Correlation between the green-like coloration and the structural and electronic properties of celadon glazes (I)

摘要

Celadon glazes have been investigated by means of ordinary X-ray fluorescence analysis, and X-ray diffraction and X-ray absorption spectra using synchrotron radiation. The tentative glazes are prepared by mixing raw celadon materials of Masuda feldspar, limestone, quartz, and extra-added Fe_2O_3 of about lwt% at thermal treatment till about 1300 °C. It is found that the glaze-colors strongly depend on the Fe_2O_3 amount and the high-temperature treatment under oxidizing and deoxidizing in the used kiln. Especially, the characteristic color of blue-green, white-green-brown, and white-blue-green result from complex hybridized 3d~5L and 3d~6L bands. The 3d~6L hybridization is induced by an electronic exchange interaction between an empty 3d6 orbital of Fe ions and an occupied 2p orbital of surrounding O ions in the (SiO_2-Al_2O_3-CaO) basic complex ceramics of glass-state under the deoxidizing thermal treatment.