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

Citation
H. Jantunen et al., Compositions of MgTiO3-CaTiO3 ceramic with two borosilicate glasses for LTCC technology, J EUR CERAM, 20(14-15), 2000, pp. 2331-2336
Citations number
11
Language
INGLESE
art.tipo
Article
Categorie Soggetti
Apllied Physucs/Condensed Matter/Materiales Science","Material Science & Engineering
Journal title
JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
ISSN journal
0955-2219 → ACNP
Volume
20
Issue
14-15
Year of publication
2000
Pages
2331 - 2336
Database
ISI
SICI code
0955-2219(200012)20:14-15<2331:COMCWT>2.0.ZU;2-I
Abstract
Mixtures of ZnO-SiO2-B2O3/MgTiO3-CaTiO3 (ZSB/MMT-20) and BaO-SiO2-B2O3/MgTi O3-CaTiO3 (BSB/MMT-20) have been investigated as new candidates for LTCC di electric materials. Two-stage sintering behaviour was observed in both mate rials, starting at around 600 and 850 degreesC. Nearly full density (97%) w as achieved in ZSB/MMT-20 after sintering at 900 degreesC, while a high por osity of 23% was measured in BSB/MMT-20 after firing at 875 degreesC follow ed by partial melting of samples during sintering at 900 degreesC. After fi ring, 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) a nd SiB2O5 ZSB/MMT-20 fired at 900 degreesC showed promising microwave prope rties 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 reser ved.