Jpn. J. Appl. Phys. 36 (1997) pp. 6055-6057  |Next Article|  |Table of Contents|
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Lead-Free Piezoelectric Ceramics of (Bi_1/2Na_1/2)TiO₃–1/2(Bi₂O₃·Sc₂O₃) System

Hajime Nagata and Tadashi Takenaka

(Received May 27, 1997; accepted for publication June 20, 1997)

Bismuth sodium titanate, (Bi_1/2Na_1/2)TiO₃ (BNT)-based solid solution, (1- x)(Bi_1/2Na_1/2)TiO₃–
x1/2(Bi₂O₃·Sc₂O₃) [BNST-100 x], was studied in order to determine its dielectric, ferroelectric and piezoelectric properties as a new group of lead-free piezoelectric ceramics. Measurements of dielectric and piezoelectric properties show that the BNST-100 x ceramics of composition near BNT composition have relatively low free permittivity, ε₃₃ ^T/ε₀ (=431) and high electromechanical coupling factor, k₃₃ (=0.42). These ceramics are good candidates for use as lead-free piezoelectric ceramics.

URL: http://jjap.jsap.jp/link?JJAP/36/6055/
DOI: 10.1143/JJAP.36.6055

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