Program and the Book of Abstracts (PDF) - Mrs-serbia.org.rs

Tenth Young Researchers Conference – Materials Science and Engineering
December 21-23, 2011, Hall 2, SASA, Knez Mihailova 35 & 36, Belgrade, Serbia
VIII/1
Phase relations in the Nb 2 SbVO 10 −Sb 2 O 4 system in the solid state
Mateusz Piz, Elżbieta Filipek
West Pomeranian University of Technology, Szczecin; Faculty of Chemical Technology and
Engineering; Department of Inorganic and Analytical Chemistry; Szczecin, Poland
The aim of this work was determining the phase relation in the Nb 2 SbVO 10 -α-Sb 2 O 4 system
over the whole component concentration range. The samples for the studies were prepared in high
temperature reaction of V 2 O 5 and α-Sb 2 O 4 with T-Nb 2 O 5 . The titled system has been investigated
by using XRD, DTA, IR and SEM methods. XRD phase analysis of the samples after the last
heating stage has shown, among them, that in the solid state Nb 2 SbVO 10 and α-Sb 2 O 4 are not inert
to one another but interact to form a new compound. The diagram of the Nb 2 SbVO 10 -α-Sb 2 O 4
system up to solidus line has been constructed.
VIII/2
Optimization of technology of thermoelectric materials based on Bi 2 Te 3
Andrey Voronin, Vladimir Bublik, Natalia Tabachkova, Andrey Usenko
National University of Science and Technology "MISIS", Moscow, Russia
Nowadays, the most efficient thermoelectric materials in a temperature range 50-200 o C are solid
solutions of the bismuth and antimony chalcogenides. Failure of thermoelectric generator modules
due to irreversible changes in the contact layer has sometimes been detected at a temperature of 170
o C.
Here we analyze reasons of the destruction of n-type thermoelements responsible for the failure
of the modules. It was found that, at T ≥ 170 o C, surface diffusion of bismuth results in the formation
of BiSn eutectic with a low melting temperature, which penetrates the material at the damaged layer
formed during electroerosion cutting.
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