Ceramic Composition with Scoria

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PURPOSE : Provided is an earth composition for ceramic ware, which requires a reduced firing temperature as compared to other earth compositions generally used in ceramic ware, is well turned into porcelain with no use of glaze, and shows various colors ranging from a brown color to a black color. CONSTITUTION : The earth composition for ceramic ware comprises 100 parts by weight of a scoria material and 10-80 parts by weight of clay. In the earth composition, the scoria material comprises : 50.85 wt%% of SiO2; 13.48 wt%% of Al2O3; 11.89 wt%% of Fe2O3; 5.35 wt%% of MgO; 2.97 wt%% of Na2O; 1.39 wt%% of K2O; 0.06 wt%% of P2O5; 2.14 wt%% of TiO2; and 0.14 wt%% of MnO, ignition loss being 9.22 wt%%. Additionally, the clay comprises : 63.41 wt%% of SiO2; 17.35 wt%% of Al2O3; 5.21 wt%% of Fe2O3; 0.98 wt%% of MgO; 0.45 wt%% of C1O; 0.99 wt%% of Na2O; 2.04 wt%% of K2O; 1.24 wt%% of TiO2; and 0.03 wt%% of MnO, ignition loss being 8.30 wt%%. © KIPO 2007