Affiliation:
1. Institute of High Temperature Electrochemistry, Ural Branch of the Russian Academy of Sciences
Abstract
Glass-ceramic samples of the Li1.5+ x Al0.5Ge1.5Si x P3- x O12 system ( x = 0-0.1) were obtained by directional crystallization of glasses. The glass transition, onset and peak temperatures of crystallization were determined using differential scanning calorimetry. The phase composition of glass-ceramics was determined by X-ray phase analysis. Electrical conductivity is studied using electrochemical impedance. Based on the data obtained, the homogeneity region of solid solutions was established and the optimal conditions for producing SiO2-doped glass-ceramics were identified. The composition with x = 0.02, crystallized at 750°C with a heating rate of 3 deg/min for 2 h, had the highest lithium-ion conductivity at room temperature (4.55×10-4 S/cm).
Publisher
The Russian Academy of Sciences