Uniform inorganic micropheres and production thereof

Details Uniform inorganic micropheres and production thereof Uniform inorganic micropheres and production thereof

1992-07-15

1994-12-27

Bell, Mark L.

Chemistry of inorganic compounds

Silicon or compound thereof

Oxygen containing

423339, 501 12, 2523157, C01B 33141

Patent

active

053763475

ABSTRACT:
A method of producing uniform inorganic microspheres with a particle size of 0.01 to 500 .mu.m by injecting an aqueous solution containing a particle-forming material into an organic solvent. The method includes injecting the aqueous solution into the organic solvent through a macromolecular membrane having a hydrophobic surface and having pores substantially uniform in pore size and extending in the direction of thickness of the membrane, substantially straight through the membrane, so that a path length of each of the pores corresponds substantially to a thickness of the membrane, to form, in said organic solvent, a large number of emulsion particles substantially uniform in size and then producing uniform inorganic microspheres from said emulsion particles on a one emulsion particle-to-one microsphere basis. The pores in the membrane are formed by either a corpuscular or laser beam.

REFERENCES:
patent: 3397257 (1968-08-01), Brambilla et al.
patent: 4640807 (1987-02-01), Afghan et al.
patent: 4911903 (1990-03-01), Unger et al.
patent: 4927560 (1990-05-01), Osaka et al.
patent: 4994335 (1991-02-01), Kamei et al.
"Ultrastructure Processing of Ceramics, Glasses, and Composites", by E. Barringer et al, John Wiley & Sons, New York, 1984, no month, pp. xiii-xvi and 315-333.

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