LOW ENERGY MILLING TO PRODUCE FLAKE POWDERS

摘要

To provide: a method for increasing surface area of a valve metal particle without generating unacceptable levels of metallic impurities; and improved valve metal particles.SOLUTION: The method includes: charging a mill apparatus with a valve metal powder and media, the media having an average diameter from 0.01 cm to 0.3175 cm inclusive; and milling it at an average kinetic energy of no more than 3,000 ergs per media particle to obtain a milled powder.SELECTED DRAWING: Figure 2