Центральная Научная Библиотека УрО РАН

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   M 73

    Minchenko, V. I.
    Sound-absorption coefficient and bulk viscosity of the molten salt mixtures NaCl-CsCl, NaBr-CsBr, and NaI-CsI [Text] / V. I. Minchenko, M. V. Smirnov // Melts. - 1991. - V. 5, N 6. - P468-473. - Bibliogr.: 11 ref.

ББК 54
Рубрики: ХИМИЧЕСКИЕ НАУКИ
Кл.слова (ненормированные):
КОЭФФИЦИЕНТ ПОГЛОЩЕНИЯ ЗВУКА -- Na -- Cs -- ВЯЗКОСТЬ ОБЪЕМНАЯ -- РАСПЛАВ СОЛЕВОЙ -- NaCl-CsCl -- NaCl -- CsCl -- NaBr-CsBr -- NaBr -- CsBr -- NaI-CsI -- NaI -- CsI -- ХЛОРИД НАТРИЯ -- ХЛОРИД ЦЕЗИЯ -- БРОМИД НАТРИЯ -- БРОМИД ЦЕЗИЯ -- ИОДИД НАТРИЯ -- ИОДИД ЦЕЗИЯ -- НАТРИЙ -- ЦЕЗИЙ
Аннотация: Приведены результаты экспериментального определения коэффициента поглощения звука в бинарных солевых расплавах в диапазоне частот 5*10(+6) - 35*10(+5) Гц в зависимости от температуры и состава. Рассчитана их эффективная, классическая и объемная вязкости. Анализ полученных данных и межионного взаимодействия проведен с привлечением модели (авто)комплексного строения расплавленных галогенидов щелочных металлов
Results are presented of an experimental determination of the absorption coefficient of sound in binary molten salts in the frequency range 5*10(6)-35*10(5) Hz as a function of temperature and the composition. Their effective, classical, and bulk viscosities are calculated. An analysis of the obtained data and interionic interaction is performed based on the model of (auto) complexed structure of molten alkali halides

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   R 42

    Remez, I. D.
    Comparison between properties of double electric layers on solid and molten silver in contact with a ZrO2-Y2O3 crystal [Text] / I. D. Remez, Y. S. Lukach // Melts. - 1990. - V. 4, N 1. - P64-68. - Bibliogr.: 11 ref.

ББК 54
Рубрики: ХИМИЧЕСКИЕ НАУКИ
Кл.слова (ненормированные):
ХИМИЯ -- СЛОИ ДВОЙНЫЕ -- ДВОЙНЫЕ СЛОИ -- СЛОИ ЭЛЕКТРИЧЕСКИЕ -- ЭЛЕКТРИЧЕСКИЕ СЛОИ -- Zr -- ZrO2 -- ZrO2-Y2O3 -- Y -- Y2O3 -- ОКСИД ИТТРИЯ -- ОКСИД ЦИРКОНИЯ -- ИТТРИЙ -- ЦИРКОНИЙ -- МОНОКРИСТАЛЛЫ -- СЕРЕБРО РАСПЛАВЛЕННОЕ -- РАСПЛАВЛЕННОЕ СЕРЕБРО -- СЕРЕБРО ТВЕРДОЕ -- ТВЕРДОЕ СЕРЕБРО -- Ag -- ЭЛЕКТРОЛИТЫ ОКСИДНЫЕ -- ОКСИДНЫЕ ЭЛЕКТРОЛИТЫ -- ЭЛЕКТРОЛИТЫ ПОЛИКРИСТАЛЛИЧЕСКИЕ -- ПОЛИКРИСТАЛЛИЧЕСКИЕ ЭЛЕКТРОЛИТЫ
Аннотация: The behavior of the binary layer on molten and solid silver in contact with a ZrO2-0.1Y2O3 single crystal is investigated in the temperature range 850-1070 C. The dependences obtained in solid and molten silver are qualitatively similar. The results are compared with those for a polycrystalline oxide electrolyte. Relaxation is found to occur in the potential at the minimum in power with frequency

