Method of manufacturing a silica powder

Details Method of manufacturing a silica powder Method of manufacturing a silica powder

1998-07-16

2000-06-06

Nguyen, Ngoc-Yen

Chemistry of inorganic compounds

Silicon or compound thereof

Oxygen containing

423335, 65395, C01B 33157, C01B 3312

Patent

active

060714875

ABSTRACT:
In the method, a suspension of silica particles in water is provided, the suspension is gelled, the resulting gel is dried under microwaves, the dried gel is fractioned into silica granules having a diameter lying in the range 10 .mu.m to 1000 .mu.m, having an apparent density of about 0.5 g/cm.sup.3 to 0.6 g/cm.sup.3, and a porosity of less than 20%, and the granules are screened in the range 100 .mu.m to 500 .mu.m. The suspension in water of silica particles is made by mixing silica soots having a size of less than 0.1 .mu.m and silica grains having a size greater than 1 .mu.m. Its maximum concentration in total weight is greater than that of a suspension of synthetic soots on their own, thereby making it possible to increase the production capacity of the method. Advantageously, the out-of-range granules rejected by the screening are recycled as silica grains for the aqueous suspension, thereby making it possible to increase the accumulated production efficiency of the method.

REFERENCES:
patent: 3954431 (1976-05-01), Fleming, Jr. et al.
patent: 4042361 (1977-08-01), Bihuniak et al.
patent: 4200445 (1980-04-01), Bihuniak
patent: 4767429 (1988-08-01), Fleming et al.
patent: 4810415 (1989-03-01), Winkelbauer et al.
patent: 5063179 (1991-11-01), Menashi et al.
patent: 5888587 (1999-03-01), Campion
Clasen, "Preparation of High-Purity Silica Glass Tubes by Centrifugal Casting of Colloidal Gels", J. of Materials Science Letters 7(1988) pp. 477-478 (No Month).
Clasen, "Preparation and Sintering of High-Density Green Bodies to High Purity Silica Glasses", J. of Non. Crystalline Solids 89(1987) 335-344 (No Month).

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