Foam glass is formed by heating to 750-950C a composition of (a) one or more amorphous mineral powder containing at least 50% SiO2 by weight; (b) gas-forming agents; (c) alkali-metal compounds. The (a) powder may be of perlite, silicon dust, slags, fly ash, etc. The (c) compound is preferably a silicate such as water-glass. A crystalline mineral powder such as magnesite or dolomite may be included in the composition to improve the mechanical and chemical resistance of the formed glass.
Origin
Unknown
Journal Title
B.P. 1299014, 6.12.72
Sector
Primary Papers
Class
PP 982