BiYbO3固溶极限对BSPT压电陶瓷结构和电学性能的影响

doi:10.3724/SP.J.1077.2013.12476

无机材料学报 ›› 2013, Vol. 28 ›› Issue (06): 623-628.DOI: 10.3724/SP.J.1077.2013.12476

BiYbO₃固溶极限对BSPT压电陶瓷结构和电学性能的影响

石维^1,2, 冷森林¹, 龙禹¹, 朱建国², 肖定全²

(1. 铜仁学院物理与电子科学系, 铜仁554300; 2. 四川大学材料科学与工程学院, 成都 610064)

收稿日期:2012-08-02 修回日期:2012-10-29 出版日期:2013-06-20 网络出版日期:2013-05-20
作者简介:石维(1975–), 副教授. E-mail: wlxsw@sina.cn
基金资助:
贵州省科技厅黔科合[2011(2031)]; 贵州省人事厅[TZJF2010041]; 铜仁学院博士启动基金[DS1001]

Effect of BiYbO₃ Solid Solution Limit on Electric Properties and Structure of BSPT Piezoceramics

SHI Wei^1,2, LENG Sen-Lin¹, LONG Yu¹, ZHU Jian-Guo², XIAO Ding-Quan²

(1. Department of Physics and Electronics, College of Tongren, Tongren 554300, China; 2. College of Materials Science and Engineering, Sichuan University, Chengdu 610064, China)

Received:2012-08-02 Revised:2012-10-29 Published:2013-06-20 Online:2013-05-20
About author:SHI Wei. E-mail: wlxsw@sina.cn
Supported by:
Fundation of Science and Technology Department of Guizhou Province [2011(2031)]; Fundation of Personnel Department of Guizhou Province [TZJF2010041]; Doctoral Scientific Fund of College of Tongren [DS1001]

摘要/Abstract

摘要： 采用传统固相反应法制备了yBiYbO₃-(0.36–y)BiScO₃-0.64PbTiO₃(BSYPT-0.64/y)体系压电陶瓷。X射线衍射显示BSYPT-0.64/y陶瓷体系为单一的钙钛矿结构; SEM测试结果显示当y=0.1时陶瓷表面形貌出现异常, 当y=0.14时有大量粒径为0.3~0.5 μm的细小晶粒析出在陶瓷的表面; EDS能谱分析发现细小晶粒主要成分为Bi、Yb、Ti、Sc和O, 表明BiYbO₃的含量超过10%时为BSYPT-0.64/y陶瓷体系的固溶极限区域; 通过BSYPT-0.64/y陶瓷的压电性能、铁电性能测试, 介温特性(T_c~450℃)结果分析发现当y>0.1时, BiYbO₃固溶极限析出是相对孤立的行为, 不是影响BSYPT-0.64/y的结构和电学性能的主要因素, 而其结构和电学性能的降低依赖于Sc/Pb相对含量比的降低导致组分对准同型相界的偏离。

关键词: 固溶极限, 压电陶瓷, 居里温度, 铁电性能

Abstract: yBiYbO₃-(0.36–y)BiScO₃-xPbTiO₃ (BSYPT-0.64/y) piezoelectric ceramics were prepared by traditional solid reaction method. The result of X-ray diffraction shows that the as-prepared BSYPT-0.64/y ceramics have single perovskite structure. However, scanning electron microscopy results show that the surface morphology of BSYPT-0.64/y ceramics becomes abnormal at y=0.1, and a large amount of tiny grains, with the grain size distributing from 0.3 μm to 0.5 μm, separate out on the surface of the ceramics at y=0.14. EDS analysis reveals that the major ingredients of these tiny grains are mainly Bi, Yb, Ti, Sc and O. The solid solution limit is therefore confirmed to be near y=0.1 for the BSYPT-0.64/y ceramics. By means of systematic piezoelectric, ferroelectric and temperature-dependent dielectric (T_c~450℃) characterizations, it is found that the occurrence of solid solubility limit-related BiYbO₃ separation is not a key factor for affecting the electrical properties and structure of the ceramics, but a relatively isolated behavior. The degradation of structural and electrical properties is attributed to the decrease in Sc/Pb ratio when the BiYbO₃ content is increased, which leads to a deviation from MPB in the BSYPT-0.64/y ceramics.

Key words: solid solution limit, piezoelectric ceramics, Curie temperature, ferroelectric propert

中图分类号:

TB34

石维, 冷森林, 龙禹, 朱建国, 肖定全. BiYbO₃固溶极限对BSPT压电陶瓷结构和电学性能的影响[J]. 无机材料学报, 2013, 28(06): 623-628.

SHI Wei, LENG Sen-Lin, LONG Yu, ZHU Jian-Guo, XIAO Ding-Quan. Effect of BiYbO₃ Solid Solution Limit on Electric Properties and Structure of BSPT Piezoceramics[J]. Journal of Inorganic Materials, 2013, 28(06): 623-628.

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BiYbO₃固溶极限对BSPT压电陶瓷结构和电学性能的影响

Effect of BiYbO₃ Solid Solution Limit on Electric Properties and Structure of BSPT Piezoceramics

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