SOLID ELECTROLYTES BASED ON TETRAGONAL ZIRCONIUM DIOXIDE IN ZRO2-DY2O3 AND ZRO2-HO2O3 SYSTEMS

Solid oxygen-conducting electrolytes based on the tetragonal modificat ion of zirconium dioxide in ZrO2-Dy2O3 and ZrO2-Ho2O3 systems are synt hesized and investigated. Tetragonal solid solutions are found to exis t in these systems in the regions with a R(2)O(3) content of 2.5-4 mol %. At low temperatures, electroconductivity is weakly dependent on the composition. At high temperatures (about 800 degrees C and above), th e conductivity increases with the growing R(2)O(3) content. The activa tion energy of conduction is diminished in the system containing dyspr osium. This implies a higher mobility of oxygen vacancies in these ele ctrolytes.