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   R 59

    Ringuede, A.
    Assessment of Ni/YSZ anodes prepared by combustion synthesis [Text] / A. Ringuede, D. Bronine, J. R. Frade // Solid State Ionics. - 2002. - V. 146, N 3-4. - P219-224 . - ISSN 0167-2738

ББК 54
Рубрики: ХИМИЧЕСКИЕ НАУКИ
Кл.слова (ненормированные):
ХИМИЯ -- Ni -- НИКЕЛЬ -- YSZ -- Y -- Zr -- ИТТРИЙ -- ЦИРКОНИЙ -- ZrO2-Y2O3 -- ZrO2 -- Y2O3 -- ДИОКСИД ЦИРКОНИЯ -- ОКСИД ИТТРИЯ
Аннотация: Homogeneous mixtures of nanocrystalline powders of (NiO+Ni)/YSZ were obtained by combustion synthesis, and used to prepare Ni/YSZ cermets for symmetrical cermet/YSZ/cermet cells. These cells were prepared by co-pressing, co-firing at 1450 C, and reduction in 10 % H2-90 % N2 at 800 C. The resulting Ni/YSZ cermets are porous and adherent to the electrolyte, and its metallic and ceramic components are uniformly distributed. Impedance spectroscopy was used to characterise these symmetrical cells in atmospheres containing H2 and H2O. The impedance spectra show that the electrode reactions comprise at least two processes with different relaxation frequencies. The low frequency contribution of the polarisation resistance is very dependent on the partial pressures of H2 and H2O. The contribution at higher frequency is mainly dependent on temperature

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   R 59

    Ringuede, A.
    Ni1-xCox/YSZ cermet anodes for solid oxide fuel cells [Text] / A. Ringuede, D. Bronine, J. R. Frade // Electrochimica Acta. - 2002. - V. 48, N 4. - P437-442. - Bibliogr.: p. 441-442 (15 ref.) . - ISSN 0013-4686

ББК 54
Рубрики: ХИМИЧЕСКИЕ НАУКИ
Кл.слова (ненормированные):
ХИМИЯ -- SOFC -- ТВЕРДООКСИДНЫЕ ТОПЛИВНЫЕ ЭЛЕМЕНТЫ -- YSZ -- ZrO2-Y2O3 -- ZrO2 -- Y2O3 -- Zr -- Y -- ДИОКСИД ЦИРКОНИЯ -- ЦИРКОНИЙ -- ОКСИД ИТТРИЯ -- ИТТРИЙ -- Ni1-xCox -- Ni -- Co -- НИКЕЛЬ -- КОБАЛЬТ -- ТОПЛИВНЫЕ ЭЛЕМЕНТЫ -- ЭЛЕМЕНТЫ ТОПЛИВНЫЕ
Аннотация: Nanocrystalline and homogeneous powder mixtures of (Ni1-xCoxOy)+YSZ were obtained by combustion synthesis, and reduced in H2 at 800 C to obtain Ni1-xCox/YSZ cermets, and three layer symmetrical cells cermet/YSZ/cermet. These three layer cells were co-firing at 1450 C, and then reduced to obtain porous Ni1-xCox/YSZ cermet layers with good adhesion to the electrolyte. Results obtained under OCV show that partial substitution of Ni with Co lowers the polarisation resistance, especially the main contribution which is usually most dependent on the cermets microstructure. This trend is reverted for high fractions of Co, and the polarisation resistance obtained for Co/YSZ cermets is much higher than for Ni/YSZ. The low frequency contribution of the polarisation resistance was mainly dependent on the partial pressures of H2 and H2O, and is less dependent on the substitution of Ni with Co

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   S 19

    Samgin, A. L.
    Lattice-assisted proton hopping in oxides at low temperatures / A. L. Samgin // Journal of Physics and Chemistry of Solids. - 2013. - Vol. 74, № 12. - С. 1661-1668. - Библиогр.: с. 1668 (44 ref.)

