| 摘要 |
PROBLEM TO BE SOLVED: To produce foamed glass which has closed cells and can maintain characteristics stable for a long period of time. SOLUTION: SiC as a foaming agent is added at 1% by weight and compounds of Zr, Cr and Ti as non-melting components are added, respectively at prescribed ratios, to soda-lime-base waste glass having an average grain size of 80μm and these materials are mixed for 16 hours by a dry process in a ball mill made of alumina earthenware. The resulted powder is put into an alumina crucible where the powder is heated up to 800 deg.C at a heating up rate of 100 deg.C/hour, is held for one hour and is slowly cooled. The foamed glass is thus obtained.
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