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一、前言粒径是指固态粒状物质的颗粒直径,一定粒径间隔内粒径的百分比称作粒径分布。根据材料的粒径分布可计算出颗粒的体均粒径(D_v)和中心粒径(d_(50))。粒径和粒径分布是材料性能的重要参数之一。例如电子发射材料碳酸盐(BaCO_3,CaCO_3、SrCO_3),若材料粒径的大小不同,则涂覆在金属基片上的粘附牢度,电子起始发
I. Introduction The particle size refers to the particle diameter of the solid particulate material. The percentage of the particle size within a certain particle size interval is called the particle size distribution. According to the particle size distribution of the material, the volume average particle diameter (D_v) and the center particle diameter (d_ (50)) of the particles can be calculated. Particle size and particle size distribution is one of the important parameters of material properties. For example, the electron emission material carbonate (BaCO_3, CaCO_3, SrCO_3), if the size of the material particle size is different, the coating on the metal substrate adhesion fastness,