Wang Yanan, Bourgès Cédric, Rajamathi Ralph, Nethravathi C, Rajamathi Michael, Mori Takao
International Center for Materials Nanoarchitectonics (WPI-MANA), National Institute for Materials Science (NIMS), Namiki 1-1, Tsukuba 305-0044, Japan.
Graduate School of Pure and Applied Sciences, Tsukuba University, Tennoudai 1-1-1, Tsukuba 305-8671, Japan.
Materials (Basel). 2021 Dec 22;15(1):53. doi: 10.3390/ma15010053.
In this work, a series of BiTe/X mol% MoS (X = 0, 25, 50, 75) bulk nanocomposites were prepared by hydrothermal reaction followed by reactive spark plasma sintering (SPS). X-ray diffraction analysis (XRD) indicates that the native nanopowders, comprising of BiTe/MoS heterostructure, are highly reactive during the electric field-assisted sintering by SPS. The nano-sized MoS particles react with the BiTe plates matrix forming a mixed-anion compound, BiTeS, at the interface between the nanoplates. The transport properties characterizations revealed a significant influence of the nanocomposite structure formation on the native electrical conductivity, Seebeck coefficient, and thermal conductivity of the initial BiTe matrix. As a result, enhanced values have been obtained in BiTe/25 mol% MoS over the temperature range of 300-475 K induced mainly by a significant increase in the electrical conductivity.
在本工作中，通过水热反应然后进行反应性放电等离子体烧结（SPS）制备了一系列BiTe/X mol% MoS（X = 0、25、50、75）块状纳米复合材料。X射线衍射分析（XRD）表明，由BiTe/MoS异质结构组成的原始纳米粉末在SPS电场辅助烧结过程中具有高反应活性。纳米尺寸的MoS颗粒与BiTe板状基体反应，在纳米板之间的界面处形成混合阴离子化合物BiTeS。输运性质表征揭示了纳米复合材料结构形成对初始BiTe基体的本征电导率、塞贝克系数和热导率有显著影响。结果，在300 - 475 K温度范围内，BiTe/25 mol% MoS的相关值得到增强，这主要是由电导率的显著增加引起的。
