I have read that ball milling is a procedure which is usually used for nano material synthesis without the aid of solvents. At the same time, i have found some literature regarding synthesis of 2D materials by ball milling in which they have used ethanol as solvent.
The synthesis with a liquid media is refered as wet grinding. It is believed to be more efficient to get smaller particles as the liquid helps to lower the surface energy of the particles.
You can find more about it here: Article Mechanical Alloying and Milling
Dry milling also generate lot of friction, which cause the degradation of vessel's inner wall and also the surface of balls, thus the chances of contamination are high.
During milling welding, fracturing and rewelding of the partciles are done.By this process new surfaces are exposed which are prone to get oxidised. hence we use innert atmosphere during milling.
Yes, any solution which is non reactive to your powder and jar (and balls) can be used. People often used ethanol, Toluene and acetone.
Yes ethanol will work. It is also possible to use a solid as control process agent such as stearic acid.
It is more better to use the toluene as a solvent for wet ball milling. As per the literature it more efficient to get smaller particles as well as homogeneity as the solvent in wet ball milling helps to lower the surface energy of the particles. @ Arya J S
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