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Effect of Bi2O3 Addition on the Microstructure and Electrical Properties of Lead-Free (Na0.5K0.5)NbO3-Bi0.5(Na0.93K0.07)0.5TiO3 Ceramics
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Effect of Bi2O3 Addition on the Microstructure and Electrical Properties of Lead-Free (Na0.5K0.5)NbO3-Bi0.5(Na0.93K0.07)0.5TiO3 Ceramics

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Abstract:

In the present study, various quantities of Bi2O3 were added into 0.98(Na0.5K0.5)NbO3-0.02Bi(Na0.93K0.07)TiO3 (0.98NKN-0.02BNKT) ceramics. It was found that 0.98NKN-0.02BNKT with the addition of 0~0.5 wt.% Bi2O3 exhibit relatively good piezoelectric properties. For 0.98NKN-0.02BNKT ceramics, the electromechanical coupling coefficients of the planar mode kp and the thickness mode kt reach 0.40 and 0.47,respectively. For 0.98NKN-0.02BNKT ceramics with the addition of 0.3 wt.% Bi2O3, the electromechanical coupling coefficients ofthe planar mode kp and the thickness mode kt reach 0.50 and 0.53, respectively. It is obvious that 0.98NKN-0.02BNKT solid solution ceramics by adding low quantities of Bi2O3 is one of the promising lead-free ceramics for electromechanical transducer applications.

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Periodical:

Applied Mechanics and Materials (Volumes 479-480)

Pages:

3-7

DOI:

https://doi.org/10.4028/www.scientific.net/AMM.479-480.3

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Online since:

December 2013

Authors:

Chun Huy Wang

Keywords:

Dielectric Property, Lead-Free Piezoceramic, Piezoelectric Property, Poling, Sintering

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© 2014 Trans Tech Publications Ltd. All Rights Reserved

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