Главная Новые поступления Описание Шлюз Z39.50

Базы данных


Труды сотрудников Института химии твердого тела УрО РАН - результаты поиска

Вид поиска

Область поиска
в найденном
 Найдено в других БД:Каталог книг и продолжающихся изданий (16)Сводный каталог иностранных периодических изданий, имеющихся в библиотеках УрО РАН (3)Нанотехнологии (4)Труды Института высокотемпературной электрохимии УрО РАН (50)Труды Института истории и археологии УрО РАН (1)Труды сотрудников Института горного дела УрО РАН (1)Труды сотрудников Института органического синтеза УрО РАН (9)Труды сотрудников Института теплофизики УрО РАН (36)Расплавы (21)Публикации Черешнева В.А. (1)
Формат представления найденных документов:
полныйинформационныйкраткий
Отсортировать найденные документы по:
авторузаглавиюгоду изданиятипу документа
Поисковый запрос: (<.>K=DIFFUSION<.>)
Общее количество найденных документов : 21
Показаны документы с 1 по 10
 1-10    11-21   21-21 
1.
Инвентарный номер: нет.
   


   
    63,65Cu NMR study of low-frequency spin dynamics in the infinite-layer antiferromagnetic compound SrCuO2 [Текст] / K. N. Mikhalev, S. O. Rebrin, A. P. Gerashenko, T. V. D'yachkova // JETP Letters (Translation of Pis'ma v Zhurnal Eksperimental'noi i Teoreticheskoi Fiziki). - 2004. - Vol. 80, № 8. - С. 540-543. - Библиогр. : с. 543 (15 назв.)
ББК 54
Рубрики: ХИМИЧЕСКИЕ НАУКИ
Кл.слова (ненормированные):
АНТИФЕРРОМАГНЕТИКИ -- ЯМР -- МЕДЬ
Аннотация: The spin–lattice and spin–spin relaxation times have been measured for 63,65Cu NMR in the infinite-layer antiferromagnet SrCuO2 in the ordered state for temperatures from 4.2 to 361 K. In the region of low temperatures (T£ 250 K), both relaxation processes are of the same nature and the main contribution to the relaxation rate is associated with the diffusion of a small number of holes with an activation energy of ~42 meV. In the hightemperature range (T > 250 K), contributions to the transverse relaxation rate exhibit redistribution and this relaxation process is determined predominantly by indirect interactions

Найти похожие

2.
Инвентарный номер: нет.
   
   D 30


   
    Defects in beryllium ceramics / V. S. Kiiko, L. V. Zolotukhina, E. V. Zabolotskaya, I. A. Dmitriev, Yu. N. Makurin // Glass and Ceramics . - 1999. - Vol. 56, № 11-12. - С. 346-349 : il. - Bibliogr. : p. 349 (12 reF.)
ББК 54
Рубрики: ХИМИЧЕСКИЕ НАУКИ
Кл.слова (ненормированные):
ДЕФЕКТЫ -- КЕРАМИКА БЕРИЛЛИЕВАЯ
Аннотация: Point defects and possible reasons for defect formation in beryllium ceramics with B 3÷, AI 3+, Zn 2+, Li +, and rare-earth element impurities produced by slip casting, dry-press molding, and high-temperature compression are investigated using electron paramagnetic resonance. A certain number of impurity centers are identified which determine the optical, luminescent, diffusion, and other physicochemical properties of beryllium ceramics

Полный текст
Найти похожие

3.
Инвентарный номер: нет.
   
