This invention is the latest achievement in the range of research themes for silicates. It takes aim at improving the heat-shocking resistence, enlarging the applicable range and prolonging the service life of silicate prods, which can be realized by appropriately controlling the microstructure of the semi-prods. and increasing the thermal conductivity thereof via introducting trace of rare-earth oxides to the composition. It offers the merits of simplicity in operation process, lower cost, conventional raw materials used, and is the excellent adopted process for mass prodn. of various prods. from porcelaneous-refractories for both common and special use. |