METHOD OF PRODUCING WOLLASTONITE-BASED CERAMIC ARTICLES

摘要

FIELD: chemistry.;SUBSTANCE: method of producing wollastonite-based ceramic articles includes preparing an aqueous slurry from a mixture of natural wollastonite, clay and vermiculite, moulding articles, drying and firing. The mixture for the slurry contains the following components, wt %: wollastonite - 50-65; vermiculite - 15-20; clay - 5-10; alumina cement - 15-20. the slurry is prepared in a mixer by mixing for not more than 30 minutes while adding water in amount of 40-45% of the weight of dry components, and the articles are moulded with bumping-down in nonporous moulds.;EFFECT: low thermal conductivity density, high heat-resistance and chemical resistance to molten aluminium.;7 ex