   H 99


   
    Intercalation thermodynamics and chemical diffusion of oxygen in the solid solution YBa2Cu3-xCoxO6+delta [] / E. B. Mitberg, M. V. Patrakeev, A. A. Lakhtin, I. A. Leonidov, V. L. Kozhevnikov, K. R. Poeppelmeier // Solid State Ionics. - 1999. - V. 120, N 1-4. - С. 239-249. - Bibliogr.: 51 ref. . - ISSN 0167-2738
ББК 54
Рубрики: ХИМИЧЕСКИЕ НАУКИ
Кл.слова (ненормированные):
ДИФФУЗИЯ КИСЛОРОДНАЯ -- КИСЛОРОДНАЯ ДИФФУЗИЯ -- КОЭФФИЦИЕНТЫ ДИФФУЗИИ -- КУПРАТЫ -- ИНТЕРКАЛЯЦИЯ -- ТЕРМОДИНАМИКА -- ДИФФУЗИЯ ХИМИЧЕСКАЯ -- ХИМИЧЕСКАЯ ДИФФУЗИЯ -- РАСТВОРЫ ТВЕРДЫЕ -- ТВЕРДЫЕ РАСТВОРЫ -- ДАВЛЕНИЕ КИСЛОРОДА -- КОБАЛЬТ -- ЭНТАЛЬПИЯ -- ЭНТРОПИЯ -- ТИТРОВАНИЕ КУЛОНОМЕТРИЧЕСКОЕ -- КУЛОНОМЕТРИЧЕСКОЕ ТИТРОВАНИЕ -- РЕЛАКСАЦИЯ ТЕРМОГРАВИМЕТРИЧЕСКАЯ -- ТЕРМОГРАВИМЕТРИЧЕСКАЯ РЕЛАКСАЦИЯ -- Co
Аннотация: The equilibrium oxygen content as a function of the temperature and oxygen pressure was measured for the solid solution YBa2Cu3-xCoxO6+delta, where x = 0, 0.2, 0.4, 0.6, 0.8, by using coulometric titration in the temperature range 600-850 C and oxygen pressures between 10(-5) and 1.0 atm. The change in the partial molar enthalpy and entropy of the intercalated oxygen was determined at different oxygen and cobalt contents. The oxygen chemical diffusion was studied by thermogravimetric relaxation in the oxygen-controlled atmosphere

Найти похожие

4.
Инвентарный номер: нет.
   
   L 96


   
    Luminescence of a transparent alumina ceramic doped with chromium and titanium / V. S. Kiiko, Yu. N. Makurin, A. A. Safronov, A. N. Enyashin, A. L. Ivanovskii // Refractories and Industrial Ceramics. - 2003. - Vol. 44, № 2. - P94-98 : il. - Bibliogr. : p. 98 (12 ref.)
ББК 54
Рубрики: ХИМИЧЕСКИЕ НАУКИ
Кл.слова (ненормированные):
ЛЮМИНЕСЦЕНЦИЯ -- ХРОМ -- ТИТАН -- КЕРАМИКА
Аннотация: Specimens of transparent alumina ceramic (TAC) are prepared by slip casting. An alumina spinel, formed during sintering under vacuum or under reducing conditions, as well as individual phases, produced by thermochemical doping with chromium and titanium, are identified. The spectra of steady-state x-ray luminescence (SXL) and pulsed cathodoluminescence (PCL) and the PCL decay kinetics are studied. The highest STL and PCL intensity were observed in specimens that were prepared by thermal diffusion using a carbon +TiO2 pack. Ti-doped TAC, characterized by a rapid decay of luminescence in the UV region, can be recommended as a promising material for the detector of a scintillation dosimeter. The luminescent chromium ions (isomorphic substituents of aluminum ions in the crystal lattice) are unsuitable for that purpose because of their long luminescence de-excitation time

Полный текст
Найти похожие

5.
Инвентарный номер: нет.
   
