SOMBER SILVER GLAZE FOR POTTERY, POTTERY GOODS MADE BY USING THE GLAZE AND PRODUCTION THEREOF

摘要

PURPOSE:To prepare the object practical somber silver glaze for a pottery capable of readily process control and having resistance to occurrence of defect in regard to quality by adopting a specified composition represented using Segel formula. CONSTITUTION:The subject somber silver glaze for a pottery has a composition shown by formula I or II in case Segel formula is used for representation. In the above-mentioned formulae I and II, PbOh0.3, R21O shows Li2O, K2O and/or Na2O and R2O shows CaO, BaO, SrO, MgO and/or ZnO. MOx shows the total of oxides of Zr, Ti, V and Sn and arbitrarily the oxide of Sb. The above- mentioned glaze is applied to a basis material of a pottery goods and oxidative burning is carried out at 980-1,200 deg.C, thus producing the objective somber silver pottery goods.