MAKING PARTICULATES OF CONTROLLED DIMENSIONS

摘要

Particulates are made, especially magnetic Fe-Co alloys having high magnetic permeability, of controlled dimensions, especially those having a narrow thickness size distribution centered around a median or target thickness in the range of about 0.1-1.0 νm, using electrodeposition typically on a smooth (polished) titanium cathode (30). The preferred continuous process uses a rotating drum cathode (30) inside a fixed anode (33) to grow flakes and to produce them automatically by inherent instability in the deposited shed into the electrolyte (12) where they are separated in a magnetic separator or other suitable device. If the flakes are soft iron or iron-cobalt alloys, the drum (30) generally is titanium or titanium alloy.