Method of preparing zinc orthotitanate pigment

Compositions: coating or plastic – Coating or plastic compositions – Carbohydrate or derivative containing

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106296, 106299, C09C 136, C09C 104

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active

040393470

ABSTRACT:
Zinc orthotitanate (Zn.sub.2 TiO.sub.4) suitable for use as a pigment for spacecraft thermal control coatings is prepared by heating a slightly zinc-deficient reaction mixture of precipitated oxalates of zinc and titanium. The reaction mixture can be formed by co-precipitation of zinc and titanium oxalates from chloride solution or by mixing separately precipitated oxalates. The mixture is first heated to 400.degree. to 600.degree. C to remove volatiles and is then rapidly heated at 900.degree. to 1200.degree. C. Zinc orthotitanate produced by this method exhibits the very fine particle size needed for thermal control coatings as well as stability in a space environment.

REFERENCES:
patent: 2140235 (1938-12-01), Lederle et al.
patent: 3337358 (1967-08-01), Vossen
patent: 3607338 (1971-09-01), Webb

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