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21 Result(s)

within V. V. Kharton Remove this filter English Remove this filter Characterization and Evaluation of Materials Remove this filter

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  1. No Access

    Article

    Electrochemical behavior of perovskite-type Ce1−xCaxVO3 under reducing conditions

    The incorporation of calcium into the zircon-type lattice of Ce1−xCaxVO4 (x = 0.2–0.4), stable at atmospheric oxygen pressure, leads to a modest decrease in the unit cell volume and electrical conductivity, predo...

    E. V. Tsipis, D. V. Zhigacheva, A. O. Zhigachev… in Journal of Solid State Electrochemistry (2024)

  2. No Access

    Article

    Ionic transport in (La,Sr)CoO3-δ ceramics

    Increasing Sr2+ concentration and the creation of A-site deficiency in La1-x-ySrxCoO3-δ (x = 0.3–0.7, y = 0–0.05) increase oxygen ionic conductivity, oxygen permeability of the dense ceramic membranes, and surfac...

    E. V. Tsipis, E. N. Naumovich, M. V. Patrakeev… in Journal of Solid State Electrochemistry (2021)

  3. No Access

    Article

    Defect formation, ordering, and transport in SrFe1–x Si x O3–δ (x = 0.05–0.20)

    Oxygen nonstoichiometry of perovskite-like SrFe1–x Si x O3–δ (x = 0.05–0.20), studied by thermogravimetric analysis and coulometric titration in ...

    O. V. Merkulov, E. N. Naumovich, M. V. Patrakeev… in Journal of Solid State Electrochemistry (2018)

  4. No Access

    Article

    Grain-boundary states in solid oxide electrolyte ceramics processed using iron oxide sintering aids: a Mössbauer spectroscopy study

    In order to appraise microstructure-determined defect formation processes and minor intergranular states in the solid electrolyte materials sintered employing transition metal oxide additives, the transmission...

    E.V. Tsipis, J.C. Waerenborgh, V.V. Kharton in Journal of Solid State Electrochemistry (2017)

  5. No Access

    Article

    Ion transport in dual-phase SrFe1−xТаxO3−δ (x = 0.03 − 0.10): effects of redox cycling

    The incorporation of tantalum cations in mixed-conducting SrFe1-xTaxO3−δ (x = 0.03 − 0.10) results in the formation of single cubic perovskite-like phases in oxidizing atmospheres while under red...

    E. V. Shalaeva, M. V. Patrakeev, A. A. Markov… in Journal of Solid State Electrochemistry (2015)

  6. No Access

    Article

    Electrical, electrochemical, and thermomechanical properties of perovskite-type (La1−x Sr x )1−y Mn0.5Ti0.5O3−δ (x = 0.15–0.75, y = 0–0.05)

    Strontium additions in (La1−x Sr x )1−y Mn0.5Ti0.5O3−δ (x = 0.15–0.75, y = 0–0.05) having a rhombohedrally distorted perovskite s...

    V. A. Kolotygin, E. V. Tsipis, A. I. Ivanov… in Journal of Solid State Electrochemistry (2012)

  7. No Access

    Article

    Behavior of (La,Sr)CoO3- and La2NiO4-based ceramic anodes in alkaline media: compositional and microstructural factors

    The behavior of dense ceramic anodes made of perovskite-type $$ {\text{La}}_{{1 - x - y}} {\text{Sr}}_{x} {\text{Co}}_{{1 - z}} {\text...

    S. K. Poznyak, V. V. Kharton, J. R. Frade… in Journal of Solid State Electrochemistry (2008)

  8. No Access

    Article

    Oxygen permeability, stability and electrochemical behavior of \( \Pr _{2} {\text{NiO}}_{{4 + \delta }} \) -based materials

    The high-temperature electronic and ionic transport properties, thermal expansion and stability of dense $$ \Pr _{2} {\text{NiO}}_{{4 ...

    A. V. Kovalevsky, V. V. Kharton, A. A. Yaremchenko… in Journal of Electroceramics (2007)

  9. No Access

    Article

    Oxygen transport and thermomechanical properties of SrFe(Al)O3-δ –SrAl2O4 composites: microstructural effects

    Measurements of oxygen permeation through dense % MathType!Translator!2!1!AMS LaTeX.tdl!TeX -- AMS-LaTeX! % MathType!MTEF!2!1!+- % feaaeaart1ev0aaatCvAUfeBSjuyZL2yd9gzLbvyNv2CaerbbjxAHX % garmW...

    V. V. Kharton, A. V. Kovalevsky… in Journal of Solid State Electrochemistry (2006)

  10. No Access

    Article

    Applicability of emf measurements under external load resistance conditions for ion transport number determination

    In order to evaluate the applicability of concentration cells for the ion transference number measurements with external load, the cell response was simulated with variable transport properties of the cell mat...

