物理化学学报 >> 2004, Vol. 20 >> Issue (07): 712-716.doi: 10.3866/PKU.WHXB20040709

研究论文 上一篇    下一篇

弛豫铁电体的微畴-宏畴转变与生长动力学

张栋杰;姚熹   

  1. 南京师范大学材料科学实验室,南京 210097; 西安交通大学电子材料实验室,西安 710049
  • 收稿日期:2003-12-22 修回日期:2004-03-01 发布日期:2004-07-15
  • 通讯作者: 张栋杰 E-mail:zhangdongjie@pine.njnu.edu.cn

Dynamics on Microdomain-Macrodomain Transition of Relaxor Ferroelectrics

Zhang Dong-Jie;Yao Xi   

  1. Laboratory of Materials Science, Nanjing Normal University,Nanjing 210097;Electronic Materials Research Laboratory, Xi′an Jiaotong University, Xi′an 710049
  • Received:2003-12-22 Revised:2004-03-01 Published:2004-07-15
  • Contact: Zhang Dong-Jie E-mail:zhangdongjie@pine.njnu.edu.cn

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.

关键词: 弛豫铁电体, 微畴, 宏畴, 生长, 动力学

Abstract: The Pb-based complex perovskite relaxor ferroelectrics (RFE) of Pb(Mg1/3Nb2/3)O3(PMN) and Pb(Zn1/3Nb2/3)O3(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 transition in 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.

Key words: Relaxor ferroelectrics, Microdomain, Macrodomain, Growth, Dynamics