论文部分内容阅读
超微粉末通常是指粒径为100纳米(nm)到1纳米(nm)~*的微细粒子,这样微细的粒子既不能为人眼所鉴别,也无法由高性能光学显微镜所分辨,只有在电子显微镜下才能观察到它的形态。超微粉末具有与通常微粉显著不同的特性,近年来已经发展成为一类新型的粉末材料。此外,由于超微粉末的粒径与物质的原子、分子的大小可相比拟,因此超微粉末在直接探索原子或分子的奥秘方面也具有重要的科研价值。本文将就超微粉末的特性、制备和应用作一概要的综述。
Ultrafine powder generally refers to fine particles with a particle size of 100 nanometers (nm) to 1 nanometer (nm) *, so fine particles can neither be identified by human eyes nor resolved by high performance optical microscopes. Only in the case of electronic Under the microscope to observe its shape. Ultrafine powders, which have significantly different properties from conventional micronized powders, have been developed in recent years into a new class of powdered materials. In addition, since the particle size of the ultrafine powder is comparable to the size of the atoms and molecules of the material, the ultrafine powder also has important scientific value in directly exploring the mysteries of atoms or molecules. This article will be an overview of the characteristics of ultrafine powder, preparation and application.