Li 2O-Al 2O 3-TiO 2-P 2O 5 (LATP) glass was fabricated by conventional melt quenching route. Glass transition temperature (T g=296 °C) and crystallization temperatures (T C1,2) were obtained from thermal analysis. LATP glass was converted to glass-ceramic by heat treatment in the range 550-950 °C for 6 h. X-ray diffraction analysis revealed LiTi 2(PO 4) 3 as a major phase. Ionic conductivity increased monotonically with concentration, reaching a maximum of ∼10 -4 S/cm. AlPO 4 phase was detected in samples heat-treated above 850 °C. Its presence decreased the conductivity, suggesting LiTi 2(PO 4) 3 phase as main contributor to high ionic conductivity. NMR spectra confirmed the presence of mobile 7Li ions in the entire sample series and also gave some information on the structure and dynamics of conductivity.
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