XU Lihua ^1,2, LI Linlin ¹, ZHU Ge ¹

(1. Wuxi Institute of Arts & Technology, Yixing 214206, Jiangsu, China; 2. Research and Development Center of Ceramic Material and Process Engineering in Jiangsu Province, Yixing 214206, Jiangsu, China)

Abstract:  A medium temperature iron-red fancy glaze was successfully prepared by orthogonal tests using potassium feldspar, quartz, suzhou clay, talc, apatite, bone ash and iron oxide as raw materials. The influence of various compositions, technical parameters and firing system on the medium temperature iron-red fancy glaze was investigated. Scanning electron microscope (SEM) was used to investigate the morphology of the glaze. The results indicated: many submicron-sized α-Fe₂O₃ crystals were spread across the red areas of the glaze surface; many small drops were found on the dark brown areas of the surface with their diameters below 3 μm and β-Fe₂O₃crystals precipitated inside. Fine medium temperature iron-red fancy glaze could be obtained when fired at 1240 ℃ for 30 min.

Key words:  medium temperature iron-red fancy glaze; microstructure; firing system