ZHU Congxu ^{1, 2}, XU Hui ¹, SONG Congjun ¹, FA Wenjun ¹, FENG Minghua ¹, ZHENG Zhi ^{1, 2}
(1. Key Laboratory for Micro-Nano Energy Storage and Conversion Materials of Henan Province, Institute of Surface Micro and
Nano Materials, Xuchang University, Xuchang 461000, Henan, China; 2. Collaborative Innovation Center of Nano Functional
Materials and Applications of Henan Province, Xuchang 461000, Henan, China)

Abstract: Transition metal element cobalt was added as a coloring agent to the glaze. Mainly by controlling the adding amount of colorant,optimal process parameters for brighter glaze, jade texture and delicate, smooth morphology and coloration uniformity of Jun ware after glost firing were obtained. The effects of additional cobalt element on surface coloration and microstructure of Jun ware were studied by X-ray diffraction (XRD), scanning electron microscopy (SEM), energy dispersive X-ray spectroscopy (EDX) and spectrophotometer. Experimental results show that with the addition of cobalt ions and cobalt oxides, moon white glazed Jun ware mainly exhibits blue color after firing; with the increase in the proportion of colorant added, the glaze color deepens, the glaze porosity decreases, and the crystallization is more obvious;the glaze layer is well-bonded with the body with a small amount of cobalt in the transitional region.

Key words: Jun porcelain; colorant; color; glaze-layer