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To avoid overpressure, we ground the sample in steps of 5 minutes, followed by a programmed pausing time of 10 minutes. After several cycles, the outside temperature of the bowl should be checked (remain below 80°C); grinding time or programmed pausing time might be readjusted afterwards.
Fineness has been checked with our Laser Particle Sizer ANALYSETTE 22 NanoTec.
Result after 30min: d50<1,3µm ; d90<2,9µm
Result after 60min: d50<0,75µm ; d90<2,1µm
Result after 120min: d50 < 0,5µm; d90 < 1,5µm
Desired endfineness has been reached after a total grinding time of 120 minutes.
A better endfineness can be achieved by grinding the sample with the Planetary Micro Mill PULVERISETTE 7 premium line (with up to 1100 rpm).
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