CaTiO3基微波介质陶瓷的频率温度稳定性

沈杰; 周静; 石国强; 杨文才; 刘韩星; 陈文

doi:10.7498/aps.62.117702

摘要

通过对克劳修斯-莫索蒂方程的近似, 分析了钙钛矿结构微波介质陶瓷频率温度系数 (τf) 的主要影响因素, 发现改变材料介电响应中离子位移极化和电子位移极化的比例, 可调节频率温度系数的正负与大小. 通过电子结构计算和容忍因子分析, 预测引入(Zn1/3Nb2/3)4+对具有正温度系数的CaTiO3进行B位取代将提高材料电子极化响应比例, 调节τf由正变负. 采用偏铌酸盐为前驱体, 通过固相反应法合成了Ca[(Zn1/3Nb2/3)xTi(1-x)]O3钙钛矿结构陶瓷, 并对其进行结构分析和性能测试, 实验结果与理论分析一致, 获得了具有近零频率温度系数的Ca[(Zn1/3Nb2/3)0.7Ti0.3]O3介质陶瓷材料.

关键词:

Abstract

The determinants of resonant frequency temperature coefficient (τf) have been analyzed by the approximate treatment of Clausius-Mossotti equation. It is suggested that the value of τf can be adjusted by changing the contribution proportion of ionic polarization or electronic polarization for the dielectric constant. Results of electronic structure calculation and tolerance factor analysis show that B-site substitution of CaTiO3 with (Zn1/3Nb2/3)4+ could turn the value of τf from positive to negative, by enhancing the covalency in the BO6 octahedron and improving the contribution proportion of electronic polarization. Ca[(Zn1/3Nb2/3)xTi(1-x)]O3 dielectric ceramics were prepared by solid-state reaction method with niobate as precursor. Results of structure analysis and property measurement conform to the theoretical analysis. The Ca[(Zn1/3Nb2/3)0.7Ti0.3]O3 dielectric ceramic with near-zero τf was obtained.

Keywords:

B-site complex perovskite ceramics /
resonant frequency-temperature stability /
polarization /
BO6octahedron tilting

作者及机构信息

1.
武汉理工大学材料复合新技术国家重点实验室, 武汉 430070;

2.
武汉理工大学特种功能材料技术教育部重点实验室, 武汉 430070;

3.
武汉理工大学材料科学与工程学院, 武汉 430070

基金项目: 国家自然科学基金重点 (批准号: 50932004)、国家自然科学基金项目 (批准号: 51102191, 51072148)、国家自然科学基金国际 (地区) 合作与交流项目 (批准号: 51161140399)、教育部新世纪优秀人才支持计划 (批准号: NCET-09-0628)、教育部高等学校博士学科点专项科研基金项目 (批准号: 20101431200172010)、中央高校基本科研业务费专项资金 (批准号: 2012-II-016) 和武汉市科学技术计划项目(批准号: 2013010501010137) 资助的课题.

Authors and contacts

1.
State Key Laboratory of Advanced Technology for Materials Synthesis and Processing, Wuhan University of Technology, Wuhan 430070, China;

2.
Key Laboratory of Advanced Technology for Specially Functional Materials, Wuhan University of Technology, Wuhan 430070, China;

3.
School of Materials Science and Engineering, Wuhan University of Technology, Wuhan 430070, China

Funds: Project supported by the Key Program of the National Natural Science Foundation of China (Grant No. 50932004), the National Natural Science Foundation of China (Grant Nos. 51102191, 51072148), the Funds for International Cooperation and Exchange of the National Natural Science Foundation of China (the A3 Foresight Program-No. 51161140399), the Program for New Century Excellent Talents in University of Ministry of Education of China (Grant No. NCET-09-0628), the Specialized Research Fund for the Doctoral Program of Higher Education of China (Grant No. 20101431200172010), the Fundamental Research Funds for the Central Universities of Ministry of Education of China (Grant No. 2012-II-016) and the Science and Technology Program of Wuhan, China (Grant No. 2013010501010137).

参考文献

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施引文献

[1]	Ying H, Zhang Q L, Wang J B, You Y, Huang W 2003 J. Chin. Ceram. Soc. 31 965 (in Chinese) [杨辉, 张启龙, 王家邦, 尤源, 黄伟 2003 硅酸盐学报 31 965]
[2]	Zhu J H, Liang F, Wang X H, Lv W Z 2005 Electron. Compon. Mater. 24 32(in Chinese) [朱建华, 梁飞, 汪小红, 吕文中 2005 电子元件与材料 24 32]
[3]	Reaney I M, Wise P, Ubic R, Breeze J, McN Alford N , Iddles D, Cannell D, Price T 2001 Philos. Mag. A 81 501
[4]	Pashkin A, Kamba S, Berta M, Petzelt J, Csete de Györgyfalva G D C, Zheng H, Bagshaw H, Reaney I M 2005 J. Phys. D: Appl. Phys. 38 741
[5]	Hirotaka O, Hidekazu T, Akinori K, Akinori F, Georgios Z 2005 J. Eur. Ceram. Soc. 25 2859
[6]	Bosman A J, Havinga E E 1963 Phys. Rev. 129 1593
[7]	Buttner R H, Maslen E N 1992 Acta Crystallogr. Sect. B: Struct. Sci. 48 644
[8]	Liu D, Hou R Z, Xu X, Li X Q 2004 J. Am. Ceram. Soc. 87 2208
[9]	Wang Z L, Kang Z C 2002 Functional and Smart Materials-Structure Evolution and Structure Analysis (Beijing: Science Press) p87 (in Chinese) [王中林, 康振川 2002 功能与智能材料结构演化与结构分析 (北京: 科学出版社) 第87页]
[10]	Reaney I M, Colla E L, Setter N 1994 J. Appl. Phys. 33 3984
[11]	Moreira R L, Dias A 2005 J. Eur. Ceram. Soc. 25 2843
[12]	Shannon R D 1976 Acta Crystallogr. Sect. A: Found. Crystallogr. 32 751
[13]	Jahn H A, Teller E 1937 Math. Phys. Sci. 161 220
[14]	Shannon R D 1993 J. Appl. Phys. 73 348
[15]	Hu M Z, Zhou D X, Jiang L S, Cai X Q, Huang J 2005 J. Inorg. Mater. 20 126 (in Chinese) [胡明哲, 周东祥, 姜胜林, 蔡雪卿, 黄静 2005 无机材料学报 20 126]

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