块状物质经微细化制成粒径在0.1微米以下的细粒叫做超微粒子。块状物质一经制成粉状就会发现金属呈块状时看不到的各种特性(如化学反应性、电磁、光学、热等性质)。当前,利用这样的特性可以开发化学触媒、磁记录材料、导电涂料、透光性陶瓷、集成电路用 Particles made of micronized particles smaller than 0.1 microns in size called ultrafine particles. Once made into a powdery mass, the lumps of material can be found in various properties (such as chemical reactivity, electromagnetism, optics, heat, etc.) that the metal can not be seen in lumps. At present, chemical catalysts, magnetic recording materials, conductive coatings, translucent ceramics, integrated circuits