Abstract
The thermoelectric behavior of the transition-metal disulfides n-type NiCr2S4 and p-type CuCrS2 has been investigated. Materials prepared by high-temperature reaction were consolidated using cold-pressing and sintering, hot-pressing in graphite dies or spark-plasma sintering in tungsten carbide dies. The consolidation conditions have a marked influence on the electrical transport properties. In addition to the effect on sample density, altering the consolidation conditions results in changes to the sample composition, including the formation of impurity phases. Maximum room-temperature power factors were 0.18 mW m(-1) K-2 and 0.09 mW m(-1) K-2 for NiCr2S4 and CuCrS2, respectively. Thermal conductivities of ca. 1.4 W m(-1) K-1 and 1.2 W m(-1) K-1 lead to figures of merit of 0.024 and 0.023 for NiCr2S4 and CuCrS2, respectively.
| Original language | English |
|---|---|
| Pages (from-to) | 2029-2034 |
| Number of pages | 6 |
| Journal | Journal of Electronic Materials |
| Volume | 43 |
| Issue number | 6 |
| DOIs | |
| Publication status | Published - Jun 2014 |
Keywords
- Thermoelectric properties
- transition-metal sulfides
- hot-pressing
- spark plasma sintering
- consolidation methods
- ANTIFERROMAGNET CUCRS2
- PHASE-TRANSFORMATIONS
- NEUTRON-DIFFRACTION
- NICR2S4
- DISORDER
Cite this
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Ordered-defect sulfides as thermoelectric materials. / Kaltzoglou, Andreas; Vaqueiro, Paz; Barbier, Tristan; Guilmeau, Emmanuel; Powell, Anthony V.
In: Journal of Electronic Materials, Vol. 43, No. 6, 06.2014, p. 2029-2034.Research output: Contribution to journal › Article
TY - JOUR
T1 - Ordered-defect sulfides as thermoelectric materials
AU - Kaltzoglou, Andreas
AU - Vaqueiro, Paz
AU - Barbier, Tristan
AU - Guilmeau, Emmanuel
AU - Powell, Anthony V.
PY - 2014/6
Y1 - 2014/6
N2 - The thermoelectric behavior of the transition-metal disulfides n-type NiCr2S4 and p-type CuCrS2 has been investigated. Materials prepared by high-temperature reaction were consolidated using cold-pressing and sintering, hot-pressing in graphite dies or spark-plasma sintering in tungsten carbide dies. The consolidation conditions have a marked influence on the electrical transport properties. In addition to the effect on sample density, altering the consolidation conditions results in changes to the sample composition, including the formation of impurity phases. Maximum room-temperature power factors were 0.18 mW m(-1) K-2 and 0.09 mW m(-1) K-2 for NiCr2S4 and CuCrS2, respectively. Thermal conductivities of ca. 1.4 W m(-1) K-1 and 1.2 W m(-1) K-1 lead to figures of merit of 0.024 and 0.023 for NiCr2S4 and CuCrS2, respectively.
AB - The thermoelectric behavior of the transition-metal disulfides n-type NiCr2S4 and p-type CuCrS2 has been investigated. Materials prepared by high-temperature reaction were consolidated using cold-pressing and sintering, hot-pressing in graphite dies or spark-plasma sintering in tungsten carbide dies. The consolidation conditions have a marked influence on the electrical transport properties. In addition to the effect on sample density, altering the consolidation conditions results in changes to the sample composition, including the formation of impurity phases. Maximum room-temperature power factors were 0.18 mW m(-1) K-2 and 0.09 mW m(-1) K-2 for NiCr2S4 and CuCrS2, respectively. Thermal conductivities of ca. 1.4 W m(-1) K-1 and 1.2 W m(-1) K-1 lead to figures of merit of 0.024 and 0.023 for NiCr2S4 and CuCrS2, respectively.
KW - Thermoelectric properties
KW - transition-metal sulfides
KW - hot-pressing
KW - spark plasma sintering
KW - consolidation methods
KW - ANTIFERROMAGNET CUCRS2
KW - PHASE-TRANSFORMATIONS
KW - NEUTRON-DIFFRACTION
KW - NICR2S4
KW - DISORDER
U2 - 10.1007/s11664-013-2941-0
DO - 10.1007/s11664-013-2941-0
M3 - Article
VL - 43
SP - 2029
EP - 2034
JO - Journal of Electronic Materials
JF - Journal of Electronic Materials
SN - 0361-5235
IS - 6
ER -