foam glass

foam glass
cellular glass made by fusing powdered glass with carbon particles or other gas-generating material, used chiefly for industrial purposes.
[1945-50]

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      lightweight, opaque glass material having a closed-cell structure. It is made in molds that are packed with crushed or granulated glass mixed with a chemical agent such as carbon or limestone. At the temperature at which the glass grains become soft enough to cohere, the agent gives off a gas that is entrapped in the glass and forms the closed-cell structure that remains after cooling. Foam glass is light enough to float in water and has been used as a substitute for cork, but its main uses are for thermal and sound insulation. It is impervious to moisture, most fumes, and vermin.

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Universalium. 2010.

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  • foam´less — foam «fohm», noun, verb. –n. 1. a mass of very small bubbles formed in water or other liquids especially by agitation, fermentation, effervescence, or boiling: »Another kind of extinguisher that is valuable for oil fires pours or throws a foam on …   Useful english dictionary

  • foam´ing|ly — foam «fohm», noun, verb. –n. 1. a mass of very small bubbles formed in water or other liquids especially by agitation, fermentation, effervescence, or boiling: »Another kind of extinguisher that is valuable for oil fires pours or throws a foam on …   Useful english dictionary

  • foam´er — foam «fohm», noun, verb. –n. 1. a mass of very small bubbles formed in water or other liquids especially by agitation, fermentation, effervescence, or boiling: »Another kind of extinguisher that is valuable for oil fires pours or throws a foam on …   Useful english dictionary

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