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1.
Инвентарный номер: нет.
   
   M 38


   
    Mass transfer of d-metals in ionic-electronic melts [Text] / N. I. Shurov, A. I. Anfinogenov, V. V. Chebykin, V. G. Zyryanov // Progress in Molten Salt Chemistry: Proceedings from the EUCHEM 2000 Conference on Molten Salts (Denmark, August 20-25, 2000). - V. 1. - P487-491. - Bibliogr.: p. 491 (10 ref.)
ББК 54
Рубрики: ХИМИЧЕСКИЕ НАУКИ
Кл.слова (ненормированные):
МАССОПЕРЕНОС -- d-МЕТАЛЛЫ -- РАСПЛАВ ИОННО-ЭЛЕКТРОННЫЙ -- LiCl -- LiCl-Li -- CaCl2-Ca -- Ca -- BaCl2-Ba -- CaCl2 -- BaCl2 -- Ba -- КАЛЬЦИЙ -- ХЛОРИД ЛИТИЯ -- ЛИТИЙ -- ХЛОРИД КАЛЬЦИЯ -- БАРИЙ -- ХЛОРИД БАРИЯ -- РАСПЛАВ ХЛОРИДНЫЙ -- ХЛОРИД РАСПЛАВЛЕННЫЙ -- ПОКРЫТИЕ ДИФФУЗИОННОЕ
Аннотация: Isothermal mass transfer of d-metals in ionic-electronic melts LiCl-Li, CaCl2-Ca, BaCl2-Ba was examined for the first time. Experiments were performed in the atmosphere of purified argon in containers made of low-carbon steel. the transfer process was checed by weighing the sample's substrate and also by the methods of metallographic and X-ray microanalysis of the surface layer and cross microsections. The mass transfer was analyzed as Mn, Mo, Ni, Co, Cr - Fe in the LiCl-Li melt, Mn, Cr - Fe and Mn - Ti in the CaCl2-Ca melt, and Mo, Cr, Ni - Fe and Cu - Ni in the BaCl2-Ba melt. The direction of transfer in ionic-electronic melts was from less soluble to more soluble metals. We hypothesize that d-metals are transferred by their anions Me(n-) in ionic-electronic melts

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2.
Инвентарный номер: нет.
   
   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.
ББК 54
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.

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3.
Инвентарный номер: нет.
   
   S 89


   
    Structure peculiarities of carbon-coated lithium titanate: raman spectroscopy and electron microscopic study / D. G. Kellerman, V. S. Shalaeva , E. V. Shalaeva, B. A. Tsaryev, E. G. Vovkotrub // Solid State Sciences. - 2014. - Vol. 14, № 1. - С. 72-79
ББК 54
Рубрики: ХИМИЧЕСКИЕ НАУКИ
Кл.слова (ненормированные):
КОМПОЗИТ -- АРГОН -- СПЕКТРОСКОПИЯ -- КОМБИНАЦИОННОЕ РАССЕЯНИЕ
Аннотация: Li4Ti4.92(CrV)0.04O12/C composites were synthesized at 800 °C under a flow of argon/acetylene gas mixture taken in the 40:1volumetric ratio. X-ray diffraction (XRD), thermogravimetric analysis (TGA), magnetic susceptibility, Raman spectroscopy, and electron microscopy (TEM) were used to characterize the phase structure, composition, and morphology of the composites. Transmission electron microscopy and Raman spectroscopy confirmed that carbon exists on the surface of the spinel matrix. The composites proved to have a modified structure in comparison with the pristine spinel phase.

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4.
Инвентарный номер: нет.
   
   A 44


   
    Aluminide thermal diffusion plating on metals and alloys in powder mixtures at surface mechanochemical activation / K. R. Karimov, YA. B. Chernov , V. V. Chebykin, A. A. Pankratov, Ye. S. Filatov // INTERFINISH-SERIA 2014 International Conference on Surface Engineering for Research аnd Industrial Applications. - Novosibirsk, 2014. - С. 69
ББК 54
Рубрики: ХИМИЧЕСКИЕ НАУКИ
Кл.слова (ненормированные):
ТЕРМОДИФФУЗИЯ -- СМЕСИ ПОРОШКОВЫЕ

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5.
Инвентарный номер: нет.
   
