A new anionic conductive vitreous phase based on bismuth, lead, cadmium, oxygen and fluorine: electrical properties and structural study of the recrystallized phase

Investigations in the Bi2O3-CdO-PbF2 system using silica tubes as synthesis containers indicate the existence of a large vitreous domain. Structural d etermination, using powder diffraction and Rietveld methods, has shown that the recrystallized phase is isotypic to the trigonal phase belonging to th e Bi2O3-PbO-PbF2 system. Raman studies evidence boson and large peaks, typi cal of a vitreous phase containing lead in its formulation. Conductivity me asurements display sigma values close to 10(-3) S cm(-1) at 250 degrees C w ith an activation energy of 0.6 eV. These values are among the best obtaine d for an anionic conductive glass.