Glass manufacturing – Processes – With pore forming in situ
Patent
1978-01-16
1979-12-11
Schor, Kenneth M.
Glass manufacturing
Processes
With pore forming in situ
106 40V, C03B 1908
Patent
active
041781635
ABSTRACT:
A method for the manufacture of foamed glass includes providing a mixture of a finely divided glass and a bonding agent. The bonding agent is selected from the group of aqueous solutions of the oxygen acids of beryllium, boron, aluminum, silicon, germanium, arsenic, antimony, tellurium, polonium, astatine and phosphorous, the aqueous solutions of the anhydrides of the oxygen acids, and the aqueous solutions of the salts formed by the oxygen acids and the basic oxides, and basic hydroxides of beryllium, boron, aluminum, silicon, germanium, arsenic, antimony, tellurium, polonium, astatine and of the transition metals having a variable oxidation number. The mixture is dried at a temperature from 20.degree. to 600.degree. C. to thereby transform the bonding agent into a gel having water bound thereto. The dried mixture is heated to a temperature from 800.degree. to 1,000.degree. C. to thereby melt the mixture and release the bound water from the gel. The released water forms a vaporous cellulating agent which effects the foaming of the molten glass.
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