Journal ArticleDOI
Correlation Between Tolerance Factor and Temperature Coefficient of Dielectric Constant of (Ba,Sr)(Zn1/3Ta2/3)O3 Dielectric Resonator
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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
DiP230: Dielectric spectroscopy of some Ba(B′1/2B″1/2)O3 complex perovskites in the 1011–1014 Hz range
TL;DR: In this paper, the authors investigated the origin of microwave losses in O3 ceramic compounds and divided the submillimetre losses into intrinsic lattice losses (multiphonon absorption) proportional to temperature and extrinsic temperature independent loss contributions.
Journal ArticleDOI
Relation between intrinsic microwave and submillimeter losses and permitivity in dielectrics
TL;DR: In this article, low frequency losses in weakly anharmonic cubic centrosymmetric crystals as a function of permittivity are estimated using phonon kinetics approach, and the extrapolation down from the high-frequency one-phonon absorption range using a classical damped harmonic oscillator model is discussed.