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  1. No Access

    Article

    Main Trends in the Development of Microwave Dielectric Materials for Cellular Communication Devices: A Review

    The requirements for high-quality microwave (MW) dielectrics, which are used in the development of cellular communication devices (radio filters, solid-state generators, etc.) for the transition from 3G to 5G ...

    A. G. Belous, O. I. V’yunov in Theoretical and Experimental Chemistry (2023)

  2. No Access

    Article

    Influence of Solvent on Stability and Electrophysical Properties of Organic–Inorganic Perovskites Films CH3NH3PbI3

    The influence of DMF and DMSO solvents on the properties of organic–inorganic perovskite films obtained at the ratio of starting reagents PbI2:CH3NH3I = 1:2 was studied. It was found that a dense film is formed f...

    P. V. Torchyniuk, O. I. V’yunov, L. L. Kovalenko… in Theoretical and Experimental Chemistry (2021)

  3. No Access

    Article

    Preparation and Properties of Films of Organic-Inorganic Perovskites MAPbX3 (MA = CH3NH3; X = Cl, Br, I) for Solar Cells: A Review

    The latest results in the field of design of and research on organic-inorganic perovskites are summarized. The influence of chemical and physical factors, in particular the ratio of starting reagents, such as ...

    A. G. Belous, A. A. Ishchenko, O. I. V’yunov… in Theoretical and Experimental Chemistry (2021)

  4. No Access

    Chapter and Conference Paper

    Composite Ultrafiltration Membrane Incorporated with Dispersed Oxide Nanoparticles

    Organic-inorganic membranes containing the nanoparticles of hydrated and BaFe12O19 magnetic nanoparticles were obtained. The nanoparticles were inserted into polymer matrices, they form aggregates, a size of ...

    L. M. Rozhdestvenska, O. I. V’yunov… in Nanomaterials in Biomedical Application an… (2020)

  5. No Access

    Article

    Influence of Synthesis Conditions on the Morphology and Spectral-Luminescent Properties of Films of Organic-Inorganic Perovskite CH3NH3PbI2.98Cl0.02

    The influence of the synthesis conditions (rotation speed used for spin-coating deposition of the film, film drying temperature, and the ratio of the PbI2 and CH3NH3I reactants in solutions) on the microstructure...

    A. G. Belous, O. I. V’yunov, S. D. Kobylianska… in Russian Journal of General Chemistry (2018)

  6. No Access

    Article

    Effect of impurities on the electrical properties of the defect perovskite Li0.33La0.57TiO3

    A perovskite phase with the composition Li0.33La0.57TiO3 modified with up to 7 wt % Bi2O3, SiO2, Li3PO4, or Li3BO3 has been prepared by solid-state reactions. The samples in the LLTO–Li3PO4, LLTO–Bi2O3, and LLTO–...

    B. A. Lineva, S. D. Kobylyanskaya, L. L. Kovalenko, O. I. V’yunov… in Inorganic Materials (2017)

  7. Article

    Open Access

    Semi-oxalate synthesis of (1−x)BaTiO3−xM0.5Bi0.5TiO3 (M = Li, Na, K) PTCR materials

    (1−x)BaTiO3–xM0.5Bi0.5TiO3 (M = Li, Na, K) solid solutions were prepared using BaTiO3 pre-synthesized by oxalate method. The stability limits of (1−x)BaTiO3–xLi0.5Bi0.5TiO3 solid solutions have been established. ...

    T. A. Plutenko, O. I. V’yunov, A. G. Belous… in Journal of Advanced Ceramics (2016)

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  8. No Access

    Article

    Mass spectrometry determination of the properties of the fullerite consisting of a C60-C70 mixture

    The transformations of the crystal structure of the fullerite consisting of a mixture of C60 and C70 that occur in the course of heating during pulsed laser irradiation are described using experimental results, t...

    M. M. Kasumov, O. I. V’yunov in Technical Physics (2015)

  9. No Access

    Article

    Formula for determining the surface temperature of the fullerite consisting of a C60-C70 mixture from a mass spectrum

    A calculation is used to show that the kinetic energy of particles in the sublimation flux of the fullerite consisting of a mixture of C60 and C70 that is caused by a pulsed laser beam is significantly higher tha...

    M. M. Kasumov, O. I. V’yunov in Technical Physics (2015)

  10. No Access

    Article

    Ionic and electronic conductivities of yttria- and scandia-stabilized zirconia

    We report a study and comparative analysis of the medium-temperature (850–1000°C) ionic and total conductivities of zirconia stabilized by yttriaand scandia-based mixed oxides. Zirconia stabilized by combined ...

    A. G. Belous, O. I. V’yunov, V. Gunes, O. Bohnke in Inorganic Materials (2014)

  11. No Access

    Article

    Synthesis of thin-film electrodes based on LiPON and LiPON-LLTO-LiPON

    Thin lithium-conducting amorphous films of lithium phosphorus oxynitride (LiPON) are synthesized by high-frequency (HF) magnetron sputtering. The effect of sputtering conditions (HF power, support temperature,...

