Method of making spinel compounds

Details Method of making spinel compounds Method of making spinel compounds

1994-10-28

1996-06-11

Bonner, Melissa

Compositions: ceramic

Ceramic compositions

Refractory

501127, 501153, C09B 35443

Patent

active

055255612

ABSTRACT:
The invention provides a method of making a magnesium/aluminium spinel compound having the formula Mg.sub.(1+x) Al.sub.(2+y) O.sub.4 in which 0.ltoreq.x.ltoreq.0.2 and 0.ltoreq.y.ltoreq.0.35. Particulate aluminium metal and a magnesium-containing component selected from magnesium oxide and precursors thereof are mixed together and heated to 800.degree.-1150.degree. C. in an oxidising environment to cause oxidation of at least part of the aluminium. Further heating then takes place to a temperature of 1150.degree.-1350.degree. C. in the oxidizing environment to cause aluminium oxide and magnesium oxide in the admixture to react together.

REFERENCES:
patent: 3457033 (1969-07-01), Gatti et al.
patent: 4222782 (1980-09-01), Alliegro et al.
patent: 4273587 (1981-06-01), Oda et al.
patent: 4542112 (1985-09-01), Matsui et al.
Dialog Abstract No. 84-228125/37,/JP 590135273A (Asahi Glass), Derwent Info Ltd. (1984) Aug. 3, 1984
Dialog Abstract No. 77-48346Y/27,/SU 0530015A (Vydrik), Derwent Info Ltd. (1986) Nov. 19, 1976.

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