Изотопный эффект H/D в проводимости CaZr-=SUB=-1-x-=/SUB=-Sc-=SUB=-x-=/SUB=-O-=SUB=-3-alpha-=/SUB=- в восстановительных атмосферах

Abstract

AbstractThe ionic (proton and deuteron) conductivity of the system CaZr_1 – _ x Sc_ x O_3 – α ( x = 0.03–0.20) is studied experimentally in H_2 + H_2O + N_2 and D_2 + D_2O + N_2 reducing atmospheres at p H_2O = p D_2O = 3.2 kPa and in the temperature range of 600–900°C. This system exhibits a considerable H/D isotopic effect in conductivity, and its magnitude is estimated. Using theoretical elaborations, we also estimate the magnitude of the thermodynamic isotope effect in the solubility of H_2O/D_2O in the considered system under reducing conditions.