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
收藏
页码：2287 / 2291
页数：5
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