Fired spinel complex oxide and method for preparing the same

Details Fired spinel complex oxide and method for preparing the same Fired spinel complex oxide and method for preparing the same

2006-01-17

2006-01-17

Sample, David (Department: 1755)

Compositions: ceramic

Ceramic compositions

Refractory

C501S117000, C501S120000, C501S121000, C501S122000, C501S128000, C501S132000, C501S133000, C501S153000, C501S154000

Reexamination Certificate

active

06987077

ABSTRACT:
A fired spinel complex oxide is produced by firing a mixture containing a slag by-produced in chromium refining, a reducer, and a silica-containing material, and is essentially composed of: 29 to 40 percent by weight of Fe2O3; 15 to 20 percent by weight of Al2O3; 9 to 14 percent by weight of MgO; 0 to 4 percent by weight of Na2O; 9 to 17 percent by weight of Cr2O3; 14 to 20 percent by weight of SiO2; and 2 percent by weight or less of CaO. The fired spinel complex oxide shows a Cu—Kα X-ray diffraction pattern in which the ratio (b/a) of the diffraction peak intensity of the silica-containing material (b) in the vicinity of 2θ=26.7° to the {113} plane diffraction peak intensity (a) in the vicinity of 2θ=36° is 0.1 or less.

REFERENCES:
patent: 4751208 (1988-06-01), Aoki et al.
patent: 47023390 (1972-10-01), None
patent: 62036061 (1987-02-01), None
patent: 03205357 (1991-09-01), None

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