METHOD OF PRODUCING GLASS-CERAMIC MATERIAL OF CORDIERITE COMPOSITION

摘要

FIELD: technological processes.;SUBSTANCE: invention relates to production of glass-ceramic material for radio engineering purposes and can be used in ceramic and aviation industry. Method of producing glass-ceramic material of cordierite composition includes grinding amorphous glass of magnesium aluminosilicate composition by wet method to produce an aqueous slurry with density 2.00-2.02 g/cm³, pH=2-4, fineness with sieve residue 0.063 mm 7-9%, with content of particles up to 5 mcm - 30-38%, forming blanks in porous moulds and their heat treatment. First stage of heat treatment is carried out at 850°C with holding for 3 hours, and the second - at 1350-1360°C with holding for 2-3 hours. Speed of lifting and lowering temperature not more than 500°C/h.;EFFECT: higher density of sintered material up to 96% of theoretical value and lower power consumption during its production.;1 cl, 3 ex, 1 tbl