Work

High-Pressure Synthesis of Skutterudite-Type Thermoelectric Materials

Year: 2016

Type: article

Abstract: We have developed a manufacturing system by combination of high-pressure synthesis method using a multi-anvil press, and spark plasma sintering (SPS) method. By means of the system, we have succeeded in synthesizing new filled skutterudite-type thermoelectric materials MmxCo4Sb12 (Mm=mischmetal). The thermoelectric properties of partially filled skutterudite compounds MmxCo4Sb12 synthesized under high pressure have been investigated. The Seebeck coefficient of MmxCo4Sb12 shows negative value, which means n-type conductivity. The highest dimensionless figure of merit ZT value is 0.25 for Mm0.6Co4Sb12 at 700 K.

Source: Materials science forum

DOI: 10.4028/www.scientific.net/msf.879.1737

Authors: Chihiro Sekine, Hirotaka Kato, Yukihiro Kawamura, Chul Ho Lee

Institutions: Muroran Institute of Technology, National Institute of Advanced Industrial Science and Technology

Language: English

Topic: Advanced Thermoelectric Materials and Devices

Subfield: Materials Chemistry

Field: Materials Science

Domain: Physical Sciences

Open Access status: hybrid

Funders: High Energy Accelerator Research Organization, Japan Society for the Promotion of Science

Award: An approach from high pressure and high temperature method in order to clarify the mechanism of Kondo semiconductor with novel antiferromagnetic properties.