Work

Thermoelectric properties of Yb x Co 4 Sb 12 prepared under high pressure

Year: 2015

Type: article

Abstract: We report the thermoelectric properties of partially filled skutterudites Yb x Co 4 Sb 12 synthesized under high pressure. The phase compositions and actual Yb filling ratios were characterized by X-ray diffraction and electron probe microanalysis (EPMA), respectively. The EPMA results show that the maximum actual Yb doping content can be increased to 0.29, the highest for any Yb x Co 4 Sb 12 reported so far. The lattice thermal conductivity is reduced by increasing the Yb filling fraction. The minimum value is 2.02 W m −1 K −1 for Yb 0.6 Co 4 Sb 12 at 300 K. The electrical conductivity and the Seebeck coefficient for Yb-doped samples exhibit the typical behavior of n-type filled skutterudites. The maximum ZT value is 0.1 for Yb 0.2 Co 4 Sb 12 at room temperature.

Source: Japanese Journal of Applied Physics

DOI: 10.7567/jjap.54.055501

Authors: Yuqi Chen, Yukihiro Kawamura, Junichi Hayashi, Chihiro Sekine

Institution: Muroran Institute of Technology

Language: English

Topic: Advanced Thermoelectric Materials and Devices

Subfield: Materials Chemistry

Field: Materials Science

Domain: Physical Sciences

Open Access status: bronze

Funder: Japan Society for the Promotion of Science

Award: Synthesis of new rare earth pnictides using 6-6 type high-pressure apparatus