Stock material or miscellaneous articles – Composite – Of silicon containing
Patent
1992-12-18
1995-04-18
Mai, Ngoclan T.
Stock material or miscellaneous articles
Composite
Of silicon containing
75236, 501 89, 423345, 419 17, 419 48, 264 56, 4289122, B32B 1504
Patent
active
054077508
ABSTRACT:
A high purity and high density silicon carbide sintered body is made by controlling an amount of aluminum in an aluminum compound as a sintering additive from more than the solid solution upper limit in silicon carbide, preferably, as aluminum from 0.4 to 0.7% by weight of the total silicon carbide and aluminum compound. The sintered body has a density of 99.9% or more and can have a smooth surface with an average surface roughness of 2 nm or less when polished. Thus, this sintered body is suitable for producing a precise, rigid and heat resistant mirror substrate.
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J. of the American Ceramics Society, vol. 39, No. 11, Dec. 1956, pp. 386-389, "Pressure Sintered Silicon Carbide", R. A. Allegro et al.
Kinoshita Toshiya
Kubo Hiroshi
Mai Ngoclan T.
Nippon Steel Corporation
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