Оксидні матеріали електронної техніки – отримання, властивості, застосування (OMEE-2012). – 2012 р.
Permanent URI for this collectionhttps://ena.lpnu.ua/handle/ntb/14991
У збірнику подані розширені тези доповідей Міжнародної наукової конференції "Оксидні матеріали електронної техніки - отримання, властивості, застосування" (OMEE-2012). Конференція присвячена актуальним проблемам технології отримання та дослідження структурних , оптичних, магнітних та електрофізичних властивостей оксидних матеріалів, а також можливості їх практичного застосування у пристроях електронної техніки та розроблення нових функціональних пристроїв на їх основі. Для наковців та аспірантів, які працюють в галузі фізики оксидних матеріалів.
Оксидні матеріали електронної техніки – отримання, властивості, застосування (ОМЕЕ – 2012) : збірник матеріалів міжнародної наукової конференції, 3-7 вересня 2012 року, Львів, Україна / Міністерство освіти, науки, молоді та спорту України, Національний університет “Львівська політехніка”. – Львів : Видавництво Львівської політехніки, 2012. – 305 c.
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Item Зміст до "International Conference on Oxide materials for electronic engineering – fabrication, properties and applications"(Видавництво Львівської політехніки, 2012)Item Influence of NiO reduction on microstructure and properties of porous Ni-ZrO2 substrates(Видавництво Львівської політехніки, 2012) Podhurska, V.; Vasyliv, B.The changes of microstructure, strength, electrical conductivity and fracture micromechanisms of porous YSZ–Ni substrate as anode-supported solid oxide fuel cell (SOFC) material after the treatment in high temperature (600°C) reducing and oxidizing environments have been studied.Item Structure and properties of SOFC electrode materials made from nanopowders(Видавництво Львівської політехніки, 2012) Glazunov, F. I.; Danilenko, I. A.; Konstantinova, T. E.; Glazunova, V. A.; Volkova, G. K.; Burhovetsky, V. V.SOFC composite materials were prepared from nanopowder mixtures of yttria stabilized zirconia - nickel oxide as anode and yttria stabilized zirconia - lanthanum manganite as cathode. The influence of particle size, pore former and sintering temperature on structure and properties of the electrode materials were investigated. The optimal conditions of full reduction of nickel oxide in anode materials were found. Anode material of 55 MPa strength and 38 % porosity was obtained. A SOFC single cell of obtained composite nanopowders was made and tested.Item On the dependence of Ionic conductivity of ScSZ electrolytes on temperature of their sintering(Видавництво Львівської політехніки, 2012) Kyrpa, O.; Vasylyev, O.; Brychevs’kyi, M.; Pryshchepa, E.; Smirnova, A.The dependencies of ionic oxygen conductivity of 10Sc1CeSZ electrolytes made of different zirconia powders those differ by their impurities and production technologies, and sintered in air at different temperatures after uniaxial pressing are analyzed in terms of their Arrhenius equations in 400-900oC temperature range. Deviation from a typical linear dependence of conductivity on temperature that is the most clearly visible in the electrolyte made of the purest powder is observed as a kink on the temperature dependency. A position of the kink point is determined by powder properties and is practically independent on temperature of powder sintering.Item Fractal analysis of surface topography of solid oxide fuel cell materials(Видавництво Львівської політехніки, 2012) Suchaneck, G.; Ponomareva, A. A.; Brychevskyi, M.; Brodnikovskyi, I.; Vasylyev, O.; Gerlach, G.In this work, we investigate the hierarchical surface topography of solid oxide fuel cell electrolytes consisting of zirconia stabilized with 10% Sc2O3 and 1% CeO2 (1Ce10ScSZ) synthesized at 1300-1400 °C and anodes of 60 wt% 1Ce10ScSZ and 40 wt% NiO synthesized at 1250 to 1550 °C. The fractal dimension of AFM images of the films was determined by the cube counting method, the triangulation method and by means of the PSD slope at large wavenumbers. RMS roughness and correlation lengths were derived from the fit to the model PSD.Item Solid-state catalysts based on bentonites and Pd(II)-Cu(II) complexes