期刊
JOURNAL OF APPLIED PHYSICS
卷 113, 期 4, 页码 -出版社
AMER INST PHYSICS
DOI: 10.1063/1.4789389
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资金
- JSPS [22840021]
- MEXT [23760628]
- Thermal and Electric Energy Technology Foundation
- Japan-U.S. Cooperation on Clean Energy Technologies
- METI, Japan
- Grants-in-Aid for Scientific Research [22840021, 23760628] Funding Source: KAKEN
X-ray structural analysis and high-temperature thermoelectric properties measurements are performed on polycrystalline samples of artificial mineral Cu12-xNixSb4S13 tetrahedrite. Analysis of the atomic displacement parameter manifests low-energy vibration of Cu(2) out of CuS3 triangle plane. The vibration results in low lattice thermal conductivity of less than 0.5 W K-1 m(-1). By tuning of the Ni composition x and decrease of electronic thermal conductivity, dimensionless thermoelectric figure of merit for x = 1.5 achieves 0.7 at 665 K, which is a considerably high value among p-type Pb-free sulfides. Because the tetrahedrite is an environmentally friendly material, it constitutes a good thermoelectric material for use in support of a sustainable society. (C) 2013 American Institute of Physics. [http://dx.doi.org/10.1063/1.4789389]
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