I am looking for ways to produce powder from an aluminum bar. I can't find an available grinder/mill, so I am looking for an alternative. I saw a method wherein a steel plate and a steel bar were used to produce the powder. However, I am worried that this method will introduce contaminants in the final product. More so, the method is quite tedious.

Here is a link of the said method.

http://m.instructables.com/id/How-to-make-super-fine-powdered-magnesium-or-alumi/

Thank you!

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