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  1. 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)

  2. No Access

    Article

    Isoreticular two-dimensional magnetic coordination polymers prepared through pre-synthetic ligand functionalization

    Chemical functionalization is a powerful approach to tailor the physical and chemical properties of two-dimensional (2D) materials, increase their processability and stability, tune their functionalities and, ...

    J. López-Cabrelles, S. Mañas-Valero, I. J. Vitórica-Yrezábal… in Nature Chemistry (2018)

  3. No Access

    Article

    Transport and Electrochemical Properties of SrFe(Al,Mo)O3–δ

    In this work, effects of molybdenum do** on the crystal structure, stability, electrical conductivity, oxygen permeability and thermomechanical properties of Sr(Fe,Al)O3–δ-based perovskites, were studied. The e...

    V. A. Kolotygin, E. V. Tsipis, A. A. Markov… in Russian Journal of Electrochemistry (2018)

  4. 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)

  5. 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)

  6. 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)

  7. No Access

    Article

    Insertion of iron oxide in calciumsilicate gel-derived materials

    Samples of the composition of 10Fe2O3·10CaO·80SiO2 were prepared by the sol-gel method and heat-treated in different atmospheres. They were investigated by X-ray diffraction, scanning electron microscopy and Möss...

    M. G. Ferreira da Silva, J. C. Waerenborgh in Journal of Radioanalytical and Nuclear Che… (2007)

  8. No Access

    Article

    Mössbauer Spectra and Catalytic Behaviorof Perovskite-like SrFe0.7Al0.3O3-δ

    Mixed-conducting SrFe0.7Al0.3O3-δ (SFA) exhibits substantial catalytic activity towards partial oxidation of methane and can thus be considered as a component of monolithic ceramic reactors for synthesis gas gene...

    V. V. Kharton, J. C. Waerenborgh, D. P. Rojas, A. A. Yaremchenko… in Catalysis Letters (2005)

  9. No Access

    Article

    Defect formation and transport in SrFe1-xAlxO3-δ

    Perovskite-related phases derived from SrFeO3-δ are among known mixed conductors with highest oxygen permeability and are thus of interest as the ceramic membrane materials for oxygen separation and partial oxida...

    A. L. Shaula, V. V. Kharton, M. V. Patrakeev, J. C. Waerenborgh, D. P. Rojas… in Ionics (2004)

  10. 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)

  11. No Access

    Chapter

    Non-Fermi Liquid Behavior in U3-xNi3Sn4-ySingle Crystals

    The behavior of an increasing number of metallic, paramagnetic 4f-and 5f-electron systems are known to be inconsistent with simple Fermi liquid theory. Although magnetic order is the typical groundstate for ra...

    L. Shlyk, J. C. Waerenborgh, P. Estrela… in Electron Correlations and Materials Proper… (1999)

  12. No Access

    Article

    Powder XRD structure refinements and 57Fe Mössbauer effect study of synthetic Zn1-xFexAl2O4 (0 < x ≦ 1) spinels annealed at different temperatures

    Members of the solid solution series Zn1-x Fe x Al2O4 (x = 0.2, 0.4, 0.6 and 1.0) with spinel structure were synthesized by direct solid-state reaction of the simple metal oxides...

    J. C. Waerenborgh, M. O. Figueiredo, J. M. P. Cabral… in Physics and Chemistry of Minerals (1994)

  13. No Access

    Article

    X-ray powder diffraction and57Fe Mössbauer spectroscopy study of the thermal breakdown of vivianite, Fe3(PO4)2.8H2O

    Ferric phosphates resulting from the thermal breakdown of natural Fe3(PO4)2.8H2O are studied by X-ray powder diffraction and Mössbauer spectroscopy. Total iron oxidation and water release give rise to an amorphou...

    J. C. Waerenborgh, M. O. Figueiredo in Hyperfine Interactions (1986)