Thermoelectric properties of CaMnO3 system

R. Funahashi; A. Kosuga; N. Miyasou; E. Takeuchi; S. Urata; K. Lee; H. Ohta; K. Koumoto

doi:10.1109/ICT.2007.4569439

Thermoelectric properties of CaMnO₃ system

R. Funahashi, A. Kosuga, N. Miyasou, E. Takeuchi, S. Urata, K. Lee, H. Ohta, K. Koumoto

Department of Materials Science and Engineering

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution

21 Citations (Scopus)

Abstract

Ca_1-xRE_xMnO₃ (RE: Nd, Tb, Ho, Yb, Lu, x = 0.1 and 0.2) bulks were prepared by a solid state reaction. They show metallic behavior at temperatures higher than about 400 K and electrical resistivity ρ is lower than 12 mΩ cm at 1000 K in air. Absolute values of Seebeck coefficient S increases with temperature up to 973 K for all samples except Ca_0.9Yb_0.1MnO₃ at 973 K. For Ca _0.9Lu_0.1MnO₃, S value reaches -130 μV/K at 973 K. Both thermoelectric properties are dominated mainly by crystallographic structure. Power factor PF (=S²/ρ) increases with decreasing cell volume. Thermal conductivity K of Yb- and Lu-substituted samples is as low as 1.5 W/m-K² and dimension-less figure of merit ZT reaches 0.16 at 973 K for Ca_0.8Lu_0.2MnO₃ in air.

Original language	English
Title of host publication	Proceedings ICT'07 - 26th International Conference on Thermoelectrics
Pages	124-128
Number of pages	5
DOIs	https://doi.org/10.1109/ICT.2007.4569439
Publication status	Published - 2007
Event	ICT'07 - 26th International Conference on Thermoelectrics - Jeju, Korea, Republic of Duration: 2007 Jun 3 → 2007 Jun 7

Publication series

Name	International Conference on Thermoelectrics, ICT, Proceedings

Other

Other	ICT'07 - 26th International Conference on Thermoelectrics
Country/Territory	Korea, Republic of
City	Jeju
Period	07/6/3 → 07/6/7

All Science Journal Classification (ASJC) codes

Engineering(all)

Access to Document

10.1109/ICT.2007.4569439

Cite this

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title = "Thermoelectric properties of CaMnO3 system",

abstract = "Ca1-xRExMnO3 (RE: Nd, Tb, Ho, Yb, Lu, x = 0.1 and 0.2) bulks were prepared by a solid state reaction. They show metallic behavior at temperatures higher than about 400 K and electrical resistivity ρ is lower than 12 mΩ cm at 1000 K in air. Absolute values of Seebeck coefficient S increases with temperature up to 973 K for all samples except Ca0.9Yb0.1MnO3 at 973 K. For Ca 0.9Lu0.1MnO3, S value reaches -130 μV/K at 973 K. Both thermoelectric properties are dominated mainly by crystallographic structure. Power factor PF (=S2/ρ) increases with decreasing cell volume. Thermal conductivity K of Yb- and Lu-substituted samples is as low as 1.5 W/m-K2 and dimension-less figure of merit ZT reaches 0.16 at 973 K for Ca0.8Lu0.2MnO3 in air.",

author = "R. Funahashi and A. Kosuga and N. Miyasou and E. Takeuchi and S. Urata and K. Lee and H. Ohta and K. Koumoto",

year = "2007",

doi = "10.1109/ICT.2007.4569439",

language = "English",

isbn = "9781424422623",

series = "International Conference on Thermoelectrics, ICT, Proceedings",

pages = "124--128",

booktitle = "Proceedings ICT'07 - 26th International Conference on Thermoelectrics",

note = "ICT'07 - 26th International Conference on Thermoelectrics ; Conference date: 03-06-2007 Through 07-06-2007",

}

Funahashi, R, Kosuga, A, Miyasou, N, Takeuchi, E, Urata, S, Lee, K, Ohta, H & Koumoto, K 2007, Thermoelectric properties of CaMnO₃ system. in Proceedings ICT'07 - 26th International Conference on Thermoelectrics., 4569439, International Conference on Thermoelectrics, ICT, Proceedings, pp. 124-128, ICT'07 - 26th International Conference on Thermoelectrics, Jeju, Korea, Republic of, 07/6/3. https://doi.org/10.1109/ICT.2007.4569439

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T1 - Thermoelectric properties of CaMnO3 system

AU - Funahashi, R.

AU - Kosuga, A.

AU - Miyasou, N.

AU - Takeuchi, E.

AU - Urata, S.

AU - Lee, K.

AU - Ohta, H.

AU - Koumoto, K.

PY - 2007

Y1 - 2007

N2 - Ca1-xRExMnO3 (RE: Nd, Tb, Ho, Yb, Lu, x = 0.1 and 0.2) bulks were prepared by a solid state reaction. They show metallic behavior at temperatures higher than about 400 K and electrical resistivity ρ is lower than 12 mΩ cm at 1000 K in air. Absolute values of Seebeck coefficient S increases with temperature up to 973 K for all samples except Ca0.9Yb0.1MnO3 at 973 K. For Ca 0.9Lu0.1MnO3, S value reaches -130 μV/K at 973 K. Both thermoelectric properties are dominated mainly by crystallographic structure. Power factor PF (=S2/ρ) increases with decreasing cell volume. Thermal conductivity K of Yb- and Lu-substituted samples is as low as 1.5 W/m-K2 and dimension-less figure of merit ZT reaches 0.16 at 973 K for Ca0.8Lu0.2MnO3 in air.

AB - Ca1-xRExMnO3 (RE: Nd, Tb, Ho, Yb, Lu, x = 0.1 and 0.2) bulks were prepared by a solid state reaction. They show metallic behavior at temperatures higher than about 400 K and electrical resistivity ρ is lower than 12 mΩ cm at 1000 K in air. Absolute values of Seebeck coefficient S increases with temperature up to 973 K for all samples except Ca0.9Yb0.1MnO3 at 973 K. For Ca 0.9Lu0.1MnO3, S value reaches -130 μV/K at 973 K. Both thermoelectric properties are dominated mainly by crystallographic structure. Power factor PF (=S2/ρ) increases with decreasing cell volume. Thermal conductivity K of Yb- and Lu-substituted samples is as low as 1.5 W/m-K2 and dimension-less figure of merit ZT reaches 0.16 at 973 K for Ca0.8Lu0.2MnO3 in air.

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BT - Proceedings ICT'07 - 26th International Conference on Thermoelectrics

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