Thermoelectric properties of Ag1−xPb18SbTe20 (x = 0, 0.1, 0.3)
Thermoelectric properties of Ag1−xPb18SbTe20 (x = 0, 0.1, 0.3)
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DOI：
10.1016/j.jallcom.2004.06.051
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发表时间：
2005-01
影响因子：
6.2
通讯作者：
A. Kosuga;M. Uno;K. Kurosaki;S. Yamanaka
中科院分区：
文献类型：
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作者：
A. Kosuga;M. Uno;K. Kurosaki;S. Yamanaka
通过固相反应制备了 Ag1−xPb18SbTe20(x = 0, 0.1, 0.3) 的多晶烧结样品。在室温下通过超声波脉冲回波法测量纵向和剪切声速，以评估弹性模量和德拜温度。 Ag1−xPb18SbTe20 的弹性模量和德拜温度随着 x 值的增加而降低。测量从室温到约700K的热扩散率。导热率由热扩散率和热容量来评价。 AgPb18SbTe20 的导热系数在 370K 时为 1.04Wm−1K−1。利用前期研究中获得的电阻率和塞贝克系数数据评估了Ag1−xPb18SbTe20的无量纲品质因数ZT。 Ag0.7Pb18SbTe20 的 ZT 最大值在 673K 时为 0.33。
Polycrystalline sintered samples of Ag1−xPb18SbTe20(x = 0, 0.1, 0.3) were prepared by a solid-state reaction. The longitudinal and shear sound velocities were measured by an ultrasonic pulse-echo method at room temperature in order to evaluate the elastic moduli and Debye temperature. The elastic moduli and Debye temperature for Ag1−xPb18SbTe20decrease with increasing x value. The thermal diffusivity was measured from room temperature to about 700K. The thermal conductivity was evaluated from the thermal diffusivity and heat capacity. The value of thermal conductivity is 1.04Wm−1K−1at 370K for AgPb18SbTe20. The dimensionless figure of merit ZT of Ag1−xPb18SbTe20was evaluated by using the data of the electrical resistivity and Seebeck coefficient obtained in the previous study. The maximum value of ZT is 0.33 at 673K for Ag0.7Pb18SbTe20.