Центральная Научная Библиотека УрО РАН

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   C 65


    Cobalt-containing catalytic systems alloyed with rare and rare-earth metals as catalysts for synthesis of hydrocarbons from CO and H2 [Electronic resource] / A. S. Seleznev, L. A. Petrov, O. N. Chupakhin, V. I. Kononenko, I. A. Chupova, A. V. Ryabina // Russian Journal of Applied Chemistry. - 2009. - Vol. 82, № 5. - P820-825

ББК 54
Рубрики: ХИМИЧЕСКИЕ НАУКИ
Аннотация: To improve cobalt-containing catalytic systems for synthesis of hydrocarbons from carbon monoxide and hydrogen (Fischer-Tropsch synthesis), supports based on ultradispersed alloys of aluminum with rare and rare-earth metals (G, Ce, Sm) were obtained and studied. The catalytic activity parameters of the new catalysts were determined

\\\\Expert2\\nbo\\Russian Journal of Applied Chemistry\\2009, v. 82, N 5, p.820.pdf
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   U 67


    Upconversion luminescence in Er3+/Yb3+ codoped Y2CaGe4O12 [Electronic resource] / I. I. Leonidov, V. G. Zubkov, A. P. Tyutyunnik, N. V. Tarakina, L. L. Surat, O. V. Koryakova, E. G. Vovkotrub // Journal of Alloys and Compounds. - 2011. - Vol. 509, № 5. - P1339-1346. - Bibliogr. : p. 1345-1346 (52 ref.)

ББК 54
Рубрики: ХИМИЧЕСКИЕ НАУКИ
Аннотация: Calcium yttrium tetrametagermanates Y2CaGe4O12 doped with Er3+ and Er3+/Yb3+ reveal upconversion emission in visible spectral range under near-infrared excitation, ex = 980 nm. For the solid solution ErxY2?xCaGe4O12 concentration dependencies for the green and red lines of the visible emission around 526 nm (2H11/2 4I15/2), 545 nm (4S3/2 4I15/2) and 670 nm (4F9/2 4I15/2) show the optimal value for the sample x = 0.2. The power dependence of the visible luminescence measured at room temperature in the low-power limit indicates two-photon upconversion process. Direct intensification of the upconversion emission signals has been achieved by ytterbium sensitizing. The other upconversion excitation mechanism in Y2CaGe4O12:Er3+ is discussed for an 808 nm incident laser irradiation. A scheme of excitation and emission routes involving ground/excited state absorption, energy transfer upconversion, nonradiative multiphonon relaxation processes in trivalent lanthanide ions in Y2CaGe4O12:Er3+ and Y2CaGe4O12:Er3+, Yb3+ has been proposed. Conditions for visible emission occurrence under quasi-resonance ex = 1064 nm excitation depending on pump power values are considered. In the low-power regime only near-infrared emission caused by the transition 4I13/2 4I15/2 in erbium ions has been detected

\\\\Expert2\\nbo\\Journal of Alloys and Compounds\\2011, v.509, N 5, p.1339.pdf
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   T 44


    The effect of super- and nanodispersed powders of zinc and copper alloys in plastic greases on the structure and triboengineering properties of steel surfaces / L. V. Zolotukhina, A. Ya. Zapevalov, S. V. Zhidovinova, I. G. Arefiev, B. R. Gelchinsky // Journal of Friction and Wear. - 2011. - Vol.32, №2. - С. 107-112

ББК 54
Рубрики: ХИМИЧЕСКИЕ НАУКИ
Кл.слова (ненормированные):
LUBRICATING COMPOSITIONS -- TRIBOENGINEERING PROPERTIES -- STEEL SURFACES
Аннотация: It is demonstrated that the wear rate of tribocouples can be reduced significantly with the use of lubricating compositions obtained by added super- and nanodispersed zinc or Cu-Sn powders to the Lithol-24 plastic grease. When the superdispersed powders of copper alloys interact with tribosurfaces, the copper and tin diffuse into the base metal, producing secondary composite superdispersed structures. The alloyed elements penetrate into the base metal more deeply if the powder contains the nanodispersed fraction. The films of polyfluorinated oligomers based on particles of zinc and copper alloy powders with functional substitutes reduce substantially the friction coefficient of kinematic couples when they are lubricated with these lubricating compositions and expand the temperature range of application of plastic greases

\\\\Expert2\\nbo\\Journal of Friction and Wear\\2011, v. 32, p. 107-112.pdf
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