Process for making hollow, ceramic spheroids
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United States of America Patent
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-
Sep 6, 1988
Issued Date -
N/A
app pub date -
Dec 12, 1986
filing date -
Oct 15, 1985
priority date (Note) -
Expired
status (Latency Note)
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Abstract
Process for making hollow, ceramic macrospheres by making a paste of a continuous phase material (e.g., sodium silicate or potassium silicate) and an insolubilizing agent (e.g., kaolin clay). Pellets are formed from the paste and expanded by subjection to heat to form hollow spheroids. The spheroids are fired at a temperature (typically 600.degree.-1000.degree. C.) and for a time sufficient to insolubilize the continuous phase material. The process may further include coating the fired spheroids with an epoxy resin (to reduce porosity) and/or bonding a plurality of the fired spheroids together to form a rigid mass of bonded spheroids.
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Cited Art Landscape
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