   O-97


   
    Oxygen tracer diffusion and surface exchange kinetics in Ba0.5Sr0.5Co0.8Fe0.2O3 − δ / A. Berenov, A. Atkinson, J. Kilner, M. Ananyev, V. Eremin, N. Porotnikova, A. Farlenkov, E. Kurumchin, H. J. M. Bouwmeester, E. Bucher, W. Sitte // Solid State Ionics. - 2014. - Vol. 268, Pt. A. - P102-109
ББК 54
Рубрики: ХИМИЧЕСКИЕ НАУКИ
Кл.слова (ненормированные):
бАРИЙ -- СТРОНЦИЙ -- кИСЛОРОД -- МАСС-СПЕКТРОСКОПИЯ -- ТЕПЛООБМЕН -- ТВЕРДООКСИДНЫЕ ТОПЛИВНЫЕ ЭЛЕМЕНТЫ -- Газ-фазовый анализ
Аннотация: The oxygen tracer diffusion coefficient, Db⁎, and the oxygen tracer surface exchange coefficient, k, were measured in Ba0.5Sr0.5Co0.8Fe0.2O3 − δ (BSCF5582) over the temperature range of 310–800 °C and the oxygen partial pressure range of 1.3 × 10− 3–0.21 bar. Several measurement techniques were used: isotope exchange followed by depth profiling (IEDP) within individual single grains or line scanning (IELS) along the sample cross-section and gas-phase analysis (GPA). Surface exchange kinetics was initially found to be slow and presumably inhibited by the formation of a passivating layer on the sample surface. High temperature pre-anneals (900–950 °C) changed the nature of this layer and enhanced surface exchange. Fast bulk oxygen diffusion and surface exchange kinetics were observed after high temperature pre-anneals within the temperature range studied. The activation energies for 18O tracer diffusion and surface exchange at 0.21 bar were 0.72 ± 0.05 and 1.10 ± 0.15 eV, respectively. The tracer diffusion coefficient showed weak dependence upon oxygen partial pressure, whereas the surface exchange coefficient exhibited strong oxygen partial pressure dependence. The microstructure of the samples (the porosity and grain size) had a profound effect on the measured tracer diffusion coefficient.

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6.
Инвентарный номер: нет.
   
   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.
ББК 54
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.

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7.
Инвентарный номер: нет.
   
   I-85


    Isaev, V. A.
    Galvanostatic nucleation and growth under diffusion control / V. A. Isaev, O. V. Grishenkova // Journal of Solid State Electrochemistry . - 2013. - Vol. 17, № 6. - С. 1505-1508. - Bibliogr. : p. 1508 (18 ref.)
ББК 54
Рубрики: ХИМИЧЕСКИЕ НАУКИ
Кл.слова (ненормированные):
ДИФФУЗИЯ -- ОСАЖДЕНИЕ -- ЭЛЕКТРОЛИТ -- ЭЛЕКТРООСАЖДЕНИЕ -- ЗАРОЖДЕНИЕ
Аннотация: A theory is proposed for galvanostatic three-dimensional nucleation and growth of new phase clusters controlled by diffusion of depositing ions in the bulk of the electrolyte to the clusters surface. The mathematical model is used to calculate the time dependences of the overpotential, number, and size of clusters formed on the electrode

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8.
Инвентарный номер: нет.
   
