Вид документа : Статья из журнала Шифр издания : 54/S 98 Автор(ы) : Pikalova E. Yu., Marago V. I., Demin A. K., Murashkina A. A., Tsiakaras P. E. Заглавие : Synthesis and electrophysical properties of (1 - x)Ce0.8Gd0.2O2 дельта + xTiO2 (x = 0–0.06) solid-state solutions Место публикации : Solid State Ionics. - 2008. - Vol. 179, № 27-32. - С. 1557-1561.: рис. Примечания : Библиогр.: с. 1561 (12 ref.) ББК : 54 Предметные рубрики: ХИМИЧЕСКИЕ НАУКИ Аннотация: In the present work the electrical properties of (1 ? x)Ce0.8Gd0.2O2 ? ? + xTiO2 (x = 0–0.06) synthesized by the standard ceramic technology were investigated, in a wide range of oxygen partial pressures (0.21–10? 20atm at 900 °C) and temperatures (600–900 °C), both in air and H2 + 3%H2O atmosphere. It was found, that only the introduction of above 1 mol% TiO2 decreases the sintering temperature of Ce0.8Gd0.2O2 ? ?. The values of total electrical conductivity do not change significantly with the content of the sintering aid up to 3 mol%, while the activation energy of total conductivity in air decreases considerably with the introduction of TiO2 into Ce0.8Gd0.2O2 ? ? from 87 to 67 kJ/mol; however, it is independent of x up to 0.03. The dependence of the total conductivity on the oxygen partial pressure is characterized by three regions. In the intermediate region (10? 10–10? 14) the conductivity behavior is described according to the oxygen vacancy model. The n-type conductivity region curve of Ce0.8Gd0.2O2 ? ? is fitted to a -1/5 slope. The increase of TiO2 content leads to the slope increase at ? 1/6, ? 1/8 and ? 1/9 for 1, 2 and 3 mol% TiO2, respectively, due to the trapping of electrons by Ti4+. 1 mol% doping increases the electrolytic region of Ce0.8Gd0.2O2 ? ? from 10? 10 to 10? 13atm. Finally, the optimal content of TiO2 from the viewpoint of sintering and electrical properties was found to be 2 mol%.???? Держатели документа: Центральная научная библиотека УрО РАН Доп.точки доступа: Pikalova, E. Yu.; Marago, V. I.; Demin, A. K.; Murashkina, A. A.; Tsiakaras, P. E.