The present paper reviews preparation principles, features, applications, existing problems and development trends of several important preparation methods of spherical micro particles, such as cutting, punching-remelting method, atomization, uniform-droplet spray method (UDS) and pulsated orifice ejection method (POEM). In addition, solidification behavior of droplets is particularly pointed out. In summary, POEM is a promising practical method with characteristics of identical size, high sphericity, particle size controllable and the same cooling history, especially in preparing function particles and high melting point materials.%综述了均一球形微米级粒子的几种重要制备方法,包括切丝或打孔重熔法、雾化法、均匀液滴喷射法以及脉冲小孔喷射法等,介绍了各类制备方法的原理、特点、应用、存在的问题及发展趋势等相关的研究现状,并综合指出各类方法产生液滴的冷却凝固行为,从而通过比较分析,得到脉冲小孔喷射法制备的微粒子具有圆球度高、粒子尺寸均匀、粒径可控、热履历一致等优良特点,尤其对于高温或功能粒子的制备方面,该方法具有不可替代的作用.
展开▼
