(Ba1-xCax)(Ti0.82Zr0.18)O3陶瓷结构与介电性能研究

doi:10.3724/SP.J.1077.2011.00655

无机材料学报 ›› 2011, Vol. 26 ›› Issue (6): 655-658.DOI: 10.3724/SP.J.1077.2011.00655

(Ba_1-xCa_x)(Ti_0.82Zr_0.18)O₃陶瓷结构与介电性能研究

那文菊, 丁士华, 宋天秀, 王久石, 王岩

(西华大学材料科学与工程学院, 成都 610039)

收稿日期:2010-09-03 修回日期:2010-10-23 出版日期:2011-06-20 网络出版日期:2011-06-07
作者简介:那文菊(1985-), 女, 硕士研究生. E-mail: nawju8587@126.com
基金资助:
国家自然科学基金(11074203); 西华大学人才基金(R0620109); 材料学重点学科(XZD0814-09-1); 西华大学研究生创新基金(YCJJ200924)

Study of Structure and Dielectric Properties of (Ba_1-xCa_x)(Ti_0.82Zr_0.18)O₃ Ceramics

NA Wen-Ju, DING Shi-Hua, SONG Tian-Xiu, WANG Jiu-Shi, WANG Yan

(College of Materials Science & Engineering, Xihua University, Chengdu 610039, China)

Received:2010-09-03 Revised:2010-10-23 Published:2011-06-20 Online:2011-06-07
Supported by:
National Natural Science foundation of China (11074203); Talents foundation of Xihua university (R0620109); Key Disciplinary of Materials Science (XZD0814-09-1); Innovation Fund of Postgraduate, Xihua University (YCJJ200924)

摘要/Abstract

摘要： 采用固相反应法制备了(Ba_1-xCa_x)(Ti_0.82Zr_0.18)O₃(BCZT, 0≤x≤0.26)陶瓷, 研究了Ca²⁺掺杂对BCZT陶瓷微观结构和介电性能的影响. 结果表明: 当Ca²⁺掺杂量为0.16时, BCZT陶瓷出现第二相CaTiO₃, 其四方率c/a随Ca²⁺掺杂量的增加先减小再增大, 当Ca²⁺掺杂量为0.06时达到最小值1.00276. 通过容差因子和晶格参数的计算确认了Ca²⁺已进入到A位; 随Ca²⁺掺杂量的增加, 晶粒得到细化, 居里温度向低温方向移动, 介电峰被压低并展宽, 且逐渐呈现铁电弥散性.

关键词: BCZT陶瓷, 固溶度, 四方率c/a, 介电性能

Abstract: (Ba_1-xCa_x)(Ti_0.82Zr_0.18)O₃(BCZT, 0≤x≤0.26) ceramics was prepared by a solid phase reaction. The effect of Ca²⁺ doping on the microstructure and dielectric properties of the ceramics was studied. Results showed that the solid solubility lay around x=0.16 for BCZT ceramics while the second phase was observed. The value of c/a changed as the U-type curve with the variation of the Ca²⁺, and the minimum of the c/a was 1.00276 at x=0.06. It was found that Ca²⁺ ion substitution can be almost incorporated into the A site by the calculation of the tolerance factor and lattice constant. With increasing Ca²⁺ ion content, the grain size was decreased. The Curie temperature was shifted to low temperature, and the εr-T peak was decreased and broaden. The relaxor characteristics were obtained while Ca²⁺ ion content was further increased.

Key words: BCZT ceramics, solid solubility, tetragonality of c/a, dielectric properties

中图分类号:

TM22

那文菊, 丁士华, 宋天秀, 王久石, 王岩. (Ba_1-xCa_x)(Ti_0.82Zr_0.18)O₃陶瓷结构与介电性能研究[J]. 无机材料学报, 2011, 26(6): 655-658.

NA Wen-Ju, DING Shi-Hua, SONG Tian-Xiu, WANG Jiu-Shi, WANG Yan. Study of Structure and Dielectric Properties of (Ba_1-xCa_x)(Ti_0.82Zr_0.18)O₃ Ceramics[J]. Journal of Inorganic Materials, 2011, 26(6): 655-658.

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(Ba_1-xCa_x)(Ti_0.82Zr_0.18)O₃陶瓷结构与介电性能研究

Study of Structure and Dielectric Properties of (Ba_1-xCa_x)(Ti_0.82Zr_0.18)O₃ Ceramics

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