    A. G. Belous, O. I. V’yunov, L. L. Kovalenko… in Russian Journal of Electrochemistry (2014)

  12. No Access

    Article

    Synthesis and electrical properties of (BaTiO3)1 −x (K0.5Bi0.5TiO3) x solid solutions

    (BaTiO3)1 − x (K0.5Bi0.5TiO3) x solid solutions exhibiting positive temperature coefficient of resistance behavior have been prepared using BaTiO3 presyn...

    T. A. Plutenko, O. I. V’yunov, A. G. Belous in Inorganic Materials (2012)

  13. No Access

    Article

    Preparation and electrical properties of (1 − x)(Ba,Y)TiO3 · xPbTiO3 materials containing low-melting B2O3-PbO-SiO2 glass additions

    We have studied the electrical properties of (1 − x)(Ba,Y)TiO3 · xPbTiO3-based solid solutions containing different percentages of low-melting glass. The materials were prepared by solid-state reactions, sintered...

    T. A. Plutenko, O. I. V’yunov, O. Z. Yanchevskii, A. G. Belous in Inorganic Materials (2011)

  14. No Access

    Article

    Effect of isovalent substitution on the structure and ionic conductivity of Li0.5 − y Na y La0.5□Nb2O6

    We have synthesized Li0.5 − y Na y La0.5□Nb2O6 defect perovskite solid solutions with 0 ≤ y ≤ 0.5. Their structure has been shown to undergo partial disor...

    A. G. Belous, O. N. Gavrilenko, O. I. V’yunov, S. D. Kobilyanskaya… in Inorganic Materials (2011)

  15. No Access

    Article

    Intercalation processes influence the structure and electrophysical properties of lithium-conducting compounds having defect perovskite structure

    The structural features and electrophysical properties of lithium-conducting compounds having defect perovskite structure based on Li0.5La0.5Nb2O6 and Li0.5La0.5TiO3 were studied using X-ray diffraction and synch...

    O. I. V’yunov, O. N. Gavrilenko, L. L. Kovalenko… in Russian Journal of Inorganic Chemistry (2011)

  16. No Access

    Article

    Preparation and electrical properties of Pb(Mg1/3Nb2/3)O3-PbTiO3 solid solutions

    Ceramic samples of lead magnesium niobate (PMN) and (1 − x)Pb(Mg1/3Nb2/3)O3−xPbTiO3 (PMN-PT) solid solutions with x = 0, 0.05, 0.10, and 0.30 have been prepared by solid-state reactions, and their structural, ele...

    A. G. Belous, O. Z. Yanchevskii, O. I. V’yunov, N. V. Mazhara… in Inorganic Materials (2008)

  17. No Access

    Article

    Structural, electrical, and magnetic properties of La0.7Ca0.3 − x Na x MnO3 ± γ solid solutions

    La0.7Ca0.3 − x Na x MnO3 ± γ (LCNM) solid solutions with x = 0, 0.04, 0.06, 0.08, and 0.10 have been synthesized (rhombohedral structure, sp. gr. R ...

    O. Z. Yanchevskii, A. I. Tovstolytkin, O. I. V’yunov, A. G. Belous in Inorganic Materials (2008)

  18. No Access

    Article

    BaTi1−x SnxO3 Solid Solutions: Solid-Phase and Sol-Gel Syntheses and Characterization

    Ba(Ti1−x Snx)O3 solid solutions were synthesized by the sol-gel process and solid-phase reactions, and their electrophysical properties studied. SnCl4 · 5H2O, TiCl4, and BaCO3 were precursors in t...

    S. A. Solopan, A. G. Belous, O. I. V’yunov… in Russian Journal of Inorganic Chemistry (2008)

  19. No Access

    Article

    Effect of fluorine do** on the microstructure and electrical properties of barium-titanate-based ceramics

    The effect of partial fluorine substitution for oxygen on the properties of BaTiO3 has been studied using thermogravimetry, x-ray diffraction, electron microscopy, complex impedance measurements, and diffuse refl...

    O. I. V’yunov, A. G. Belous, L. L. Kovalenko, V. F. Zinchenko… in Inorganic Materials (2007)

  20. No Access

    Article

    Substrate effect on the properties of La0.775Sr0.225MnO3 films

    La0.775Sr0.225MnO3 films have been produced by screen printing on various substrates (Al2O3, BaTi0.85Zr0.11Sn0.04O3, Ba0.996Y0.004TiO3, Ba0.996Y0.004TiO3 + 0.04%Mn, and Ba0.996Y0.004Ti0.65Sn0.35O3), and their ele...

    S. A. Solopan, O. I. V’yunov, A. I. Tovstolytkin, L. L. Kovalenko… in Inorganic Materials (2007)

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