Abstract
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.
Original language | English |
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Article number | 043712 |
Journal | Journal of Applied Physics |
Volume | 113 |
Issue number | 4 |
DOIs | |
Publication status | Published - 2013 Jan 28 |
Externally published | Yes |
ASJC Scopus subject areas
- Physics and Astronomy(all)