Ag取代Co对NaCo/sub 2/O/sub 4/热电性能的影响

Proceedings ICT2001. 20 International Conference on Thermoelectrics (Cat. No.01TH8589) Pub Date : 2001-06-08 DOI:10.1109/ICT.2001.979870

H. Anno, S. Egawa, Y. Imai, K. Matsubara

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引用次数: 0

摘要

研究了Ag取代Co对NaCo/sub 2/O/sub 4/热电性能的影响。以NaCo/sub - 3/、Co/sub - 3/O/sub - 4/和Ag/sub - 2/O为原料，采用固相反应法制备了x=0 ~ 0.4的NaCo/sub - 2-x/Ag/sub -x/ O/sub - 4/化合物。在较宽的温度范围内测量了塞贝克系数、电导率和导热系数。在x=0-0.4时，得到了p型NaCo/sub 2-x/Ag/sub x/O/sub 4/的多晶样品。电导率随组分x的增大而增大，在x=0 ~ 0.2范围内，塞贝克系数与x基本无关。从输运性质出发，结合x射线光电子能谱测量结果，讨论了Ag取代Co对NaCo/ sub2 /O/ sub4 /电子结构和热电性能的影响。

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Effect of Ag substitution for Co on thermoelectric properties of NaCo/sub 2/O/sub 4/

We have investigated the effect of Ag substitution for Co on thermoelectric properties of NaCo/sub 2/O/sub 4/. NaCo/sub 2-x/Ag/sub x/O/sub 4/ compounds with x=0-0.4 were prepared by a solid-state reaction using NaCO/sub 3/, Co/sub 3/O/sub 4/, and Ag/sub 2/O as starting materials. Measurements of the Seebeck coefficient, the electrical conductivity, and the thermal conductivity were made in the wide temperature range. Polycrystalline samples of p-type NaCo/sub 2-x/Ag/sub x/O/sub 4/ were obtained for x=0-0.4. The electrical conductivity increased with increasing composition x, and the Seebeck coefficient was almost independent of x in the range of x=0-0.2. The effect of Ag substitution for Co on the electronic structure and thermoelectric properties of NaCo/sub 2/O/sub 4/ is discussed from the transport properties, together with the results of x-ray photoelectron spectroscopy measurements.

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Proceedings ICT2001. 20 International Conference on Thermoelectrics (Cat. No.01TH8589)

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