Rapidly Quenched Tungstate and Molybdate Composition Containing Lithium: Glass Formation and Ionic Conductivity

Extended glass‐forming regions were found by twin‐roller quenching in the systems of with and/or . The crystallization of the glasses was studied by DTA and x‐ray analysis; a new metastable crystalline phase was observed for . The glasses exhibited lithium ion conductivities in the 10−5–10−6 (Ω‐cm)−1 range at room temperature which were in all cases much greater than the conductivity of the polycrystalline phases after crystallization. The corresponding Li+ diffusion coefficients in the low lithium content tungstates in the glassy and crystallized phases are comparable to the values reported for the grain boundaries and grains of fine grained polycrystalline electrochromic films.