Pseudoternary system （Bi2Te3-Sb2Te3-Sb2Se3） ceramic smeiconductor cooling materials were pre-pared in solid state reaction with conventional techniques ofsintering ceramics.The effect of doping on the properties ofthe material was studied.X-ray diffraction analysis showedthat n-p-type materials were solid solutions based on Bi2Te3and Sb2Te3 respectively.SEM photographs proved that theboth types of materials were inhomogeneous and layer struc-ture.The values of fingure of merit for n-type and p-typematerials were 3.4×10-3 K-1,respectively.The fabricatedthermoelectric modlules made of the materials provided excel-lent cooling effect.
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