Hidden in plain heat: anomalous Lorenz number in the thermoelectric alloy Bi_0.4Sb_1.6Te₃.

ABSTRACT: Ternary and quaternary alloys based on Bi₂Te₃ remain to date the most efficient materials for thermoelectric cooling around room temperature. Among the various strategies developed over the last decades to further enhance their performance, nanostructuration induced by melt-spinning has proven to be effective, yielding higher values of the dimensionless thermoelectric figure of merit, attributed primarily to a significant decrease in the lattice thermal conductivity κL . Here, we present measurements of the total thermal conductivity κ of two polycrystalline samples of the alloy Bi_0.4Sb_1.6Te₃ prepared by conventional powder metallurgy and melt-spinning at low temperatures and under high magnetic fields of up to 14 T that challenge this

SUBMITTER: Candolfi C 

PROVIDER: S-EPMC12749814 | biostudies-literature | 2025 Nov

REPOSITORIES: biostudies-literature