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Yekaterinburg, Russia

Filonova E.A.,Yeltsin Federal University | Skutina L.S.,Yeltsin Federal University | Medvedev D.A.,RAS Institute of High Temperature Electrochemistry
Inorganic Materials | Year: 2016

Sr2-x Ba x NiMoO6 and Sr2Ni1-y Zn y MoO6 mixed oxides with a double perovskite structure have been synthesized by pyrolyzing polymer-salt materials. The phase composition and structure of the samples have been determined at 298 K. The effect of temperature on the crystal structure of Sr1.75Ba0.25NiMoO6, Ba2NiMoO6, and Sr2Ni1-y Zn y MoO6 has been studied for the first time. The linear thermal expansion coefficients of Sr1.75Ba0.25NiMoO6, Ba2NiMoO6, and Sr2Ni1-y Zn y MoO6 have been determined at temperatures from 298 to 1163 K in air. © 2016 Pleiades Publishing, Ltd. Source


Petrovykh K.A.,RAS Institute of Solid State Chemistry | Rempel A.A.,RAS Institute of Solid State Chemistry | Kortov V.S.,Yeltsin Federal University | Buntov E.A.,Yeltsin Federal University
Inorganic Materials | Year: 2015

Manganese-doped zinc orthosilicate (Zn2SiO4:Mn) nanoparticles have been prepared using a sol-gel process followed by annealing. The doping level was varied widely: from 0.1 to 10 at % Mn. The average particle size of the as-prepared material was 20 nm. With increasing annealing temperature, the particle size increased, reaching 150 nm as evaluated by X-ray diffraction. The photoluminescence intensity in the material was shown to depend significantly on the phase composition of the samples, the degree of their crystallinity, and the doping level. © 2015 Pleiades Publishing, Ltd. Source


Filonova E.A.,Yeltsin Federal University | Dmitriev A.S.,Yeltsin Federal University
Inorganic Materials | Year: 2013

The crystal structure of the mixed oxide Sr2ZnMoO6 has been refined by powder neutron diffraction at 298 K. The temperature effect on the crystal structure of Sr2ZnMoO6 has been studied by X-ray diffraction. The oxide has been shown to undergo a phase transition at T = 670 K. The stability of Sr2ZnMoO6 in a reducing atmosphere has been assessed by thermogravimetry. The relative length change of Sr2ZnMoO6 has been determined by dilatometry in air in the temperature range 298-1273 K, and the linear thermal expansion coefficient of Sr2ZnMoO6 has been evaluated. The chemical compatibility of Sr2ZnMoO6 with Ce0.8Sm0.2O 2 - δ, Ce0.8Pr0.2O2 - δ, Zr0.85Y0.15O2 - δ, and La 0.88Sr0.12Ga0.82Mg0.18O 2.85 has been assessed. © 2013 Pleiades Publishing, Ltd. Source


Petrovykh K.A.,RAS Institute of Solid State Chemistry | Rempel A.A.,RAS Institute of Solid State Chemistry | Kortov V.S.,Yeltsin Federal University | Valeeva A.A.,RAS Institute of Solid State Chemistry | Zvonarev S.V.,Yeltsin Federal University
Inorganic Materials | Year: 2013

Zn2SiO4:Mn (willemite) nanoparticles ∼30 nm in size have been prepared by disintegrating microcrystalline willemite powder in a planetary ball mill. X-ray diffraction and scanning electron micros-copy characterization showed that ball milling of the Zn2SiO 4:Mn powder for 60 min or a longer time ensured complete disintegration of the microcrystalline material and that the crystal structure of the resultant nanoparticles was identical to that of the parent powder. © 2013 Pleiades Publishing, Ltd. Source


Kalinina E.G.,Ural Federal University | Lyutyagina N.A.,Yeltsin Federal University | Safronov A.P.,Yeltsin Federal University | Buyanova E.S.,Yeltsin Federal University
Inorganic Materials | Year: 2014

La0.7Sr0.3MnO3-δ (LSM) cathode materials have been prepared through pyrolysis of liquid precursors and by solid-state reaction. We examined the effect of the cathode material synthesis procedure on the growth of thin films of a solid electrolyte based on Y 2O3-stabilized ZrO2 (YSZ) nanopowder with an average geometric size of 10.9 nm on a dense surface of model cathodes by electrophoretic deposition. Using electron microscopy, BET surface area measurements, X-ray diffraction, thermal analysis, and dilatometry, we investigated the structure, specific surface area, phase composition, thermal properties, and sintering-induced volume changes of cathode materials differing in prior history. The results demonstrate that the starting cathode materials differed markedly in properties, but the cathodes produced by sintering them were identical in phase composition: they consisted entirely of a rhombohedral phase. The room-temperature electrical conductivity of the cathodes produced by solid-state reaction was 0.231 ± 0.01 S/cm, exceeding that of the cathodes produced through pyrolysis by an order of magnitude. © 2014 Pleiades Publishing, Ltd. Source

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