Thermochromic behavior (400 < T °C < 1200 °C) of barium carbonate/binary metal oxide mixtures
Language
en
Article de revue
This item was published in
Dyes and Pigments. 2011, vol. 91, n° 3, p. 396-403
Elsevier
English Abstract
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 ...Read more >
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.Read less <
English Keywords
Inorganic pigments
Thermochromism
Metal oxides
Barium carbonates
Colour
Bond Valence
Origin
Hal imported