METHOD OF PRODUCING GLASS-CERAMIC MATERIAL OF CORDIERITE COMPOSITION Russian patent published in 2016 - IPC C03C10/08 C04B35/195 

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.

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