Novel Lead-free CeO<sub>2</sub>-ZrO<sub>2</sub>-Bi<sub>2</sub>O<sub>3</sub> Yellow Pigments for Arita Ware

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  • 有田焼用の新規な鉛フリーCeO<sub>2</sub>-ZrO<sub>2</sub>-Bi<sub>2</sub>O<sub>3</sub>黄色顔料
  • Novel Lead-free CeO₂-ZrO₂-Bi₂O₃ Yellow Pigments for Arita Ware

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Abstract

CeO2-ZrO2-Bi2O3 yellow pigments were prepared by a citrate complex method and their color properties were characterized to evaluate their suitability as environmentally friendly inorganic pigments. CeO2-ZrO2-Bi2O3 yellow pigments strongly absorb visible light at wavelengths below 500 nm and consequently they are brilliant yellow in color. The most vivid yellow was obtained for Ce0.43Zr0.37Bi0.20O1.90, which had a yellowness value (b*) in the CIE L*a*b* system comparable to that of the commercially available praseodymium yellow pigment (ZrSiO4:Pr). The Ce0.43Zr0.37Bi0.20O1.90 pigment was used in paints for porcelain. We found that the medium yellow pigment (chuuki), which is one of the traditional colors of Arita ware but which contains lead and antimony, could be faithfully replicated without using these toxic elements.

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