Free Access
J. Chim. Phys.
Volume 95, Number 7, July/August 1998
Page(s) 1757 - 1764
DOI: 10.1051/jcp:1998339

J. Chim. Phys. Vol. 95, N°7  p. 1757-1764

In and InSe doping influence on CdTe postmelting effect

L. Shcherbak, P. Feychuk, O. Kopach, O. Falenchuk and O. Panchuk

Institute of Inorganic Chemistry, University of Chernivtsi, 2 Kotsiubinskoho, 274012 Chernivtsi, Ukraine

The influence of small In or InSe (up to 10 mol. %) additions to the CdTe melt on additional endothermic effects (AEE) positions in DTA thermograms was studied. It was observed, that both AEEs at 1392 K, typical for pure CdTe melt, and "own" at T m+(9-10) K appear in CdTe+In melt heating curves during thermocycling. The melting of CdTe-InSe alloys occurs step-by-step without "own" postmelting effects. The solid CdTe dissociation enthalpy near T m ( $\Delta H_{diss}=287\pm 22$ kJ/mol) and the CdTe fusion enthalpy ( $\Delta H_f=43.85\pm 1.15$ kJ/mol) were estimated on the base of the obtained DTA data.

L'influence de petites additions d'In ou d'InSe (jusqu'à 10 mol%) à du CdTe fondu sur les positions des effets endothermiques additionels (AEE) des thermogrammes d'analyse thermique différentielle (ATD) ont été étudiés. Nous avons observé, à la fois, que l'effet AEE à $1392\pm 1 $ K, typique du CdTe pure fondu et qu'un "novel" effet à la temperature de liquidus d'alliage CdTe+In $\pm$(9-10) K sont reproduits dans les courbes de chauffage. La fusion des alliages CdTe-InSe s'effectue pas à pas sans effets de post-fusion particuliers. L'enthalpie de dissociation de CdTe solide près de T m ( $\Delta H_{diss}=287\pm 22$ kJ/mol) et l'enthalpie de fusion de CdTe ( $\Delta H_f=43,85\pm 1,15$ kJ/mol) ont été estimées à partir des donnes obtenues par ATD.

Key words: CdTe -- In -- InSe,Ge -- DTA -- postmelting -- melting enthalphy

© EDP Sciences 1998

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