Вид документа : Статья из журнала Шифр издания : 54/T 44 Автор(ы) : Pikalova E. Yu., Demina A. N., Demin A. K., Maragou V. I., Tsiakaras P. E. Заглавие : The effect of co-dopant addition on the properties of LN0.2CE0.8O2-δ (LN = GD, SM, LA) solid-state electrolyte Место публикации : Journal of Power Sources. - 2008. - Vol. 181, № 2. - С. 199-206. УДК : 54 Предметные рубрики: ХИМИЧЕСКИЕ НАУКИ Ключевые слова (''Своб.индексиров.''): электропроводность--щелочноземельные металлы--легирование Аннотация: The present work aims at the investigation of Ln0.2Ce0.8O2−δ (where Ln = Sm, La, Gd) structural and electrical properties when in the Ln sub-lattice, Ba2+ and Sr2+ with ionic radii 1.42 and 1.26 Å, respectively, are introduced. The conductivity measurements were held both in air and in H2 + 3%H2O atmosphere using the 4-probe dc technique at the temperature range of 600–900 °C. Among all the samples, the highest value of electrical conductivity is obtained in the case of (Sm0.75Sr0.2Ba0.05)0.2Ce0.8O2−δ, both in air and in hydrogen atmosphere. In the case of H2 + 3%H2O the conductivity of the co-doped compounds increases in comparison with air. Moreover, the dependence of conductivity on the oxygen partial pressure, measured at the range of 0.21–10−22 atm, showed that the electrolytic area of alkaline-earth metals doped Ln0.2Ce0.8O2−δ is considerably enhanced, as predicted by the theory. Finally, by comparing the thermal expansion coefficients of the different materials (TEC), the thermo-mechanical compatibility between the co-doped and the other cell components was also investigated. Доп.точки доступа: Pikalova , E. Yu.; Demina , A. N.; Demin , A. K.; Maragou , V. I.; Tsiakaras, P. E.