Optical properties of the MoO3-TiO2 particulate system and its use as a ceramic pigment

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2013-09-03

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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.

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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

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Particulate Science and Technology, v. 31, n. 5, p. 466-473, 2013.