I need to make aluminum powder that is fine! I don't have a mill to use or something like that. If I fill literally the whole coffee blender, will that get it fine? I want to make an ok amount of it. I tried to use sand paper which makes it as fine as I want it but takes a while of sanding.
Trying to make flash powder? Be careful! Use a belt sander or a circular saw with a grinding blade on it.
How to make fine aluminum powder?
How To Make Aluminum Powder
Dissolve it with an acid--vinegar's your best bet there unless you've got a way to get a hold of a stronger acid that'll do this quicker. Once all the aluminum's dissolved, put in some magnesium like you can get from one of those fire starting tools that's just a brick of magnesium with a spark strip on it. The magnesium will ionize and the aluminum will precipitate out of the solution. Add the magnesium in as small of individual quantities as you can, too, to keep the size of individual precipitate particles down. Also, I recommend neutralizing the acid before adding the magnesium in case there's any acidity left--baking soda will work fine and doesn't stink like ammonia. If the solution's too acidic when you add the magnesium, the magnesium will go for the acid instead of the aluminum.
