Synergistic effect of Jun porcelain glazes with cobalt and copper elements and coloring mechanism

Abstract

This study investigated the synergistic effect that the co-doping of cobalt and copper elements has on Jun porcelain glazes. The phase composition of the glazes was analyzed using X-ray diffraction (XRD). The sample morphology and phase separation structure of the glazes were examined using field emission scanning electron microscopy (FESEM). The element composition and valence state of the glazes were analyzed using X-ray photoelectron spectroscopy (XPS). The element distribution of the glazes was studied using an energy dispersive spectrometer (EDS). Our research shows that the distribution of the Co and Cu elements in the glaze layer is random, and indicates the presence of a liquid–liquid phase separation structure in the glazes. The coloring of the glazes is primarily related to the content of the cobalt and copper elements, the valence state of the coloring ions, and the micro-morphology. Additionally, there is an obvious synergistic effect between the coloring metal elements Co and Cu.