| Sr替代Ca对Ca_4La_2Ti_5O_(17)微波陶瓷的微结构和介电性能的影响 |
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| 引用本文： | 狄洁昌,陈国华.Sr替代Ca对Ca_4La_2Ti_5O_(17)微波陶瓷的微结构和介电性能的影响[J].电子元件与材料,2012,31(6):6-9,14. |
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| 作者姓名： | 狄洁昌 陈国华 |
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| 作者单位： | 1. 桂林电子科技大学材料科学与工程学院,广西桂林,541004
2. 桂林电子科技大学材料科学与工程学院,广西桂林541004;广西信息材料重点实验室,广西桂林541004 |
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| 基金项目： | 广西自然科学基金资助项目 |
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| 摘 要： | 采用固相反应法制备了Ca4–xSrxLa2Ti5O17(x=0～3)微波介质陶瓷。研究了Sr替代Ca对Ca4La2Ti5O17陶瓷的相纯度、微观结构和介电性能的影响。结果表明,在替代范围内所有样品呈单相固溶体结构,晶格参数和晶胞体积随着x的增加而增大。Sr替代Ca抑制了陶瓷样品的晶粒生长。随着x增加,样品介电常数和谐振频率温度系数逐渐增加,而品质因数逐渐减小。该类材料有望用于微波介质负载天线。
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| 关 键 词： | 微波陶瓷 相纯度 微观结构 介电性能 |
Effects of substitution of Sr for Ca on microstructure and dielectric properties of Ca4La2Ti5O17 microwave ceramics |
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| DI Jiechang
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CHEN Guohua.Effects of substitution of Sr for Ca on microstructure and dielectric properties of Ca4La2Ti5O17 microwave ceramics[J].Electronic Components & Materials,2012,31(6):6-9,14. |
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| Authors: | DI Jiechang CHEN Guohua |
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| Affiliation: | 1,2(1.School of Materials Science and Engineering,Guilin University of Electronic Technology,Guilin 541004,Guangxi Zhuangzu Zizhiqu,China;2.Guangxi Key Laboratory of Information Materials,Guilin 541004,Guangxi Zhuangzu Zizhiqu,China) |
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| Abstract: | Ca4-xSrxLa2Ti5O17(x=0～3)microwave dielectric ceramics were prepared by a solid-state reaction method.The effects of the substitution of Sr for Ca on the phase purity,microstructure and dielectric properties of Ca4La2Ti5O17 ceramics were investigated.The results show that all ceramic samples adopt the single phase solid solution structure within limits of substitution,and the lattice parameters and unit cell volume increase with the increase of x value.The substitution of Sr for Ca restrains the grain growth.With the increase of x value,the permittivity and temperature coefficient of resonant frequency gradually of samples increase while the quality factor decreases.It suggest that this material may be useful in the dielectrically loaded antennas in microwave frequency. |
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| Keywords: | microwave ceramic phase purity microstructure dielectric properties |
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