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Journal of Advanced Ceramics 2015, 4(1): 39-45 https://doi.org/10.1007/s40145-015-0129-1
Research Article | Open Access | Issue | Published: 31 January 2015

Novel environmentally friendly inorganic red pigments based on calcium bismuth oxides

Show Author's Information WENDUSU,  Tetsuro YOSHIDA,  Toshiyuki MASUI,  Nobuhito IMANAKA( )
Department of Applied Chemistry, Faculty of Engineering, Osaka University, 2-1 Yamadaoka, Suita, Osaka 565-0871, Japan
Keywords:
calcium bismuth oxide, environmentally friendly, red pigment, solid solution, cation complexation method
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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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Abstract Full text About this article

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.


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About this article

Novel environmentally friendly inorganic red pigments based on calcium bismuth oxides

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

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: calcium bismuth oxide, environmentally friendly, red pigment, solid solution, cation complexation method

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Publication history
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Publication history

Received: 24 July 2014
Revised: 18 September 2014
Accepted: 22 September 2014
Published: 31 January 2015
Issue date: March 2015

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© The author(s) 2015

Acknowledgements

This work was supported by the Development of Alternative Technology for Hazardous Chemical Substances and Development of Novel Environment-and Human-friendly Inorganic Pigments for Three Primary Colors (FY2010-2014) programs of the New Energy and Industrial Technology Development Organization (NEDO) and the Ministry of Economy, Trade and Industry, Japan (METI).

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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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