Journal ArticleDOI
Dielectric relaxation in BaTi0.85(Fe1∕2Nb1∕2)0.15O3 perovskite ceramic
TLDR
In this paper, a polycrystalline sample of BaTi0.15O3 is synthesized by high temperature solid state reaction technique and the dielectric properties have been investigated at temperature range from 80to450K at various frequencies (100-107Hz).Abstract:
A polycrystalline sample of BaTi0.85(Fe1∕2Nb1∕2)0.15O3 is synthesized by high temperature solid state reaction technique. This sample crystallizes in cubic pervoskite structure at room temperature. The dielectric properties have been investigated at temperature range from 80to450K at various frequencies (100–107Hz). Frequency dielectric dispersion phenomena in a BaTi0.85(Fe1∕2Nb1∕2)0.15O3 ceramic has been analyzed by impedance spectroscopy in the temperature range from 250to450K. The Cole-Cole relaxation equation modified by introducing the conductivity was used to describe the experimental dielectric spectra of a high permittivity. Excellent agreement has been obtained in wide frequency domain (100–107Hz) between the measured and calculated permittivities in the 250–450K temperature range. The dielectric relaxation frequency obeys the Arrhenius behavior with activation energy of 0.181eV. A separation of the grain and grain boundary properties has been achieved using an equivalent circuit model. The diffe...read more
Citations
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References
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Journal ArticleDOI
High Dielectric Constant in ACu3Ti4O12 and ACu3Ti3FeO12 Phases
TL;DR: In this article, the dielectric properties of isostructural compounds of the type A 2/3 Cu 3 Ti 4 O 12 (A =trivalent rare earth or Bi) have been presented.
Journal ArticleDOI
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Journal ArticleDOI
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Journal ArticleDOI
Impedance and modulus spectroscopy of semiconducting BaTiO3 showing positive temperature coefficient of resistance
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Journal ArticleDOI
Giant dielectric constant response in a copper-titanate
Arthur P. Ramirez,Munirpallam A. Subramanian,Margaret L. Gardel,Girsh Blumberg,Der-Chiang Li,Thomas Vogt,S. M. Shapiro +6 more
TL;DR: In this paper, the authors describe a material, cubic CaCu 3 Ti 4 O 12, which exhibits a large dielectric response, the temperature-dependence of which has not been seen, to our knowledge, in any existing material.