Na_(1/2)Bi_(1/2)TiO_3基无铅压电体系退极化行为的研究进展  

Development of the Depolarization Behavior of Lead-Free Na_(1/2)Bi_(1/2)TiO_3-Based Piezoelectrics

作　　者：朱满康[1] 段成辉[1] 雷娜[1] 刘立英[2] 宋雪梅[1] 侯育冬[1] 严辉[1] 

机构地区：[1]北京工业大学材料学院,北京100124 [2]北京工业大学应用数理学院,北京100124

出　　处：《硅酸盐学报》2012年第10期1403-1408,共6页Journal of The Chinese Ceramic Society

基　　金：国家自然科学基金(51172006;51072008)

摘　　要：简述了钛酸铋钠[Na1/2Bi1/2TiO3,BNT]的相变过程及其退极化现象,介绍了退极化温度的确定方法,概述了NBT基复合体系准同型相界(MPB)附近的退极化行为,总结了有关退极化温度影响机制的几种观点。借鉴PbTiO3基高温压电体系的研究,提出采用具有小允差因子的Bi基钙钛矿Bi(B′B″)O3作为第二组元,与BNT形成新型无铅压电复合体系,以求提高MPB处的退极化温度,并简述了相关的研究报道。The phase transition and depolarization phenomena of sodium bismuth titanate [（Bi1/2Na1/2）TiO3,BNT] was reviewed.The methods determining the depolarization temperature were represented.Also,the depolarization behaviors of traditional BNT-based systems near morphotropic phase boundary（MPB） were summarized,and the mechanisms affecting the depolarization temperature of BNT-based systems were reviewed.A rule for the novel BNT-based complex systems was proposed via the introduction of Bi-based perovskite Bi（B′B″）O3as second end member.It was suggested that the BNT-Bi（B′B″）O3systems as-constituted could present a MPB at a high depolarization temperature by utilizing the feature of Bi（B′B″）O3with a low tolerance factor.

关 键 词：钛酸铋钠 无铅压电 退极化 Bi基钙钛矿 

分 类 号：TM282[一般工业技术—材料科学与工程]