IONIC ELECTRONIC CHARGE-TRANSPORT IN COPPER MOLYBDATE GLASSES PREPARED UNDER DIFFERENT CONDITIONS/

Copper glasses (CuI + Cu2O + MoO3) have been prepared by in-situ quenc hing of mixtures molten (i) in air (ii) under N-2 being continuously f lushed, (iii) in static vacuum with initial pressure of 10(-6) Torr an d (iv) in vacuum being continuously pumped. The samples prepared under different conditions had different ionic/electronic transference numb er. The electronic part of conductivity has been explained in terms of Mo6+-->Mo5+ and Cu(+)reversible arrow Cu++ conversion. The presence o f Cu++ and Mo5+ has been established by ESR studies.