Compositions of MgTiO3-CaTiO3 ceramic with two borosilicate glasses for LTCC technology

被引:227
作者
Jantunen, H
Rautioaho, R
Uusimäki, A
Leppävuori, S
机构
[1] Univ Oulu, Microelect Lab, FIN-90014 Oulu, Finland
[2] Univ Oulu, EMPART Res Grp, Infotech Oulu, FIN-90014 Oulu, Finland
[3] Univ Oulu, Mat Engn Lab, FIN-90014 Oulu, Finland
基金
芬兰科学院;
关键词
dielectric properties; glass ceramics; MgTiO3-CaTiO3; sintering; substrates;
D O I
10.1016/S0955-2219(00)00145-X
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
Mixtures of ZnO-SiO2-B2O3/MgTiO3-CaTiO3 (ZSB/MMT-20) and BaO-SiO2-B2O3/MgTiO3-CaTiO3 (BSB/MMT-20) have been investigated as new candidates for LTCC dielectric materials. Two-stage sintering behaviour was observed in both materials, starting at around 600 and 850 degreesC. Nearly full density (97%) was achieved in ZSB/MMT-20 after sintering at 900 degreesC, while a high porosity of 23% was measured in BSB/MMT-20 after firing at 875 degreesC followed by partial melting of samples during sintering at 900 degreesC. After firing, fully crystalline structure with phases of ZnTiO3, Zn2SiO4, Mg4/3Zn2/3B2O5 and TiO2 were found in ZSB/MMT-20, while the structure of BSB/MMT-20 consisted of crystalline TiO2 and BaTi(BO3)(2) and amorphous SiBa(BO3)(2) and SiB2O5 ZSB/MMT-20 fired at 900 degreesC showed promising microwave properties having the dissipation factor of 0.001 and a permittivity of 10.6 at 7 GHz. The corresponding values for BSB/MMT-20 fired at 875 degreesC were 0.002 and 8.2, respectively. (C) 2000 Elsevier Science Ltd. All rights reserved.
引用
收藏
页码:2331 / 2336
页数:6
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