Thermoelectric Properties of An+2Con+1O3n+3 (A=Ca, Sr, Ba, n=1–5)
Thermoelectric Properties of An+2Con+1O3n+3 (A=Ca, Sr, Ba, n=1–5)
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An+2Con+1O3n+3 (A=Ca, Sr, Ba, n=1–5) 的热电性能
DOI：
10.1143/jjap.43.8208
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发表时间：
2004
影响因子：
1.5
通讯作者：
U. Mizutani
中科院分区：
文献类型：
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作者：
T. Takami;H. Ikuta;U. Mizutani
本文研究了n=1-5的同系系列An+2Con+1 O3 n +3多晶样品的热电性能，其中A代表Ca、Sr或Sr和Ba的适当组合。所有样品的电阻率（ρ）均随温度的升高而单调下降。随着温度的升高，n=1的样品的塞贝克系数（S）减小，而n=2-5的样品的S增加到约900 K。所有样品的功率因数（=S2/ρ）均随温度的升高而增大。n=2的样品表现出最大的功率因数，在1070 K时为0.76 µW/K2 cm。该样品的热导率（κ）很小，在773 K时为1.3 W/K·m，无量纲品质因数（ZT= S2 T/ρκ）随温度升高而增大。通过将κ外推到高温，在n=2的样品的情况下，ZT估计在1070 K达到0.054。
We studied the thermoelectric properties of polycrystalline samples of the n=1–5 members of the homologous series An+2Con+1O3n+3, where A represents Ca, Sr, or an appropriate combination of Sr and Ba. The electrical resistivity (ρ) decreased monotonically with increasing temperature in all samples. With increasing temperature, the Seebeck coefficient (S) of the n=1 sample decreased, while S of the n=2–5 samples increased up to about 900 K. The power factor (=S2/ρ) increased with temperature in all samples. The n=2 sample exhibited the largest power factor, which was 0.76 µW/K2cm at 1070 K. The thermal conductivity (κ) of this sample was very small, 1.3 W/K·m at 773 K, and the dimensionless figure of merit (ZT=S2T/ρκ) increased with temperature. By extrapolating κ to high temperatures, ZT was estimated to reach 0.054 at 1070 K in the case of the n=2 sample.