Thermoelectric properties of Bi and Cu co-doped Ca3Co 2O6single crystals

Junichi Takahashi; Masahiko Shimada; Kouta Iwasaki; Hisanori Yaname

doi:10.1007/s10832-006-9945-6

Thermoelectric properties of Bi and Cu co-doped Ca₃Co ₂O₆single crystals

Junichi Takahashi, Masahiko Shimada, Kouta Iwasaki, Hisanori Yaname

IMRAM - Division of Inorganic Material Research

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

7 Citations (Scopus)

Abstract

Single crystals of Bi and Cu-doped Ca₃Co₂O ₆were synthesized in a molten K₂CO₃flux. Using an obtained single crystal of (Ca_0.985(5)Bi_0.015(5)) ₃(Co_0.990(3)Cu_0.010(3))₂O ₆elongated to the c-axis direction of the crystal structure, the electric resistivity (ρ) and Seebeck coefficient (S) were measured from room temperature to over 1000 K in air. The single crystal showed p-type semiconducting behavior with ρ values of 1.8 Ω cm at 303 K and 0.017 Ω cm at 1000 K. The S values were +254 μ VK^{- 1} at 325 K, +360 μ VK^{- 1} at 420 K, and +214 μ VK^{- 1} at 1000 K. The power factor (S ² ρ ^{- 1}) increased with an increase of temperature and attained 2.70 × 10^{- 4} Wm ^{- 1}K^{- 2} at 1000 K.

Original language	English
Pages (from-to)	95-98
Number of pages	4
Journal	Journal of Electroceramics
Volume	17
Issue number	1
DOIs	https://doi.org/10.1007/s10832-006-9945-6
Publication status	Published - 2006 Sept

Keywords

CaCoO
Power factor
Single crystals
Thermoelectric materials

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10.1007/s10832-006-9945-6

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title = "Thermoelectric properties of Bi and Cu co-doped Ca3Co 2O6single crystals",

abstract = "Single crystals of Bi and Cu-doped Ca3Co2O 6were synthesized in a molten K2CO3flux. Using an obtained single crystal of (Ca0.985(5)Bi0.015(5)) 3(Co0.990(3)Cu0.010(3))2O 6elongated to the c-axis direction of the crystal structure, the electric resistivity (ρ) and Seebeck coefficient (S) were measured from room temperature to over 1000 K in air. The single crystal showed p-type semiconducting behavior with ρ values of 1.8 Ω cm at 303 K and 0.017 Ω cm at 1000 K. The S values were +254 μ VK- 1 at 325 K, +360 μ VK- 1 at 420 K, and +214 μ VK- 1 at 1000 K. The power factor (S 2 ρ - 1) increased with an increase of temperature and attained 2.70 × 10- 4 Wm - 1K- 2 at 1000 K.",

keywords = "CaCoO, Power factor, Single crystals, Thermoelectric materials",

author = "Junichi Takahashi and Masahiko Shimada and Kouta Iwasaki and Hisanori Yaname",

note = "Funding Information: Acknowledgment This work was partially supported by Japan Society for the Promotion of Science, the Grant-in-Aid for Scientific Research, by The Japan Securities Scholarship Foundation, The Thermal and Electric Energy Technology Foundation, and by The Collaborative Research in Center for Interdisciplinary Research, Tohoku University. The authors would like to thank Y. Sato and T. Kamaya for EPMA measurement.",

year = "2006",

month = sep,

doi = "10.1007/s10832-006-9945-6",

language = "English",

volume = "17",

pages = "95--98",

journal = "Journal of Electroceramics",

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TY - JOUR

T1 - Thermoelectric properties of Bi and Cu co-doped Ca3Co 2O6single crystals

AU - Takahashi, Junichi

AU - Shimada, Masahiko

AU - Iwasaki, Kouta

AU - Yaname, Hisanori

N1 - Funding Information: Acknowledgment This work was partially supported by Japan Society for the Promotion of Science, the Grant-in-Aid for Scientific Research, by The Japan Securities Scholarship Foundation, The Thermal and Electric Energy Technology Foundation, and by The Collaborative Research in Center for Interdisciplinary Research, Tohoku University. The authors would like to thank Y. Sato and T. Kamaya for EPMA measurement.

PY - 2006/9

Y1 - 2006/9

N2 - Single crystals of Bi and Cu-doped Ca3Co2O 6were synthesized in a molten K2CO3flux. Using an obtained single crystal of (Ca0.985(5)Bi0.015(5)) 3(Co0.990(3)Cu0.010(3))2O 6elongated to the c-axis direction of the crystal structure, the electric resistivity (ρ) and Seebeck coefficient (S) were measured from room temperature to over 1000 K in air. The single crystal showed p-type semiconducting behavior with ρ values of 1.8 Ω cm at 303 K and 0.017 Ω cm at 1000 K. The S values were +254 μ VK- 1 at 325 K, +360 μ VK- 1 at 420 K, and +214 μ VK- 1 at 1000 K. The power factor (S 2 ρ - 1) increased with an increase of temperature and attained 2.70 × 10- 4 Wm - 1K- 2 at 1000 K.

AB - Single crystals of Bi and Cu-doped Ca3Co2O 6were synthesized in a molten K2CO3flux. Using an obtained single crystal of (Ca0.985(5)Bi0.015(5)) 3(Co0.990(3)Cu0.010(3))2O 6elongated to the c-axis direction of the crystal structure, the electric resistivity (ρ) and Seebeck coefficient (S) were measured from room temperature to over 1000 K in air. The single crystal showed p-type semiconducting behavior with ρ values of 1.8 Ω cm at 303 K and 0.017 Ω cm at 1000 K. The S values were +254 μ VK- 1 at 325 K, +360 μ VK- 1 at 420 K, and +214 μ VK- 1 at 1000 K. The power factor (S 2 ρ - 1) increased with an increase of temperature and attained 2.70 × 10- 4 Wm - 1K- 2 at 1000 K.

KW - CaCoO

KW - Power factor

KW - Single crystals

KW - Thermoelectric materials

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Thermoelectric properties of Bi and Cu co-doped Ca₃Co ₂O₆single crystals

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