| 摘要 |
PROBLEM TO BE SOLVED: To provide an inorganic foamed board which is extreamly low in cost, is excellent in fire resistance, imcombustibility, light-weight performance, thermal insulation property and sound insulation property and can be disposed. SOLUTION: The inorganic foamed board of 0.1-0.8 g/cm<SP>3</SP>density is formed by dissolving silicon oxide with alkali to once prepare a sodium silicate aqueous solution, adding an additive comprising boric acid or phosphoric acid to make a viscoelastic sodium silicate aqueous solution to be used as a raw material base material, mixing a solidifying agent comprising an alkali metal or an alkaline earth metal with the raw material base material to charge into a prescribed forming mold and heating at≥100°C to produce continuous pores by the evaporation and the release of water portion. COPYRIGHT: (C)2006,JPO&NCIPI
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