中文摘要：

利用惰性气体保护蒸发-冷凝法制备了碲（Te）纳米粉体颗粒。通过热力学计算得到碲的蒸汽压随温度的变化关系。利用X射线衍射（XRD）、透射电子显微镜（TEM）、激光粒度仪观测了碲纳米颗粒的晶体结构、形貌,并研究了粉末粒径、分布及形貌与蒸发冷凝过程中气氛压力的关系。结果表明,随着气氛压力的增加,粉末粒径分布范围变窄,粉末粒度随着气氛压力的减小而逐渐减小。当电流恒定为50A,充气压力从30kPa降到5kPa时,碲粉末的平均粒径由200nm减小到20～80nm。

英文摘要：

Telluride nanoparticles were prepared＇ by inert-gas condensation. The crystal structure, morphologies and particle size distribution of the sample were characterized by X-ray diffraction （XRD）, transmission electron microscopy （TEM）, and laser particle analyzer. The results indicate that the prepared nanoparticles of four kinds have uniform size, high purity, narrow size distribution and spherical shape. As the working pressure is from 30 to 5kPa at constant electric current of 50A, the average diameters of the nanoparticles of Te and Bi decrease from 200nm to 20-80nm.