摘 要：分析了国内外超微粉的研究现状及主要研究成果，着重研究 了超临界流体溶液快速膨胀法制备聚合物超细粉，探索了超临界流体制 备超微粉的原理及特点，论证了该技术的可行性、应用前景以及目前达 到的水平与存在的问题, 提出了今后发展需要解决的关键问题。 

关键词: 超临界流体；超临界流体溶液快速膨胀法；超细粉体； 热塑性树脂

Abstract: Based on analyzing the state and the major results of the superfine powder investigation, the manufacture of superfine powder by fast expending of supercritical liquid flow is viewed. The mecha nism and characters on the manufacture of superfine powder by fast expending ofsupercriticalliquid flow are presented while the feasibility, application, status, and limitation of this technology are discussed as well as the key technology for the future development is presented. 

Keywords: supercritical liquid flow; fast expending of supercritical liquid flow;superfine powder; thermoplastic resin