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6 Result(s)

within T. N. Afonasenko Remove this filter Atomic, Molecular, Optical and Plasma Physics Remove this filter

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  1. No Access

    Article

    OPERANDO X-RAY DIFFRACTION ANALYSIS OF THE MnOx–ZrO2 CATALYST DURING OXIDATION OF PROPANE

    A series of MnOx–ZrO2 catalysts is prepared by coprecipitation with variation of the calcinationtemperature from 400 °C to 800 °C. It is shown that the catalyst calcined at 650-700 °C exhibits the highest activit...

    O. A. Bulavchenko, Z. S. Vinokurov, V. P. Konovalova… in Journal of Structural Chemistry (2022)

  2. No Access

    Article

    STUDY OF THERMAL CO-DECOMPOSITION OF MANGANESE AND CERIUM OXALATES IN AIR AND IN INERT MEDIA

    Controlled thermal decomposition of oxalate salts is a promising method for the preparation of highly dispersed materials. In this work, co-decomposition of Mn and Ce salts is studied upon variations of the ca...

    O. A. Bulavchenko, Z. S. Vinokurov, O. A. Nikolaeva… in Journal of Structural Chemistry (2021)

  3. No Access

    Article

    Phase Transformations in the Mn–Ga–O System Depending on the Preparation Conditions

    Manganese-gallium samples with cation ratios Mn:Ga = 1:2, 1.5:1.5, and 2:1 are synthesized by coprecipitation with subsequent annealing in air in a temperature range 600–1200 °C. Powder XRD, TEM, and BET metho...

    O. S. Venediktova, O. A. Bulavchenko, T. N. Afonasenko… in Journal of Structural Chemistry (2018)

  4. No Access

    Article

    High-Temperature X-Ray Diffraction Investigation of the Decomposition Process in Manganese-Gallium Spinel Mn1.5Ga1.5O4

    The stability of spinel-type mixed Mn1.5Ga1.5O4 oxide prepared in an inert medium (1000 °C, Ar) is studied by thermogravimetry and high-temperature X-ray diffraction in air in a wide temperature range 30–1000 °C....

    O. S. Venediktova, O. A. Bulavchenko, P. G. Tsyrulnikov… in Journal of Structural Chemistry (2018)

  5. No Access

    Article

    Chemical and structural transformations in manganese aluminum spinel of the composition Mn1.5Al1.5O4 during heating and cooling in air

    Single phase cubic spinel of the composition Mn1.5Al1.5O4 is synthesized. Its crystal structure refinement shows that 0.4Mn+0.6Al are in the octahedral sites and 0.7Mn+0.3Al are in the tetrahedral sites. High tem...

    O. A. Bulavchenko, S. V. Tsybulya, P. G. Tsyruls’nikov… in Journal of Structural Chemistry (2010)

  6. No Access

    Article

    High-temperature X-ray study of the formation and delamination of manganese-alumina spinel Mn1.5Al1.5O4

    The behavior of the manganese-alumina system with Mn:Al = 1:1 on heating in air and vacuum was studied. The starting samples were mixtures of β-Mn3O4, α-Mn2O3, and γ-Al2O3. On heating to 950°C in air, the samples...

    O. A. Bulavchenko, S. V. Tsybulya, S. V. Cherepanova… in Journal of Structural Chemistry (2009)