Mn改性Na0.5Bi2.5Nb2O9高温压电陶瓷的研究

doi:10.3724/SP.J.1077.2012.11660

无机材料学报 ›› 2012, Vol. 27 ›› Issue (8): 827-832.DOI: 10.3724/SP.J.1077.2012.11660

Mn改性Na_0.5Bi_2.5Nb₂O₉高温压电陶瓷的研究

江向平, 温佳鑫, 陈超, 涂娜, 李小红

(景德镇陶瓷学院材料工程系, 江西省先进陶瓷材料重点实验室, 景德镇333001)

收稿日期:2011-10-24 修回日期:2011-12-10 出版日期:2012-08-20 网络出版日期:2012-07-09
基金资助:
国家自然科学基金(50862005、51062005、91022027); 江西省高等学校“先进陶瓷材料”科技创新团队; 江西省主要学科学术和技术带头人培养对象计划项目(2010DD00800); 江西省教育厅项目(GJJ11196、GJJ11197、GJJ11204)

Piezoelectric Properties of Mn-modified Na_0.5Bi_2.5Nb₂O₉ for High Temperature Applications

JIANG Xiang-Ping, WEN Jia-Xin, CHEN-Chao, TU-Na, LI Xiao-Hong

(Jiangxi Key Laboratory of Advanced Ceramic Materials, Department of Material Science and Engineering, Jingdezhen Ceramic Institute, Jingdezhen 333001, China)

Received:2011-10-24 Revised:2011-12-10 Published:2012-08-20 Online:2012-07-09
Supported by:
National Natural Science Foundation of China (50862005, 51062005, 91022027); Jiangxi Colleges and Universities “Advanced Ceramics” Scientific and Technological Innovation Team; Foundation of Training Academic and Technical Leaders for Main of Jiangxi (2010DD00800); Foundation of Jiangxi Provincial Department of Education (GJJ11196, GJJ11197, GJJ11204)

摘要/Abstract

摘要： 采用固相法获得了Mn改性的Na_0.5Bi_2.5Nb₂O₉(NBN+xmol%MnCO₃, 0≤x≤10.0)铋层状压电陶瓷, 并系统地研究了Mn(掺杂)对NBN基陶瓷显微结构与电性能的影响. 结果表明, 所有获得的样品都是居里点在700℃以上的单一相铁电体. 加入Mn显著地提高了NBN系列陶瓷的机械品质因素Q_m, 明显改善了陶瓷的压电与机电性能. 当MnCO₃掺杂量为8.0mol%时, 陶瓷获得最佳电性能: tanδ=0.749%, d₃₃=20 pC/N, Q_m=3120, k_p=12.37%, k_t=21.09%, P_r=7.01 μC/cm². NBN+xmol% MnCO₃(x=8.0)陶瓷经700℃退极化处理后, 其d₃₃保持为原来的75%(~15 pC/N), 表明该材料在高温领域下具有良好的应用前景.

关键词: 压电陶瓷, 微观结构, 机电性能, 铁电性能, Na_0.5Bi_2.5Nb₂O₉

Abstract: Bismuth layer-structured ferroelectric ceramics Na_0.5Bi_2.5Nb₂O₉(NBN+xmol% MnCO₃, 0≤x≤10.0) were synthesized by traditional solid state reaction. The effects of Mn addition on the microstructure and electrical properties of ceramics were investigated in detail. The results showed that all the ceramic samples were single-phase ferroelectrics with high Curie points (T_c≥700℃). With the addition of MnCO₃, the mechanical quality factor, piezoelectric activity and electromechanical properties of Na_0.5Bi_2.5Nb₂O₉-based ceramics are enhanced significantly. Besides, the NBN+8.0mol% MnCO₃ ceramic exhibits the optimum electrical properties: tanδ=0.749%, d₃₃=20 pC/N, Q_m=3120, k_p=12.37%, kt=21.09%, Pr=7.01 μC/cm². After annealing at 700℃, the d₃₃ value of NBN+8.0mol% MnCO₃ ceramic remains 75%(~15 pC/N), which indicates that this ceramic is a promising material for high temperature applications.

Key words: piezoelectric ceramics, microstructure, electromechanical properties, ferroelectric properties; Na_{0. 5}Bi_2.5Nb₂O₉

中图分类号:

TQ174

江向平, 温佳鑫, 陈超, 涂娜, 李小红. Mn改性Na_0.5Bi_2.5Nb₂O₉高温压电陶瓷的研究[J]. 无机材料学报, 2012, 27(8): 827-832.

JIANG Xiang-Ping, WEN Jia-Xin, CHEN-Chao, TU-Na, LI Xiao-Hong. Piezoelectric Properties of Mn-modified Na_0.5Bi_2.5Nb₂O₉ for High Temperature Applications[J]. Journal of Inorganic Materials, 2012, 27(8): 827-832.

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Mn改性Na_0.5Bi_2.5Nb₂O₉高温压电陶瓷的研究

Piezoelectric Properties of Mn-modified Na_0.5Bi_2.5Nb₂O₉ for High Temperature Applications

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