Foeskes
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Chromium from thermite
I recently made chromium from thermite.
The recipe I used was 20 grams Cr2O3:12 grams K2Cr2O7:11.4 grams Aluminium powder.
The mixture was ignited using some magnesium ribbon and a mixture of aluminium and sulfur.
After breaking the slag I got around 12 grams of chromium(~67% yield based on Cr2O3 and K2Cr2O7) although it likely contains Al contamination like
most thermite reactions.
(The remaining slag and the thermite container was put in a ascorbic acid solution to destroy any Cr(VI) )
[Edited on 23-9-2017 by Foeskes]
[Edited on 23-9-2017 by Foeskes]
[Edited on 23-9-2017 by Foeskes]
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j_sum1
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Rather nice.
I would love to see a cut or ground surface to see if you get the characteristic shiny that Cr exhibits.
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Foeskes
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When breaking the slag the were small beads of chromium and after breaking one, it was pretty shiny. It looks kinda similar to the attached image, but
smaller.
[Edited on 23-9-2017 by Foeskes]
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![[*]](images/xpblue/default_icon.gif){kind=icon}
