Thermoelectric Properties of an Extruded ZrO2-Modified Bi0.85Sb0.15 Solid Solution
Inorganic Materials, vol.59, no.8, pp.805-812, 2023 (SCI-Expanded, Scopus)
- Publication Type: Article / Article
- Volume: 59 Issue: 8
- Publication Date: 2023
- Doi Number: 10.1134/s0020168523080162
- Journal Name: Inorganic Materials
- Journal Indexes: Science Citation Index Expanded (SCI-EXPANDED), Scopus, Academic Search Premier, Aerospace Database, Chemical Abstracts Core, Chimica, Communication Abstracts, Compendex, INSPEC, Metadex, Civil Engineering Abstracts
- Page Numbers: pp.805-812
- Keywords: extrusion, mobility, modifier, solid solution, thermoelectric material
- Open Archive Collection: Article
- Azerbaijan State University of Economics (UNEC) Affiliated: Yes
Abstract
Abstract—: The electrical conductivity (σ), thermoelectric power (α), Hall coefficient (RH), and thermal conductivity (κ) of unmodified and 0.5 wt % ZrO2-modified extruded samples of the Bi0.85Sb0.15 solid solution have been measured in the range ~77–300 K at a magnetic field strength of up to ~74 × 104 A/m. The results demonstrate that the addition of 0.5 wt % ZrO2 to Bi0.85Sb0.15 reduces the phonon component of its thermal conductivity, leading to an increase in its thermoelectric figure of merit (Z) to ~6.4 × 10–3 K–1. The use of the modified material is expected to considerably improve parameters of related low-temperature thermoelectric converters. At ~77 K, in both the unmodified and ZrO2-modified Bi0.85Sb0.15 solid solutions heat is transported largely by lattice vibrations.