PZT陶瓷FRL-FRH相变自发极化的定量计算

无机材料学报

PZT陶瓷F_RL-F_RH相变自发极化的定量计算

杜静; 孙大志; 林盛卫

中国科学院上海硅酸盐研究所, 上海 200050

收稿日期:1999-12-02 修回日期:2000-01-05 出版日期:2000-12-20 网络出版日期:2000-12-20

Quantitative Calculation of Spontaneous Polarization during the F_RL-F_RH Transition of PZT Ceramics

DU Jing; SUN Da-Zhi; LIN Sheng-Wei

Shanghai Institute of Ceramics; Chinese Academy of Science; Shanghai 200050; China

Received:1999-12-02 Revised:2000-01-05 Published:2000-12-20 Online:2000-12-20

摘要/Abstract

摘要： 针对ＰＺＴ９５／５陶瓷材料Ｆ_ＲＬ－Ｆ_ＲＨ相变时的热释电特性，建立了相变过程中自发极化随温度变化的定量计算表达式，表达式中的函数级数依据Ｌｅｉｂｎｉｚ交错级数定理，可按照实际要求的精确程度进行级数求和，故利用计算机拟合了自发极化随温度的变化曲线．拟合曲线与实验测量的结果相一致，证明了理论计算公式能定量地描述相变过程中自发极化随温度变化的规律，有利于对铁电材料的相变性质进行深人的研究．

关键词: F_RL-F_RH相变, 热释电, 自发极化

Abstract: In view of the pyroelectric performance of PZT95/5 ceramics during the F_RL-F_RH transition, an analytic formula of spontaneous polarization varying with the temperature during
the phase transition was established. According to Leibniz theorem of stagger progression, a sum can be extracted from the progression function in the formula
in accordance with actually required accuracy. The curves of spontaneous polarization vs temperature for PZT95/5 ceramics during the F_RL-F_RH transition
were simulated by means of the computer. The simulated curves fitted well with the experimentally measured curves. The result testified that the variation of
spontaneous polarization during the phase transition can be described quantitatively and gives the theoretical significance to investigate deeply the phase transition
performance of ferroelectric materials.

Key words: F_RL-F_RH transition, pyroelectric performance, spontaneous polarization

中图分类号:

TM22

杜静,孙大志,林盛卫. PZT陶瓷F_RL-F_RH相变自发极化的定量计算[J]. 无机材料学报.

DU Jing,SUN Da-Zhi,LIN Sheng-Wei. Quantitative Calculation of Spontaneous Polarization during the F_RL-F_RH Transition of PZT Ceramics[J]. Journal of Inorganic Materials.

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