FOAMED MATERIAL AND METHOD FOR PRODUCTION THEREOF Russian patent published in 2006 - IPC C04B38/00 C04B28/26 C04B111/40 

FIELD: liquid glass-based foamed materials.

SUBSTANCE: claimed material is obtained from raw mixture containing (mass %): liquid glass 87-94; gel-forming agent such as potassium bichromate (K₂Cr₂O₇) 0.1-1.0; fine dispersed filler such as marble flour or hydroxyapatite 3-10; and water 1-2. Components are agitated in mixer for 2-5 min followed by granulation in aqueous solution of calcium chloride and aluminum chloride mixture taken in ratio of AlCl₃:CaCl₂:H₂O = (1-2):88:370 mass pts, wherein said solution has density of 1300 kg/m³. Obtained liquid glass bead is dried at 80-90°C up to finished moisture of 35-38 % and fed into metal mould in amount sufficient to produce articles of desired density. Heat treatment in mould is carried out at variable temperature regimes, namely mould is heated to 600-700°C for 1 min; material is conditioned at 600-700°C for 5-7 min; quenched at 450°C for 1 min; and conditioned at 450°C for 15-20 min. Then mould is cooled to 40-60°C, broken down and finished article is taken out.

EFFECT: accelerated method for production of foamed materials with increased buckling coefficient and homogenous porous and hard structure.

2 cl, 1 tbl