Jpn. J. Appl. Phys. 37 (1998) pp. 5311-5314  |Next Article|  |Table of Contents|
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Lead-Free Piezoelectric Ceramics of (Bi_1/2Na_1/2)TiO₃–KNbO₃–1/2(Bi₂O₃·Sc₂O₃) System

Hajime Nagata and Tadashi Takenaka

(Received May 27, 1998; accepted for publication June 24, 1998)

Bismuth sodium titanate, (Bi_1/2Na_1/2)TiO₃ (BNT)-based solid solution, a(Bi_1/2Na_1/2)TiO₃–bKNbO₃–c1/2(Bi₂O₃·Sc₂O₃) (a+b+c=1), [KTNS(100a/100b/100c)], was studied for its dielectric, ferroelectric and piezoelectric properties, as a new group of lead-free piezoelectric ceramics. Electrical measurements such as dielectric and piezoelectric properties show that the KTNS(100a/100b/100c) ceramics near the BNT side have a relatively high electromechanical coupling factor, k₃₃ (=0.47). On particular, the amount of modified Bi ions has an effect on k₃₃. These ceramics seem to be a candidate for lead-free piezoelectric ceramics.

URL: http://jjap.jsap.jp/link?JJAP/37/5311/
DOI: 10.1143/JJAP.37.5311

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