Vol. 24 No. 2 (2014)
Papers

Ba\(_{1-x}\)Ca\(_{x}\)TiO\(_{3}\) and the Dielectric Properties

Nguyen Van Khien
Thai Nguyen University, Thai Nguyen City
Vu Dinh Lam
Material Science Institute, Academic Science and Technology Vietnam 18, Hoang Quoc Viet, Cau Giay District, Ha Noi City
Le Van Hong
Material Science Institute, Academic Science and Technology Vietnam 18, Hoang Quoc Viet, Cau Giay District, Ha Noi City
Bio

Published 04-06-2014

How to Cite

Khien, N. V., Lam, V. D., & Hong, L. V. (2014). Ba\(_{1-x}\)Ca\(_{x}\)TiO\(_{3}\) and the Dielectric Properties. Communications in Physics, 24(2), 170. https://doi.org/10.15625/0868-3166/24/2/3870

Abstract

Ba1-xCaxTiO3 material samples with x changing from zero to 1 were fabricated by the solid state reaction method at a temperature of 1200 oC in the ambient atmosphere. Crystalline structure of the material samples was recorded and identified by X-ray diffraction and Raman scattering. Analyzing the X-ray patterns found that Ba can be completely substituted by Ca with the concentration lower than 11 at%. The frequency dependence of the impedance (C) and AC conductance (G) of all the samples were recorded in a frequency range lower than 10 MHz by using an impedance analyzer HP 4192A. It was found that in the low frequency range lower than 1 MHz the dielectric constant and its loss decrease as Ca substituted for Ba. Besides an abnormal in the frequency dependence of the dielectric constant was observed for all samples in the higher frequency range up to 10 MHz.

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