Mixed conduction of glasses in the Li2O-B2O3-WO3 system
The glass-forming region in the Li2O-B2O3-WO3 system was determined. The total conductivities and the electronic conductivities were measured. The Raman and ESR spectra were studied. The influence of WO3 content on the electronic and ionic conductivities are discussed based on the W5+-W6+ electron charge transfer and the nature of the negative sites for Li+ ions, respectively.