High density chronic oxide refractory block

Details High density chronic oxide refractory block High density chronic oxide refractory block

1986-08-01

1988-02-09

Dixon, Jr., William R.

Compositions: ceramic

Ceramic compositions

Refractory

501133, C04B 3512

Patent

active

047242248

ABSTRACT:
Large, dense chromic oxide refractory blocks containing from about 80% to about 98% chromic oxide are made by firing a green block comprising, in addition to the chromic oxide, titania and a colloidal silica having a surface area of at least about 90 m.sup.2 /g. Blocks having porosities as low as 0% are made in either an oxidizing or a reducing atmosphere. The blocks are crack-free and have a good resistance to corrosion by molten glass.

REFERENCES:
patent: 2498622 (1950-02-01), Mochel
patent: 3773531 (1973-11-01), Manigault
patent: 3971665 (1976-07-01), Suzuki et al.
patent: 4028122 (1977-06-01), Greenewald, Jr.
patent: 4028123 (1977-06-01), Greenewald, Jr.
patent: 4119472 (1978-10-01), Brashear, Jr. et al.
patent: 4233079 (1980-11-01), Rechter
patent: 4374897 (1983-02-01), Yamaguchi

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