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Magnet Experiments

We've been playing with the differences between Fe3O4(Iron(II,III) oxide or magnetite) and Fe2O3(Iron(III) Oxide)

Fe3O4 + tri-flow = ferrofluid:

We mixed in some epoxy, and let it dry.

  • This is what resulted: Image
  • So, you can get semi-permanent ferrofluid sculptures. They're just a bit fragile.
    • Update: It broke and made a mess.

Fe2O3 + silly putty

  • Not magnetic.

Fe3O4 + silly putty