Spinel type fused refractory product

Details Spinel type fused refractory product Spinel type fused refractory product

1981-03-06

1982-09-07

McCarthy, Helen M.

Compositions: ceramic

Ceramic compositions

Refractory

501120, C04B 3504, C04B 3542, C04B 3544

Patent

active

043484859

ABSTRACT:
A spinel type dense fused refractory product having excellent corrosion resistance comprises a crystalline structure consisting essentially of more than 50% by weight of composite spinel phase comprising RO component selected from MgO and FeO and R'.sub.2 O.sub.3 component selected from Cr.sub.2 O.sub.3, Al.sub.2 O.sub.3 and Fe.sub.2 O.sub.3 and periclase phase and a small content of glass matrix phase which consists essentially of the following constituents, analytically on a weight basis; a ratio of Cr.sub.2 O.sub.3 to Al.sub.2 O.sub.3 of 3.5 to 5.5; and 20% to 40% of MgO; 1.5% or less of CaO; 15% or less of Fe.sub.2 O.sub.3 (FeO is also calculated for Fe.sub.2 O.sub.3) and 5% or less of SiO.sub.2.

REFERENCES:
patent: 2599566 (1952-06-01), Magri
patent: 3198643 (1966-08-01), Alper et al.

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