Thermal behavior and physicochemical studies of phase transitions before the decomposition in the selenate–tellurate protonic conductor material

Abstract

Highlights: Thermal analysis shows two phase transitions at 320 and 490K before the decomposition. The high temperature structural study and the deconvolutions of Raman spectra prove that the transition at 320K is a structural phase transition. The dielectric study shows that this material has a ionic protonic conduction phase transition in the range of T = 490K.