О-53 Олейникова, В. А. Расчет взаимодействия хлоридов титана и железа с гафнием в расплавленных хлоридах кальция и бария [] = Calculation of the interaction of titanium and iron chlorides with hafnium in molten calcium and barium chlorides / В. А. Олейникова, Н. А. Логинов, Т. А. Пузанова // Расплавы. - 2003. - N 6. - С. 58-62. : табл. - Библиогр.: с. 57 (12 назв.) . - ISSN 0235-0106 Рубрики: ХИМИЧЕСКИЕ НАУКИ Кл.слова (ненормированные): Ti -- ТИТАН -- TiCl2 -- TiCl3 -- ХЛОРИД ТИТАНА -- Fe -- FeCl2 -- FeCl -- ХЛОРИД ЖЕЛЕЗА -- ХЛОРИДЫ РАСПЛАВЛЕННЫЕ -- РАСПЛАВЛЕННЫЕ ХЛОРИДЫ -- CaCl2 -- ХЛОРИД КАЛЬЦИЯ -- BaCl2 -- ХЛОРИД БАРИЯ -- Hf -- ГАФНИЙ Аннотация: С использованием литературных данных рассчитаны температурные зависимости условных констант равновесия процессов взаимодействия TiCl2, TiCl3, FeCl и FeCl2 с гафнием в расплавах CaCl2 и BaCl2 |
I-70 Investigation of the protonic conduction in Sm doped BaCeO3 [Текст] / E. Gorbova, V. Maragou, D. Medvedev, A. Demin, P. Tsiakaras // Journal of Power Sources. - 2008. - Vol. 181, № 2. - С. 207-213 : рис. - Библиогр.: p. 212-213 ( 59 ref. ) . - ISSN 0378-7753 Рубрики: ХИМИЧЕСКИЕ НАУКИ Кл.слова (ненормированные): SAMARIUM DOPED BARIUM CERATES -- PROTONIC CONDUCTORS -- ELECTRICAL CONDUCTIVITY -- PEROVSKITE |
I-60 Influence of Cu on the properties of gadolinium-doped barium cerate [Текст] / E. Gorbova, V. Maragou, D. Medvedev, A. Demin, P. Tsiakaras // Journal of Power Sources. - 2008. - Vol. 181, № 2. - С. 292-296 : рис. - Библиогр.: p. 296 (26 ref.) . - ISSN 0378-7753 Рубрики: ХИМИЧЕСКИЕ НАУКИ Кл.слова (ненормированные): GADOLINIUM-DOPED BARIUM CERATES -- COPPER ADDITIVES -- ELECTRICAL CONDUCTIVITY |
T 44 Термическое расширение протонных твердых электролитов на основе BaCeO3 [Text] = Thermal-expansion of BaCeO3-based solid electrolytes with proton conductivity / В. П. Горелов, Н. В. Арестова, Э. Х. Курумчин, Г. К. Вдовин // Неорганические материалы. - 1995. - Т. 31, N 3. - С. 370-372. - Библиогр.: с. 372 (9 назв.) . - ISSN 0002-337X Рубрики: ХИМИЧЕСКИЕ НАУКИ Кл.слова (ненормированные): BaCeO3 -- Ba -- Ce -- BARIUM -- ЦЕРАТ БАРИЯ -- ПРОТОННАЯ ПРОВОДИМОСТЬ |
I-70 Investigation of the structural and electrical properties of Co-doped BaCe0.9Gd0.1O3 - дельта [] / D. Medvedev, V. Maragou, T. Zhuravleva, A. Demin, E. Gorbova, P. Tsiakaras // Solid State Ionics. - 2011. - Vol. 182, № 1. - С. 41-46. - Bibliogr. : p. 45-46 (43 ref.) . - ISSN 0167-2738 Рубрики: ХИМИЧЕСКИЕ НАУКИ Кл.слова (ненормированные): ОКСИД КОБАЛЬТА -- ЦЕРАТ БАРИЯ -- ПРОТОННЫЕ ПРОВОДНИКИ -- ДОПИРОВАНИЕ Аннотация: In the present work the effect of cobalt oxide addition on the density and on the electrical properties of gadolinium-doped barium cerate is investigated. A series of BaCe0.9 б xGd0.1CoxO3 б б (x = 0.00, 0.01, 0.03, 0.05, 0.07, 0.10) samples were prepared according to the conventional solid state reaction synthesis technique. The experimental results indicated that the addition of cobalt oxide leads to the improvement of the sintering properties and the enhancement of the grain dimensions. It was found that the investigated complex oxides crystallize at cubic singony. Moreover, according to the X-ray diffraction (XRD) and the scanning electron microscopy (SEM) analyses, the prepared samples are single-phase in the range of 0.00 x б 0.10, while at compositions of x б 0.03 there is almost no open porosity. According to the four-probe dc electrical conductivity measurements, the conductivity of the BaCe0.9 б xGd0.1CoxO3 б б samples is inferior to the undoped