Fired hollow ceramic spheroids

Details Fired hollow ceramic spheroids Fired hollow ceramic spheroids

1985-10-15

1987-04-14

Lesmes, George F.

Stock material or miscellaneous articles

Web or sheet containing structurally defined element or...

Composite having voids in a component

106288B, 4283166, 428331, 428402, 428404, 428406, B32B 326

Patent

active

046578102

ABSTRACT:
A hollow, ceramic macrosphere or spheroid comprising a relatively smooth outer skin and cellular shell is produced in the 2-20 mm diameter range with specific gravities in the 0.2-1.2 range. The spheroids can be rendered inert to water and are stable at temperatures of 800.degree. to 1000.degree. C., depending on their composition. The porosity of the shell can be controlled through various additives and/or epoxy resin coating. The spheroids may be made from common clay and sodium silicate.

REFERENCES:
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patent: 3273962 (1966-09-01), Walsh
patent: 3365315 (1968-01-01), Beck
patent: 3666506 (1972-05-01), Cowan et al.
patent: 3792136 (1974-02-01), Schmitt
patent: 3960583 (1976-06-01), Netting et al.
patent: 4039480 (1977-08-01), Watson et al.
patent: 4111713 (1978-09-01), Beck
patent: 4393901 (1983-07-01), Beck
patent: 4450184 (1984-05-01), Longo et al.

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