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Общее количество найденных документов : 50
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1.
Инвентарный номер: нет.
   
   S 53


    Shardakov, N. T.
    A Geometrical Model of Glass-Enamel Coating. Part I. Calculation of the Open Surfase Fraction of Enameled Metal [Text] / N. T.; Institute of High-Temperature Electrochemistry (Ural Department of the RAS) Shardakov, V. Ya.; Institute of High-Temperature Electrochemistry (Ural Department of the RAS) Kudyakov // Protection of metals (Russia). - 2004. - V.40 , N 6. - P634-640. - Bibliogr.: p. 640 (13 ref). . - ISSN 0044-1856
ББК 54
Рубрики: ХИМИЧЕСКИЕ НАУКИ
Кл.слова (ненормированные):
GEOMETRICAL MODEL -- GLASS-ENAMEL COATING -- ENAMELED METAL -- CALCULATION -- SURFACE -- GAS BUBBLES -- MACROSTRUCTURE
Аннотация: A geometrical model of glass-enamel coating (GEC) is proposed. Gas bubbles are chosen as the basic elements of its macrostructure, and the fundamental principles of the model are formulated. A model equation correlating the fraction of the open metal surface with the dissolution depth of enamel and GEC parameters is derived. Partial equations are derived according to various laws of the bubble size distribution such as invariance of the size, equal probability of any size, and normal, or lognormal distribution of bubbles over the size. It is shown that the open surface fraction always increases with the concentration of bubbles and contact angle, whereas its dependence on the GEC thickness and the statistical characteristics of the totality of bubbles has a more complex character

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2.
Инвентарный номер: нет.
   
   A 10


   
    A modifying of a metal surface by high-temperature plasma impulse as a method of improvement of aluminum corrosion resistance in molten salts [Text] / L. A. Yolshina, V. Y. Kudyakov, V. N. Lyashenko, S. S. Tserevitinov // Progress in Molten Salt Chemistry: Proceedings from the EUCHEM 2000 Conference on Molten Salts (Denmark, August 20-25, 2000). - 2000. - V. 1. - P581-585
ББК 54
Рубрики: ХИМИЧЕСКИЕ НАУКИ
Кл.слова (ненормированные):
Al2O3 -- ОКСИД АЛЮМИНИЯ -- АЛЮМИНИЙ -- Al -- СОЛИ РАСПЛАВЛЕННЫЕ -- КОРРОЗИЯ АЛЮМИНИЯ -- РАСПЛАВ СОЛЕВОЙ -- CsCl-NaCl-NaNO3 -- Cs -- Na -- CsCl -- NaCl -- NaNO3 -- ХЛОРИД НАТРИЯ -- НАТРИЙ -- ХЛОРИД ЦЕЗИЯ -- ЦЕЗИЙ -- НИТРАТ НАТРИЯ -- НИТРАТ РАСПЛАВЛЕННЫЙ
Аннотация: It has been investigated corrosion and electrochemical behavior of aluminum, which was pretreated by high-temperature impulse plasma in hydrogen, helium and oxygen media. Plasma surfacing in all gaseous atmospheres leads to the formation of a thin adhesive film of amorphous Al2O3. Thus obtained scale is protective in the temperature range 790-830 K as to chloride melt

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3.
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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4.
Инвентарный номер: нет.
   
   C 47


   
    Charge transfer in mixed proton, oxygen ion and electron solid oxide conductor [Текст] / A. K. Demin, E. V. Gorbova, M. V. Glumov, P. E. Tsiakaras // Ionics. - 2005. - Vol. 11, № 3-4. - С. 289-293. - Библиогр. : с. 293 (3 назв.)
ББК 54
Рубрики: ХИМИЧЕСКИЕ НАУКИ
Кл.слова (ненормированные):
MASS TRANSFER -- PROTON-OXYGEN
Аннотация: Analysis of the equivalent scheme of the mixed proton-oxygen ion-electron conductor (MPOEC) allowed to obtain relationships between parameters of the membrane (total conductivity and transfer numbers) and parameters of the charge and mass transfer through the membrane (partial ion and electron currents, the specific flux of hydrogen at the cathode membrane surface) under regime of electrochemical reforming. It was stated that presence of proton conductivity in addition to oxygen ion conductivity led to increase of total flux of produced hydrogen. However, under conditions typical for the electrochemical reforming of methane into hydrogen, the specific hydrogen flux is about four times lower in the case when the membrane has proton-electron conductivity than in the case when the membrane has oxygen ion-electron conductivity.

