Structural and dielectric studies of MgAl2O4–TiO2 composites for energy storage applications. Issue 21 (1st November 2021) - Ullah, Farman
Abstract: Nanostructured MgAl2 O4 and TiO2 were successfully synthesized in phase pure form using well know co-precipitation method. The composites of MgAl2 O4 with various concentrations of TiO2 (5 %, 10 %, 20 %, and 50 %) were prepared by vertexing technique. The pure crystal phase of both TiO2 and MgAl2 O4 have hexagonal and spinel crystal structures, respectively as confirmed from x-rays diffraction analysis. The sheet-like morphology with some agglomeration was shown for pure MgAl2 O4 and spherical for TiO2 with clear boundaries are obtained from FESEM micrographs. Energy dispersive x-rays confirmed the presence of expected elements in corresponding percentages in all compositions. These compositions present enhanced ferroelectric and dielectric responses in synthesized composite materials. The improvement in saturation polarization P s, electric-remanence polarization P r, and the electric-coercivity E c parameters confirm that these can be used as a good dielectric medium and can consider highly efficient material for energy storage device applications.