Development of Process for Manufacturing Metal-Nonmetal Composite Particles Using Fluidized-Bed in Electro-Magnetic Field.

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  • 電磁流動層による金属・非金属複合粒子作成プロセスの開発
  • デンジ リュウドウソウ ニヨル キンゾク ヒキンゾク フクゴウ リュウシ サク

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Abstract

To develop a new process producing metal-particles coated by non-conductive powder, the coating mechanism is investigated using a fluidized bed under an electro-magnetic force.<BR>Coating experiments are carried out in a fluidized bed column under an inert (N2) atmosphere : After an assigned amount of non-conductive powder is fluidized in the bed column installed in a magnetic coil, a small amount of metal-particles is fed into the bed and recovered in the form of metal coated with non-conductive powder.<BR>The following results is obtained from the morphological measurement of coated film or powder.<BR>1) There are two coating mechanisms, depending on whether the melting point of non-conductive powder is higher or lower than that of metal particles.<BR>2) There are coating limits depending power supply, gas velocity and the melting point of plastics.<BR>3) Coating thickness is increased with heating power.

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