ones (BaCe0.9Gd0.1O3 б б—BCG) in wet air atmosphere. However, the presence of Co in the range of 0.03 б x б 0.10 at higher temperatures (800–900 °C) has smaller impact on the electrical conductivity values. Finally, in wet hydrogen atmosphere the electrical conductivity values of the 1 mol% Co-doped sample were found to be close enough to the ones of the undoped sample, leading to the conclusion that cobalt can be effectively employed as a sintering additive of gadolinium-doped barium cerates. \\\\Cserver\\dist\\НБО\\Cтатьи БД ИВТЭ\\Solid State Ionics\\SSI2011 V.182, N 1. - P.41-46.pdf |
C 94 Cu(+) and Cu(2+) diffusion coefficients in low-melting alkali halide mixtures / M. Ananyev, D. Medvedev, A. Gavrilyuk, S. Mitri, A. Demin, V. Malkov, P. Tsiakaras // Electrochimica Acta . - 2014. - Vol. 125. - P .371-378. Рубрики: ХИМИЧЕСКИЕ НАУКИ Кл.слова (ненормированные): ОКСИД МЕДИ -- ПРОВОДИМОСТЬ -- ЦЕРАТ БАРИЯ -- ПРОТОННАЯ ПРОВОДИМОСТЬ Аннотация: Segmentation algorithms for the quantitative description of the surface microstructure and the evaluation of the grain-boundary conductivity of ceramic materials surface using SEM microphotographs analysis was developed and applied in the present work for first time in barium cerate based solid solutions. To this purpose novel polycrystalline ceramic materials based on Cu and Gd co-doped BaCeO3 proton conductors exhibiting high proton conductivity have been prepared and characterized. The influence of copper oxide as a dopant on the microstructure and the electrical properties of BaCe0.9–xGd0.1CuxO3–δ (0≤x≤0.1) have been examined in detail. It is shown that the dependence of the electrical conductivity is correlated with the average oxide grain diameter variation in air at various temperatures. Moreover, it was found that the algorithmic segmentation evaluation results are in good agreement with the experimental ones, verifying the considerable contribution of the grain-boundary conductivity to the electrical transport of Cu and Gd co-doped BaCeO3 proton conductors. |
C 94 Cu and Gd co-doped BaCeO3 proton conductors: Experimental vs SEM image algorithmic-segmentation results / M. Ananyev, D. Medvedev, A. Gavrilyuk, S. Mitri, A. Demin, V. Malkov, P. Tsiakaras // Electrochimica Acta. - 2014. - Vol. 125. - P371-379. Рубрики: ХИМИЧЕСКИЕ НАУКИ Кл.слова (ненормированные): ЭЛЕКТРОПРОВОДНОСТЬ -- ЦЕРАТ БАРИЯ -- ТВЕРДЫЕ РАСТВОРЫ -- ОКСИД МЕДИ -- ПРОВОДИМОСТЬ Аннотация: Segmentation algorithms for the quantitative description of the surface microstructure and the evaluation of the grain-boundary conductivity of ceramic materials surface using SEM microphotographs analysis was developed and applied in the present work for first time in barium cerate based solid solutions. To this purpose novel polycrystalline ceramic materials based on Cu and Gd co-doped BaCeO3 proton conductors exhibiting high proton conductivity have been prepared and characterized. The influence of copper oxide as a dopant on the microstructure and the electrical properties of BaCe0.9–xGd0.1CuxO3–δ (0≤x≤0.1) have been examined in detail. It is shown that the dependence of the electrical conductivity is correlated with the average oxide grain diameter variation in air at various temperatures. Moreover, it was found that the algorithmic segmentation evaluation results are in good agreement with the experimental ones, verifying the considerable contribution of the grain-boundary conductivity to the electrical transport of Cu and Gd co-doped BaCeO3 proton conductors. |