BNT-BZT压电陶瓷准同相界处材料性能的研究  

Properties of(Na,Bi)TiO_3-Ba(Zr,Ti)O_3 Lead-Free Piezoelectric Ceramic

作　　者：王保卫[1] 褚祥诚[1] 李恩竹[1] 李龙土[1] 桂治轮[1] 

机构地区：[1]清华大学新型陶瓷与精细工艺国家重点实验室,北京100084

出　　处：《稀有金属材料与工程》2008年第A01期493-495,共3页Rare Metal Materials and Engineering

基　　金：国家自然科学基金(10676015);北京市科技新星计划资助项目(2006B56)

摘　　要：研究(1-x)(Bi_(0.5)Na_(0.5))TiO_3-xBa(Ti_(0.95)Zr_(0.05))O_3(BNT-BZT)体系陶瓷的准同型相界,以及陶瓷材料的微观结构和性能之间的关系。BNT-BZT陶瓷体系在富BNT和Zr含量低的区域存在准同型相界,在相界附近可能得到性能优良的无铅压电陶瓷,相界点在x≈0.1这个区域内。将BNT陶瓷和BZT陶瓷固溶后能够得到d_(33)大于150 pC/N,居里温度在240℃左右,介电常数在900左右的性能良好的无铅压电陶瓷。The NBT-BZT ceramics were prepared along the route of solid state reaction. In particular, the study focused on the dielectric and piezoelectric properties of the BNT-based ceramics in connection to the MPB compositions of the NBT-BZT ceramics. When x≈0.1, the phase transition from rhombohedral to tetragonal was observed. This indicates the existence of the morphotropic phase boundary in the BNT-BZT system. The maximum piezoelectric constant was determined to be 150 pC/N and the Curie temperature was 240 ℃. The d33 was around 900, these properties make the present system of ceramics promising for the lead-free piezoelectric ceramics.

关 键 词：无铅压电陶瓷 钛酸铋钠 锆钛酸钡 准同相界 

分 类 号：TQ174.1[化学工程—陶瓷工业]