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化学学报
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化学学报 ›› 2005, Vol. 63 ›› Issue (12): 1095-1099. 上一篇    下一篇

研究论文

弛豫铁电体结构起伏与弛豫性研究

张栋杰*1，姚熹2   

  1. (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)
  • 投稿日期:2004-07-01 修回日期:2005-02-21 发布日期:2010-12-10
  • 通讯作者: 张栋杰

Structural Fluctuation and Relaxation of Perovskite Relaxor Ferroelectrics

ZHANG Dong-Jie*1, YAO Xi2   

  1. (1 Laboratory of Materials Science, Nanjing Normal University, Nanjing 210097)
    (2 Electronic Materials Research Laboratory, Xi′an Jiaotong University, Xi′an 710049)
  • Received:2004-07-01 Revised:2005-02-21 Published:2010-12-10
  • Contact: ZHANG Dong-Jie

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1739

被引次数

12

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.

关键词: 铁电体, 弛豫, 结构, 畴

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 dimi- nished or even vanished when the microdomain became larger.

Key words: ferroelectrics, relaxor, structure, domain