Aluminium oxide

Sample starts sticking lightly, a change of balls and a further grinding in suspension is required (see result 2).

For a grinding of higher amounts, also 500ml bowls can be used (e.g. with Planetary Mill PULVERISETTE 5 classic line and 4 bowl fasteners).

After pre grinding in result 1, balls have been changed to 1mm Ø and the proper amount of water has been added to achieve motor oil like viscosity for best grinding result.

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.

After 2 hours of grinding, fineness has been checked with our Laser Particle Sizer ANALYSETTE 22 NanoTec. Desired fineness has already been reached.