THERMAL CONDUCTIVITY OF THREE-DIMENSIONAL NANOSTRUCTURED BI<sub>85</sub>SB<sub>15</sub> SOLID SOLUTION

Tagiyev M. M., Abdinova G. D., Abdullaeva I. A.

RUSSIAN PHYSICS JOURNAL, vol.64, no.10, pp.1886-1892, 2022 (SCI-Expanded) identifier identifier

  • Publication Type: Article / Article
  • Volume: 64 Issue: 10
  • Publication Date: 2022
  • Doi Number: 10.1007/s11182-022-02537-0
  • Journal Name: RUSSIAN PHYSICS JOURNAL
  • Journal Indexes: Science Citation Index Expanded (SCI-EXPANDED), Scopus, Academic Search Premier, INSPEC, zbMATH
  • Page Numbers: pp.1886-1892
  • Azerbaijan State University of Economics (UNEC) Affiliated: No

Abstract

The paper studies the thermal energy transfer in the there-dimensional nanostructured Bi85Sb15 solid solution. For this study, the Bi85Sb15 specimens are obtained from the powder grains with the size not over 2.10(5), 950, 650, 380, 30 and 15 nm, and their thermal conductivity is investigated in the range of similar to 80-300 K. The Bi85Sb15 specimens are studied both before and after similar to 503 K vacuum annealing for 2 hours. The lattice and electronic thermal conductivities are determined herein. It is shown that at low temperatures, about 85% of the thermal conductivity is provided by the lattice vibrations, while at similar to 300 K, about 64% of it is provided by conduction electrons. At similar to 80 K, the electronic thermal conductivity grows, while the lattice thermal conductivity slightly drops due to the increase in the concentration of the charge carriers and more intensive phonon scattering at the grain boundaries. The obtained results are proven by measuring the electrical parameters of the Bi85Sb15 solid solution.