Figure 6.

(a) XRD patterns showing development α‐Al₂O₃ phase from boehmite by dehydration induced during ball milling, (b) surface area and hydrodynamic diameter of versus milling time, and (c) free energy change as a function of surface area for the standard state (T=25 °C, P=1 bar) and considering effects of milling impact and hydroxylation. Adapted with permission from ref. [42], Copyright 2019 The Authors. Symbols in (a) indicate crystalline phases: γ, γ‐Al₂O₃; α, α‐Al₂O₃; b, γ‐AlOOH (boehmite); d, α‐AlOOH (diaspore).