Dielectric and piezoelectric properties of (Bi0.5Na0.5)TiO3-(Bi0.5K0.5)TiO3 systems

被引：837
|
作者：
Sasaki, A [1 ]
Chiba, T
Mamiya, Y
Otsuki, E
机构：
[1] Tokin Co Ltd, Adv Mat Dev Ctr, Sendai, Miyagi 9828510, Japan
[2] Tokin Co Ltd, Technol Dev Div 2, Sendai, Miyagi 9828510, Japan
来源：
JAPANESE JOURNAL OF APPLIED PHYSICS PART 1-REGULAR PAPERS SHORT NOTES & REVIEW PAPERS | 1999年 / 38卷 / 9B期
关键词：
piezoelectric ceramics; morphotropic phase boundary; bismuth sodium titanate; bismuth potassium titanate; lead-free;
D O I：
10.1143/JJAP.38.5564
中图分类号：
O59 [应用物理学];
学科分类号：
摘要：
The structural, dielectric and piezoelectric properties of [Bi-0.5(Na1-x K-x)(0.5)]TiO3 ceramics were studied for the compositional range, X = 0-1.0. The samples were prepared by a conventional sintering technique. From X-ray diffraction results, it was found that the morphotropic phase boundary (MPB) between (Bi0.5Na0.5)TiO3 (rhombohedral) and (Bi0.5K0.5)TiO3 (tetragonal) exists in the range of X = 0.16-0.20. Polarization-Electric field hysteresis loops show that the remanent polarization at X = 0.20 (BNTK20) is larger than that at X = 0.0 (BNT). Peaks of electromechanical coupling factor, dielectric constant, piezoelectric constant and elastic compliance were obtained at X = 0.16-0.20 of the MPB region. Dielectric and piezoelectric properties are enhanced in the MPB region for [Bi-0.5(Na1-xKx)(0.5)]TiO3, similar to that observed for Pb(Zr, Ti)O-3.
引用
收藏
页码：5564 / 5567
页数：4
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