Enhanced piezoelectric properties of (Bi0.5K0.5+xLiy)TiO3 ceramics by K nonstoichiometry and Li addition

被引：25

作者：

Sung, Y. S. ^{[1
]}

Lee, H. M. ^{[1
]}

Du, W. ^{[1
]}

Yeo, H. G. ^{[1
]}

Lee, S. C. ^{[1
]}

Cho, J. H. ^{[1
]}

Song, T. K. ^{[1
]}

Kim, M. H. ^{[1
]}

机构：

[1] Changwon Natl Univ, Sch Nano & Adv Mat Engn, Gyeongnam 641773, South Korea

来源：

APPLIED PHYSICS LETTERS | 2009年 / 94卷 / 06期

关键词：

bismuth compounds; crystal microstructure; electric domain walls; lithium compounds; piezoceramics; potassium compounds; stoichiometry; vacancies (crystal); ZIRCONATE-TITANATE CERAMICS; (BI1/2K1/2)TIO3 CERAMICS; LEAD; PEROVSKITES;

D O I：

10.1063/1.3081018

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

Effects of K nonstoichiometry and Li addition on piezoelectric and dielectric properties of (Bi0.5K0.5+xLiy)TiO3 ceramics were studied in the range of x=-8-1 and y=0-5 mol % from the stoichiometric K-0.5. A tetragonal perovskite structure was maintained at all compositions despite the formation of secondary phases with K deficiency. Piezoelectric coefficient (d(33)) was improved from 13 pC/N at x=0 mol % to 32 pC/N at x=-5 mol % due to K vacancies facilitating domain walls movement. It was further enhanced showing a peak value of 103 pC/N at x=-5 and y=3 mol % due to the microstructure improved with the tetragonality optimized by Li addition.

引用

页数：3

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