高速気流中衝撃法による母粒子被覆過程に及ぼす子粒子の固定化効果
1998 年 35 巻 2 号 p. 111-117
詳細
1998 年 35 巻 2 号 p. 111-117
Recently, there are various studies on the fabrication of composite particles to produce functional materials. Here, the coating mechanism of fine particles by dry impact blending is investigated theoretically and experimentally.
Coating is considered to proceed with small particles transported among the surfaces of large particles and the inner wall. Then the coating rate is reduced by a geometrical obstacle of the small particles on a large-particle surface. Their fixation effect yields the limiting coating ratio.
As a result, the coating ratio and the mobility of small particles on the large particle can be determined by the diameters of the large and small particles and the rotor speed. Therefore, the coating rate depends upon the kinetic energy of the large particle, the impact pressure on the small particle attached to the large particle surface and the kinetic energy of the rotor.
