Synthesis and Electrical Analysis of Ba₅GdTi₃V₇O₃₀ Ceramics

Bana B. Mohanty, Priyadarshini S. Sahoo, Mahapatra P. K. Sahoo, Ram N. P. Choudhary

Department of Physics, Betnoti College Betnoti, Mayurbhanj, India.
Department of Physics, ITER, Bhubaneswar, India.
Department of Physics, RGU-IIIT, Krishna, India.

DOI: 10.4236/msa.2012.33027                

Abstract

A polycrystalline sample of Ba₅GdTi₃V₇O₃₀ was prepared using a mixed oxide method at high temperature (i.e., at 950℃). The formation of single-phase compound with orthorhombic structure at room temperature was confirmed from preliminary X-ray diffraction study. Detailed studies of dielectric properties of Ba₅GdTi₃V₇O₃₀, investigated in a wide frequency range (10² - 10⁶ Hz) at different temperatures (33℃ - 500℃) showed that these properties of the material are strongly dependent on frequency and temperature. The existence a dielectric anomaly suggests that the compound has a transition temperature at ~385℃. The nature of the variation of conductivity and value of activation energy in different regions, calculated from the temperature dependence of ac conductivity (dielectric data) suggest that the conduction process is of mixed type (i.e., ionic-polaronic and space charge generated from the oxygen ion vacancies). The ac conductivity spectrum obeys Jonscher’s universal power law.

Keywords

Ceramics; Electrical Properties; Dielectrics

Conflicts of Interest

The authors declare no conflicts of interest.

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