Topic
Dielectric loss
About: Dielectric loss is a research topic. Over the lifetime, 20296 publications have been published within this topic receiving 349254 citations.
Papers published on a yearly basis
Papers
More filters
TL;DR: In this paper, the dielectric properties of the hexagonal perovskite oxides, La4BaTi4O15, La 4Ba2Ti5O18 and Ba5Nb4O5O15 have been characterized at microwave frequencies.
189 citations
TL;DR: In this article, the electromagnetic properties and microwave absorption of a series of ordered mesoporous carbon from different carbonization temperatures are investigated, and it is concluded that the degree of graphitization is the primary factor affecting the microwave absorbing properties of carbon materials.
189 citations
TL;DR: In this paper, the structures, phase transformations, and dielectric properties of pyrochlore ceramics containing bismuth were studied, and the relation between the orthorhombic and cubic pyroglores in the Bi2O3-ZnO-Nb2O5 (BZN) system was investigated.
Abstract: The structures, phase transformations, and dielectric properties of pyrochlore ceramics containing bismuth were studied. The relation between the orthorhombic and cubic pyrochlores in the Bi2O3-ZnO-Nb2O5 (BZN) system has been investigated. The effect of bismuth in distorted cubic pyrochlore structures is discussed. BZN compositions with pyrochlore structures have excellent dielectric properties, very low dielectric loss, and high dielectric constants with stable frequency and temperature dependence.
188 citations
TL;DR: In this article, the dielectric constants of CaF2, SrF2 and BaF2 single crystals were determined as a function of frequency from 102 to 106 (partly to 1010) cps, in the temperature range from −193° to 500°C.
Abstract: Dielectric constant κ′ and dielectric loss κ″ of CaF2, SrF2, and BaF2 single crystals were determined as a function of frequency from 102 to 106 (partly to 1010) cps, in the temperature range from –193° to 500°C. κ′ in all three crystals is frequency independent at 25°C. The dielectric loss κ″ varies only slightly with frequency, having the greatest values at lowest and highest frequencies. The temperature has a striking effect on κ′ and κ″. κ′ increases continuously from 6.4, 6.1, and 6.9 (extrapolated values at absolute zero) to 8.07, 7.70, and 8.46 at 500°C at frequencies above 106 cps for CaF2, SrF2, and BaF2, respectively. Below about 25°C, κ′ is frequency‐independent; at higher temperatures it increases with decreasing frequency, κ″ increases with temperature exponentially and decreases with frequency. A detailed interpretation of the frequency and temperature influence on κ′ and κ″ is given. Using expansion and density variation with temperature, a separation of electronic from atomic and dipolar contributions was made. The total dielectric constant is subdivided into six terms (three electronic and three atomic).
188 citations
TL;DR: In this article, split-post dielectric resonators operating at frequencies 1.4-5 GHz were used to measure complex permittivity of single-crystal reference materials with well known dielectrics properties previously measured by other techniques.
Abstract: Split-post dielectric resonators operating at frequencies 1.4–5.5 GHz were used to measure complex permittivity of single crystal standard reference dielectric materials with well known dielectric properties previously measured by other techniques. Detailed error analysis of permittivity and dielectric loss tangent measurements has been performed. It was proved both theoretically and experimentally that using split post resonators it is possible to measure permittivity with uncertainty about 0.3% and dielectric loss tangent with resolution 2×10 −5 for well-machined laminar specimens.
188 citations