   T 44


   
    Theoretical and experimental study of anode process at the carbon in KF–AlF3–Al2O3 melts / V. N. Nekrasov, A. B. Suzdaltsev, O. V. Limanovskaya, A. P. Khramov, Yu. P. Zaikov // Electrochimica Acta. - 2012. - Vol. 75. - С. 296-304. : граф. - Библиогр.: с. 303-304 (31 ref.) . - ISSN 0013-4686
ББК 54
Рубрики: ХИМИЧЕСКИЕ НАУКИ
Кл.слова (ненормированные):
ЭЛЕКТРОЛИЗ АЛЮМИНИЯ -- ТЕМПЕРАТУРА -- АНОД -- ПОЛЯРИЗАЦИЯ
Аннотация: The influence of the [KF]/[AlF3] ratio (1.1–1.5 mol mol−1), the Al2O3 concentration (1–5 wt.%) and the temperature (973–1073 K) on the overpotential of the anode process for a glassy carbon electrode in a KF–AlF3–Al2O3 melt under stationary and non-stationary conditions was studied by galvanostatic polarisation and chronopotentiometry. A theoretical (mathematical) description of the two-step electrode process at the carbon anode in KF–AlF3–Al2O3 melts under stationary and non-stationary conditions is suggested. The charge of the electric double-layer, the formation of an intermediate COads adsorption product at the anode surface, the limitations of the current transfer, which include the charge transfer through the electrode/electrolyte interface, and the diffusion and chemical interaction of the electroactive ions in the melt near the anode surface were taken onto account. Alterations of the basic parameters of the process were monitored and analysed. Estimates of anode process kinetics parameters (e.g., exchange current densities and the degree of the anode surface coverage by the intermediate product COads) for different experimental conditions were made by a comparison of the modelled and experimental polarisation curves. The electrochemical desorption of the intermediate product COads from the anode surface (the second step) was shown to be relatively slower than the charge transfer process (the first step). In addition, slow chemical reactions at current densities of 0.1–1 A cm−2 can occur prior to the electrode process.

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9.
Инвентарный номер: нет.
   
   E 43


   
    Electrochemical properties of ceramic membranes based on SrTi0.5Fe0.5O3−δ in reduced atmosphere / A. Murashkina, V. Maragou, D. Medvedev, V. Sergeeva, A. K. Demin, P. Tsiakaras // International Journal of Hydrogen Energy. - 2012. - Vol. 37, № 19. - С. 14569-14575. - Bibliogr. : p. 14675 (23 ref.) . - ISSN 03060-319
ББК 54
Рубрики: ХИМИЧЕСКИЕ НАУКИ
Кл.слова (ненормированные):
ТЕМПЕРАТУРА -- СВОЙСТВА -- СОПРОТИВЛЕНИЕ ЭЛЕКТРОННОЕ
Аннотация: The present work aims at the investigation of the electrochemical properties of SrTi0.5Fe0.5O3−δ as a membrane material for hydrogen production via electrochemical reforming. The dependence of the electrical conductivity on the oxygen partial pressure, as well as the oxygen permeability in the range of 10−20 atm ≤ ≤ 10−14 atm is examined. The oxygen permeability is measured by an electrochemical method. The dependences of ion current as a function of the electromotive force (EMF) at various temperatures, oxygen partial pressures and the membrane surface conditions (rough and activated by PrOx) are studied. Finally, the values of hydrogen flux at different temperatures are calculated and a long term investigation during 600 h at = 10−19 atm, T = 1173 K is carried out. According to the present results, the permeation current increases with the increase of temperature, oxygen partial pressure gradient and activation by PrOx. The long term investigation shows that the electrical resistance of the SrTi0.5Fe0.5O3−δ ceramic membrane increases by 10%, possibly due to the formation of micro-domains into the material's volume and the decrease in the grain boundary conductivity, because of the segregation of dopant-rich layers near the grain boundaries.

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10.
Инвентарный номер: нет.
   
   Э 47


   
    Эллипсометрическое исследование окисления поверхности сплавов алюминия с "тяжелыми"РЗМ = Ellipsometrical investigation of surface oxidation of aluminium alloys with "heavy" REM / Л. А. Акашев, Н. А. Попов, В. А. Кочедыков, В. Г. Шевченко // Расплавы. - 2011. - № 2. - С. 58-62. : рис. - Библиогр.: с. 62 (4 назв.)
ББК 54
Рубрики: ХИМИЧЕСКИЕ НАУКИ
Кл.слова (ненормированные):
ЭЛЛИПСОМЕТРИЯ -- ОКИСЛЕНИЕ -- СПЛАВЫ АЛЮМИНИЯ -- РЗМ -- МЕТАЛЛЫ РЕДКОЗЕМЕЛЬНЫЕ
Аннотация: С помощью метода эллипсометрии исследованы процессы окисления поверхности сплавов алюминия с "тяжелыми" редкоземельными металлами эвтектического состава при 873 К на воздухе

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