Lee Go-Eun, Kim Il-Ho
Department of Materials Science and Engineering, College of Engineering, Korea National University of Transportation, Chungju 27469, Korea.
Materials (Basel). 2021 Feb 27;14(5):1116. doi: 10.3390/ma14051116.
Permingeatite (CuSbSe) is a promising thermoelectric material because it has a narrow band gap, large carrier effective mass, and abundant and nontoxic components. Mechanical alloying (MA), which is a high-energy ball mill process, has various advantages, e.g., segregation/evaporation is not required and homogeneous powders can be prepared in a short time. In this study, the effects of MA and hot-pressing (HP) conditions on the synthesis of the CuSbSe phase and its thermoelectric properties were evaluated. The electrical conductivity decreased with increasing HP temperature, while the Seebeck coefficient increased. The power factor (PF) was 0.38-0.50 mW m K and the thermal conductivity was 0.76-0.78 W m K at 623 K. The dimensionless figure of merit, , increased with increasing temperature, and a reliable and maximum value of 0.39 was obtained at 623 K for CuSbSe prepared using MA at 350 rpm for 12 h and HP at 573 K for 2 h.
辉锑硒铜矿（CuSbSe）是一种很有前景的热电材料，因为它具有窄带隙、大载流子有效质量以及丰富且无毒的成分。机械合金化（MA）是一种高能球磨工艺，具有多种优点，例如无需分离/蒸发，并且可以在短时间内制备出均匀的粉末。在本研究中，评估了机械合金化和热压（HP）条件对CuSbSe相合成及其热电性能的影响。电导率随热压温度升高而降低，而塞贝克系数升高。在623 K时，功率因子（PF）为0.38 - 0.50 mW m K，热导率为0.76 - 0.78 W m K。无量纲品质因数随着温度升高而增加，对于在350 rpm下机械合金化12小时并在573 K下热压2小时制备的CuSbSe，在623 K时获得了可靠的最大值0.39。
