Preparation and Characterization of New Oxyfluoride Phases (Ba,Na)(Ti,Mg)(O,F)

Abstract

Oxyfluoride phases have been synthesized in free atmosphere, using the initially synthesized perovskite BaTiO3 and the fluorides NaF and MgF2. The purity of BaTiO3 and oxyfluorides has been checked by X–Ray diffraction (XRD).The microstructures of these phases are observed by scanning electron microscopy. The phase transitions have been investigated by dielectric measurements and differential scanning calorimetry (DSC).

Synthesis and Characterization of (1-x)BaTiO3-xBaF2-xLiF Ceramics

“…Table 1 gives the lattice parameters and the volume cell of Ba)(Ti,Li)(O,F) 3 phases. The ceramics are more densified that those obtained in the BaTiO 3 -MgF 2 -NaF system [9]. The shrinkage coefficients increase weakly with the rate of the fluorides BaF 2 + LiF (Fig.…”