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M080271 | |
Geology / mineralogy | |
<30µm | |
d50<0,5µm | |
5g | |
We recommend using a Planetary Mill like Planetary Mono Mill PULVERISETTE 6 classic line. For a better endfineness, also Planetary Micro Mill PULVERISETTE 7 premium line can be used for grinding. |
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Planetary Mono Mill PULVERISETTE 6 classic linemain disk speed: 650 rpm |
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Equipment: |
80 ml grinding bowl made of zirconium oxide (ZrO2) +110g of 1 mm Ø ZrO2 grinding balls |
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5 g | |
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<30 µm | |
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+ 30ml water | |
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120 min | |
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d50<0,5 µm | |
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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). |