    J. R. Frade, V. V. Kharton, A. A. Yaremchenko… in Journal of Solid State Electrochemistry (2006)

  11. No Access

    Article

    Oxygen permeability of mixed-conducting composite membranes: effects of phase interaction

    Composite ceramic membranes, based on selected combinations of ionic conductors ((La0.9Sr0.1)0.98Ga0.8Mg0.2O3-δ—LSGM or Ce0.8Gd0.2O2-δ—CGO) and electronic/mixed conductors (La2Ni0.8Cu0.2O4+δ—LNC, La0.8Sr0.2Fe0.8C...

    A. L. Shaula, V. V. Kharton, F. M. B. Marques… in Journal of Solid State Electrochemistry (2006)

  12. No Access

    Article

    Transport and electrocatalytic properties of La0.3Sr0.7Co0.8Ga0.2O3−δ membranes

    Incorporation of gallium into the perovskite lattice of La0.3Sr0.7CoO3−δ leads to increasing unit cell volume and to decreasing thermal expansion, total conductivity and oxygen permeability. At 973–1223 K, the ox...

    V. V. Kharton, E. V. Tsipis, I. P. Marozau… in Journal of Solid State Electrochemistry (2005)

  13. No Access

    Article

    Cellulose-precursor synthesis of nanocrystalline Ce0.8Gd0.2O2−δ for SOFC anodes

    Developments of intermediate-temperature solid oxide fuel cells (IT SOFCs) require novel anode materials with a high electrochemical activity at 800–1070 K. The polarization of cermet anodes, made of nickel, c...

    E. V. Tsipis, V. V. Kharton, I. A. Bashmakov… in Journal of Solid State Electrochemistry (2004)

  14. No Access

    Article

    Properties of CaTi1 − xFe x O3 − δ Ceramic Membranes

    CaCO3, TiO2 and Fe2O3 were mixed in the appropriate stoichiometric quantities and calcined at 1100∘C for 10 h. These powder mixtures were uniaxially pressed and sintered at temperatures ranging from 1350 to 1500_...

    F. M. Figueiredo, M. R. Soares, V. V. Kharton… in Journal of Electroceramics (2004)

  15. No Access

    Article

    Stability and Thermal Expansion of Na+-Conducting Ceramics

    An impedance spectroscopy study of sodium cation-conducting ceramics, including layered compounds Na0.8Ni0.4Ti0.6O2, Na0.8Fe0.8Ti0.2O2, Na0.8Ni0.6Sb0.4O2 (structural type O3), Na0.68Ni0.34Ti0.66O2 (P2 type), and ...

    O.A. Smirnova, R.O. Fuentes, F. Figueiredo, V.V. Kharton… in Journal of Electroceramics (2003)

  16. No Access

    Article

    Oxygen ionic and electronic transport in Gd2−xCaxTi2O7 −δ pyrochlores

    Oxygen ion transference numbers for Gd2−xCaxTi2O7 −δ (x=0.10–0.14) pyrochlore ceramics were determined at 973–1223 K by the modified e.m.f. and faradaic efficiency techniques, taking into account electrode polari...

    V. V. Kharton, E. V. Tsipis, A. A. Yaremchenko… in Journal of Solid State Electrochemistry (2003)

  17. No Access

    Article

    Mechanically-Activated Synthesis and Mixed Conductivity of TbMO4−δ (M = Zr, Hf) Ceramics

    Terbium hafnate and zirconate ceramics with submicron grain sizes were prepared via mechanically-activated synthesis. X-ray and electron diffraction and infrared (IR) absorption spectroscopy showed that TbZrO4−δ ...

    E.V. Tsipis, A.V. Shlyakhtina, L.G. Shcherbakova… in Journal of Electroceramics (2003)

  18. No Access

    Article

    Synthesis, Physicochemical Characterization and Ionic Conductivity of LaGa0.4Mg0.2M0.4O3−δ (M = Cr, Mn, Fe, Co)

    Partial electronic and ionic conductivities, crystal structure, thermal expansion and infrared absorption spectra of the perovskite-type series, LaGa0.40Mg0.20M0.40O3−δ (M = Cr, Mn, Fe, and Co), have been studied...

    V.V. Kharton, A.A. Yaremchenko, A.P. Viskup, G.C. Mather… in Journal of Electroceramics (2001)

  19. No Access

    Article

    Ceria-based materials for solid oxide fuel cells

    This paper is focused on the comparative analysis of data on electronic and ionic conduction in gadolinia-doped ceria (CGO) ceramics as well as on the electrochemical properties of various oxide electrodes in ...

    V. V. Kharton, F. M. Figueiredo, L. Navarro… in Journal of Materials Science (2001)

  20. No Access

    Article

    Physicochemical and Transport Properties of Bicuvox-Based Ceramics

    Polycrystalline Bi2-xLaxV0.90Cu0.10O5.5-α (x = 0, 0.10 and 0.20) and Bi1.90Pr0.10V0.90Cu0.10O5.5-α were prepared by the standard ceramic synthesis technique. Electrical conductivity of the Bi1.90La0.10V0.90Cu0.10

    A.A. Yaremchenko, V.V. Kharton, E.N. Naumovich… in Journal of Electroceramics (2000)

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