Thermodynamic Properties of Bismuth Sesquiselenide and Sesquitelluride and Their Solid Solutions

V.Sidorko,
 
L.Goncharuk,
 
R. Antonchenko
 

I. M. Frantsevich Institute for Problems of Materials Science of the NAS of Ukraine, Krzhizhanovsky str., 3, Kyiv, 03142, Ukraine
Powder Metallurgy - Kiev: Frantsevich Institute for Problems of Materials Science NASU, 2008, #03/04
http://www.materials.kiev.ua/article/715

Abstract

The Gibbs free energies, enthalpies and entropies of formation of bismuth selenide Bi2Se3 between 308 and 408 K, bismuth telluride Bi2Te3 between 308 and 413 K, and their solid solutions between 670 and 840 К are measured using the e.m.f method. Positive deviations of the activities of the components of the solid solutions from the ideal behavior are found. The possibility of ordering effects in the solid solutions at lower temperatures is assumed.


ACTIVITY, BISMUTH SELENIDE, BISMUTH TELLURIDE, ENTHALPY, ENTROPY, GIBBS FREE ENERGY, SOLID SOLUTION