Comparative Study of the Thermoelectric Properties of Amorphous Zn41Sb59 and Crystalline Zn4Sb3
Comparative Study of the Thermoelectric Properties of Amorphous Zn41Sb59 and Crystalline Zn4Sb3
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DOI：
10.1021/cm802893v
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发表时间：
2009-01
影响因子：
8.6
通讯作者：
Yang Wu;J. Nylén;Craig Naseyowma;N. Newman;F. J. García-García-F.-J.-García-García-1404684409;U. Häussermann
中科院分区：
文献类型：
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作者：
Yang Wu;J. Nylén;Craig Naseyowma;N. Newman;F. J. García-García-F.-J.-García-García-1404684409;U. Häussermann
合金Zn 41 Sb 59的高压合成技术和它的大块非晶性质在环境条件下证实了X射线粉末衍射和电子显微镜研究。在6 ~ 350 K温度范围内测量了Zn 41 Sb 59的电阻率、热电势和热导率。Zn 41 Sb 59是半导体，电阻率数据表明在250 K以上的激活能约为0.25 eV。热电势是正的，并且随着温度的升高而增加。室温电阻率和热电势分别为8 Ω cm和300 μV/K。的热导率的温度依赖性是无定形固体的特征和连续增加从0.08 W/（m K）在6 K到0.19 W/（m K）在室温下。比较了Zn_（41）Sb_（59）的热导率和β-Zn_（43）Sb_3晶体热电材料的晶格热导率，发现两者有很大的相似性，证明了β-Zn_（43）Sb_3晶体热电材料属于声子玻璃材料。
The alloy Zn41Sb59 was synthesized by high-pressure techniques and its bulk amorphous nature at ambient conditions confirmed by X-ray powder diffraction and electron microscopy studies. Electrical resistivity, thermopower, and thermal conductivity of Zn41Sb59 were measured in a temperature range from 6 to 350 K. Zn41Sb59 is a semiconductor and resistivity data suggest an activation energy of about 0.25 eV above 250 K. The thermopower is positive and increases with increasing temperature. Room-temperature values for the resistivity and thermopower are 8 Ω cm and 300 μV/K, respectively. The temperature dependence of the thermal conductivity is characteristic for amorphous solids and continuously increasing from 0.08 W/(m K) at 6 K to 0.19 W/(m K) at room temperature. Comparison of the thermal conductivity of Zn41Sb59 with the thermal lattice conductivity of the crystalline thermoelectric material β-Zn4Sb3 reveals a remarkable resemblance, justifying the classification of the latter as a phonon-glass material.