Akademik Məlumat İdarəetmə Sistemi
International Journal on Technical and Physical Problems of Engineering, vol.13, no.3, pp.110-114, 2021 (Scopus)
Extruded materials based on Bi85Sb15 compositions with ~630 μm grain sizes, doped with acceptor (Pb) and donor (Te) atoms were obtained, their thermo-and magnetothermoelectric properties in the range of ~77-300 K and at magnetic field intensity (H) up to ~74×104 A/m were studied. It was shown that by doping extruded samples of the Bi85Sb15+0.01 at.% Pb solid solution using Te atoms as donor impurities, the acceptor atoms of lead are initially compensated, and then with increasing content of tellurium atoms, Seebeck coefficient increases and approaches to Seebeck coefficient for non-doped solid sample Bi85Sb15 solution. The magnetic field influence on the parameters σ, α, Rh, χ for all studied annealed Bi85Sb15 samples is much stronger than in the same samples that did not pass annealing. For samples with a tellurium concentration of more than 0.005 at.%, at ~77 K the Seebeck coefficient for samples that have not been annealed and annealed is almost independent of the magnetic field strength. The magnetic field mainly effects on electronic component of the thermal conductivity of the studied samples reducing its value.