Optical properties of the MoO3-TiO2 particulate system and its use as a ceramic pigment
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Undergraduate course
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Taylor & Francis
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Article
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Acesso restrito
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Abstract
Mo-doped TiO2 powders were prepared using a dry mixture of TiO2 and MoO3 oxides with several compositions, followed by a calcination step at several temperatures. The resulting oxide system develops yellow and green tones. The XRD patterns showed only traces of MoO 3; however, EDS results, combined with TG/DTA data, confirmed the presence of molybdenum ions, suggesting that the changes in optical properties of the oxide system is due to the incorporation of Mo ions into the TiO 2 matrix, substituting Ti+4 with Mo+6 ions. The band gap decreased with increasing of MoO3 content; on the other hand, the band gap reached a maximum value at about 850°C to 910°C when plotted as a function of the calcination temperature. The glazes produced showed that the oxide system under study is a potential material for use as abinary ceramic pigment. Copyright © 2013 Taylor & Francis Group, LLC.
Description
Keywords
Ceramic pigment , color , optical properties , Thermal processing , TiO2 , Calcination temperature , Molybdenum ions , Oxide systems , Particulate systems , Potential materials , TiO , XRD patterns , Calcination , Color , Energy gap , Metal ions , Optical properties , Thermal processing (foods) , Titanium dioxide , Molybdenum oxide , cation , metal oxide , molybdenum , molybdenum oxide , pigment , titanium dioxide , unclassified drug , catalyst , ceramics , chemical composition , differential scanning calorimetry , melting point , optics , particle size , particulate matter , powder , priority journal , spectroscopy , temperature , X ray diffraction
Language
English
Citation
Particulate Science and Technology, v. 31, n. 5, p. 466-473, 2013.
