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I have been looking for the phase diagram of alumina or Aluminium oxide, could it be that there is not something like that?

thank you

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There is really not much to it. Basically you have a metal and an oxide phase, and never the twain shall mix significantly even after melting the oxide above 2000°C [1]. The suboxide that is sometimes mentioned, $\ce{Al2O}$, is not indicated here.

enter image description here From Ref. 1

Reference

1. S. Das, "The Al-O-Ti System", J. Phase Equilibria 23(6) (2002), 525-536.

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    $\begingroup$ thank you so much $\endgroup$ – Santiago Celis Patiño Jul 9 at 21:13
  • $\begingroup$ sciencedirect.com/science/article/pii/… is another reference - it also shows no other binary phases, although it does show an ionic liquid of Al2O3 composition with a miscibility gap to the Al liquid. $\endgroup$ – Jon Custer Jul 9 at 21:50
  • $\begingroup$ This diagram shows the ionic liquid as well, its saturation line is the short segment on the upper right. $\endgroup$ – Oscar Lanzi Jul 9 at 22:09

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