Journal ArticleDOI
Correlation Between Tolerance Factor and Temperature Coefficient of Dielectric Constant of (Ba,Sr)(Zn1/3Ta2/3)O3 Dielectric Resonator
TLDR
In this article, the effect of substitution of Sr at the A site of Ba(Zn1/3Ta2/3)O3 was investigated with respect to tolerance factor (t) which determines the degree of packing of A and B site ions of perovskite unit cell, with an intension to understand the correlation between the temperature dependent dielectric properties with structure.Abstract:
The effect of substitution of Sr at the A site of Ba(Zn1/3Ta2/3)O3 was investigated with respect to tolerance factor (t) which determines the degree of packing of A and B site ions of perovskite unit cell, with an intension to understand the correlation between the temperature dependent dielectric properties with structure. The investigation reveals that the Ba rich compositions with highly symmetric cubic phase exhibits negative variation of dielectric constant with temperature and the Sr rich compositions with distorted structure always show positive variation of dielectric constant with temperature. The profile of τe variation of all the compositions was scaled with respect of reduced temperature which exhibits an exact signature of τe variation with the compositions at room temperature. The observed mechanism was explained using Clausius Mossoti equation.read more
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Journal ArticleDOI
Analysis and Evaluation of a Method of Measuring the Complex Permittivity and Permeability Microwave Insulators
TL;DR: In this article, a resonant post technique for characterizing dielectric and magnetic materials at microwave frequencies was proposed and experimental results of the temperature dependence of the relative dielectrics constant of nonmagnetic materials with /spl epsilon/sub r/, varying from 4 to 60, and also loss tangent measurements at room temperature.
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Dielectric and Structural Characteristics of Ba- and Sr-based Complex Perovskites as a Function of Tolerance Factor
TL;DR: In this paper, a relationship between dielectric permittivity and the tolerance factor (t) is proposed, and transmission electron microscopy is used to demonstrate examples of the structural modifications which cause the anomalies in τe at given values of t.
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Ba(Zn1/3Ta2/3)O3 Ceramics with Low Dielectric Loss at Microwave Frequencies
TL;DR: In this article, the dielectric properties at microwave frequencies of Ba(Zn1/3Ta2/3)O3 ceramics prepared by sintering were investigated.
Journal ArticleDOI
Temperature Dependence of Dielectric Constants of Cubic Ionic Compounds
A. J. Bosman,E. E. Havinga +1 more
TL;DR: In this paper, the temperature and pressure dependence of a number of cubic halides and oxides with a broad range of dielectric constants have been determined, and the experimental data have been used to calculate these different contributions.