Thermoelectric properties of Ba3Co2O6(CO3)0.7 containing one-dimensional CoO6 octahedral columns

被引：12

作者：

Iwasaki, Kouta ^{[1
]}

Yamamoto, Teruhisa ^{[1
]}

Yamane, Hisanori ^{[2
]}

Takeda, Takashi ^{[3
]}

Arai, Shigeo ^{[4
]}

Miyazaki, Hidetoshi ^{[5
]}

Tatsumi, Kazuyoshi ^{[1
]}

Yoshino, Masahito ^{[1
]}

Ito, Tsuyoshi ^{[1
]}

Arita, Yuji ^{[4
]}

Muto, Shunsuke ^{[1
]}

Nagasaki, Takanori ^{[4
]}

Matsui, Tsuneo ^{[1
,4
]}

机构：

[1] Nagoya Univ, Grad Sch Engn, Dept Mat Phys & Energy Engn, Chikusa Ku, Nagoya, Aichi 4648603, Japan

[2] Tohoku Univ, Inst Multidisciplinary Res Adv Mat, Aoba Ku, Sendai, Miyagi 9808577, Japan

[3] Natl Inst Mat Sci, Tsukuba, Ibaraki 3050044, Japan

[4] Nagoya Univ, EcoTopia Sci Inst, Chikusa Ku, Nagoya, Aichi 4648603, Japan

[5] Natl Inst Nat Sci, Inst Mol Sci, UVSOR Facil, Okazaki, Aichi 4448585, Japan

来源：

JOURNAL OF APPLIED PHYSICS | 2009年 / 106卷 / 03期

关键词：

barium compounds; crystal growth from solution; electrical conductivity; Seebeck effect; semiconductor materials; SINGLE-CRYSTAL; HEXAGONAL PEROVSKITE; SEEBECK COEFFICIENT; CA3CO2O6; FAMILY; OXIDES; SERIES; SR6CO5O15; MEMBERS; SR;

D O I：

10.1063/1.3174428

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

The thermoelectric properties of Ba3Co2O6(CO3)(0.7) have been investigated using prismatic single crystals elongated along the c axis. Ba3Co2O6(CO3)(0.7) has a pseudo-one-dimensional structure similar to that of 2H perovskite-type BaCoO3 and contains CoO6 octahedral columns running parallel to the c axis. The prismatic crystals are grown by a flux method using a K2CO3-BaCl2 flux. The electrical conductivity (sigma) along the columns (c axis) exhibits a metallic behavior (670-320 S cm(-1) in the temperature range of 300-1100 K), whereas the temperature dependence of the electrical conductivity perpendicular to the c axis is semiconducting. The Seebeck coefficient (S) along the columns is positive and greater than 100 mu V K-1 over the measured temperature range (116-128 mu V K-1). Ba3Co2O6(CO3)(0.7) shows power factors (sigma S-2) of 5.5x10(-4)-9.0x10(-4) W m(-1) K-2 above room temperature, relatively high values for an oxide material.

引用

页数：5

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