FIELD: construction.
SUBSTANCE: fibrous ceramic slurry is prepared. By means of vacuum moulding, a fibrous mat is produced with its further drying. Then the mat is submerged into a binding sol-gel for 1/4-3/4 of its height. Heat treatment of a gelled mat is carried out according to a stepwise mode including heating to (80-100)°C, soaking for 8-72 hours, heating to (250-350)°C with speed of (20-50)°C/hr, soaking for 2-4 hours, heating to (1000-1400)°C with speed of (100-200)°C/hr, soaking for 1-4 hours.
EFFECT: increased working temperature of a ceramic material having high elasticity, low density and heat conductivity.
3 cl, 1 tbl, 1 dwg
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