Preparation, Characterization and Conductivity Studies of Li<sub>1.3</sub>M<sub>0.3</sub>Ti<sub>1.7</sub>(PO<sub>4</sub>)<sub>3</sub> (M = Al, Cr and Fe) Glass–Ceramics

Nasicon type compounds of general formula Li1..3M0.3Ti1.7 (PO4)3 (M = Al, Cr, Fe) were prepared using melt quenching method. The samples were characterized by X-ray powder diffraction and infrared spectra. Thermal stability against crystallization was evaluated by DSC curve. All the compounds crystallize in hexagonal lattice with R-3c space group. The IR spectra show the characteristic PO4 vibrations. DSC curve reveals that the Li1.3Fe0.3Ti1.7(PO4)3 glass-ceramics possesses the better thermal stability against crystallization. Conductivity studies indicate that the total conductivity is dominated by the grain boundary