Preparation and color performance control of Cr2O3 green pigment through thermal decomposition of chromium hydroxide precursor

Cr2O3 green pigment was prepared through the thermal decomposition of chromium hydroxide precursor, which was precipitated by Cr(NO3)3 and NaOH solutions. The color performance of as-prepared Cr2O3 is comparable to the commercial pigment when the precursor was precipitated from 0.25mol/L Cr(NO3)3 so...

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Bibliographic Details
Published in:Materials letters 2014-02, Vol.117, p.244-247
Main Authors: Zhang, H.L., Liang, S.T., Luo, M.T., Ma, M.G., Fan, P.P., Xu, H.B., Li, P., Zhang, Y.
Format: Article
Language:English
Subjects:
Chromium
Chromium hydroxide
Chromium oxides
Color
Color performance
Cr2O3 green pigment
Hydroxides
Microstructure
Morphology
Particles
Pigments
Precursors
Thermal decomposition
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Summary:Cr2O3 green pigment was prepared through the thermal decomposition of chromium hydroxide precursor, which was precipitated by Cr(NO3)3 and NaOH solutions. The color performance of as-prepared Cr2O3 is comparable to the commercial pigment when the precursor was precipitated from 0.25mol/L Cr(NO3)3 solution. When increasing the concentration of Cr(NO3)3 solution, the color of Cr2O3 becomes more reddish and much darker. The structure and morphology of different precursors and Cr2O3 samples were characterized. Amorphous precursor with non-agglomerated particles, which could be obtained by controlling the concentration of Cr(NO3)3 solution, was found to be a prerequisite for preparing Cr2O3 pigment with good color performance. •Cr2O3 green pigment was prepared through thermal decomposition of chromium hydroxide precursor.•The concentration of Cr(NO3)3 solution was modulated and Cr2O3 pigment with color performance comparable to the commercial sample was obtained.•Precursor with non-agglomerated particles was found to be a prerequisite for preparing Cr2O3 green pigment with good color performance.
ISSN:0167-577X
1873-4979
DOI:10.1016/j.matlet.2013.12.010