Process for producing finely divided spherical glass powders

Details Process for producing finely divided spherical glass powders Process for producing finely divided spherical glass powders

1987-03-12

1987-12-29

Lindsay, Robert L.

Glass manufacturing

Processes

Self-supporting particle making

65 213, 65 603, 264 7, C03B 1910, C03C 2502

Patent

active

047158786

ABSTRACT:
A process is disclosed for producing finely divided spherical glass powders. The process comprises forming a coating of a surface active agent which can be of the nonionic or anionic type on the surfaces of the particles of a glass powder, feeding the coated particles and a carrier gas into a high temperature zone and maintaining the particles in the zone for a sufficient time to melt at least about 50% by weight of the particles and to form droplets therefrom, and cooling the droplets to form glass particles having essentially a spherical shape with the majority of the particles having an average particle size of less than about 25 micrometers in diameter which is essentially the same size as the starting glass particles.

REFERENCES:
patent: 3533756 (1970-10-01), Houseman
patent: 3597177 (1971-08-01), Davidoff
patent: 3682666 (1972-08-01), Lacourrege
patent: 4201560 (1980-05-01), Dewitte et al.
patent: 4643753 (1987-02-01), Braun
A Disintegrator to Make Grains for Glass-Microsphere Prodn., Bychkov et al, UDC 666.11-436, 1980, pp. 558-560, Plenum Pub. Co.

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