GLAZE COMPOSITION FOR FORMING WATERDROP SHAPES ON PORCELAIN SURFACES AND METHOD FOR PRODUCING POCERLAIN BY USING GLAZE AND REDUCTIVE SINTERING

摘要

PURPOSE: Provided is a method for producing porcelain with waterdrop shapes on its surface by using a glaze forming waterdrop shapes and reductive sintering without carving, a conventional method for forming waterdrops. CONSTITUTION: The glaze comprises 15-30wt.% of ZnO, 10-20wt.% of BaCO3, 40-60wt.% of feldspar((Al,Si)4O8), 7-15wt.% of SiO2, and optionally 3-6wt.% of at least one compound selected from CaCO3, ZrO and TiO2. The porcelain forming waterdrop shapes is produced by the following steps of; mixing porcelain raw materials; forming shapes and drying; sintering formed porcelain at 800-900deg.C; applying the prepared glaze to a porcelain body; reductive sintering glazed-porcelain at 1250-1280deg.C, the melting point of the glaze, to make the glaze spread on the porcelain to change waterdrop shapes; cooling the porcelain with waterdrop shapes in a furnace; and optionally coating the produced porcelain with Ti or Au.