   M 45


   
    Mechanism of Oxidation of Powdered Metals During Heating in Air / V. G. Shevchenko, V. I. Kononenko, M. A. Bulatov, I. N. Latosh, I. A. Chupova // Combustion, Explosion, and Shock Waves. - 1998. - Vol. 34, № 1. - P. 40-43 : il. - Bibliogr. : p. 43 (19 ref.)
ББК 54
Рубрики: ХИМИЧЕСКИЕ НАУКИ
Кл.слова (ненормированные):
ОКИСЛЕНИЕ -- МЕТАЛЛЫ ПОРОШКОВЫЕ -- НАГРЕВАНИЕ -- ПОРОШКИ АЛЮМИНИЕВЫЕ
Аннотация: It is shown that the oxidation of alumln1~m- powders and rare-earth elements as the temperature rises is accompanied by cracking of a layer of interaction products at the particle surface. The intensity of cracking is reflected in the change of the specific powder surface during heating, and it depends on the phase formation in the barrier layer and its physicochemical properties. The real oxidation rate of disperse metals is higher than the diffusion rate in oxides, which indicates the determining role of cracking in the interaction mechanism

\\\\Expert2\\nbo\\Combustion, Explosion, and Shock Waves\\1998, V. 34, N 1, p. 40-43.pdf
Найти похожие

6.
Инвентарный номер: нет.
   
   O-66


   
    Optical Absorption and Nuclear Magnetic Resonance in Lithium Titanium Spinel Doped by Chromium / D. G. Kellerman, N. A. Mukhina, N. A. Zhuravlev, M. S. Valova, V. S. Gorshkov // Physics of the Solid State. - 2010. - Vol. 52, № 3. - P459-464 : il. - Bibliogr. : p. 463-464 (34 ref.)
ББК 54
Рубрики: ХИМИЧЕСКИЕ НАУКИ
Кл.слова (ненормированные):
ОПТИЧЕСКАЯ АБСОРБЦИЯ -- ЯМР -- ЯДЕРНЫЙ МАГНИТНЫЙ РЕЗОНАНС -- ТИТАНАТ ЛИТИЯ -- ШПИНЕЛИ -- ДОПИРОВАНИЕ -- ХРОМ
Аннотация: The optical absorption and nuclear magnetic resonance spectra of Li4 – xCr3xTi5 – 2xO12 (x = 0, 0.01, 0.02, 0.04) solid solutions have been investigated. It has been found that, in the Li4Ti5O12 spinel, lithium ions migrate from tetrahedral to octahedral positions with increasing temperature. Doping of chromium to the spinel favors an increase in the fraction of tetrahedrally coordinated lithium and hinders diffusion

Полный текст
Найти похожие

7.
Инвентарный номер: нет.
   
