FIELD: process engineering.
SUBSTANCE: invention relates to production of heat-insulation foamed materials. Glass powder is heated in helium medium at 0.2-0.5 MPa to 800°C. Molten glass mass is held in heating zone to saturation with helium. Then, gas pressure is decreased to 0.01-0.1 kPa to allows foaming of glass medium by dissolved gas. Rarefaction in gas is maintained to cool down said glass mass to vitrification stage.
EFFECT: low heat conductivity foamed glass with rarefied helium in its bubbles.
2 cl
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