Elastic anomalies near phase transitions of lead-free (Na,Bi)TiO3 and (Ba,Zr)TiO3 ferroelectric ceramics

被引：0

作者：

Liu, Xiaozhou ^{[1
]}

Zhang, Tingting ^{[1
]}

Zhang, Shujun ^{[2
]}

Cao, Wenwu ^{[2
]}

机构：

[1] Nanjing Univ, Inst Acoust, Key Lab Modern Acoust, Nanjing 210093, Jiangsu, Peoples R China

[2] Penn State Univ, Mat Res Inst, University Pk, PA 16802 USA

来源：

CHINESE SCIENCE BULLETIN | 2014年 / 59卷 / 19期

基金：

中国国家自然科学基金;

关键词：

Elastic modulus; Lead-free ferrooelectric ceramics; Phase transition; Temperature; Ultrasonic method;

D O I：

10.1007/s11434-014-0364-9

中图分类号：

O [数理科学和化学]; P [天文学、地球科学]; Q [生物科学]; N [自然科学总论];

学科分类号：

07 ; 0710 ; 09 ;

摘要：

We have investigated the temperature dependence of elastic modulus for various ferroelectric ceramics in the temperature range of 20-90 A degrees C. The Na0.5Bi0.5TiO3 (NBT) ceramics has a phase transition at 200 A degrees C, thus exhibits minimal change in elastic modulus up to 90 A degrees C, while the elastic modulus of the BaZr0.07Ti0.93O3 (BZT-7) shows 12.5 % change at the phase transition temperature of 70 A degrees C and that of the BaZr0.15Ti0.85O3 (BZT-15) ceramics shows 34.6 % change at the phase transition temperature of 60 A degrees C. The variations of elastic modulus will affect the temperature stability of devices made by these lead-free ferroelectric ceramics.

引用

页码：2287 / 2291

页数：5

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