Structural and Electric Properties of Ba-Fe-Ta-Na-Bi-Ti-O Ceramic System

Anjana Yadav; Kumar P. Chandra; Ajit R. Kulkarni; Kamal Prasad

doi:10.4028/p-6902r9

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HomeMaterials Science ForumMaterials Science Forum Vol. 1074Structural and Electric Properties of...

Structural and Electric Properties of Ba-Fe-Ta-Na-Bi-Ti-O Ceramic System

Abstract:

The X-ray diffraction, microstructure, impedance, electric modulus, and ac-conductivity of Ba(Fe_1/2Ta_1/2)O₃–(Na_1/2Bi_1/2)TiO₃ solid-solutions were studied utilising a traditional high-temperature mixed-oxide technique. The phase-formations of the solid-solutions were determined utilising X-ray data, while SEM micrographs revealed a non-uniform dispersion of grains in the sample of unequal size (~1 – 20 mm). In all of the developed solid-solutions, the frequency (1Hz - 1MHz) dependence of imaginary and real parts of electric impedance in the temperature region of 50 and 500°C showed the NTCR character and hopping type of electrical conduction. The modulus spectrum variation was intrigued by the hopping mechanism for charge transport (temperature-dependent) in the samples with non-Debye type of behaviour. Besides, the low electrical conductivity of these solid-state solutions makes them ideal for industrial applications, particularly as capacitors.

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Periodical:

Materials Science Forum (Volume 1074)

Pages:

53-59

DOI:

https://doi.org/10.4028/p-6902r9

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Online since:

November 2022

Authors:

Anjana Yadav, Kumar P. Chandra, Ajit R. Kulkarni, Kamal Prasad*

Keywords:

Ac Conductivity, BFT-NBT, Electric Modulus, Impedance, Lead-Free, Solid Solution

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