6.4 Factors with an impact on grinding
6.4.1 Running time (grinding duration)
To reduce the grinding time, you can use a grinding bowl and grinding
balls with a higher density, and thus a higher impact energy.
6.4.2 Speed
Higher speeds shorten the grinding time and increase the percentage of
fine particles.
Lower speeds increase the grinding time and lower the temperature,
which can lead to fewer pauses. This means that the overall working time
may remain the same. The wear is increased in this case though.
Fritsch recommends however to use the maximum
speed and to plan for enough pauses so that the wear is
minimised.
For thermally sensitive materials, the optimal rotational
speed needs to be determined through experimenta-
tion.
6.4.3 Reverse mode
n
Useful for mechanical alloying
n
Improvement of the homogeneity of the sample
Using the device
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