   O-97


   
    Oxygen Ionic and Electronic Transport in Apatite-Type Solid Electrolytes [] = Oxygen Ionic and Electronic Transport in Apatite-Type Solid Electrolytes / V. V. Kharton, A. L. Shaula, M. V. Patrakeev, J. C. Waerenborgh, D. P. Rojas, N. P. Vyshatko, E. V. Tsipis, A. A. Yaremchenko, F. M. B. Marques // Journal of the Electrochemical Society. - 2004. - V. 151, N 8. - С. A1236-A1246. - Библиогр.: с. A1246 (35 назв.) . - ISSN 0013-4651
ББК 54
Рубрики: ХИМИЧЕСКИЕ НАУКИ
Кл.слова (ненормированные):
КИСЛОРОД -- ИОНЫ -- ИОННЫЙ ПЕРЕНОС -- ЭЛЕКТРОЛИТЫ -- СТРУКТУРА ТИПА АПАТИТА -- ТВЕРДЫЕ ЭЛЕКТРОЛИТЫ -- ЭЛЕКТРОЛИТЫ ТВЕРДЫЕ -- ИОННАЯ ПРОВОДИМОСТЬ -- ПРОВОДИМОСТЬ ИОННАЯ -- ДОБАВКИ -- ИСТОЧНИКИ ТОКА -- ИОНЫ КИСЛОРОДА -- ЖЕЛЕЗО -- Fe
Аннотация: The oxygen ionic conductivity of apatite-type La9.83Si4.5Al1.5-yFeyO26 + - delta (y = 0-1.5), La10-xSi6-yFeyO26 + - delta (x = 0-0.77; y = 1-2), and La7-xSr3Si6O26 + - delta (x = 0-1) increases with increasing oxygen content. The ion transference numbers, determined by faradaic efficiency measurements at 973-1223 K in air, are close to unity for La9.83Si4.5Al1.5-yFeyO26 + - delta and La10Si5FeO26.5, and vary in the range 0.96-0.99 for other compositions. Doping of La9.83(Si, Al)6O26 with iron results in an increasing Fe4+ fraction, which was evaluated by Mossbauer spectroscopy and correlates with partial ionic and p-type electronic conductivities, whereas La-stoichiometric La10(Si, Fe)O26 + delta apatites stabilize the Fe3+ state. Among the studied materials, the highest ionic and electronic transport is observed for La10Si5FeO26.5, where oxygen interstitials are close neighbors of Si-site cations. Data on transference numbers, total conductivity, and Seebeck coefficient
as a function of the oxygen partial pressure confirm that the ionic conduction in Fe-substituted apatites remains dominant under solid oxide fuel cell operation conditions. However, reducing p (O2) leads to a drastic decrease in the ionic transport, presumably due to a transition from the prevailing interstitial to a vacancy diffusion mechanism, which is similar to the effect of acceptor doping. Iron additions improve the sinterability of silicate ceramics, increase the n-type electronic conductivity at low p(O2), and probably partly suppress the ionic conductivity drop. The thermal expansion coefficients of apatite solid electrolytes in air are (8.8-9.9)x10(-6) K(-1) at 300-1250 K

Найти похожие

8.
Инвентарный номер: нет.
   
   O-97


   
    Oxygen Nonstoichiometry and Ionic Conductivity of Sr3Fe2-xScxO7-delta / A. A. Markov, M. V. Patrakeev, V. V. Kharton, Y. V. Pivak, I. A. Leonidov, V. L. Kozhevnikov // Chemistry of Materials. - 2007. - v.19, № 16. - С. 3980-3987. - Bibliogr. : 30 ref.
ББК 54
Рубрики: ХИМИЧЕСКИЕ НАУКИ
Кл.слова (ненормированные):
НЕСТЕХИОМЕТРИЯ КИСЛОРОДНАЯ -- ПРОВОДИМОСТЬ ИОННАЯ -- СКАНДИЙ -- ЖЕЛЕЗО -- СТРОНЦИЙ
Аннотация: The substitution of scandium for iron in the Ruddlesden-Popper Sr3Fe2-xScxO7-delta (x=0-0.3) system increases tetragonal unit-cell volume and oxygen nonstoichiometry and decreases partial p- and n-type electronic conductivities studied in the oxygen partial pressure range from 1 x 10(-20) to 0.7 atm at 973-1223 K. The solubility of Sc(3+) corresponds to approximately x ~ 0.35. The relatively low, temperatureactivated hole mobility indicates a small-polaron mechanism of the electronic transport, as for undoped Sr3Fe2O7-delta. The atomistic computer simulations showed that major contribution to the ionic conductivity is provided by the oxygen sites surrounded by iron cations in the perovskite-type layers of Sr3(Fe,Sc)2O7-delta structure, whereas stable ScO6 octahedra are essentially excluded from the oxygen diffusion processes.??Minimum migration energy, 0.9-1.4 eV, was found for nonlinear pathways formed by the apical O1??sites linking iron-oxygen polyhedra along the c-axis and equatorial O3 positions in the perovskite-type??planes. The direct O3 f O3 jumps are characterized with higher energetic barrier, 1.5-2.2 eV. Because??of the increasing concentration of vacant O3 sites induced by scandium doping, the apparent activation energy for oxygen-ionic transport decreases from about 2 eV, as observed for undoped strontium ferrite at 1123-1223 K, down to 0.95-1.15 eV for Sr3Fe2-xScxO7-delta (x = 0.2-0.3). As a result, the partial ionic conductivity of Sr3Fe1.7Sc0.3O7-delta at temperatures below 1000 K becomes higher than that in Sr3Fe2O7-delta

Найти похожие

9.
Инвентарный номер: нет.
   
