Ordered-defect sulfides as thermoelectric materials

Andreas Kaltzoglou; Paz Vaqueiro; Tristan Barbier; Emmanuel Guilmeau; Anthony V. Powell

doi:10.1007/s11664-013-2941-0

Ordered-defect sulfides as thermoelectric materials

Andreas Kaltzoglou, Paz Vaqueiro, Tristan Barbier, Emmanuel Guilmeau, Anthony V. Powell

Research output: Contribution to journal › Article

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	https://doi.org/10.1007/s11664-013-2941-0
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

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10.1007/s11664-013-2941-0

Cite this

Kaltzoglou, A., Vaqueiro, P., Barbier, T., Guilmeau, E., & Powell, A. V. (2014). Ordered-defect sulfides as thermoelectric materials. Journal of Electronic Materials, 43(6), 2029-2034. https://doi.org/10.1007/s11664-013-2941-0

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title = "Ordered-defect sulfides as thermoelectric materials",

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.",

keywords = "Thermoelectric properties, transition-metal sulfides, hot-pressing, spark plasma sintering, consolidation methods, ANTIFERROMAGNET CUCRS2, PHASE-TRANSFORMATIONS, NEUTRON-DIFFRACTION, NICR2S4, DISORDER",

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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

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DO - 10.1007/s11664-013-2941-0

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SP - 2029

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JO - Journal of Electronic Materials

JF - Journal of Electronic Materials

SN - 0361-5235

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