Title of article
Experimental determination of the eutectic temperature in air of the CuO–TiO2 pseudobinary system
Author/Authors
de la Rubia، نويسنده , , M.A. and Reinosa، نويسنده , , J.J. and Leret، نويسنده , , P. and Romero، نويسنده , , J.J. and de Frutos، نويسنده , , J. and Fernلndez، نويسنده , , J.F.، نويسنده ,
Issue Information
روزنامه با شماره پیاپی سال 2012
Pages
6
From page
71
To page
76
Abstract
Eutectic temperature and composition in the CuO–TiO2 pseudobinary system have been experimentally determined in air by means differential thermal analysis (DTA), thermogravimetry (TG) and hot-stage microscopy (HSM). Samples of the new eutectic composition treated at different temperatures have been characterized by X-ray diffraction (XRD) and X-ray absorption near-edge structural spectroscopy (XANES) to identify phases and to determine the Cu valence state, respectively. The results show that the eutectic temperature in air is higher by 100 °C (∼1000 °C) for a Ti-richer composition ( X TiO 2 = 25 mol % ) than the one calculated in the literature. The reduction of Cu2+ to Cu+ takes places at about 1030 °C. The existence of Cu2TiO3 and Cu3TiO4 has been confirmed by XRD in the temperature range between 1045 and 1200 °C.
Keywords
Firing , transition metal oxides , Eutectic , TIO2 , Powder-solid state reaction
Journal title
Journal of the European Ceramic Society
Serial Year
2012
Journal title
Journal of the European Ceramic Society
Record number
1413361
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