Process for forming highly uniform silica spheres

Details Process for forming highly uniform silica spheres Process for forming highly uniform silica spheres

1989-11-22

1991-01-08

Doll, John

Chemistry of inorganic compounds

Silicon or compound thereof

Oxygen containing

423335, 423339, 502 8, 502 10, C01B 3312, B01J 3508

Patent

active

049833693

ABSTRACT:
A process for producing highly uniform microspheres of silica having an average diameter of 0.1-10 .mu.m from the hydrolysis of a silica precursor, such as tetraalkoxysilanes, which is characterized by employing precursor solutions and feed rates which initially yield a two-phase reaction mixture.

REFERENCES:
patent: 3634558 (1972-01-01), Stober
patent: 4567030 (1986-01-01), Yuasa et al.
patent: 4775520 (1988-10-01), Unger et al.
Controlled Growth of Monodisperse Silica Spheres in the Micron Size Range, Stober et al., Journal of Colloid and Interface Science 26, 62-69, (1968).

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