ББК 54
Рубрики: ХИМИЧЕСКИЕ НАУКИ
Кл.слова (ненормированные):
ЭЛЕКТРООСАЖДЕНИЕ -- РАФИНИРОВАНИЕ -- СПЛАВЫ
Аннотация: Stimulated diffusion of protons in oxides such as ABO3 crystals and rutile TiO2 is discussed in the context of quantum Brownian motion. A self-consistent lattice-assisted proton hopping (LAPH) model is developed by going from white noise (characteristic of the standard stochastic theory of superionic conduction) to colored noise in the Markovian limit. This model differs from the commonly used ion jump models in that the hydrogen diffusion rate prefactor is identified as a quantity proportional to the frequency of phonon assistance. Application of the quantum fluctuation–dissipation theorem suggests that the dynamic activation energy for diffusion is a function of a bath-mode frequency. The LAPH model can predict enhanced rates of barrier jumping at room temperature compared to thermally activated proton diffusion. This indicates that low-temperature solid oxide devices are potential candidates for use in hydrogen energy research. The LAPH model offers a valid explanation for the mechanism of high protonic mobility recently observed for TiO2 in a picosecond transient pump-probe experiment. This unexpected dominant lattice relaxation channel must be considered as a new classical-like (but low-temperature) proton transfer mechanism. For vibration-assisted protonic jumps to occur at low temperature, the phonon assistance must be classified as a low-frequency vibration specific to each lattice

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   M 85


    Morphology and transport properties of the solid electrolyte LI7LA3ZR2O12 prepared by the solid-state and citrate-nitrate methods / E. A. Il'Ina , O. L. Andreev , B. D. Antonov , N. N. Batalov // Journal of Power Sources. - 2012. - Vol. 201. - С. 169-173.

ББК 54
Рубрики: ХИМИЧЕСКИЕ НАУКИ
Кл.слова (ненормированные):
ЭЛЕКТРОЛИТ ТВЁРДЫЙ -- МОРФОЛОГИЯ -- ПРОВОДИМОСТЬ
Аннотация: Tetragonal Li7La3Zr2O12 (LLZ) was synthesised by the solid-state and citrate–nitrate methods. The crystal structure of the samples was characterised by the X-ray diffraction method. The morphology of the particles was investigated using both optical microscopy and a particle size analysis method. The ceramic samples were studied by complex impedance spectroscopy in the frequency range from 12 to 105 Hz, in the temperature range of 20–400 °C. Synthesis by the citrate–nitrate method makes it possible to reduce both the temperature and time of the synthesis and also prepare the product with smaller particles. The conductivity of LLZ synthesised by the citrate–nitrate method (5.2 × 10−6 S cm−1 at 20 °C) is higher than the conductivity of LLZ synthesised by the solid-state method (1.3 × 10−6 S cm−1 at 20 °C).

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   E 99

    Ezin, A. N.
    Theoretical underpinnings of a method of reduction of operating temperature of solid oxide fuel cells under resonant light irradiation / A. N. Ezin, A. L. Samgin // International Journal of Hydrogen Energy. - 2015. - Vol. 40, № 29. - P8948-8957. - Bibliogr. : p. 8956-8957 (34 ref.)

ББК 54
Рубрики: ХИМИЧЕСКИЕ НАУКИ
Кл.слова (ненормированные):
ТОПЛИВНЫЕ ЭЛЕМЕНТЫ -- ПЕРЕНОС ПРОТОННЫЙ
Аннотация: This study examines potential benefits of adopting ultrashort optical pulses in fuel cell technology. General principles for jumping migration of protons in resonant laser fields have been elaborated. We find that, depending upon the frequency of phonon assistance, the effective activation energy for migration can be strongly diminished when excitation pulses are used. The obtained results indicate that at room temperature the picosecond-laser-induced proton transfer in rutile type oxides is much faster than that for thermal activation. Our estimates are in good agreement with time-resolved measurements for rutile samples excited by infrared light. The fundamentals of this transfer process are briefly analyzed in the light of structure diffusion and vibrational mode models. The most important conclusion to emerge from our work is that the use of the optical stimulation shows considerable promise as a means for decreasing the operating temperature of solid oxide fuel cells based on proton hopping transport.

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