- Color Evolution and Phase Transformation of α-FeOOH@SiO2 and β-FeOOH@SiO2 pigments
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Ri Yu, Kyoon Choi, Jae-Hwan Pee, YooJin Kim
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J Korean Powder Metall Inst. 2013;20(3):210-214.
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DOI: https://doi.org/10.4150/KPMI.2013.20.3.210
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- This manuscript reports on compared color evolution about phase transformation of alpha-FeOOH@SiO_2 and beta-FeOOH@SiO_2 pigments. Prepared alpha-FeOOH and beta-FeOOH were coated with silica for enhancing thermal properties and coloration of both samples. To study phase and color of alpha-FeOOH and beta-FeOOH, we prepared nano sized iron oxide hydroxide pigments which were coated with SiO_2 using tetraethylorthosilicate and cetyltrimethyl-ammonium bromide as a surface modifier. The silica-coated both samples were calcined at high temperatures (300, 700 and 1000°C) and characterized by scanning electron microscopy, CIE L*a*b* color parameter measurements, transmission electron microscopy and UV-vis spectroscopy. The yellow alpha-FeOOH and beta-FeOOH was transformed to alpha-Fe_2O_3 with red, brown at 300, 700°C, respectively.
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Citations
Citations to this article as recorded by  - Coloration and Chemical Stability of SiO2and SnO2Coated Blue CoAl2O4Pigment
JiYeon Yun, Ri Yu, Jae-Hwan Pee, YooJin Kim
Journal of Korean Powder Metallurgy Institute.2014; 21(5): 377. CrossRef
- Abnormal Grain Growth During the Liquid-Phase Sintering
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Kyoon Choi, Doh-Yeon Kim
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J Korean Powder Metall Inst. 1998;5(3):171-177.
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