Summary: | Different amounts of Li3PO4 were mixed to a fixed ratio of LiI:Li2WO4, ground and pelletised before subjected to sintering at 70°C for 7 days. XRD shows that the product formed after sintering process is most likely Li6P4W 8O32 due to peaks present at 10.6°, 22.4°, 24.0°, 24.4, 26.2°, 32.4° and 34.0°. Conductivity studies show that the sample with 25 wt.% Li3PO4 exhibits the highest room temperature conductivity of 3.42 × 10-3 Scm-1. Conductivity is expected to occur through channel-like structures which could have formed due to corner or edge sharing of polyhedra. FTIR studies have shown the existence of WO4 tetrahedra and WO6 octahedral at 850 cm-1 and 952 cm-1, and phosphate tetrahedral at 564 cm-1, 700 cm-1, 890 cm-1 and 1030 cm -1.
|