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IMPEDANCE MEASUREMENTS ON PZT AND La_0.75Bi_3.25Ti₃O₁₂ CERAMICS

Department of Physics, P.G. Centre, P.B. Siddhartha Arts & Science College, Acharya Nagarjuna University (Affiliated), Vijayawada 5200 10, India

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J. SUBRAHMANYAM

Department of Physics, P.G. Centre, P.B. Siddhartha Arts & Science College, Acharya Nagarjuna University (Affiliated), Vijayawada 5200 10, India

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P. NARAYANA MURTY

Department of Physics, P.G. Centre, P.B. Siddhartha Arts & Science College, Acharya Nagarjuna University (Affiliated), Vijayawada 5200 10, India

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S. KARMAKAR

Lasers Materials Development and Devices Division, Raja Ramanna Centre for Advanced Technology, Indore 452013, India

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, and

S. M. GUPTA

Lasers Materials Development and Devices Division, Raja Ramanna Centre for Advanced Technology, Indore 452013, India

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https://doi.org/10.1142/S0217979209053011Cited by:4 (Source: Crossref)

Abstract

Impedance measurements were made on technological important ferroelectric ceramics, namely PZT and La_0.75 Bi_3.25Ti₃O₁₂ (BLT), in the frequency range of 100 Hz to 1 MHz, from room temperature to 500°C. Combined impedance and modulus spectroscopic analysis along with the detailed conductivity (ac and dc) data was used to understand the heterogeneity of the ceramics and the results were corroborated with temperature coefficient of dc-conductivity (figure of merit) data for the further understanding. AC-conductivity plots against frequency at different temperatures for PZT and BLT suggest the response of obeying Jonscher's and modified Jonscher's law, respectively.

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