   P 56


   
    Phase Relations in the NaVO3-Ca(VO3)2 System / E. M. Gorbunova, B. V. Slobodin, T. I. Krasnenko, T. P. Sirina // Inorganic Materials. - 2004. - Vol. 40, № 4. - P. 407-410 : il. - Bibliogr. : p. 410 (6 ref.)
ББК 54
Рубрики: ХИМИЧЕСКИЕ НАУКИ
Кл.слова (ненормированные):
ФАЗОВЫЕ ДИАГРАММЫ -- ВАНАДАТ КАЛЬЦИЯ -- ВАНАДАТ НАТРИЯ
Аннотация: The phase diagram of the NaVO3–Ca(VO3)2 system is mapped out. The system is shown to contain NaVO3-based solid solutions (0–5 mol % Ca(VO3)2), Ca(VO3)2-based solid solutions (0–17 mol % NaVO3), and the double metavanadate Na2Ca(VO3)4. The results on the sequence of phase changes during heat treatment of an Na2CO3+ CaCO3+ 2V2O5mixture and on the direction of diffusion flows (studied by the Tubandt method) indicate that the phase formation in the NaVO3–Ca(VO3)2 system is mainly due to the diffusion of Na+ ions

Полный текст
Найти похожие

10.
Инвентарный номер: нет.
   
   P 93


   
    Properties of barium hexaferrite prepared by electric field assisted self-propagating high-temperature synthesis [Text] / S. M. Busurin, Yu. G. Morozov, M. V. Kuznetsov, M. L. Chernega, A. A. Chobko // Inorganic Materials. - 2006. - Vol. 42, № 12. - P1374-1378 : il. - Библиогр. : с. 1377 (16 назв.)
ББК 54
Рубрики: ХИМИЧЕСКИЕ НАУКИ
Кл.слова (ненормированные):
ГЕКСАФЕРРИТ БАРИЯ -- СИНТЕЗ ВЫСОКОТЕМПЕРАТУРНЫЙ -- СВОЙСТВА МАГНИТНЫЕ -- ПОРОШКИ
Аннотация: We have prepared ferromagnetic barium hexaferrite powders by self-propagating high-temperature synthesis (SHS) in an electric field applied by a contactless method. Our results indicate that the field strength has a significant effect on the phase composition of the synthesis product. This effect is interpreted in terms of the decomposition kinetics of the solid oxidant and reactant diffusion. Microstructural examination demonstrates that an electric field has a marked effect on the orphology of SHS materials. The magnetic properties of the synthesized powders depend significantly on both the strength and direction of the applied field

Найти похожие

 1-10    11-21   21-21 
 

Сиглы отделов ЦНБ УрО РАН


  бр.ф. - Бронированный фонд

  бф - Научно-библиографический отдел

  БХЛ - Фонд художественной литературы

  ИИиА -Фонд исторической литературы в ЦНБ УрО РАН

  ИМЕТ -Отдел ЦНБ в Институте металлургии УрО РАН

  кх - Отдел фондов (книгохранениe)

  МБА - Межбиблиотечный абонемент

  мф - Методический фонд

  ок - Отдел научной каталогизации

  оку - Отдел комплектования и учета

  орф - Обменно-резервный фонд

  пф - Читальный зал деловой и патентной информации

  рк - Фонд редкой книги

  ч/з - Главный читальный зал

  эр - Зал электронных ресурсов

  

Сиглы библиотек институтов и НЦ УрО РАН
© Международная Ассоциация пользователей и разработчиков электронных библиотек и новых информационных технологий
(Ассоциация ЭБНИТ)
Яндекс.Метрика