前驱体制备途径对PFN-PMN二元铅基铁电陶瓷性能的影响

无机材料学报

前驱体制备途径对PFN-PMN二元铅基铁电陶瓷性能的影响

喻佑华; 冯楚德; 杨毅; 李承恩; 晏海学

中国科学院上海硅酸盐研究所上海 200050

收稿日期:2000-11-08 修回日期:2001-01-08 出版日期:2001-11-20 网络出版日期:2001-11-20

Effects of Various Precursor Process Routes on the Properties of Lead-Based Ferroelectric Ceramics in PFN-PMN Binary System

YU You-Hua; FENG Chu-De; YANG Yi; LI Cheng-En; YAN Hai-Xue

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

Received:2000-11-08 Revised:2001-01-08 Published:2001-11-20 Online:2001-11-20

摘要/Abstract

摘要： 综合运用ＸＲＤ、ＳＥＭ、ＴＥＭ、ＥＤＳ和介电测量等方法，考察了一步预煅烧法和二步预煅烧法等前驱体制备途径对Ｐｂ（Ｆｅ_１／２Ｎｂ_１／２）Ｏ_３（ＰＦＮ）－Ｐｂ（Ｍｇ_１／３Ｎｂ_２／３）Ｏ_３（ＰＭＮ）二元系铁电陶瓷显微结构和介电性能的影响．研究结果表明，对（１－Ｘ）ＰＦＮ－ＸＰＭＮ二元系而言，在所考查的组成范围内（Ｘ＝０～０.５）；其居里温度与ＰＭＮ的含量近似成线性关系，且随Ｘ的增加，居里温度向低温方向移动.峰值介电常数随Ｘ的增加而降低．（预）煅烧和烧结条件对显微结构和介电性能都有不可忽视的影响．对用一步预煅烧法和二步预煅烧法得到的样品的介电性能和其他性能进行了比较，并对其差异产生的可能机制进行了讨论．

关键词: 铌铁酸铅, 铌镁酸铅, 前驱体, 二元体系, 显微结构, 介电性能

Abstract: The binary system of Pb(Fe_1/2Nb_1/2)O₃(PFN)--Pb(Mg_1/3Nb_2/3)O₃(PMN) was investigated into the effects of different precursor process routes on the
microstructrure and dielectric properties by using X-ray diffraction (XRD), scanning electron microscope (SEM), transmission electron microscope (TEM), energy
dispersion spetrometer (EDS) and dielectric measurements. It is concluded that for the binary system (1-x)PFN-xPMN, the change of Curie temperature is
approximately linear with respect to PMN content in the range of interest (x=0-0.5). With the increase of x, the Curie points shift to lower temperatures. And the
dielectric maximum (ε_max) decreases with increasing x. Both calcining and sintering conditions have non-negligible influence on microstructure
and dielectric properties. Dielectric and other properties were compared for samples prepared by single-step and two-step precalcination route and the possible mechanisms
leading to the differences were discussed.

Key words: PFN, PMN, precursor, binary system, microstructure, dielectric property

中图分类号:

TM282

喻佑华,冯楚德,杨毅,李承恩,晏海学. 前驱体制备途径对PFN-PMN二元铅基铁电陶瓷性能的影响[J]. 无机材料学报.

YU You-Hua,FENG Chu-De,YANG Yi,LI Cheng-En,YAN Hai-Xue. Effects of Various Precursor Process Routes on the Properties of Lead-Based Ferroelectric Ceramics in PFN-PMN Binary System[J]. Journal of Inorganic Materials.

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