Preparation of Honeycomb-like Blue-black Foaming Art Glaze
Honeycomb-like blue-black foaming art glaze was prepared at 1310 ℃ for 30 min using sodium feldspar,potassium feldspar,calcined talc,Kaolin,quartz,limestone and barium carbonate as the main raw materials;using Fe2O3,Cr2O3,CoO and NiO as colorants,using SiOC as a forming agent and colorant.The effect of adding contents of SiOC,CoO and Fe2O3 on foaming effect and glaze color were studied,and phase composition and microstructure of the glaze were also characterized using X-ray diffraction(XRD)and scanning electron microscopy(SEM),respectively.The results show that a honeycomb-like blue-black foaming art glaze with good effect can be obtained when SiOC 0.45%~0.75%,CoO 6.5%~8.5%,Fe2O3 1.7%~2.7%,Cr2O3 2.2%and NiO 0.4%are added to the basic glaze formula.