Foamed ceramic body and process for production thereof

Details Foamed ceramic body and process for production thereof Foamed ceramic body and process for production thereof

1986-03-21

1988-07-19

Capella, Steven

Compositions: ceramic

Ceramic compositions

Pore-forming

501 2, 501 39, 501 80, C04B 3802

Patent

active

047585382

ABSTRACT:
A foamed ceramic body comprising at least 90% by weight of a ceramic composed of 60 to 80% by weight of SiO.sub.2, 5 to 15% by weight of Al.sub.2 O.sub.3, 8 to 14% by weight of an alkali metal oxide, and 1 to 10% by weight of CaO; and a process for producing the said foamed ceramic body, which comprises mixing 100 parts by weight of a powdery mixture composed of 75 to 90% by weight of a volcanic material, 5 to 15% by weight of an alkali metal oxide or compound which forms an alkali metal oxide on heating and 2 to 10% by weight of CaO or a compound which forms CaO on heating, uniformly with 0.1 to 1 part by weight of a blowing agent, and heating the mixture to a temperature of 800.degree. to 1100.degree. C.

REFERENCES:
patent: 3887671 (1975-06-01), Metzger
patent: 4261938 (1981-04-01), Engstrom et al.
patent: 4430108 (1984-02-01), Hojaji et al.

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