Results 211 to 220 of about 35,130 (246)
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Phase transition temperature of ZrO2-Y2O3 solid solutions (2.4–6 mol% Y2O3)
Solid State Ionics, 1997The Tss + Fs → Ts phase transition temperature of ZrO2-Y2O3 solid solutions containing 2.4–6 mol% Y2O3 was investigated on the basis of the electrical conductance data obtained from sintered samples. The above phase transition temperature t (°C) could be expressed as a function of the Y2O3 content X (mol%) as: t = −243.21871 {ln(lnX)}2−982.92793 {ln(ln
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Chemistry Letters, 2006
Abstract Y2O3 nanocrystals of tunable morphology and size have been successfully synthesized; the mobility of surface oxygen species on Y2O3 nanocrystals is found, for the first time, to increase with the decrease of the crystal size and to significantly affect the catalytic performances of Ni/Y2O3 catalysts for oxidative steam reforming
Sun, G., Hidajat, K., Kawi, S.
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Abstract Y2O3 nanocrystals of tunable morphology and size have been successfully synthesized; the mobility of surface oxygen species on Y2O3 nanocrystals is found, for the first time, to increase with the decrease of the crystal size and to significantly affect the catalytic performances of Ni/Y2O3 catalysts for oxidative steam reforming
Sun, G., Hidajat, K., Kawi, S.
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Preparation and conductivity of Yb2O3–Y2O3 and Gd2O3–Y2O3 co-doped zirconia ceramics
Solid State Ionics, 2008Abstract A suspension stabilizer-coating technique was employed to prepare x mol% Yb2O3 or Gd2O3 (x = 1.0, 2.0, 3.0 and 4.0) co-stabilized 1.0 or 2.0 mol% Y2O3 doped ZrO2 nanopowders (xYb1Y, xYb2Y, xGd1Y). Fully dense Yb2O3/Gd2O3 and Y2O3 co-doped ZrO2 ceramics were obtained by means of pressureless sintering in air at 1450 °C.
Yanmei Kan +5 more
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Nano/Micro-Laminated (ZrO2–Y2O3)/(Al2O3–Y2O3) Composite Coatings and Their Oxidation Resistance
Oxidation of Metals, 2007Nano/micro-laminated (ZrO2–Y2O3)/(A12O3–Y2O3) composite coatings were deposited onto an Fe–25Cr–7Ni–N alloy substrate by using alternate electrochemical and sintering processes. The thickness of each layer was in the range of 80–500 nm. Experimental results indicated that the multi-laminated coatings were more effective in providing oxidation ...
Mingming Yao +3 more
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2020
Formation of Zr02-5 wt.% Y20 3 nanostructured powders in glycine-nitrate combustion synthesis was investigated and the effect of "glycine-to-N03" ratio and heating method on the reaction product composition and particle morphology studied. Ammonium nitrate additive was used to optimize the regime of the process.
Ustvuzhaninova, I. A. +3 more
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Formation of Zr02-5 wt.% Y20 3 nanostructured powders in glycine-nitrate combustion synthesis was investigated and the effect of "glycine-to-N03" ratio and heating method on the reaction product composition and particle morphology studied. Ammonium nitrate additive was used to optimize the regime of the process.
Ustvuzhaninova, I. A. +3 more
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Phase Relations along the Y2O3–CuWO4Join in the Y2O3–WO3–CuO System
Inorganic Materials, 2001The phase relations in the Y2O3–WO3–CuO system were studied by x-ray diffraction and thermal analysis. The results were used to construct the 800°C section of the phase diagram. Based on the new and earlier data on the liquidus relations, the section through the Y2O3–WO3–CuO phase diagram along the Y2O3–CuWO4join was mapped out.
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Combustion synthesis of Y2O3 and Yb–Y2O3
Journal of Materials Processing Technology, 2008R.V. Mangalaraja +6 more
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2011
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?????? ?????????????????????????? Fe3O4???Y2O3???Fe3O4 ???????????????????? ?????????????????????? ?????????????????????? ??????????????????????????, ???????????????????????????????????????? ?? ?????????????????????? ???????????? ???????????????????? ???? ???????????????? ????????, ?????????????????????????? ???????????????????? ?????????????????? ?????
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Activation energy for electrical conduction of Y2O3-stabilized ZrO2 containing 8 mol% Y2O3
Solid State Ionics, 1996Abstract In order to investigate the time-dependent change of activation energy for electrical conduction of Y 2 O 3 -stabilized ZrO 2 containing 8 mol% Y 2 O 3 , the electrical conductance of a sintered sample was measured in the range of 1090-1110°C over a period of 114 days.
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