WS2纳米颗粒的合成及摩擦学性能研究

将自制的WO₃纳米颗粒前驱体与S粉混合,在自制的反应装置氢气氛中,于550～750 ℃下煅烧得到二硫化钨纳米颗粒，反应中用H₂代替H₂S以减少对周围环境的污染。该合成路线简单且产物纯度高。用XRD、SEM、TEM和HRTEM对二硫化钨纳米结构进行了表征和分析,并将WS₂纳米颗粒作为添加剂添加到N40基础油中，在MS-T3000摩擦磨损仪测试其摩擦学性能。结果显示:制备的二硫化钨颗粒平均粒径在50 nm以内，其形状为球形或类球形。WS₂纳米颗粒作为普通润滑油的纳米级固体添加剂表现出了较优异的摩擦学性能。

Synthesis and Tribological Properties of WS2 Nanoparticles

The WS₂ nanoparticles were synthesized by a reaction of the precursor of tungsten-oxide nanoparticles with sulfur powder under hydrogen atmosphere. The reaction was accomplished in a home-made reactor and hydrogen was used as reducing gas instead of H₂S to minimize the pollution caused by using H₂S. The synthesis route was simple and high-purity products could thus be obtained. The structure and morphology of the products were characterized by XRD, SEM, TEM and high resolution transmission electronic microscope (HRTEM). As an additive for base oil, the tribological properties of WS₂ nanoparticles were measured by MS-T3000-instrument. The results show that the nanoparticles thus prepared are in spherical-like shape with an average size of less than 50 nm. It is revealed that the WS₂ nanoparticles have excellent tribological performance as an additive to base oil.