GAUDON, Manuel; CARBONERA, Chiara; THIRY, Anne-Emmanuelle; DEMOURGUES, Alain; DENIARD, Philippe; PAYEN, Christophe; LÉTARD, Jean-François; JOBIC, Stéphane

doi:10.1021/ic701263c

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GAUDON, Manuel
Institut de Chimie de la Matière Condensée de Bordeaux [ICMCB]

CARBONERA, Chiara
Institut de Chimie de la Matière Condensée de Bordeaux [ICMCB]

THIRY, Anne-Emmanuelle
Institut des Matériaux Jean Rouxel [IMN]

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Inorganic Chemistry. 2007, vol. 46, n° 24, p. 10200-10207

American Chemical Society

Résumé en anglais

The members of the CuMo1 - xWxO4 series (0 x < 0.1) undergo a first-order phase transition at normal pressure, which can be induced by temperature. The two allotropic forms exhibit two distinguishable colors, green for the high-temperature form () and brownish-red for the low temperature one (), which opens up a new market for user-friendly temperature indicators. From X-ray diffraction and microprobe analyses as from optical properties, the tungsten substitution rate for molybdenum is limited to 12%. Beyond, a third, parasitic wolframite-type phase, CuMo0.6W0.4O6, systematically crystallizes besides the /CuMo0.9W0.1O4 compounds. Within the CuMo1 - xWxO4 solid-solution domain, the dependence of the transition temperatures was followed by calorimetry, optical reflectivity, and magnetism...< Réduire

Mots clés en anglais

Thermochromism

Phase Transition

Wolframite

Tungsten

Molybdenum

Optical properties

Temperature

Colors

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Adaptable thermochromism in the CuMo1-xWxO4 series (0 < x < 0.1): a behavior related to a first-order phase transition with a transition temperature depending on x

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