(1-x)CaTiO_3-xLaAlO_3陶瓷的微波介电性能研究  

Microwave Dielectric Properties of(1-x) CaTiO_3-xLaAlO_3 Ceramics

作　　者：赵小玻[1] 高勇[1] 侯立红[1] 宋涛[1] 王营营[1] 张萍萍[1] 车松蔚[1] 鲍晓芸 

机构地区：[1]山东工业陶瓷研究设计院有限公司,淄博255031

出　　处：《人工晶体学报》2014年第10期2625-2629,共5页Journal of Synthetic Crystals

摘　　要：通过传统的固相反应法制备了(1-x)CaTiO3-xLaAlO3陶瓷,系统地研究了LaAlO3含量的变化对陶瓷的晶体结构、微观结构和微波介电性能的影响。结果表明,LaAlO3含量的增加导致(1-x)CaTiO3-xLaAlO3陶瓷的晶格结构发生畸变,使得陶瓷的介电常数下降、Q·f值增加,并使其谐振频率温度系数向负值处发生偏移。LaAlO3的含量为x=0.33时,(1-x)CaTiO3-xLaAlO3陶瓷的烧结温度为1460℃,展示了良好的微波介电性能:εr=45.3、Q·f=36218 GHz、τf=-0.5 ppm/℃。（ 1-x） CaTiO3-xLaAlO3 ceramics were prepared by the conventional solid-state reaction method. The effects of LaAlO3 content on the microstructures,crystal structures,and microwave dielectric properties of the ceramics were studied systematically. The results show that lattice structure distorted,and the dielectric constant decreases,Q·f value increases,temperature coefficent of resonance frequency shift to nagative as the LaAlO3 doping content increasing. Good combination of microwave dielectric properties was obtained for 0.33CaTiO3-0. 67LaAlO3 ceramic sintered at 1460 ℃,where εr= 45. 3,Q·f = 36218 GHz and τf=- 0. 5ppm/℃.

关 键 词：固相反应法 微波介质陶瓷 CaTiO3-LaAlO3 介电性能 

分 类 号：TM28[一般工业技术—材料科学与工程]