石灰釉における酸化クロムの発色と釉組成の関係

概要

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Relationship between color of chromium green glaze fired at 1280℃ 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 0.25 mass% Cr_2O_3 into the base glazes with Segar formulars of 0.3 KNaO, 0.7 CaO, x Al_2O_3, y SiO_2 (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 occurence of several elemental changes in the absorption and scattering coefficients. The decrease in the scattering coefficient with increasing Al_2O_3 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.
社団法人日本セラミックス協会の論文
2000-05-01