Method for producing foamed ceramics

Details Method for producing foamed ceramics Method for producing foamed ceramics

1973-07-09

1976-03-09

Douglas, Winston A.

Compositions: coating or plastic

Coating or plastic compositions

Metal-depositing composition or substrate-sensitizing...

106 735, 106 736, C03C 322

Patent

active

039429903

ABSTRACT:
A method for the manufacture of foamed ceramics from a starting composition containing at least one component, which, when heated, forms a viscous, sintered and porous mass and a relatively difficultly oxidizable pore-forming agent for producing the porous structure, characterized by using as the starting composition a composition containing (1) at least one waste product rich in silica and containing readily oxidizable substances which, when heated, are themselves capable of producing uncontrollable pore formation and/or an undesirable melt, and (2) a strongly oxidizing agent, the quantity of oxidizing agent being such that the oxidizable substances are oxidized to eliminate or to reduce the uncontrollable pore formation and/or the melting and wherein the desired pore structure is obtained by oxidation of the difficultly oxidizable carbonaceous pore-forming agent.

REFERENCES:
patent: 1944007 (1934-01-01), Hobart
patent: 2123536 (1938-07-01), Long
patent: 2544752 (1951-03-01), Gelbman
patent: 2611712 (1952-08-01), Ford
patent: 2948948 (1960-08-01), Duplin et al.
patent: 2987411 (1961-06-01), Minnick
patent: 3325264 (1967-06-01), Marceau

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