for low-temperature carbon monoxide oxidation(Видавництво Львівської політехніки, 2012) Rakitskaya, T. L.; Kiose, T. A.; Zryutina, A. M.; Gladyshevskii, R. E.; Truba, A. S.; Vasylechko, V. O.; Demchenko, P. Yu.; Gryschouk, G. V.; Volkova, V. Ya.The results of testing of Pd(II)-Cu(II)/Bent catalyst samples in the reaction of CO oxidation with air oxygen are presented. Bentonites from three Ukrainian deposits: Gorbskoye, Dashukovskoye, and Kirovogradskoye are used as supports. Natural bentonites, their modified forms, and the catalysts have been characterized by X-ray diffraction phase analysis, FT-IR spectroscopy, and chemical analysis. It has been found that the activity of Pd(II)-Cu(II)/Bent catalysts increases with increasing amorphous silica content and with decreasing pH of their water suspensions.Item Structure and gas sensitivity of the ZnO sensor of ethanol(Видавництво Львівської політехніки, 2012) Tsizh, B.; Aksimentyeva, O.; Lazorenko, V.; Chokhan, M.We studied the influence of substrate nature and type of doping on the structure and sensor properties of thin films of ZnO, obtained on the surface of glass, quartz, sital, leuco-sapphire and oxidized silicon by thermo vacuum deposition. With X-ray investigation it shown that the obtained films consist of nanocrystalline zinc oxide, regardless of the nature of the surface, and the best structural perfection characterized ZnO film on the surface of the quartz and glass. The sensitive properties of zinc oxide films to ethanol vapors greatly improved by introducing of doping impurities (Al or In), a highest sensitivity to ethanol was detected for the films of ZnO − Al on the quartz substrate. The proposed sensor can be used to monitor gas environments in the food industry and in the evaluation of alcohol in humans breathing.Item Influence of manganese oxides on the optical absorption and photocatalytic activities of titanium dioxide(Видавництво Львівської політехніки, 2012) Kernazhitsky, L.; Shymanovska, V.; Gavrilko, T.; Naumov, V.; Khalyavka, T.; Kshnyakin, V.Nanocrystalline titanium–manganese mixed oxides (TMMO) with Mn content of 13–16 at. % were first synthesized by manganese hydroxide precipitation on anatase or rutile particles. UV–vis absorption spectra were investigated in 2.4–6.0 eV region and revealed that compared with pure TiO2 the presence of manganese oxides results in an increase of the absorption intensity and significant red shift of the TMMO absorption edge. Photocatalytic activity of pure TiO2, Mn2+ doped TiO2 and TMMO during the photocatalytic decomposition of the safranine dye under UV irradiation was studied. A great improvement of photocatalytic activity is registered for Mn2+-doped TiO2 (anatase and rutile), and rutile-based TMMO sample.Item Lead-free high-temperature barium titanate- based PTCR ceramics and its electrical properties(Видавництво Львівської політехніки, 2012) Plutenko, T. A.; V’yunov, O. I.The (1-x)BaTiO3-x{Na,K}0.5Bi0.5TiO3 solid solutions have been synthesized by solid-state reaction technique. The parameters of the crystal structure of the ceramic samples were determined by means of Rietveld fullprofile X-ray analysis. With increasing x, the values of ρmax and ρmin increase due to the growth of potential barrier at grain boundaries. It has been found that in (1-x)BaTiO3 x{Na,K}0.5Bi0.5TiO3 system the grain boundary and the outer layer region make a contribution to the PTCR effect.Item Oxygen ionic transport in brownmillerite-type Ca2Fe2O5±d and calcium ferrite-based composites(Видавництво Львівської політехніки, 2012) Shaula, A. L.; Kolotygin, V. A.; Naumovich, E. N.; Waerenborgh, J. C.; Pivak, Y. V.; Kharton, V. V.The present work was centered on the studies of oxygen permeability, mixed conductivity, dilatometric behavior, crystal structure and microstructure of Ca2Fe2O5±d and Ca2(Fe,M)2O5±d (M = Co, Mn) solid solutions, and dualphase Ca2Fe2O5 – Ce0.9Gd0.1O1.95 composites. The anisotropic oxygen-ion diffusion in calcium ferrite lattice was simulated using molecular dynamics and atomistic modeling techniques. The computer simulations results were analyzed in light of the experimental data on ionic conduction and thermodynamic stability.