Chromogenic mechanisms of the celadon glaze for the Southern Song Official Kilns
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The glaze color of Southern Song Guan ware is soft and lustrous like jade. While extensive studies have focused on itshistorical and artistic value, the underlying mechanisms of its color formation have not been systematically explored. Thisstudy investigates the color characteristics and formation mechanisms of the Guan ware glaze by analyzing the types andoxidation states of iron ions, as well as the microstructural phase separation. The results show that, despite significantvariations in the RO and R2O components of the glaze, it falls within the typical categories of calcium and calcium-alkaliglazes. The color formation mechanism is primarily driven by the interaction between the Fe2+/Fe3+ ratio and structuralcoloration effects. The blue hues of Qing-tian (sky green) and Fen-lu (pinkish green) glazes arise from a higher Fe2+/Fe3+ratio and phase separation structures around 50 nm, which induce Rayleigh scattering. In contrast, the pale yellow colorof Mi-huang (beige yellow) glaze is formed by a lower Fe2+/Fe3+ ratio and phase separation structures around 180 nm. Additionally, the presence of crystals, bubbles, and phase separations enhances the emulsification effect, contributing to theunique jade-like texture of the glaze.
Abstract
The glaze color of Southern Song Guan ware is soft and lustrous like jade. While extensive studies have focused on itshistorical and artistic value, the underlying mechanisms of its color formation have not been systematically explored. Thisstudy investigates the color characteristics and formation mechanisms of the Guan ware glaze by analyzing the types andoxidation states of iron ions, as well as the microstructural phase separation. The results show that, despite significantvariations in the RO and R2O components of the glaze, it falls within the typical categories of calcium and calcium-alkaliglazes. The color formation mechanism is primarily driven by the interaction between the Fe2+/Fe3+ ratio and structuralcoloration effects. The blue hues of Qing-tian (sky green) and Fen-lu (pinkish green) glazes arise from a higher Fe2+/Fe3+ratio and phase separation structures around 50 nm, which induce Rayleigh scattering. In contrast, the pale yellow colorof Mi-huang (beige yellow) glaze is formed by a lower Fe2+/Fe3+ ratio and phase separation structures around 180 nm. Additionally, the presence of crystals, bubbles, and phase separations enhances the emulsification effect, contributing to theunique jade-like texture of the glaze.