碳化硅纳米粉体研究进展

Research progress on nano-sized SiC powder

碳化硅纳米粉体性能优于传统的碳化硅粉体,能够达到高新技术领域的严格要求,具有更为广泛的用途。综述了近年来在高新技术领域发展起来的碳化硅纳米粉体的制备方法,对一些新的制备方法进行了重点介绍,阐述了各种方法的基本原理、特点及研究现状,并对各种方法进行了比较。碳热还原法原料便宜,质量稳定,易实现工业化生产;液相法可制得纯度高的纳米级微粉;气相法是目前比较先进的方法,但不易实现大批量生产。未来碳热还原法将继续占主导地位,提出了该领域科学工作者的努力方向。

With better performances than the traditional SiC powder, the nano- sized SiC powder can meet the strict demands in the new high - tech fields and has more extensive uses. This paper summarized the preparation methods of nano - sized SiC powder developed in the new high - tech fields in recent years and put emphasis on introducing some new preparation methods. Moreover, the basic principle, characteristics and current research situation of those methods were set forth and comparasion was made among different method. For example, carbothermal reduction method is characterized by cheap raw material,stable quality,easy to realize industrialization etc. ;the nano- sized powder made by liquid- phase method is high in purity ; gas - phase method is a relatively advanced method currently, but it is different to realize batch progress. This paper also pointed out the carbothermal reduction method will continue taking the dominant place in future. Additionally ,the direction which the scientificos of this field should go ahead was put forward.