PBSZT弛豫铁电陶瓷偏压压电效应的研究  

Piezoelectric Effect Induced by Direct C urrent Bias in PBSZT Relaxor Ferroelectr ic Ceramics

作　　者：伍建新[1] 庄志强[1] 

机构地区：[1]华南理工大学材料科学与工程学院,广州510641

出　　处：《压电与声光》1999年第5期415-419,共5页Piezoelectrics & Acoustooptics

基　　金：广东省自然科学基金

摘　　要：研究了镧和铋掺杂的锆钛酸铅钡锶（ＰＢＳＺＴ）弛豫铁电陶瓷在不同直流偏压及温度下的介电常数ε３３、平面机电耦合系数ｋｐ 和等效横向压电常数ｄ３１。实验表明，ＰＢＳＺＴ弛豫铁电陶瓷的ｄ３１值可由直流偏压控制且温度系数远小于ＰＭＮ－ＰＴ系陶瓷。室温下镧和铋掺杂的ＰＢＳＺＴ陶瓷在１０ ｋＶ／ｃｍ 的偏压下｜ｄ３１｜分别为２１０ ｐＣ／Ｎ和２２０ ｐＣ／Ｎ。The dielectric constan t ε 33 , electromechanical planar coupling fact or k p and effective transverse piezoe lectric coefficient d 31 under dire ct current bias at different temperature s were investigated for barium and stron tium co modified lead zirconate titanate (PBSZT) relaxor ferroelectric ceramics. The experiments show that d 31 of P BSZT ceramics can be controlled by direc t current bias and its temperature depen dence is much less compared to that of P MN PT ceramics. The values of ｜ d 31 ｜ under the bias of 10 kV/cm for La doped and Bi doped PBSZT ceramics are 210 pC/ N and 220 pC/N respectively at room temp erature.

关 键 词：偏压压电效应 锆钛酸铅钡锶 弛豫铁电陶瓷 

分 类 号：TM282.013[一般工业技术—材料科学与工程]