High alumina sintered body

Details High alumina sintered body High alumina sintered body

1984-11-06

1986-06-17

Dixon, Jr., William R.

Compositions: ceramic

Ceramic compositions

Refractory

501127, 501 5, 428332, 428699, 428701, C04B 3518, C03C 1004, B32B 904

Patent

active

045956650

ABSTRACT:
A high alumina sintered body composed of a substrate consisting substantially of .alpha.-Al.sub.2 O.sub.3 and a surface layer of mullite precipitated in situ on the substrate. The sintered body is obtained by molding and sintering a composition comprising a main component containing at least 75% by weight, based on the total weight of the composition, of .alpha.-Al.sub.2 O.sub.3 and a predetermined amount of silica, a mullite mineralyzing agent and B.sub.2 O.sub.3. The sintered body has a combination of excellent thermal shock resistance and mechanical properties such as flexural strength.

REFERENCES:
patent: 3808013 (1974-04-01), Manigault
patent: 3879210 (1975-04-01), LaBar
patent: 4272500 (1981-06-01), Eggerding et al.

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