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Synthesis and thermostructural studies of a CuFe1-xCrxO2 delafossite solid solution with 0<=X<=1

Lalanne, Maëva and Barnabé, Antoine and Mathieu, Florence and Tailhades, Philippe Synthesis and thermostructural studies of a CuFe1-xCrxO2 delafossite solid solution with 0<=X<=1. (2009) Inorganic Chemistry, vol. 48 (n° 13). pp. 6065-6071. ISSN 1531-8613

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Official URL: http://dx.doi.org/10.1021/ic900437x

Abstract

In this work, different CuFe1-xCrxO2 compositions with 0<=x<=1 were prepared by a standard solid-state reaction. These oxides crystallize with the delafossite structure. The phase stability and thermal behavior of the complete CuFe1-xCrxO2 solid solution was studied by thermogravimetric analysis and high-temperature X-ray diffraction experiments under an air atmosphere up to 1000 C. For x = 0, CuFeO2 is oxidized into the spinel (CuFe2O4) and copper monoxide (CuO) phases, whereas for x = 1, CuCrO2 is thermally stable. For all of the intermediate compositions (0 < x < 1), complex oxidation, reduction, and phase transitions between delafossite and spinel have been observed. chromium tends to stabilize the stoichiometric delafossite phase, while iron favors the delafossite-to-spinel phase transition.

Item Type:Article
Additional Information: Thanks to American Chemical Society editor. The definitive version is available at http://portal.acs.org/ The original PDF of the article can be found at Inorganic Chemistry website : http://pubs.acs.org/journal/inocaj
Audience (journal):International peer-reviewed journal
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Institution: Université de Toulouse > Institut National Polytechnique de Toulouse - INPT
Université de Toulouse > Université Paul Sabatier-Toulouse III - UPS
French research institutions > Centre National de la Recherche Scientifique - CNRS
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Deposited By: Nihad Lahdifi
Deposited On:23 Feb 2011 13:48

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