Influence of Li2CO3 additions to CaSiO3-Al2O3 ceramics on sintering temperature and microwave dielectric properties

被引：8

作者：

Yang, Qinghua ^{[1
]}

Wang, Huanping ^{[1
]}

He, Zuopeng ^{[2
]}

Li, Denghao ^{[1
]}

Wang, Qiuhong ^{[1
]}

Xu, Shiqing ^{[1
]}

机构：

[1] China Jiliang Univ, Coll Mat Sci & Engn, Hangzhou 310018, Peoples R China

[2] Semicond Mfg Int Co Ltd, Shanghai 201203, Peoples R China

来源：

JOURNAL OF THE CERAMIC SOCIETY OF JAPAN | 2014年 / 122卷 / 1422期

关键词：

Dielectric properties; CaSiO3; ceramic; Al2O3; Li2CO3; addition; CRYSTALLIZATION CHARACTERISTICS; LOW-PERMITTIVITY; SYSTEM; LI2O-CAO-SIO2; GLASSES; AL2O3;

D O I：

10.2109/jcersj2.122.125

中图分类号：

TQ174 [陶瓷工业]; TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

The effects of Li2CO3 additions on the densification and microwave dielectric properties of CaSiO3-1 wt% Al2O3 ceramics were investigated. With Li2CO3 addition, the densification temperature of CaSiO3-1wt% Al2O3 ceramics could be effectively reduced from 1250 to 925 C. During the sintering process, Li2CO3 existed as a liquid phase and assisted the densification of CaSiO3-1wt% Al2O3 ceramics, and then reacted with CaSiO3 to form Li2Ca3Si6O16 and Li2Ca4Si4O13 second phases. However, the Li2CO3 addition deteriorated the microwave dielectric properties because of the lower quality values of Li2Ca3Si6O16 and Li2Ca4Si4O13 phases. The proper Li2CO3 addition was found to be 2wt%. Under this addition, microwave dielectric properties of epsilon(r) = 7.33, Q x f = 21,904 GHz and tau(f) = -34ppm/degrees C were obtained for the CaSiO3-1wt% Al2O3 ceramic sintered at 975 degrees C for 2 h. (C) 2014 The Ceramic Society of Japan. All rights reserved.

引用

页码：125 / 128

页数：4

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