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Vorobyova A. A. Shilov A. I. Spiridonov F. M. Knotko A. V. Danilovich I. L. Vasiliev A. N. Morozov I. V. 《Russian Chemical Bulletin》2020,69(4):704-711
Russian Chemical Bulletin - Basic copper(ii) dihydroxoborate Cu2{BO(OH)2}(OH)3 contains infinite chains consisting of [CuO4] squares that are linked together by sharing opposite edges, due to which... 相似文献
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Murzakhanov F. F. Mamin G. V. Goldberg M. A. Knotko A. V. Gafurov M. R. Orlinskii S. B. 《Russian Journal of Coordination Chemistry》2020,46(11):729-737
Russian Journal of Coordination Chemistry - Radiation-induced impurity nitrogen centers ( $${\text{NO}}_{3}^{{2 - }}$$ ) in nanosized powders of synthetic hydroxyapatite are studied by pulse EPR... 相似文献
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A. V. Knotko A. V. Garshev M. N. Pulkin V. I. Putlyaev S. I. Morozov 《Physics of the Solid State》2004,46(3):424-429
The oxidation kinetics of Bi1.3Pb0.8Sr2Ca0.8Y0.2Cu2O8+δ solid solutions at different temperatures and \(p_{O_2 } = 0.21\) atm is investigated by thermogravimetry. The results obtained are compared with the previously studied oxidation kinetics of Bi1.3Pb0.8Sr2Ca0.8Y0.2Cu2O8+δ solid solutions. It is found that the substitution of yttrium for calcium leads to an appreciable retardation of the initial oxidation stage associated with the oxygen diffusion. The phonon spectra of the solid solutions are examined using inelastic neutron scattering on a DIN-2PI direct-geometry spectrometer. The high-frequency (>50 meV) phonon densities of states for yttrium-containing and yttrium-free solid solutions are analyzed. The possible model is proposed for a correlation between the differences observed in the high-frequency phonon densities of states attributed to the vibrations of oxygen atoms and the differences in the oxidation kinetics of the solid solutions under consideration. 相似文献
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A.?V.?ShlyakhtinaEmail author L.?G.?Shcherbakova A.?V.?Knotko A.?V.?Steblevskii 《Journal of Solid State Electrochemistry》2004,8(9):661-667
The ordering processes in Ln2Ti2O7 (Ln=Lu, Yb, Tm) are studied by X-ray diffraction, thermal analysis, infrared absorption (IR) spectroscopy, and electrical conductivity measurements. The coprecipitation method followed by freeze-drying was used for Ln2Ti2O7 synthesis. The region of low-temperature fluorite phase existence is 600 °C<T<740 °C. The low-temperature fluorite–pyrochlore phase transition in Ln2Ti2O7 takes place at ~740–800 °C. Ln2Ti2O7 (Ln=Lu, Yb, Tm) have the structure of disordered pyrochlore with antisite Ln–Ti defects at 800 °C<T<1,100 °C.The high-temperature pyrochlore–fluorite transformation takes place in Tm2Ti2O7, Yb2Ti2O7, and Lu2Ti2O7 in air at T>1,600 °C. The conductivity values are 5·10–3 S/cm for Tm2Ti2O7, 6·10–3 S/cm for Yb2Ti2O7, and 10–2 S/cm for Lu2Ti2O7 at 740 °C. This order–disorder transition leads to a 2 orders of magnitude conductivity growth and a 10–30 times permittivity increase in Ln2Ti2O7 samples obtained at 1,700 °C.Presented at the OSSEP Workshop Ionic and Mixed Conductors: Methods and Processes, Aveiro, Portugal, 10–12 April 2003 相似文献
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