METHOD TO PRODUCE ITEMS FROM QUARTZ CERAMICS Russian patent published in 2012 - IPC C04B35/14 C04B35/622 

FIELD: construction.

SUBSTANCE: method to produce items from quartz ceramics includes wet grinding of quartz stock, preparation of slurry, moulding of items in gypsum moulds, drying and annealing of items. Raw materials are ground unburnt wastes of quartz ceramics cleaned from gypsum traces, and slurry preparation is carried out by means of wet grinding in a ball mill at the ratio of "material: grinding bodies: water" equal to 1:(0.5-0.7):(0.13-0.15), for 2-6 hours with subsequent hydration of quartz glass grain for 10-30 hours while mixing the slurry. Annealing is carried out at the temperature of 1150-1200°C for 2-4 hours.

EFFECT: reduction of sintering temperature to produce strong and heat resistant items, high homogeneity of a material in items, elimination of underfilling and flaking, reduced scrap by cracks in production of large thin-walled items at the stage of moulding and annealing.

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