar, and L. Satish. "Potential and electric field distribution in a ceramic disc insulator string with faulty insulators." In 2012 IEEE 10th International Conference on the Properties and Applications of Dielectric Materials (ICPADM). IEEE, 2012. http://dx.doi.org/10.1109/icpadm.2012.6318928.

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Liu, Yong, Ruiqing Chu, Zhijun Xu, Qian Chen, and Guorong Li. "Structure and electrical properties of (La,Ta)-doped (K0.5Na0.5)0.94Li0.06Nb0.95Ta0.05O3 ceramic." In Nanoscale Phenomena in Polar Materials. IEEE, 2011. http://dx.doi.org/10.1109/isaf.2011.6014003.

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Ahmadipour, Mohsen, Nik Akmar Rejab, Mohd Fariz Ab Rahman, Mohd Fadzil Ain, and Zainal Arifin Ahmad. "Structural, morphological and electrical properties of ZTA-La2O3 composite ceramic." In MATERIALS CHARACTERIZATION USING X-RAYS AND RELATED TECHNIQUES. Author(s), 2019. http://dx.doi.org/10.1063/1.5089389.

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Kulkarni, A. R., P. K. Patro, S. M. Gupta, and C. S. Harendranath. "Electrical properties of ferroelectric Sr0.5Ba0.5Nb2O6 ceramic materials synthesized by different techniques." In 2008 17th IEEE International Symposium on the Applications of Ferroelectrics (ISAF). IEEE, 2008. http://dx.doi.org/10.1109/isaf.2008.4693890.

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George, Aneesh, Jijimon K. Thomas, Annamma John, and Sam Solomon. "Electrical and dielectric properties of ZnO and CeO2 doped ZrTi2O6 ceramic." In OPTOELECTRONIC MATERIALS AND THIN FILMS: OMTAT 2013. AIP Publishing LLC, 2014. http://dx.doi.org/10.1063/1.4861994.

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Osman, Rosiah, Nor Hapishah Abdullah, Alaa Husain, Mohd Nizar Hamidon, Intan Helina Hasan, and Khamirul Amin Matori. "Dielectric properties of ceramic materials obtained from rice husk for electronic applications." In 2017 IEEE Regional Symposium on Micro and Nanoelectronics (RSM). IEEE, 2017. http://dx.doi.org/10.1109/rsm.2017.8069151.

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Babu, B. Vikram, M. Sushma Reddi, G. Chandana, A. Rama Krishna, N. Gna na Praveena, V. Kondala Rao, M. Tulu Wegayehu, et al. "Microstructural and electrical properties of Mg substituted Li4Ti5O12 synthesized by ceramic method." In INTERNATIONAL CONFERENCE ON MULTIFUNCTIONAL MATERIALS (ICMM-2019). AIP Publishing, 2020. http://dx.doi.org/10.1063/5.0019597.

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DeGiorgi, Virginia G., and Stephanie A. Wimmer. "Influence of Geometric Features and Material Orientation in Piezoelectric Ceramic Materials." In ASME 2005 International Mechanical Engineering Congress and Exposition. ASMEDC, 2005. http://dx.doi.org/10.1115/imece2005-79194.

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Abstract:
Orientation between loading and material property directions is a concern for both polycrystalline and single crystal piezoelectric materials. The design of devices fabricated from piezoelectric materials emphasizes alignment between principal actuation direction and a specific coupling coefficient direction. However, loading and actuation directions may not always be aligned. Complex component geometry, multiple loading types, multiple loading paths and fabrication tolerances may result in misalignment between mechanical loading direction, principal actuation direction, electrical loading direction and material property orientation. In this work a computational study is presented that examines the effects of off-axis loading as well as geometric features for piezoelectric ceramics. An ASTM dog-bone shaped tensile specimen is modified by the addition of cut-out features to provide geometry stress concentrations at various angles to the primary mechanical loading direction. Polycrystalline PZT-5A material properties are used. Mechanical loading is applied as in a standard tensile strength test. Electrical loading direction is aligned with the mechanical loading direction. The tensile specimen is also subjected to sequential mechanical and electrical loadings. In the initial condition the d33 axis is aligned with the mechanical loading direction of the tensile specimen. Additional runs are made after rotating the material axes away from the principal mechanical loading axes of the tensile specimen. Stress patterns and location of maximum stress levels, indicating initial failure sites, are discussed in terms of the complex relationship between geometric features, material orientation and loading condition.
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Reports on the topic "Ceramic materials - Electric properties"

1

Ching, Wai-Yim. Theoretical Studies on the Electronic Structures and Properties of Complex Ceramic Crystals and Novel Materials. Office of Scientific and Technical Information (OSTI), January 2012. http://dx.doi.org/10.2172/1033126.

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Grady, D. E. Dynamic properties of ceramic materials. Office of Scientific and Technical Information (OSTI), February 1995. http://dx.doi.org/10.2172/72964.

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Grady, D. E., and J. L. Wise. Dynamic properties of ceramic materials. Office of Scientific and Technical Information (OSTI), September 1993. http://dx.doi.org/10.2172/10187138.

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Guiochon, G. Study of the surface properties of ceramic materials by chromatography. Office of Scientific and Technical Information (OSTI), March 1992. http://dx.doi.org/10.2172/5474025.

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Guiochon, G. Study of the surface properties of ceramic materials by chromatography: Final report. Office of Scientific and Technical Information (OSTI), April 1995. http://dx.doi.org/10.2172/61204.

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Guiochon, G. Study of the surface properties of ceramic materials by chromatography. Final performance report. Office of Scientific and Technical Information (OSTI), March 1992. http://dx.doi.org/10.2172/10137351.

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7

Barland, David. Orthotropic Mechanical Properties of Uncoated and Ceramic-Coated Uniaxially-Compressed Carbon Cellular Porous Materials. Fort Belvoir, VA: Defense Technical Information Center, August 2001. http://dx.doi.org/10.21236/ada408549.

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8

Garboczi, Edward J. Finite element and finite difference programs for computing the linear electric and elastic properties of detail images of random materials. Gaithersburg, MD: National Institute of Standards and Technology, 1998. http://dx.doi.org/10.6028/nist.ir.6269.

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Conrad, Hans, Yusef Fahmy, and Di Yang. Enhanced Synthesis, Properties and Processing of Materials with Electric and Magnetic Fields. Saint Christopher Conference Held in Johns Island, South Carolina on May 16-19, 1999. Fort Belvoir, VA: Defense Technical Information Center, September 1999. http://dx.doi.org/10.21236/ada370108.

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