The Fixation Effect of Fine Particles on the Coating Mechanism by Dry Impact Blending

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 amon...

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Bibliographic Details
Published inFuntai Kogakkaishi Vol. 35; no. 2; pp. 111 - 117
Main Authors SHINOHARA, Kunio, OTOMURA, Yukiaki, UCHIYAMA, Tomoyuki, MINOSHIMA, Hironori
Format Journal Article
LanguageEnglish
Published The Society of Powder Technology, Japan 1998
Subjects
Dry Impact Blending
Fixation Effect
Mechanical Particle Coating
Powder
Wall Effect
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Summary: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.
ISSN:0386-6157
1883-7239
DOI:10.4164/sptj.35.111