Method for manufacture of high-strength sintered article of subs

Details Method for manufacture of high-strength sintered article of subs Method for manufacture of high-strength sintered article of subs

1981-11-02

1982-12-21

Bell, Mark

Compositions: ceramic

Ceramic compositions

Refractory

264 65, 501 98, C04B 3558

Patent

active

043650228

ABSTRACT:
A high-strength sintered article of chemical substances having the .beta.-silicon nitride type crystal structure is produced by blending 50 to 99.9 weight percent of a .beta.-silicon nitride and/or .beta.'-Sialon and 50 to 0.1 weight percent of a mixture, as a sintering aid, consisting of BeO, Ga.sub.2 O.sub.3, and Al.sub.2 O.sub.3 in respective amounts such as to have a Ga.sub.2 O.sub.3 /BeO ratio in the range of from 2.8 to 9.4, an Al.sub.2 O.sub.3 /BeO ratio in the range of from 0.0 to 2.6, and an Al.sub.2 O.sub.3 /Ga.sub.2 O.sub.3 ratio in the range of from 0.0 to 1.1, all ratios being ratios by weight and sintering the resultant blend.

REFERENCES:
patent: 3821005 (1974-06-01), Layden
patent: 4119689 (1978-10-01), Prochazka et al.
patent: 4134947 (1979-01-01), Oda et al.

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