LATASTE, Emilie; DEMOURGUES, Alain; SALMI, J.; NAPOREA, C.; GAUDON, Manuel

doi:10.1016/j.dyepig.2011.05.016

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LATASTE, Emilie
Institut de Chimie de la Matière Condensée de Bordeaux [ICMCB]

DEMOURGUES, Alain
Institut de Chimie de la Matière Condensée de Bordeaux [ICMCB]

SALMI, J.
Marion Technologies

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Dyes and Pigments. 2011, vol. 91, n° 3, p. 396-403

Elsevier

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Irreversible thermochromism over a wide temperature range has been observed from the decomposition of a mixture of a barium carbonate and a metal oxide. The control of the reaction temperature can be predicted from the calculation of the Madelung energy of the barium/transition metal mixed oxide formed consecutively with the decarbonatation. Moreover, the Madelung energy of this formed mixed oxide may be predicted from bond valence considerations. This study offers a simple predictive approach to propose temperature indicators with significant optical contrast and a thermochromic temperature varying between 400 and 1200 °C.< Leer menos

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Inorganic pigments

Thermochromism

Metal oxides

Barium carbonates

Colour

Bond Valence

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Thermochromic behavior (400 < T °C < 1200 °C) of barium carbonate/binary metal oxide mixtures

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