L. P. Bulat, V. B. Osvenskii, D. A. Pshenay-Severin, “Influence of grain size distribution on the lattice thermal conductivity of Bi$_2$Te$_3$–Sb$_2$Te$_3$-based nanostructured materials”, Fizika Tverdogo Tela, 2013, Volume 55, Issue 12,Pages 2323

This article is cited in 14 papers

Semiconductors

Influence of grain size distribution on the lattice thermal conductivity of Bi$_2$Te$_3$–Sb$_2$Te$_3$-based nanostructured materials

L. P. Bulat^a, V. B. Osvenskii^b, D. A. Pshenay-Severin^cd

^a St. Petersburg National Research University of Information Technologies, Mechanics and Optics
^b JSC "Giredmet" SRC RF, the Federal State Research and Design Institute of Rare Metal Industry, Moscow
^c Ioffe Institute, St. Petersburg
^d Peter the Great St. Petersburg Polytechnic University

Abstract: The change of the lattice thermal conductivity of bulk nanostructured materials based on Bi$_2$Te$_3$–Sb$_2$Te$_3$ solid solutions with grain size distribution has been studied. These materials have a polycrystalline structure with grain sizes ranging from a few tens of a nanometer to a few micrometers. Large grains may contain inclusions or consist of several smaller parts which can be identified with coherent scattering regions seen in X-ray diffraction. The change of the lattice thermal conductivity mediated by additional scattering by inclusions and grain boundaries has been calculated. This calculation allows for the effect of nanoparticle size distribution. The calculated estimates are compared with the available experimental data.

Received: 13.05.2013