Work

The Influence of Air and Subsequent Vacuum Thermal Treatment on the Thermoelectric Properties of Extruded TiO2 Ceramics

Year: 2013

Type: article

Abstract: The thermoelectric properties of air sintered and vacuum annealed TiO2 samples consolidated by the extrusion process have been studied. The samples were sintered in air at 1100, 1175, 1250 and 1350 °C and subsequently annealed under vacuum at 1075 °C. After both thermal treatments oxygen deficient phases were not observed and only a single rutile TiO2 phase was present in the samples. The density and grain size of the samples increased with an increase in air sintering temperature, while the total porosity decreased. Electrical conductivity of the samples increased with an increase in air sintering temperature. The highest Seebeck coefficient (~410 μV/K) and thermoelectric power factor (3,25 × 10-6 W/m-1K-2) at 280 °C were obtained for the sample that was sintered in air at 1175 °C before the following annealing under vacuum.

Source: Material Science and Applied Chemistry

DOI: 10.7250/msac.2013.006

Authors: Kristaps Rubenis, Valdis Teteris, Janis Locs, Janis Barloti, Liga Berzina-Cimdina

Institution: Riga Technical University

Language: English

Topic: Advanced Thermoelectric Materials and Devices

Subfield: Materials Chemistry

Field: Materials Science

Domain: Physical Sciences

SDG: Affordable and clean energy

Open Access status: bronze

Funders: European Regional Development Fund, State Education Development Agency Republic of Latvia