Synthesis and optical and structural characterization of [Ce.sub. pigments

The synthesis of pigments from the system [Ce.sub.1-x][O.sub.2]-[M.sub.x]O(M = Cu, Co) was achieved via a polymeric precursors method, Pechini method. Differential scanning calorimetry (DSC) and thermogravimetry (TG) techniques were used to accurately characterize the distinct thermal events occurri...

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Bibliographic Details
Published in:Journal of thermal analysis and calorimetry 2011-02, Vol.103 (2), p.501
Main Authors: Araujo, V.D, Bernardi, M.I.B
Format: Article
Language:English
Subjects:
Calorimetry
Chemical properties
Cobalt
Diffraction
Optical properties
Powders
X-rays
Online Access:Get full text
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Summary:The synthesis of pigments from the system [Ce.sub.1-x][O.sub.2]-[M.sub.x]O(M = Cu, Co) was achieved via a polymeric precursors method, Pechini method. Differential scanning calorimetry (DSC) and thermogravimetry (TG) techniques were used to accurately characterize the distinct thermal events occurring during synthesis. The TG and DSC results revealed a series of decomposition temperahires due to different exothermal events, which were identified as [H.sub.2]O elimination, organic compounds degradation, and phase formation. X-Ray diffraction patterns show the presence of pure cubic Ce[O.sub.2] phase for the samples with low Cu and Co loading. A decrease of the specific surface area with increasing copper and cobalt content was observed. The UV-visible diffuse reflectance technique was employed to study the optical properties in the 200-800 nm range. Colorimetric coordinates L*, a*, b* were calculated for the pigment powders. The powders presented a variety of colors from yellow for pure Ce[O.sub.2], to brown for the ones loaded with copper and gray for the ones with cobalt.
ISSN:1388-6150
1588-2926
DOI:10.1007/s10973-010-0892-8