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http://dx.doi.org/10.6111/JKCGCT.2015.25.4.153

Effect of Bi and Zr addition on yellow colour properties of environment-friendly ceria-based pigments  

Kim, Tae-Ho (Icheon Branch, Korea Institute of Ceramic Engineering & Technology (KICET))
Hwang, Hae-Jin (School of Material Science and Engineering, Inha University)
Kim, Jin-Ho (Icheon Branch, Korea Institute of Ceramic Engineering & Technology (KICET))
Hwang, Kwang-Taek (Icheon Branch, Korea Institute of Ceramic Engineering & Technology (KICET))
Han, Kyu-Sung (Icheon Branch, Korea Institute of Ceramic Engineering & Technology (KICET))
Abstract
Inorganic pigments have been received a great attention for various applications including paint, glazed ceramic ink, art tile, and building exterior due to their excellent thermal and chemical stability. Traditionally, the compositions of $PbCrO_4$, CdS and CdSe have been widely used as a yellow inorganic pigment. However, the use of these compositions has been restricted in recent years, because they contain harmful elements such as Cd, Cr, Pb and Se. In this study, new environment-friendly ceria-based pigment was synthesized using solid state reaction. Crystal structure and morphology of the obtained $Ce_{1-x}Zr_xBi_yO_{2-y/2}$ yellow pigment were analyzed using XRD and SEM, respectively. Substitutional effect of Zr and Bi on the pigment color was analyzed using UV-vis. spectrophotometer and CIE $L^*a^*b^*$ analysis. The crystal structure of the obtained pigments was dependent on the calcination temperature. The color characteristics and absorption band of the pigments were dependent on the calcination temperature and Zr, Bi contents. As a result, all the obtained yellow pigments showed the effective absorption ranged from ultraviolet to visible light, and $Ce_{0.44}Zr_{0.36}Bi_{0.20}O_{0.19}$ (x = 0.36, y = 0.20) pigment showed the most brilliant yellow color.
Keywords
Ceria based pigment; Inorganic pigment; Environment friendly; Yellow pigments; Solid state reaction; Raw material;
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