Process for obtaining refractory metal oxides based on silica by

Details Process for obtaining refractory metal oxides based on silica by Process for obtaining refractory metal oxides based on silica by

1990-12-18

1992-07-14

Chaudhuri, Olik

Chemistry of inorganic compounds

Silicon or compound thereof

Oxygen containing

423333, 423338, 501 12, 501133, C01B 3328

Patent

active

051301105

ABSTRACT:
Process for obtaining by sol-gel route refractory metal oxides based on silica in which a monolithic gel is prepared, in an aqueous medium, at a temperature of less than 60.degree. C., by leaving at rest an aqueous sol obtained by simple mixing in stoichiometric quantities of an aqueous sol of silicic acid and of one or more aqueous solutions of a water-soluble salt of one or more other constitutive metals of these oxides, then the monolithic gel obtained is calcined at a temperature of less than 1000.degree. C. after it has been dried at a temperature of less than 150.degree. C.

REFERENCES:
patent: H626 (1989-04-01), Covino
patent: 3929439 (1975-12-01), Pierce
patent: 4631158 (1986-12-01), Rieck et al.
Chemical abstracts, vol. 110, No. 2, Jan. 9, 1989, p. 265, abrege No. 124432, Columbus, Ohio, USA.
JP A-63166714 (Kyoritsu Ceramic Materials Co., Ltd.) Sep. 7, 1988.

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