铌镁酸铋-钛酸铅压电陶瓷准同型相界附近的性能和相变温度研究

doi:10.3724/SP.J.1077.2012.11525

无机材料学报 ›› 2012, Vol. 27 ›› Issue (7): 735-740.DOI: 10.3724/SP.J.1077.2012.11525

铌镁酸铋-钛酸铅压电陶瓷准同型相界附近的性能和相变温度研究

洪琳^1,2, 赵丽艳², 朱兴文¹, 郑嘹赢², 曾江涛², 李国荣²

(1. 上海大学电子信息材料系 200072; 2. 中国科学院上海硅酸盐研究所上海 200050)

收稿日期:2011-08-22 修回日期:2011-10-23 出版日期:2012-07-20 网络出版日期:2012-06-06
作者简介:洪琳(1985-), 男, 硕士研究生. E-mail: honglin2012@sina.com
基金资助:
国家自然科学基金重点项目(61137004); 973项目(2012CB619406); 国家自然科学基金国际合作项目(51011120098); 国家自然科学基金委与中国工程物理研究院联合基金(10876041)

Properties and Phase-transition Temperature of (1–x)Bi(Mg_2/3Nb_1/3)O₃-xPbTiO₃ Piezoelectric Ceramics Near the Morphotropic Phase Boundary

HONG Lin^{1, 2}, ZHAO Li-Yan², ZHU Xing-Wen¹, ZHENG Liao-Ying², ZENG Jiang-Tao², LI Guo-Rong²

(1. Department of Electronic Information Materials, Shanghai University, Shanghai 200072, China; 2. Shanghai Institute of Ceramics, Chinese Academy of Sciences, Shanghai 200050, China)

Received:2011-08-22 Revised:2011-10-23 Published:2012-07-20 Online:2012-06-06
About author:HONG Lin. E-mail: honglin2012@sina.com
Supported by:
National Natural Science Foundation in Key Projects (61137004); National Key Project for Basic Research of China (2012CB619406); National Natural Fund International Cooperation Projects (51011120098); NSAF (10876041)

摘要/Abstract

摘要： 利用传统固相烧结法制备了Bi(Mg_2/3Nb_1/3)O₃-PbTiO₃(BMN-PT)压电陶瓷, 分析了不同PbTiO₃含量对BMN-PT压电陶瓷的晶体结构、介电、压电及铁电性能的影响. XRD结果表明: 合成的BMN-PT陶瓷具有纯钙钛矿结构, 并且在PbTiO₃含量为x=0.60时, 其组分的XRD图谱在衍射角2θ=45°出现明显的分峰, 说明该组分相结构中存在三方和四方相的共存. 压电铁电性能显示, BMN-0.60PT有最大的压电常数d₃₃(~170pC/N)和平面机电耦合系数k_p(0.35), 最小的矫顽场E_c(29.4 kV/cm)及最大的剩余极化P_r(31.4 μC/cm²). 确定了BMN-PT压电陶瓷的准同型相界(MPB)为PbTiO₃含量x=0.60的组分. 介电系数温谱表明介电系数峰值温度(Tm)随着PbTiO₃含量的增大而升高, MPB组分的Tm约为276℃.

关键词: 压电陶瓷, 铌镁酸铋钛酸铅, 准同型相界, 相变温度

Abstract: The (1–x)Bi(Mg_2/3Nb_1/3)O₃-xPbTiO₃ (BMN-PT) piezoelectric ceramics were fabricated by a traditional solid-reaction method. The crystal structures, the piezoelectric, dielectric and ferroelectric behaviors of BMN-PT ceramics were investigated as a function of the content of PbTiO₃. XRD results showed that a single perovskite structure was obtained in all ceramic samples. XRD patterns of the samples with PbTiO₃ content x≥0.60 had two obvious divided peaks, which verified that the rhombohedral and tetragonal phase were coexisted. The morphotropic phase boundary (MPB) of BMN-PT material was located at x=0.60. The largest piezoelectric coefficient d₃₃ (170 pC/N), remnant polarization Pr (31.4 μC/cm²), planar electromechanical coupling factor k_p (0.35) and the smallest coercive field E_c were obtained on 0.4BMN-0.6PT. The measurements of dielectric constant ε_r(T) dependencies showed that the maximum ε_r(T) temperature (T_m) increased with the increase of PbTiO₃ content, and Tm was about 276℃ for the MPB composition.

Key words: piezoelectric ceramic, BMN-PT, MPB, phase transition temperature

中图分类号:

TQ174

洪琳, 赵丽艳, 朱兴文, 郑嘹赢, 曾江涛, 李国荣. 铌镁酸铋-钛酸铅压电陶瓷准同型相界附近的性能和相变温度研究[J]. 无机材料学报, 2012, 27(7): 735-740.

HONG Lin, ZHAO Li-Yan, ZHU Xing-Wen, ZHENG Liao-Ying, ZENG Jiang-Tao, LI Guo-Rong. Properties and Phase-transition Temperature of (1–x)Bi(Mg_2/3Nb_1/3)O₃-xPbTiO₃ Piezoelectric Ceramics Near the Morphotropic Phase Boundary[J]. Journal of Inorganic Materials, 2012, 27(7): 735-740.

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铌镁酸铋-钛酸铅压电陶瓷准同型相界附近的性能和相变温度研究

Properties and Phase-transition Temperature of (1–x)Bi(Mg_2/3Nb_1/3)O₃-xPbTiO₃ Piezoelectric Ceramics Near the Morphotropic Phase Boundary

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铌镁酸铋-钛酸铅压电陶瓷准同型相界附近的性能和相变温度研究

Properties and Phase-transition Temperature of (1–x)Bi(Mg2/3Nb1/3)O3-xPbTiO3 Piezoelectric Ceramics Near the Morphotropic Phase Boundary

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Properties and Phase-transition Temperature of (1–x)Bi(Mg_2/3Nb_1/3)O₃-xPbTiO₃ Piezoelectric Ceramics Near the Morphotropic Phase Boundary