Electrical Conductivity and Seebeck Coefficient of Sr6Co5O14.3 Single Crystal
Electrical Conductivity and Seebeck Coefficient of Sr6Co5O14.3 Single Crystal
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Sr6Co5O14.3单晶的电导率和塞贝克系数
DOI：
10.1143/jjap.46.256
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发表时间：
2007
影响因子：
1.5
通讯作者：
Y. Arita
中科院分区：
文献类型：
--
作者：
K. Iwasaki;T. Murase;T. Ito;M. Yoshino;T. Matsui;T. Nagasaki;Y. Arita
采用助熔剂法生长了Sr6Co5O14.3棒状单晶，并在空气中研究了300-900 K温度范围内的电导率（σ）、塞贝克系数（S）和功率因数（σS2），以探索其作为热电材料的潜力。 Sr6Co5O14.3 是 Sr6Co5O15 的氧非化学计量相，它是同系 (A3Co2O6)m(A3Co3O9)n [A=Ca, Sr, Ba] 系列的成员，包括 Ca3Co2O6 (m=1, n=0) 和 BaCoO3 (m=0, n=1) 作为端部成员。棒状单晶主要沿Co-O一维链（c轴）生长，由共面的CoO6八面体和CoO6三棱柱组成。沿 Co-O 链的电导率显示出半导体行为（在 300-900 K 的温度范围内为 260-9600 S m-1）。塞贝克系数为正，并随着温度的升高而降低 (280–140 µV K-1)。功率因数随温度升高而增加（0.20×10-4~1.9×10-4 W·m-1 K-2），比多晶Sr6Co5O15大约大一个数量级。
Rod-like single crystals of Sr6Co5O14.3 were grown by the flux method, and the electrical conductivity (σ), Seebeck coefficient (S) and power factor (σS2) were investigated in the temperature range of 300–900 K in air to explore the potential as thermoelectric materials. Sr6Co5O14.3 is an oxygen-nonstoichiometric phase of Sr6Co5O15, which is a member of the homologous (A3Co2O6)m(A3Co3O9)n [A=Ca, Sr, Ba] series including Ca3Co2O6 (m=1, n=0) and BaCoO3 (m=0, n=1) as the end members. The rod-like single crystals mainly grew along Co–O one-dimensional chains (c-axis) consisting of face-sharing CoO6 octahedra and CoO6 triangular prisms. The electrical conductivity along the Co–O chains showed semiconducting behavior (260–9600 S m-1 in the temperature range of 300–900 K). The Seebeck coefficient was positive, and decreased with increasing temperature (280–140 µV K-1). The power factor increased with increasing temperature (0.20×10-4–1.9×10-4 W m-1 K-2), which was about one order of magnitude larger than that of polycrystalline Sr6Co5O15.
影响因子：
3.3
作者：
Mikami, M;Funahashi, R
通讯作者：
Funahashi, R