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Crystal Structure and Dielectric Properties of Microwave Ceramics CaLa(CaM)O6 [M = Nb, Sb]

A DUTTA, S MANDAL, P KUMARI, P K MUKHOPADHYAY, , T P SINHA
Published in Springer New York LLC
2017
Volume: 46
   
Issue: 3
Pages: 1889 - 1894
Abstract

The dielectric properties of two perovskite oxides CaLa(CaM)O6 [M = Nb, Sb] synthesized by the solid-state reaction technique have been studied in the microwave and radio frequency range. The phase formation and the crystal structure of the materials are investigated by the Rietveld refinement of the x-ray diffraction data at room temperature. The Raman spectrum substantiates the crystal structure of the materials. The temperature dependence of the relaxation frequencies in the radio frequency range follows the Arrhenius law, and the corresponding activation energies are found to be 0.339 eV and 0.346 eV, respectively, for CaLa(CaNb)O6 and CaLa(CaSb)O6. The difference in the values of the dielectric constant and the loss tangent are correlated with the respective crystal structure of the materials. © 2017, The Minerals, Metals & Materials Society.

About the journal
JournalData powered by TypesetJournal of Electronic Materials
PublisherData powered by TypesetSpringer New York LLC
ISSN0361-5235