Reformation of phase composition in decomposed aluminium titanate

The ability of decomposed Al2TiO5 to undergo reformation in phase composition has been characterised by neutron diffraction at elevated temperature and verified by differential thermal analysis. It is shown that the process of phase decomposition in metastable Al2TiO5 is reversible and that reformation occurs readily when decomposed Al2TiO5 is re-heated above 1300 °C. Subsequent decomposition of reformed Al2TiO5 during cooling below ∼1200 °C is governed by the temperature-dependent atomic diffusion rates.