Author(s): MIAO Li-feng, BAO Zhen-hong, JIANG Wei-hui, LUO Qing-chun, National Engineering Research Center for Domestic and Building Ceramics, Jingdezhen Ceramic Institute
Pages: 918-921
Year: 2016 Issue:  3
Journal: Bulletin of the Chinese Ceramic Society
Keyword:  silver; oil-spot glaze; Fe2O3;
Abstract: The silver oil-spot glaze was prepared by using kaolin,calcite,talc,quartz,feldsqar,Fe₂O₃ and Co₃O₄ as materials. The influences of Fe₂O₃ content and Co₃O₄ content on the oil-spot glaze effect were studied. The results show that the color of oil-spot glaze turns to silver with the increase of Fe₂O₃.But too much Fe₂O₃ will cause uneven glaze. When the Fe₂O₃ content is 0. 0255 mol,the glaze effect is the best. The appropriate Co₃O₄ not only make the oil spot effect more obvious,but also make the silver effect more prominent. When the Co₃O₄ content is 2wt%,the glaze has the best oil-spot effect. The effects of the sintering temperature and glaze thickness on the oil-spot glaze were also studied. The optimal process conditions are as follows,sintering temperature is 1270 ℃,holding time is 30 min and the glaze thickness is 1. 2-1. 5 mm.