\\\\Cserver\\dist\\НБО\\Cтатьи БД ИВТЭ\\Ionics\\2005, V. 11, № 3-4, С. 289-293.pdf
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5.
Инвентарный номер: нет.
   
   S 83


    Stepanov, V. P.
    Composition of the surface layer of molten binary mixtures of alkali fluorides [Text] / V. P. Stepanov, M. V. Smirnov // Melts. - 1988. - V. 2, N 5. - P391-395. - Bibliogr.: 7 ref.
ББК 54
Рубрики: ХИМИЧЕСКИЕ НАУКИ
Кл.слова (ненормированные):
СЛОЙ ПОВЕРХНОСТНЫЙ -- СМЕСЬ РАСПЛАВЛЕННАЯ -- СМЕСЬ БИНАРНАЯ -- ФТОРИД ЩЕЛОЧНЫХ МЕТАЛЛОВ -- МЕТАЛЛЫ ЩЕЛОЧНЫЕ -- СОСТАВ -- ПОВЕРХНОСТЬ
Аннотация: Using the method of maximum pressure in gas bubbles, the surface tensions of nine molten binary mixtures of alkali fluorides are measured. The temperature and concentration dependences of the properties are found. The larger the difference between the cation cizes in the mixture, the greater is the deviation of the surface tension isotherms from linear behavior toward decreasing values. The composition of the surface layer of the mixtures is calculated

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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.
   
   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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8.
Инвентарный номер: нет.
   
   S 17


    Saltykova, N. A.
    Dendrite structure of electrolytic gold deposited from molten chlorides [Текст] / N. A. Saltykova, O. L. Semerikova, N. G. Molchanova // Russian Journal of Electrochemistry. - 2007. - Vol. 43, № 8. - С. 863-869. - Библиогр. : с. 868 (16 назв.)
ББК 54
Рубрики: ХИМИЧЕСКИЕ НАУКИ
Кл.слова (ненормированные):
ЗОЛОТО -- ОСАЖДЕНИЕ -- РАСПЛАВЛЕННЫЕ ХЛОРИДЫ
Аннотация: The structure of gold deposits produced by electrolysis of molten eutectic NaCl-KCl-CsCl at 500-700°e in an inert atmosphere is studied. The initial process on the gold cathode is the epitaxial growth of a layer up to 3 µm thick with a smoothed surface and a considerably later growth of grain boundaries. Gradually, on the protruding parts of deposit, the growth of dendrites starts. The dendrites are the major form of gold deposits. Typical gold dendrites are two-dimensional 2D<112> and 2D<112>n<110> and three-dimensional 3D<100>. Upon supplying air into the atmosphere above the melt at high current densities at the initial period there appears a powder comprising particles of a rounded twisted shape. Probable mechanisms leading to the formation of the iroundedi powder are discussed.

\\\\Cserver\\dist\\НБО\\Cтатьи БД ИВТЭ\\Russian Journal of Electrochemistry\\2007, V. 43, № 8, С. 863-869.pdf
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9.
Инвентарный номер: нет.
   
   D 90


    Dunyushkina, L. A.
    Effect of electrolyte surface on performance of porous SOFC cathodes [Текст] / L. A. Dunyushkina, S. B. Adler // Solid State Electrochemistry, Proceedings of the Risoe International Symposium on Materials Science, 26th, Roskilde, Denmark, Sept. 4-8, 2005. - 2005. - С. 171-176
ББК 54
Рубрики: ХИМИЧЕСКИЕ НАУКИ
Кл.слова (ненормированные):
ELECTROLYTE -- SOFC

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10.
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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