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无机材料学报

无机材料学报

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(1-x)CaTiO3-xLi1/2Sm1/2TiO3陶瓷的微波介电性能研究

李月明1, 宋婷婷1, 胡元云2, 彭浩1, 刘维良1   

  1. 1. 景德镇陶瓷学院, 景德镇 333001; 2. 浙江正原电气股份有限公司, 嘉兴 314003
  • 收稿日期:2007-09-14 修回日期:2007-10-26 出版日期:2008-07-20 网络出版日期:2008-07-20

Study on the Microwave Dielectric Properties of (1-x)CaTiO3-x(Li1/2Sm1/2)TiO3 Ceramics

LI Yue-Ming1, SONG Ting-Ting1, HU Yuan-Yun2, PENG Hao1, LIU Wei-Liang1   

  1. 1. Jingdezheng Ceramic Institute, Jingdezhen 333001, China; 2. Zhejiang Zhengyuan Electric Co. Ltd., Jiaxing 314003, China
  • Received:2007-09-14 Revised:2007-10-26 Published:2008-07-20 Online:2008-07-20

PDF (PC)

2122

被引次数

6

摘要：
采用固相法制备了(1-x)CaTiO3-x(Li1/2Sm1/2)TiO3系列微波介质陶瓷材料, 研究了该体系的相组成、烧结性能和微波介电性能之间的关系. 结果表明: 在x=0.1～0.9mol范围内, (1-x)CaTiO3-x(Li1/2Sm1/2)TiO3
体系均形成了单一的斜方钙钛矿结构; x=0.1～0.5和x=0.6～0.9组分的最佳烧结温度分别为1250和1300℃; 介电常数εr、无载品质因数与谐振频率乘积Qf值、谐振频率温度系数τf均随着x的增大而减小. 当x=0.7时, 1300℃下保温5h烧结得到的材料的微波介电性能为: εr=116.5, Qf=3254GHz, τf=42.43×10-6/℃.



关键词: Li1/2Sm1/2TiO3, 钙钛矿, 微波介电性能

Abstract: (1-x)CaTiO3-x(Li1/2Sm1/2)TiO3 microwave dielectric ceramics were prepared by solid sate reaction technique. The crystal structure, sintering properties and microwave dielectric properties of the ceramics were investigated. The results show that a single orthorhombic perovskite structure forms in the x range from 0.1 to 0.9; the best sintering temperatures of (1-x)CaTiO3-x(Li1/2Sm1/2)TiO3 are 1250℃ and 1300℃ in the x range from 0.1 to 0.5 and 0.6 to 0.9, respectively; the dielectric constant εr, the product of quality factor and resonance frequency (Qf ) value and the temperature coefficient of resonant frequency τf decrease with the increasing of x. The Ca0.3(Li1/2Sm1/2)0.7TiO3 ceramic sintered at 1300℃ for 5h exhibits excellent microwave dielectric properties: εr=116.5, Qf=3254GHz, τf=42.43×10-6/℃.



Key words: Li1/2Sm1/2TiO3, perovskite, microwave dielectric properties

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