OXYGEN NONSTOICHIOMETRY AND ELECTROREDUCTION OF LA0.7SR0.3COO3-DELTA

Results were reported which were obtained when measuring the oxygen st oichiometry (by coulometric titration) and conductivity (by a dc four- probe technique) of La0.7Sr0.3CoO3-delta. The features of the temperat ure dependence of resistance at different oxygen contents were reporte d. A step in the coulometric titration curves was described which prob ably is due to a chemical transformation of the nonstoichiometric comp ound. Data concerning the influence of independent constituent phases of the oxide compound (the oxides of Co, La, and Sr) were discussed.