Lead-Free Piezoelectric Ceramics of (Bi1/2Na1/2)TiO3–KNbO3–1/2(Bi2O3·Sc2O3) System
Authors:
- Hajime NagataHNHajime Nagata
- Tadashi TakenakaTTTadashi Takenaka
- 1 September 1998
- journal article
- Published by IOP Publishing in Japanese Journal of Applied Physics
- Vol. 37 (9S) , 5311
Abstract
Bismuth sodium titanate, (Bi1/2Na1/2)TiO3 (BNT)-based solid solution, a(Bi1/2Na1/2)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, k 33 (=0.47). On particular, the amount of modified Bi ions has an effect on k 33. These ceramics seem to be a candidate for lead-free piezoelectric ceramics.Keywords
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