Insulative ceramic composition

Details Insulative ceramic composition Insulative ceramic composition

1987-07-09

1988-11-08

Dixon, Jr., William R.

Compositions: ceramic

Ceramic compositions

Aluminum compound containing

501128, 501154, C04B 3510

Patent

active

047834315

ABSTRACT:
An insulative ceramic composition comprising from 25 to 60 wt % of Al.sub.2 O.sub.3, from 10 to 40 wt % of SiO.sub.2, from 3 to 30 wt % of from B.sub.2 O.sub.3, from 1 to 15 wt % of MgO, from 0.2 to 10 wt % of Cr.sub.2 O.sub.3, from 0.1 to 3 wt % of Li.sub.2 O, and from 1 to 20 wt % of at least one member selected from the group consisting of CaO, SrO and BaO. The ceramic composition has a small coefficient of linear expansion and can avoid cracking when undergoing thermal shock.

REFERENCES:
patent: 4396720 (1983-08-01), Beall et al.
patent: 4519828 (1985-05-01), Beall et al.
patent: 4526873 (1985-07-01), Beall et al.

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