%0 Journal Article
%T Structure and Thermoelectric Properties of  Nanostructured (Bi, Sb)<sub>2</sub>Te<sub>3</sub> (Review)
%A Igor A. Drabkin
%A Vladimir V. Karataev
%A Vladimir B. Osvenski
%A Aleksandr I. Sorokin
%A Gennady I. Pivovarov
%A Natalie Yu. Tabachkova
%J Advances in Materials Physics and Chemistry
%P 119-132
%@ 2162-5328
%D 2013
%I Scientific Research Publishing
%R 10.4236/ampc.2013.32018
%X <p class=\"MsoNormal\">
	<span style=\"font-family:Verdana;\">The investigation of the structure and thermoelectric properties of nanostructured
solid solutions (Bi, Sb)</span><sub><span style=\"font-family:Verdana;\">2</span></sub><span style=\"font-family:Verdana;\">Te</span><sub><span style=\"font-family:Verdana;\">3</span></sub><span style=\"font-family:Verdana;\"> p-type has been carried out.
The samples were obtained by grinding of original compositions in a planetary ball
mill and by spark plasma sintering (SPS). Initial powder has an average particle
size of 10 - 12 nm according to transmission electron
microscopy, and the size of the coherent scattering region (CSR) obtained by X-ray
line broadening. During sintering at </span><i><span style=\"font-family:Verdana;\">T</span><sub><span style=\"font-family:Verdana;\">s</span></sub></i><span style=\"font-family:Verdana;\"> = 250ˇăC - 400ˇăC, the grain size and CSR increased, which was associated with the
processes of recrystallization. The maximum of size distribution of CSR shifts to
larger sizes when </span><i><span style=\"font-family:Verdana;\">T</span><sub><span style=\"font-family:Verdana;\">s</span></sub></i><span style=\"font-family:Verdana;\"> increases
so that no broadening of X-ray lines at </span><i><span style=\"font-family:Verdana;\">T</span><sub><span style=\"font-family:Verdana;\">s</span></sub></i><span style=\"font-family:Verdana;\"> = 400ˇăC can take place. At higher </span><i><span style=\"font-family:Verdana;\">T</span><sub><span style=\"font-family:Verdana;\">s</span></sub></i><span style=\"font-family:Verdana;\">, the emergence of new nanograins is observed.
The formation of nanograins is conditioned
by reducing of quantity of the intrinsic point defects produced in the grinding
of the source materials. The study of the electrical conductivity and the Hall effect
in a single crystal allows to estimate the mean free path of the holes-</span><i><span style=\"font-family:Verdana;\">L</span></i><span style=\"font-family:Verdana;\"> in the single crystal Bi</span><sub><span style=\"font-family:Verdana;\">0.5</span></sub><span style=\"font-family:Verdana;\">Sb</span><sub><span style=\"font-family:Verdana;\">1.5</span></sub><span style=\"font-family:Verdana;\">Te</span><sub><span style=\"font-family:Verdana;\">3</span></sub><span style=\"font-family:Verdana;\"> which at room temperature is 2 - 5 nm (it is much smaller than the dimensions of
CSR in the samples). The method for evaluation of </span><i><span style=\"font-family:Verdana;\">L</span></i><span style=\"font-family:Verdana;\">
%K Solid Solutions (Bi
%K Sb)2Te3 P-Type
%K Nanostructure
%K Spark Plasma Sintering
%K Conductivity
%K Hall Effect
%K Hole Free Path
%K Seebeck Coefficient
%K Thermal Conductivity
%K Figure of Merit
%U http://www.scirp.org/journal/PaperInformation.aspx?PaperID=32650