PZN-BT-PZT陶瓷的相结构与压电和介电性能研究

PHASE STRUCTURE AND DIELECTRIC PIEZOELECTRIC PROPERTIES OF PZN-BT-PZT CERAMICS

采用传统陶瓷工艺合成了（１－ｘ）［０．９４Ｐｂ（Ｚｎ１／３Ｎｂ２／３）Ｏ３－０．０６ＢａＴｉＯ３］－ｘＰｂ（Ｚｒ０．５３Ｔｉ０．４７）Ｏ３系陶瓷材料．结构分析表明，在ｘ＞０．３０时，可以得到纯钙钛矿相，在ｘ＝０．５０～０．６０附近存在一个三方－四方共存的准同型相界，在此相界附近的压电、介电性能较好．同时还研究了退火处理对其介电、压电性能的影响，得到了平面机电耦合系数Ｋｐ＝６０％，压电系数ｄ３３＝５２０ｐＣ／Ｎ左右，相对介电常数εｍ达到２万左右的压电材料．

x)iO3]-xPb(Zr0.53Ti0.47)O3 ceramics were prepared by conventional ceramic processing. The results show that it is easy to obtain pure perovskite phase when x>0.30. When x=0.500.60, there is a rhombohedral/tetragonal morphotropic phase boundary. Better piezoelectric and dielectric properties exist near the phase boundary. After thermal annealing, improved piezoelectric and dielectric properties have been obtained. In this paper, Kp=60%,d33=520 pC/N, m20 000 are achieved.