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Research Article | Open Access

Novel environmentally friendly inorganic red pigments based on calcium bismuth oxides

WENDUSU, Tetsuro YOSHIDA, Toshiyuki MASUI, Nobuhito IMANAKA( )
Department of Applied Chemistry, Faculty of Engineering, Osaka University, 2-1 Yamadaoka, Suita, Osaka 565-0871, Japan
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Abstract

Novel environmentally friendly inorganic red pigments based on calcium bismuth oxide, Ca3(Bi1−xREx)8O15 (0 ≤ x ≤ 0.09; RE = Sc3+, Er3+, Y3+, Ho3+ and Dy3+), were successfully synthesized and the color properties were characterized. The color of these pigments depended on the composition and the synthesis condition, and the most vivid red color was obtained for the Ca3(Bi0.93Y0.07)8O15 sample calcined thrice at 800 ℃ for 2 h. The L* and a* values corresponding to brightness and red chromaticity for this pigment were 45.6 and +30.6, respectively, which were greater than those of a commercially available Fe2O3 pigment (L* = 38.4, a* = +29.5). Since the present pigment is composed of nontoxic and safe elements, it should be an attractive alternative to the conventional Fe2O3 pigment.

Keywords

environmentally friendlysolid solutioncalcium bismuth oxidered pigmentcation complexation method

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Journal of Advanced Ceramics
Volume 4 Issue 1,
March 2015
Pages 39-45
DOI: 10.1007/s40145-015-0129-1
Cite this article:
WENDUSU, YOSHIDA T, MASUI T, et al. Novel environmentally friendly inorganic red pigments based on calcium bismuth oxides. Journal of Advanced Ceramics, 2015, 4(1): 39-45. https://doi.org/10.1007/s40145-015-0129-1

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Received: 24 July 2014
Revised: 18 September 2014
Accepted: 22 September 2014
Published: 31 January 2015
© The author(s) 2015

Open Access: This article is distributed under the terms of the Creative Commons Attribution License which permits any use, distribution, and reproduction in any medium, provided the original author(s) and the source are credited.
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