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Cristobalite growth inhibitor in Pyrex borosilicate glass—gallium oxide

Published online by Cambridge University Press:  31 January 2011

Jau-Ho Jean  and
Tapan K. Gupta
Jau-Ho Jean
Affiliation:
Alcoa Electronic Packaging, Inc., San Diego, California 92127
Tapan K. Gupta
Affiliation:
Alcoa, Alcoa Center, Pennsylvania 15069
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Abstract

The effect of gallium oxide on cristobalite formation in Pyrex borosilicate glass has been studied. XRD results show that with 20 vol.% gallium oxide, the precipitation of cristobalite at 800 °C is completely prevented. This result is further evidenced by the linear thermal expansion measurement, in which, in contrast to the system without a sufficient amount of gallium oxide (0–10 vol.%), the thermal expansion coefficient of the composite with 20 vol.% gallium oxide remains unchanged with sintering time at the temperature investigated and, moreover, is very close to the theoretically calculated value.

Type
Rapid Communications
Information
Journal of Materials Research , Volume 8 , Issue 8 , August 1993 , pp. 1767 - 1769
Copyright
Copyright © Materials Research Society 1993

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References

REFERENCES

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