Bi1.5-xCaxZnNb1.5O7陶瓷结构、介电性能与结晶化学特性

doi:10.3724/SP.J.1077.2012.12033

无机材料学报 ›› 2012, Vol. 27 ›› Issue (11): 1164-1168.DOI: 10.3724/SP.J.1077.2012.12033 CSTR: 32189.14.SP.J.1077.2012.12033

Bi_1.5-xCa_xZnNb_1.5O₇陶瓷结构、介电性能与结晶化学特性

王红妮, 丁士华, 宋天秀, 涂伟, 张静

(西华大学材料科学与工程学院, 成都 610039)

收稿日期:2012-01-13 修回日期:2012-03-31 出版日期:2012-11-20 网络出版日期:2012-10-25
作者简介:王红妮(1986–), 女, 硕士研究生. E-mail: wanghn888@163.com
基金资助:
国家自然科学基金(11074203); 研究生创新基金(Ycjj201152)

Structure, Dielectric and Crystal Chemistry Properties of Bi_1.5-xCa_xZnNb_1.5O₇ Ceramics

WANG Hong-Ni, DING Shi-Hua, SONG Tian-Xiu, TU Wei, ZHANG Jing

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

Received:2012-01-13 Revised:2012-03-31 Published:2012-11-20 Online:2012-10-25
About author:WANG Hong-Ni. E-mail: wanghn888@163.com
Supported by:
National Natural Science Foundation of China (11074203); The Graduate Innovation Foundation of Xihua University (Ycjj201152)

摘要/Abstract

摘要： 采用固相反应法制备Bi_1.5-xCa_xZnNb_1.5O₇ (0≤x≤0.50, BCZN)陶瓷, 研究Ca²⁺替代Bi³⁺对Bi_1.5ZnNb_1.5O₇陶瓷烧结特性、显微结构、介电性能和结晶化学特性的影响. 结果表明: 替代量x≤0.25 mol时, 样品为单一的α-BZN相. 随着Ca²⁺替代量增加, 样品最佳烧结温度从1000℃升高到1020℃; 致密度从7.011 g/cm³减小到6.353 g/cm³; 样品晶粒尺寸、晶格常数、电阻率均减小; 结晶化学参数键价和, AV(O')[Bi₄]、AV(O')[Bi₃Zn]、AV(O')[Bi₂Zn₂]和AV(O')[Ca₃Zn]均增大, 且该行为与其晶格常数、介电性能变化相吻合.

关键词: Bi_1.5-xCa_xZnNb_1.5O₇陶瓷, 晶格常数, 介电性能, 键价理论

Abstract: Bi_1.5-xCa_xZnNb_1.5O₇(0.00≤x≤0.50, BCZN) ceramics were prepared by solid phase reaction. The effects of Ca²⁺ substituting Bi³⁺ on the sintering properties, microstructure, dielectric and crystal chemistry properties of Bi_1.5ZnNb_1.5O₇ based ceramics were investigated. The results revealed that when x≤0.25 mol, crystal structure of Bi_1.5-xCa_xZnNb_1.5O₇ ceramics via X-ray diffraction(XRD) was pure α-BZN phase. With the amount of Ca²⁺ ion increasing, the sintering temperature increased from 1000℃ to 1020℃, the density decreased from 7.011 g/cm³ to 6.353 g/cm³; and the grain size, lattice constant, resistivity all gradually decreased. For the crystal chemistry parameters, with the amount of Ca²⁺ ion increasing, AV(O')[Bi₄], AV(O')[Bi₃Zn], AV(O')[Bi₂Zn₂], AV(O')[Ca₃Zn] all gradually increased, which coincided with the changes of lattice constant and dielectric properties.

Key words: Bi_1.5-xCa_xZnNb_1.5O₇ ceramics, lattice constant, dielectric properties, bond valence theory

中图分类号:

TQ174

王红妮, 丁士华, 宋天秀, 涂伟, 张静. Bi_1.5-xCa_xZnNb_1.5O₇陶瓷结构、介电性能与结晶化学特性[J]. 无机材料学报, 2012, 27(11): 1164-1168.

WANG Hong-Ni, DING Shi-Hua, SONG Tian-Xiu, TU Wei, ZHANG Jing. Structure, Dielectric and Crystal Chemistry Properties of Bi_1.5-xCa_xZnNb_1.5O₇ Ceramics[J]. Journal of Inorganic Materials, 2012, 27(11): 1164-1168.

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Bi_1.5-xCa_xZnNb_1.5O₇陶瓷结构、介电性能与结晶化学特性

Structure, Dielectric and Crystal Chemistry Properties of Bi_1.5-xCa_xZnNb_1.5O₇ Ceramics

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