摘要
制备了铅基弛豫铁电体0.9 Pb(Mg1/3Nb2/3)O3-0.1 PbTiO3和Pb(Zn1/3Nb2/3)O3基陶瓷.利用修正的局域冻结玻璃模型研究了弛豫铁电体微畴-宏畴转变动力学和微畴生长动力学,结果表明,微畴-宏畴转变过程是量子化的过程,微畴-宏畴转变的驱动力主要是热驱动力和能量驱动力,微畴-宏畴转变稳定性由活化能和状态数来判断,而微畴生长动力学的稳定性可以用稳定性判据值大小确定.
The Pb-based complex perovskite relaxor ferroelectrics (RFE) of Pb(Mg1/3Nb2/3)O-3(PMN) and Pb (Zn1/3Nb2/3)O-3(PZN) ceramics were prepared by conventional methods. The dynamics on microdomain-macrodomain transition of relaxor ferroelectrics was investigated by using amended local freezing glass-model. The dynamics on microdomain growth was also studied. The result shows that microdomain-macrodomain transition is a quantum transition process, while its driving forces are mainly. heating force and energy force. The stability of the microdomain-macrodomain transitionin RFE is judged by both the activating energy and state parameter. The stability of the microdomain growth was judged by the K value of stability.
出处
《物理化学学报》
SCIE
CAS
CSCD
北大核心
2004年第7期712-716,共5页
Acta Physico-Chimica Sinica
基金
江苏高校自然科学研究计划(03KJB430068)资助项目
关键词
弛豫铁电体
微畴
宏畴
生长
动力学
relaxor ferroelectrics
microdomain
macrodomain
growth
dynamics
