Patent ID: 7264183

Claim:
A process for the production of a milled material, having a narrow particle distribution, which comprises a) comminuting a starting powder having a grain size of 5 to 100 μm, and a residual moisture content of less than 1% by weight, b) by a gas, in a jet mill having an integrated or external, dynamic air classifiers, c) wherein the gas produces a specific milling energy input which, measured in kJ/kg, based on the starting powder introduced, depending on the median value d 50 of the resulting grain size of milled material, measured in μm, does not exceed the following values: from 2 up to and including 3 μm: 6000 kJ/kg; from 3 up to and including 4 μm: 2000 kJ/kg; from 4 up to and including 7 μm: 1000 kJ/kg; from 7 up to and including 12 μm: 500 kJ/kg and >12 μm: 100 kJ/kg.