# Aluminium oxide phase diagram

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

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.