弛豫铁电体结构起伏与弛豫性研究  

Structural Fluctuation and Relaxation of Perovskite Relaxor Ferroelectrics

作　　者：张栋杰[1] 姚熹[2] 

机构地区：[1]南京师范大学材料科学重点实验室,南京210097 [2]西安交通大学电子材料与元器件研究所,西安710049

出　　处：《化学学报》2005年第12期1095-1099,i003,共6页Acta Chimica Sinica

基　　金：江苏高校自然科学研究计划(No.03KJB430068)资助项目.

摘　　要：制备了铅基弛豫铁电体0.9Pb(Mg1/3Nb2/3)O3-0.1PbTiO3和Pb(Zn1/3Nb2/3)O3基陶瓷.铅基弛豫铁电体PMNT,PZN基陶瓷弛豫过程可用局域冻结模型描述.在微畴-宏畴转变过程中,弛豫铁电体产生结构起伏;在相同的频率条件下,弛豫铁电体的结构起伏程度越大,弛豫程度越低.在微畴-宏畴转变过程中,随微畴的增大,弛豫铁电体的弛豫特性减弱或消失.The Pb-based complex perovskite relaxor ferroelectrics (RFE) of PMN and PZN ceramics were prepared. The microdomain-macrodomain transition of relaxor ferroelectrics was investigated by conventional method deeply by using amending local freezing glass-model. The structural fluctuation has taken place in RFE during the microdomain-macrodomain transition. The larger the structural fluctuation of RFE was, the lower the relaxation degree was in the same frequency condition. The relaxation degree was diminished or even vanished when the microdomain became larger.

关 键 词：PB(ZN1/3NB2/3)O3 起伏 体结构 弛豫铁电体 PZN基陶瓷 转变过程 微畴-宏畴 PMNT 模型描述 弛豫过程 频率条件 铅基 

分 类 号：TM22[一般工业技术—材料科学与工程]