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Home  >  Journal list  >  Journal of the Ceramic Society of Japan  >  Vol.122  No.1426 (June) (2014)  >  pp.406-409

Journal of the Ceramic Society of Japan
<<Previous article Vol.122  No.1426 (June) (2014)   pp.406 - 409 Next article>>

High-temperature and high-power piezoelectric characteristics of (Bi0.5Na0.5)TiO3-Based lead-free piezoelectric ceramics

Shinya SOMENO1), Hagime NAGATA1), Tadashi TAKENAKA1)
1) Faculty of Science and Technology, Tokyo University of Science

The high-power piezoelectric characteristics of (Bi0.5Na0.5)TiO3 (BNT)-based solid solutions at a high temperature (~130°C) were studied, by comparing them with those of hard Pb(Zr,Ti)O3 (PZT) ceramics. The vibration velocity v0-p of the BNT-based ceramics was stable as the temperature increased to 130°C, whereas that of the PZT-based ceramics markedly decreased with increasing temperature. It is generally known that the stability of v0-p under high-amplitude vibration is related to mechanical losses caused by domain wall motion. Therefore, the temperature dependence of the mechanical quality factor Qm of these ceramics was measured by electric transient response measurement. The measured Qm values of the BNT-based ceramics were nearly constant or slightly decreased with increasing temperature, whereas Qm for the PZT ceramic markedly decreased with increasing temperature.


Keyword:
Lead-free piezoelectric ceramics, Perovskite, Piezoelectric property, High-power, High-temperature

Received: December 17, 2013
Accepted: January 27, 2014 , Published online: June 01, 2014
Copyright © 2014 The Ceramic Society of Japan

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