Author: El-Kheshen, A.A.

Source: British Ceramic Transactions, Volume 102, Number 5, October 2003 , pp. 205-209(5)

Publisher: Maney Publishing

Abstract:

A series of glass/ceramic composites were prepared from pyrex borosilicate glass with silica. The effects of 15 vol.-% alumina addition on cristobalite formation in this system have been studied. Cristobalite formation in the composites has been found to decrease with addition of alumina, which may be attributed to a strong coupling reaction between Al³⁺ from alumina and K⁺ from pyrex borosilicate glass. The resulting glass/ceramic composites containing alumina have low thermal expansion coefficient owing to the presence of a lower amount of cristobalite in the glass matrix. The formation of cristobalite limits the efficiency of the ceramic substrate when used in circuit boards.

Keywords:

Document Type: Research Article

DOI: http://dx.doi.org/10.1179/096797803225009256

Publication date: 2003-10-01

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