YU Kangtai, DENG Jiyou, TANG Qiyun
（Wuhan University of Technology） （Chongqing SIWEI Ceramic Ltd）
Abstract: Based on the study on the mineralogical composition constitutionmicrostrure and glass phase constitution by XRDSEM and XPS,this article analysed the statevalence and the change of Fe,Cr and Co in the refiring process．Theresearch showed the reason for the colour variation of black stain in refiring process and provided the way of resolution of colour variation of black glaze．
Key words: black glazerefiring,X－ray photoelectron spectroscopy,colour variation