Influence of processing conditions on the formation of Y2Ti 2O7 and YTiO3 phases

Abstract

In the present study, the mechanisms for transformation of pyrochlore to perovskite phase (YTiO3), keeping the same initial ingredients and amount of Y2O3 and TiO2, are proposed. The formation of both the phases is correlated using X-ray diffraction (XRD) and thermogravimetric analysis (TGA). The microstructure of the sample was examined by scanning electron microscope (SEM). Energy dispersive X-ray spectroscopic (EDX) analysis was carried out to check the stoichiometry of the sample. In addition to this, the morphological behaviour, particularly of YTiO3 phase, is studied so that the formation of both the phases can be correlated to understand the morphology dependent properties of the perovskites and pyrochlore structured materials. The results are discussed in light of disordering caused due to interface controlled growth and reduction of Ti using various characterization techniques.