Abstract
Relationship between color of chromium green glaze fired at 1280°C under oxidation atmosphere and its chemical composition was successfully analyzed by a newly developed method measuring absorption and scattering coefficients. Sixteen glazes were prepared by adding 0.25mass% Cr2O3 into the base glazes with Segar formulars of 0.3KNaO, 0.7CaO, xAl2O3, ySiO2 (x=0.35, 0.40, 0.45, 0.50; y=3.5, 4.0, 4.5, 5.0). Complicated changes in the apparent color of the glaze were observed because of the occurrence of several elemental changes in the absorption and scattering coefficients. The decrease in the scattering coefficient with increasing Al2O3 amount could be related to the amount of a Wollastonite crystalline phase, which had a significant influence on the apparent color of the glaze. Relationship between absorption coefficient and glaze composition could be clearly detected, which indicated a change in chemical state of Cr.
