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Author: Subject: Make aluminium powder of 60~30 µm
Steamboy
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[*] posted on 26-1-2017 at 09:44
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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[*] posted on 26-1-2017 at 12:57


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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[*] posted on 27-1-2017 at 02:50


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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[*] posted on 27-1-2017 at 06:03


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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[*] posted on 27-1-2017 at 12:53


You can also evaporate aluminum in vacuum and then quench it.



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Meltonium
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[*] posted on 27-1-2017 at 13:23


A nice, coarse file might work well instead of sandpaper. Although, it may be prone to clogging since aluminium is very soft.



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