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- Title
Densification, phase composition, and properties of borosilicate glass composites containing nano-alumina and titania.
- Authors
El-Kheshen, A. A.; Zawrah, M. F.; Awaad, M.
- Abstract
Five samples of glass/ceramic composites were prepared from borosilicate glasses and both nano-aluminum oxide and nano-titanium oxide. The glass composite samples contain 10, 20, 30, 40, 50 wt.% of alumina and titania mixture. The ratio of Al2O3:TiO2 in the mixture was 1:1. The formation of cristobalite in the glass matrix of low firing glass/ceramic composite substrates limits the efficiency of the ceramic substrate when it is used in circuit boards. In the present study, addition of both alumina and titania to a borosilicate glass as a ceramic filler caused the diffusion of alumina and titania phases (anatase and rutile) constituents into the glass matrix and prevented the formation of a cristobalite. Addition of both the ceramics suppresses cristobalite formation more effectively than one of them used alone and results in lower dielectric constant and thermal expansion coefficients.
- Subjects
COMPOSITE materials research; TITANIUM dioxide; ALUMINUM oxide; CRISTOBALITE; SINTER (Metallurgy); DIELECTRICS research
- Publication
Journal of Materials Science: Materials in Electronics, 2009, Vol 20, Issue 7, p637
- ISSN
0957-4522
- Publication type
Article
- DOI
10.1007/s10854-008-9778-y