Dielectric Characterization
Mostrando 1-12 de 71 artigos, teses e dissertações.
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1. Cold sintering and electric characterization of ZnO-BaTiO3 composites
Abstract The sintering is an essential step in the processing of ceramics materials. A number of researchers have reported new techniques for sintering. However, in general, the process still demands high temperatures. This paper reports the results of the cold sintering of ZnO-BaTiO3 composites. The microstructural, structural, and electric properties of th
Cerâmica. Publicado em: 2021-03
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2. Characterization of the Dielectric Properties of the Tommy Atkins Mango
Abstract This paper presents the characterization of dielectric properties (dielectric permittivity and dielectric loss factor) of Tommy Atkins mango (Mangifera indica L), a fruit produced in several regions of Brazil, of great economic importance. The fruits were characterized according to their maturation index, by probe method, and identified by the yello
J. Microw. Optoelectron. Electromagn. Appl.. Publicado em: 2020-03
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3. Sixteenth-Mode Substrate-Integrated-Waveguide (SMSIW) Resonator for Dielectric Characterization of Liquid Mixtures
Abstract In this work, a new concept of planar resonator technique for measurement of liquid mixture permittivity is proposed, designed, and implemented using a Sixteen-Mode Substrate Integrated Waveguide (SMSIW) technology. To design the proposed sensor, the conventional SMSIW resonator is designed with an additional air hole on the open side, and then we a
J. Microw. Optoelectron. Electromagn. Appl.. Publicado em: 2020-03
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4. Plasma Treatment of Polyamide Fabric Surface by Hybrid Corona-Dielectric Barrier Discharge: Material Characterization and Dyeing/Washing Processes
In this study, the hybrid corona-dielectric barrier discharge plasma treatment was employed to modify the physical, chemical and morphological characteristics of a half-knitted fabric composed of 92% polyamide 6.6 and 8% elastane (PA). These properties of the fabric were evaluated by the water contact angle, x-ray diffraction, infrared spectroscopy, scanning
Mat. Res.. Publicado em: 28/11/2019
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5. Phase and microstructural analysis of NdTi0.8M0.2O3.4 (M = Al, Ga) microwave ceramics
ABSTRACT In this paper, we report the characterization of NdTi0.8M0.2O3.4 (M = Ga, Al) ceramics prepared via mixed oxide solid state sintering route. X-ray diffraction analysis of the samples revealed the formation of single phase for NdTi0.8Ga0.2O3.4 sample while secondary phase was formed in the case of NdTi0.8Al0.2O3.4. Microstructural analysis of the sam
Matéria (Rio J.). Publicado em: 25/11/2019
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6. Characterization of Algerian kaolins for utilization as a raw material in electrical insulators
Resumo O objetivo desta investigação foi caracterizar três amostras de caulim (DD1, DD2 e DD3) coletadas do depósito de Djebel Debbagh (leste da Argélia) para serem utilizadas em isoladores elétricos de porcelana. Análise granulométrica, fluorescência de raios X, difração de raios X, microscopia eletrônica de varredura e análise térmica (TG-ATD
Cerâmica. Publicado em: 06/06/2019
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7. Y3+ substituted Sr-hexaferrites: sol-gel synthesis, structural, magnetic and electrical characterization
Resumo Hexaferritas de estrôncio com adição de Y3+ com composição química SrYxFe12-xO19 (x= 0,0, 0,5, 1,0, 1,5) foram sintetizadas com sucesso pelo método sol-gel com autocombustão. Os estudos estruturais e morfológicos das amostras preparadas foram investigados usando a técnica de difração de raios X, espectroscopia de energia dispersiva, micros
Cerâmica. Publicado em: 06/06/2019
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8. Investigation of Thermal Effects in Coaxial Probe Method and Dielectric Characterization of Glycerol up to 140°C
Abstract Dielectric properties of a material are of paramount importance in many areas of knowledge. All scientific fields that deal with the interaction of electromagnetic radiation with matter demand this information. Consequently, suitable methods for obtaining accurate dielectric data are required. In the microwave community, the dielectric metrology wit
J. Microw. Optoelectron. Electromagn. Appl.. Publicado em: 2019-03
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9. Dielectric and electrical properties of a mullite/glass composite from a kaolinite clay/mica-rich kaolin waste mixture
Resumo Um compósito mulita/fase vítrea foi preparado por sinterização reativa de uma mistura argila caulinítica/resíduo de caulim rico em mica com 25% em massa de resíduo. A composição de fase, microestrutura, propriedades dielétricas e elétricas do compósito sinterizado a 1400 °C foram avaliadas por difração de raios X, microscopia eletrônic
Cerâmica. Publicado em: 2019-01
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10. Preparation and Characterization of Nickel ferrite Nanoparticles via Co-precipitation Method
Nickel ferrite (NiFe2O4) nanoparticles were synthesized using co-precipitation method. The X-ray diffraction (XRD) pattern was used to determine the structure of NiFe2O4 nanoparticles. The presence of NiFe2O4 nanoparticles was confirmed by the FT-IR spectrum. The details of the surface morphology of NiFe2O4 nanoparticles were obtained by Scanning Electron Mi
Mat. Res.. Publicado em: 22/01/2018
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11. Synthesis and Characterization of Non-Linear Optical Crystal of Manganese Mercury Thiocyanate Glycol Monomethyl Ether
The design and synthesis of organic nonlinear optical (NLO) crystals are a promising area of current research in materials science. Organic materials are found to possess better non linear optical properties when compared to inorganic materials. Recently, there has been a widespread interest in the metal-organic coordination compounds, which are a combinatio
Mat. Res.. Publicado em: 30/11/2017
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12. Synthesis, Characterization and Dielectric Properties of New 5-(4-Hydroxyphenyl)- 10,15,20-tri-4-[2-(3-pentadecylphenoxy)ethoxy]phenyl porphyrin and Their Ni, Co and Cu Complexes
New asymmetric cardanol-based porphyrins, free-base and coordinated with Ni, Co and Cu, were synthesized and completely characterized as A3B type. Such porphyrins were obtained aiming improved solubility in polar solvents due insertion of an -OH phenolic group. Their thermal and dielectric properties were also evaluated. Changes in the synthetic route reduce
J. Braz. Chem. Soc.. Publicado em: 2017-06