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- W2093072922 abstract "In this work, vitreous samples were prepared in the binary system (100 − x)NaPO3−xMO3 with M = Mo and W and x varying from 10 to 60. The transmittance properties in the UV, visible, and near-infrared were monitored as a function of MO3 concentration. In both cases, an increase in the amount of transition metal results in an intense and broad absorption band in the visible and near-infrared attributed to metal reduction under synthesis conditions. It was shown that this large absorption can be partially or totally removed using specific oxidizing agents or by improving synthesis parameters such as melting temperature or cooling rate of the melt. In addition, structural investigations by Raman and X-ray absorption spectroscopy suggest that reduction only occurs when the metal cation is in octahedral geometry and that the transmittance improvement is not related with any structural changes. These results were explained in terms of thermodynamic equilibrium of redox species in the melt and allowed to obtain for the first time transparent and chemically stable glasses containing high concentrations of MO3 with transition metals in octahedral geometry inside the glass network." @default.
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- W2093072922 date "2008-03-22" @default.
- W2093072922 modified "2023-10-14" @default.
- W2093072922 title "Redox Behavior of Molybdenum and Tungsten in Phosphate Glasses" @default.
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- W2093072922 doi "https://doi.org/10.1021/jp711709r" @default.
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