Steamboy
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Make aluminium powder of 60~30 µm
I need make aluminium powder, however, produce it using common sandpaper in aluminium foil, although effective, is slow and impractical.
Also, produced aluminium powder has a pinky-gray colour due to impurities (pink for the colorant of sandspaper), ie, aluminium can tear to common
sandpaper.
Also, I don't have coffee grinder nor other machine for create it.
What type of sandpaper can I use?
Is there better alternatives that doesn't implies the use of machines?
[Edited on 26-1-2017 by Steamboy]
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Jstuyfzand
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A ball mill, closer to machineless is not going to happen.
If there is an alternative, I'd love to hear about it.
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Chlorine
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Your best option is to buy or make a ball mill. Machined aluminum turnings work wonders because they're dirt cheap and brittle. I've tried using foil
in a ball mill and it was a disaster.
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Morgan
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Maybe by heating a roll of aluminum foil and then quenching it, it would become less ductile or embrittled enough to use.
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gatosgr
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You can also evaporate aluminum in vacuum and then quench it.
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Meltonium
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A nice, coarse file might work well instead of sandpaper. Although, it may be prone to clogging since aluminium is very soft.
"If at first you don't succeed, fail, fail again."
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