Zhu Qing, Kim Hee Seok, Ren Zhifeng
Department of Physics and The Texas Center for Superconductivity, University of Houston, Houston, Texas 77204, USA.
Department of Mechanical Engineering, University of South Alabama, Mobile, Alabama 36608, USA.
Rev Sci Instrum. 2017 Sep;88(9):094902. doi: 10.1063/1.4986965.
The Seebeck coefficient is one of the three important properties in thermoelectric materials. Since thermoelectric materials usually work under large temperature difference in real applications, we propose a quasi-steady state method to accurately measure the Seebeck coefficient under large temperature gradient. Compared to other methods, this method is not only highly accurate but also less time consuming. It can measure the Seebeck coefficient in both the temperature heating up and cooling down processes. In this work, a Zintl material (MgNbSbBiTe) was tested to extract the Seebeck coefficient from room temperature to 573 K. Compared with a commercialized Seebeck coefficient measurement device (ZEM-3), there is ±5% difference between those from ZEM-3 and this method.
塞贝克系数是热电材料的三个重要特性之一。由于热电材料在实际应用中通常在大温差下工作，我们提出了一种准稳态方法来精确测量大温度梯度下的塞贝克系数。与其他方法相比，该方法不仅精度高，而且耗时少。它可以在温度升温和降温过程中测量塞贝克系数。在这项工作中，测试了一种津特耳材料（MgNbSbBiTe），以提取从室温到573 K的塞贝克系数。与商业化的塞贝克系数测量装置（ZEM-3）相比，ZEM-3和该方法测得的结果之间存在±5%的差异。
