Modified cordierite glass ceramic composite

Details Modified cordierite glass ceramic composite Modified cordierite glass ceramic composite

C - Chemistry, Metallurgy

03

C

261/1, 49/92

C03C 10/08 (2006.01) C03C 10/00 (2006.01) C03C 14/00 (2006.01)

Patent

CA 1260504

MODIFIED CORDIERITE GLASS CERAMIC COMPOSITE ABSTRACT OF THE DISCLOSURE A composite glass ceramic material which comprises silicon nitride (Si3N4) whiskers, in a glass ceramic material comprising nitrogen doped cordierite, which composite material has greatly increased strength at elevated temperatures, good microwave transparency, and good thermal shock resistance. The invention further comprises a method for manufacturing the composite material by blending ground nitrogen doped cordierite glass with between about 5 and about 50 percent Si3N4 whiskers by weight of glass. The blend is then formed into a desired shape and is sintered at an elevated temperature of from about 1000 to 1400°C. The invention also includes the novel nitrogen doped cordierite glass and glass ceramic made therefrom.

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