Effects of Nb doping on thermoelectric properties of Zn4Sb3 at high temperatures

D. Li; H. H. Hng; J. Ma; X. Y. Qin

doi:10.1557/jmr.2009.0058

Effects of Nb doping on thermoelectric properties of Zn₄Sb₃ at high temperatures

D. Li, H. H. Hng^*, J. Ma, X. Y. Qin

^*Corresponding author for this work

Research output: Contribution to journal › Article › peer-review

38 Citations (Scopus)

Abstract

The thermoelectric properties of Nb-doped Zn₄Sb₃ compounds, (Zn_1-x Nb_x)₄Sb₃ (x = 0, 0.005, and 0.01), were investigated at temperatures ranging from 300 to 685 K. The results showed that by substituting Zn with Nb, the thermal conductivities of all the Nb- doped compounds were lower than that of the pristine β-Zn₄Sb₃. Among the compounds studied, the lightly substituted (Zn_0.995 Nb_0.005)₄Sb₃ compound exhibited the best thermoelectric performance due to the improvement in both its electrical resistivity and thermal conductivity. Its figure of merit, ZT, was greater than the undoped Zn₄Sb₃ compound for the temperature range investigated. In particular, the ZT of (Zn_0.995 Nb_0.005)₄ Sb₃ reached a value of 1.1 at 680 K, which was 69% greater than that of the undoped Zn₄Sb₃ obtained in this study.

Original language	English
Pages (from-to)	430-435
Number of pages	6
Journal	Journal of Materials Research
Volume	24
Issue number	2
DOIs	https://doi.org/10.1557/jmr.2009.0058
Publication status	Published - Feb 2009
Externally published	Yes

ASJC Scopus Subject Areas

General Materials Science
Condensed Matter Physics
Mechanics of Materials
Mechanical Engineering

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title = "Effects of Nb doping on thermoelectric properties of Zn4Sb3 at high temperatures",

abstract = "The thermoelectric properties of Nb-doped Zn4Sb3 compounds, (Zn1-x Nbx)4Sb3 (x = 0, 0.005, and 0.01), were investigated at temperatures ranging from 300 to 685 K. The results showed that by substituting Zn with Nb, the thermal conductivities of all the Nb- doped compounds were lower than that of the pristine β-Zn4Sb3. Among the compounds studied, the lightly substituted (Zn0.995 Nb0.005)4Sb3 compound exhibited the best thermoelectric performance due to the improvement in both its electrical resistivity and thermal conductivity. Its figure of merit, ZT, was greater than the undoped Zn4Sb3 compound for the temperature range investigated. In particular, the ZT of (Zn0.995 Nb0.005)4 Sb3 reached a value of 1.1 at 680 K, which was 69% greater than that of the undoped Zn4Sb3 obtained in this study.",

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AU - Li, D.

AU - Hng, H. H.

AU - Ma, J.

AU - Qin, X. Y.

PY - 2009/2

Y1 - 2009/2

N2 - The thermoelectric properties of Nb-doped Zn4Sb3 compounds, (Zn1-x Nbx)4Sb3 (x = 0, 0.005, and 0.01), were investigated at temperatures ranging from 300 to 685 K. The results showed that by substituting Zn with Nb, the thermal conductivities of all the Nb- doped compounds were lower than that of the pristine β-Zn4Sb3. Among the compounds studied, the lightly substituted (Zn0.995 Nb0.005)4Sb3 compound exhibited the best thermoelectric performance due to the improvement in both its electrical resistivity and thermal conductivity. Its figure of merit, ZT, was greater than the undoped Zn4Sb3 compound for the temperature range investigated. In particular, the ZT of (Zn0.995 Nb0.005)4 Sb3 reached a value of 1.1 at 680 K, which was 69% greater than that of the undoped Zn4Sb3 obtained in this study.

AB - The thermoelectric properties of Nb-doped Zn4Sb3 compounds, (Zn1-x Nbx)4Sb3 (x = 0, 0.005, and 0.01), were investigated at temperatures ranging from 300 to 685 K. The results showed that by substituting Zn with Nb, the thermal conductivities of all the Nb- doped compounds were lower than that of the pristine β-Zn4Sb3. Among the compounds studied, the lightly substituted (Zn0.995 Nb0.005)4Sb3 compound exhibited the best thermoelectric performance due to the improvement in both its electrical resistivity and thermal conductivity. Its figure of merit, ZT, was greater than the undoped Zn4Sb3 compound for the temperature range investigated. In particular, the ZT of (Zn0.995 Nb0.005)4 Sb3 reached a value of 1.1 at 680 K, which was 69% greater than that of the undoped Zn4Sb3 obtained in this study.

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Effects of Nb doping on thermoelectric properties of Zn₄Sb₃ at high temperatures

Abstract

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