Abstract
We report on the effects of partial substitution of nickel by palladium on the thermoelectric properties of ZrNiSn-based half-Heusler compounds. It is shown that the substitution of palladium for nickel results in a significant, beneficial reduction of the thermal conductivity. The Seebeck coefficient also decreases, but only by a small amount. In the Hf0.5Zr0.5Ni0.8Pd0.2Sn 0.99Sb0.01 compound, a power factor of 22.1 μW K-2 cm-1 and a thermal conductivity as low as 4.5 W/m K are measured at room temperature. The dimensionless figure of merit ZT increases with increasing temperature and reaches a maximum value of 0.7 at about 800 K.
Original language | English |
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Pages (from-to) | 4165-4167 |
Number of pages | 3 |
Journal | Applied Physics Letters |
Volume | 79 |
Issue number | 25 |
DOIs | |
Publication status | Published - 2001 Dec 17 |
Externally published | Yes |
ASJC Scopus subject areas
- Physics and Astronomy (miscellaneous)