Preparation of gallium oxide

Details Preparation of gallium oxide Preparation of gallium oxide

1981-06-16

1982-09-28

Carter, Herbert T.

Chemistry of inorganic compounds

Oxygen or compound thereof

Metal containing

C01G 1500

Patent

active

043518214

ABSTRACT:
Gallium oxide, Ga.sub.2 O.sub.3, well adapted for the manufacture therefrom of garnets, luminophors, and the like, is prepared by (i) admixing, under stirring, a solution of a gallium salt with a base to convert said salt into gallium hydroxide, Ga(OH.sub.3 ; (ii) aging said gallium hydroxide reaction medium at elevated temperatures to effect precipitation therefrom of a gallium oxide/hydroxide fraction, GaO(OH); (iii) next filtering said gallium oxide/hydroxide fraction from said precipitation medium; (iv) drying and (v) calcining said filtered precipitate to convert same into said gallium oxide, Ga.sub.2 O.sub.3, with said oxide/hydroxide fraction (vi) being washed either before or after said filtration step (iii).

REFERENCES:
patent: 4081523 (1978-03-01), Pfundt et al.
Bohm et al., "Zeit fur Anorganishe und Allgemeine Chemie," Band 238, 1938, pp. 350-352.
Laubengayer et al., "Journal of American Chemical Soc.," vol. 61, 1939, pp. 1210-1214.
Milligan et al., "Journal of American Chemical Soc.", vol. 59, 1937, pp. 1670-1674.

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