18 Result(s)

Article

Protic Oligosilsesquioxane Dicationic Ionic Liquids with Two Types of Ionic Sites in Organic Frame

A method of synthesis of oligomeric siloxane protic ionic liquids capable of condensation reactions has been developed as starting compounds in the obtaining proton exchange membranes for fuel cells. Their org...

V. V. Shevchenko, M. A. Gumenna, N. S. Klimenko… in Theoretical and Experimental Chemistry (2022)

Article

Anomalous Increase in Ionic Conductivity in Peo-Containing System Segmented Polyurethane – Segmented Oligourethane with LiClO₄

A method of obtaining a solid polymer electrolyte for lithium-ion batteries based on polyethylene oxide-containing (PEO) supramolecularly organized system segmented polyurethane – segmented oligourethane with ...

V. V. Shevchenko, A. G. Belous, A. V. Stryutsky… in Theoretical and Experimental Chemistry (2022)

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)

Article

Effect of impurities on the electrical properties of the defect perovskite Li_0.33La_0.57TiO₃

A perovskite phase with the composition Li_0.33La_0.57TiO₃ 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)

Article

Codo** of scandium-containing zirconia-based solid electrolytes with iron, cerium, and copper oxides

Codo** with iron, cerium, and copper oxides has been proposed as a means of improving the performance of scandium-containing zirconia-based solid electrolytes. We have examined three procedures for the synth...

O. Z. Yanchevskii, L. L. Kovalenko, A. G. Belous in Inorganic Materials (2016)

Article

Lithium–air cell with lanthanum–lithium titanate ceramic electrolyte

The La_0.56Li_0.33TiO₃ ceramic with the structure of defect perovskite and high conductivity of (2-4) × 10^–3 S cm^–1 at the room temperature is obtained. Ceramic electrolyte based on La_0.56Li_0.33TiO₃ is developed fo...

A. G. Belous, G. Ya. Kolbasov, E. I. Boldyrev… in Russian Journal of Electrochemistry (2015)

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)

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 Li_0.5La_0.5Nb₂O₆ and Li_0.5La_0.5TiO₃ 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)

Article

Control of radiation ellipticity by rotation of a plane-parallel crystal plate

P. S. Andreev, O. Yu. Pikul’, L. L. Kovalenko, M. A. Voityuk… in Russian Physics Journal (2008)

Article

Preparation and electrical properties of Pb(Mg_1/3Nb_2/3)O₃-PbTiO₃ solid solutions

Ceramic samples of lead magnesium niobate (PMN) and (1 − x)Pb(Mg_1/3Nb_2/3)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)

Article

BaTi_1−x Sn_xO₃ Solid Solutions: Solid-Phase and Sol-Gel Syntheses and Characterization

Ba(Ti_1−x Sn_x)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)

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)

Article

Substrate effect on the properties of La_0.775Sr_0.225MnO₃ films

La_0.775Sr_0.225MnO₃ films have been produced by screen printing on various substrates (Al₂O₃, BaTi_0.85Zr_0.11Sn_0.04O₃, Ba_0.996Y_0.004TiO₃, Ba_0.996Y_0.004TiO₃ + 0.04%Mn, and Ba_0.996Y_0.004Ti_0.65Sn_0.35O₃), and their ele...

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

Article

Electrical properties of BaTi_1−x M _x O₃ (M = Nb, Ta, Mo, W) ceramics

The electrical properties of BaTi_1−x M _x O₃ (M = Nb, Ta, Mo, W) ceramics (partial substitution of Group V (Nb, Ta) or VI (Mo, W) metals on the titanium si...

O. I. V’yunov, L. L. Kovalenko, A. G. Belous in Inorganic Materials (2006)

Article

Oxidation of reduced Y-doped semiconducting barium titanate ceramics

Oxidation-induced microstructural changes in reduced yttrium-doped barium titanate (Ba_{1 − x}Y _x Ti _{1 − x} ⁴⁺ Ti ...

O. I. V’yunov, L. L. Kovalenko, A. G. Belous, V. N. Belyakov in Inorganic Materials (2005)

Article

Oxidation of reduced Y-Doped semiconducting barium titanate ceramics

Oxidation-induced microstructural changes in reduced yttrium-doped barium titanate (Ba_1-xY_xTi _1-x ⁴⁺ Ti _x ³⁺ ...

O. I. V’yunov, L. L. Kovalenko, A. G. Belous, V. N. Belyakov in Inorganic Materials (2005)

Article

Effect of the Distribution of Manganese Ions on the Properties of Mn-Doped (Ba,Y)TiO₃ PTCR Ceramics

The electrical properties and microstructure of (Ba,Y)TiO₃ PTCR ceramics were studied. The results indicate that the Mn ions increase the intergranular barrier height and produce a high-resistance layer on the gr...

O. I. V'yunov, L. L. Kovalenko, A. G. Belous, V. N. Belyakov in Inorganic Materials (2003)

Article

Effect of Isovalent Ba-Site Substitutions on the Properties of (Ba_{1 – x – y} M _y Y _x )TiO₃(M = Ca, Sr, Pb) PTCR Ceramics

An approach is proposed for fabricating fine-grained, low-resistivity BaTiO₃-based PTCR ceramics via partial isovalent substitutions on the Ba site. The grain size of the ceramics thus prepared is shown to decrea...

A. G. Belous, O. I. V'yunov, L. L. Kovalenko, V. Buscaglia… in Inorganic Materials (2003)