CERAMIC MIXTURE Russian patent published in 2013 - IPC C04B33/138 

FIELD: chemistry.

SUBSTANCE: invention relates to compositions of ceramic mixtures (stoneware) which can be used in making articles for decorative, art and general purposes. The ceramic mixture contains the following, wt %: plastic clay 62.0-66.0; kaolin 10.0-14.0; ground expanded pearlite 10.0-14.0; bone ash 10.0-14.0. Expanded pearlite is fed into a ball mill, water is poured and the components are ground for 6-8 hours. Plastic clay and bone ash are then fed into the mill and grinding is carried out for another 2-3 hours. The dried mass is flattened in vacuum presses and article are formed therefrom in a plastic manner; said articles are dried to moisture content of 1-7%; a painting is made on the surface of said articles using coloured engobe, dried, a layer of coloureless glaze is sprayed on and firing is carried out at temperature of 1150-1180°C.

EFFECT: low firing temperature.

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