Substitution of CaO by BaO to improve the microwave dielectric properties of CaO-Li2O-Sm2O3-TiO2 ceramics

被引：14
|
作者：
Chen, YC
Cheng, PS
Yang, CF
Tzou, WC
机构：
[1] Chinese AF Acad, Dept Elect Engn, Kaohsiung 82012, Taiwan
[2] Natl Sun Yat Sen Univ, Dept Elect Engn, Kaohsiung, Taiwan
来源：
CERAMICS INTERNATIONAL | 2001年 / 27卷 / 07期
关键词：
microwave properties; CaO-Li2O-Sm2O3-TiO2; ceramics; CaO; BaO additions;
D O I：
10.1016/S0272-8842(01)00034-7
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：
Sintered CaO-Li2O3-Sm2O3-TiO2(16:9:12:63) composition (CLST) at 1325 degreesC shows microwave dielectric properties: epsilon (r)=104.1, Q*f value=4320 GHz, and tau (F)=13.2 ppm/C-2. When BaO is used to substitute CaO in the CLST composition to form CaO-BaO-Li2O-Sm2O3-TiO2=16-x:x:9:12:63 (x=2 and 4 for CBLST2 and CBLST4), the sintered CBLST2 and CBLST4 ceramics show coexistence of two phases. the perovskite CaO-Li2O3-Sm2O3-TiO2 (CLST) phase and BaSm2Ti4O12 (BST). As the BaO content increases from 0 to 4 mol%, the dielectric constant of CBLST ceramics decreases from 104.1 to 94.5, the Q*f value increases from 4320 to 6740, and the tau (f) value changes from 13.2 to 3.24 ppm/degreesC. (C) 2001 Elsevier Science Ltd and Techna S.r.l. All rights reserved.
引用
收藏
页码：809 / 813
页数：5
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