Effect of mechanical activation on phase transformations in transition aluminas

摘要

The influence of mechanical activation (MA) on γ- and χ-Al_2O_3 is studied by means of X-ray phase analysis. The change of specific surface of aluminium oxides after MA is estimated. It is shown that the mechanical treatment leads to the change of the sequence of solid-phase transitions in aluminium oxide and a decrease of α-Al_2O_3 formation temperature.