Particulate product of self supporting spheres containing inorga

Details Particulate product of self supporting spheres containing inorga Particulate product of self supporting spheres containing inorga

1976-07-06

1977-12-20

Spicer, Jr., Robert L.

Plastic article or earthenware shaping or treating: apparatus

Means encapsulating normally liquid material

425 8, 425 6, B29C 1300

Patent

active

040638561

ABSTRACT:
Spherical particulates containing inorganic material are produced by forming a slurry of particles in an aqueous solution of a gellable organic binder, introducing droplets of the slurry into a two-phase liquid containing an upper hydrophobic phase for forming and maintaining the droplets in spherical form, and a lower ionic phase containing divalent or trivalent metal cations for promoting gellation of the organic binder, thereby converting the slurry droplets into substantially self-supporting spheres of particles dispersed in the gelled binder. Upon separation from the two-phase liquid and one or more optional heat treatments to remove the binder, to convert precursors into the desired final inorganic form, or to strengthen or densify the spheres, such spheres are useful, for example, as starting materials for single crystal growth from a melt.

REFERENCES:
patent: 1393383 (1921-10-01), Linebarger
patent: 2531986 (1950-11-01), Pile et al.
patent: 2543132 (1951-02-01), Shabaker
patent: 2574357 (1951-11-01), Stammer et al.
patent: 2738548 (1956-03-01), Kassel
patent: 3001228 (1961-09-01), Nack
patent: 3023171 (1962-02-01), Smith

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