Densification and microwave dielectric properties of CaO-B2O3-SiO2 system glass-ceramics

被引:122
作者
Chiang, Chuang-Chung [1 ]
Wang, Sea-Fue [1 ]
Wang, Yuh-Ruey [1 ]
Wei, Wen-Cheng J. [2 ]
机构
[1] Natl Taiwan Univ Technol, Dept Mat & Mineral Resource Engn, Taipei 106, Taiwan
[2] Natl Taiwan Univ, Dept Mat Sci & Engn, Taipei 106, Taiwan
关键词
glass-ceramics; LTCC; microwave properties; CaO-B2O3-SiO2;
D O I
10.1016/j.ceramint.2006.12.008
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
In order to relieve the narrow processing window and poor material compatibility in practical applications as well as understand the microwave dielectric properties, investigation on the formulations of CaO/B2O3/SiO2 glasses on their structure, thermal properties, and microwave properties were performed in this study. Six glasses with different molar ratios of CaO/B2O3/SiO2 (designed as CBS-3, CBS-5, CBS-7, CBS-8, CBS-9, and CBS-10) were prepared and pulverized. Results indicate that most softening points of glasses are ranging from 680 to 710 degrees C. They were sintered at different temperatures to reach maximum densification. Among various glass formulations, CBS-9 glass-ceramic containing the largest amount of SiO2 has the lowest CTE. The dielectric constants can be divided into two groups including around 4-5 and 7-8, and the dielectric losses (tan 3) are all below 0.005 in the frequency of approximate to 10 GHz. The dielectric constants and dielectric losses are generally frequency dependent. For CBS-9 glass-ceramic, the dielectric constant and dielectric loss at 4.7 and 18.6 GHz are 4.13 and 0.0018, and 4.20 and 0.0063, respectively. (C) 2007 Elsevier Ltd and Techna Group S.r.l. All rights reserved.
引用
收藏
页码:599 / 604
页数:6
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