摘要
利用特殊的陶瓷烧结方法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的弛豫过程可用修正的玻璃局域冻结模型描述。在微畴-宏畴转变过程中,铁电体的结构起伏引起弛豫性;弛豫铁电体结构起伏程度越大,弛豫性越低;随微畴增大,铁电体的弛豫特性减弱直至消失。
The Pb-based complex relaxor ferroelectrics (RFE) of PMN and PZN ceramics were prepared. The microdomain-macrodomain transition of relaxor ferroelectrics was studied by using amending local freezing glass-model. The frequency dispersion of the temperature of the dielectric permittivity maximum had been caused by the structural fluctuation of RFE during the microdomain-macrodomain transition. The more the structural fluctuation of RFE was, the lower the relaxation degree was in the process of microdomain-macrodomain transition. The relaxation degree was diminished or vanished when the microdomain became larger.
出处
《功能材料》
EI
CAS
CSCD
北大核心
2005年第7期1017-1020,1023,共5页
Journal of Functional Materials
基金
江苏高校自然科学研究计划资助项目(03KJB430068)
关键词
弛豫铁电体
结构
陶瓷
玻璃
Ceramic materials
Glass
Magnetic relaxation
Sintering
