Results 231 to 240 of about 3,531,769 (312)
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Carbochlorination of yttrium oxide
Thermochimica Acta, 2010Abstract The reaction of chlorination of a mixture composed by Y 2 O 3 and sucrose carbon was studied by thermogravimetry over a temperature range of 550–950 °C. The reaction proceeds through several successive stages. The first of them is the formation of solid yttrium oxychloride (YOCl) and subsequently the YOCl is carbochlorinated to produce YCl ...
J.P. Gaviría, A.E. Bohé
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Electronic structure of yttrium oxide
Physical Review B, 1990The electronic structure of stoichiometric Y{sub 2}O{sub 3} is studied both theoretically and experimentally. X-ray absorption, performed through total-yield measurements at the {ital K} and {ital L}{sub II} edges of yttrium atoms and the {ital K} edge of oxygen atoms, through total-yield measurements has given access to empty states of various orbital
, Jollet +4 more
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Thin film studies of yttrium, yttrium hydrides and yttrium oxide
Journal of Physics F: Metal Physics, 1978Electron diffraction work has been carried out on yttrium films prepared in a vacuum of 5*10-7 Torr during evaporation. The crystal structure of thin yttrium films (300 AA thick or less) is mainly face-centred-cubic with a0=5.25+or-0.05 AA which can be attributed to cubic yttrium dihydride.
A E Curzon, O Singh
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Metastability of yttrium oxides
Surface and Coatings Technology, 1993Abstract Metastable yttrium oxide films are synthesized using reactive sputter deposition. The yttrium concentration of the as-deposited film is found to vary as a function of the sputter deposition rate. In addition to the synthesis of the cubic equilibrium phase Y 2 O 3 , oxide compounds can be formed with 40–80 at. % Y.
A.F. Jankowski +4 more
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Technical Physics, 2008
Pulsed cathodoluminescence of pure and neodymium-activated Y2O3 ceramic and materials used for its synthesis (commercial Y2O3 micropowder and nanopowder obtained from it by laser evaporation) is investigated in a wavelength range of 350–850 nm. In the micropowder, four series of narrow electron-vibration bands of intrinsic luminescence centers are ...
V. V. Osipov +2 more
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Pulsed cathodoluminescence of pure and neodymium-activated Y2O3 ceramic and materials used for its synthesis (commercial Y2O3 micropowder and nanopowder obtained from it by laser evaporation) is investigated in a wavelength range of 350–850 nm. In the micropowder, four series of narrow electron-vibration bands of intrinsic luminescence centers are ...
V. V. Osipov +2 more
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Transparent yttrium oxide ceramics
Materials Research Bulletin, 1967Abstract Transparent discs of yttrium oxide, one centimeter in diameter by several millimeters thick, have been produced by hot forging under vacuum at 950°C and 10,000–12,000 psi for 48 hours. Lithium fluoride, required to produce full transparency, is eliminated during the sintering process.
R.A. Lefever, John Matsko
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Nanostructured Yttrium Oxide Obtained by Hydrolysis of Yttrium Sulfate
Materials Science Forum, 2019Modern functional metal oxide materials are based upon the use of nanostructured particles. In recent years materials on the basis of yttrium oxide find ever-widening application. The properties of yttrium oxide depend heavily on precursors and synthesis conditions. One of the poorly investigated precursors is yttrium sulfate.
Viacheslav V. Avdin +2 more
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Anion exchange separation and determination of yttrium in uranium oxide — Yttrium oxide mixture
Journal of Radioanalytical Chemistry, 1983A procedure has been developed for quantitative separation of yttrium from uranium by anion exchange from nearly saturated NH4Cl solution in 0–2N HCl medium. Apparently no organic matter is leached out during the separation as yttrium could be determined by EDTA titration without resorting to fuming with perchloric acid before titration.
G. H. Rizvi +3 more
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Self-diffusion of yttrium in monocrystalline yttrium oxide: Y2O3
Journal of Solid State Chemistry, 1980Abstract Yttrium self-diffusion in monocrystalline yttrium oxide (Y2O3) is studied by means of the classical radio tracer technique. The few reliable diffusion data obtained in the temperature range 1600–1700°C lead to the following diffusion coefficient D=3.5×10 −9 exp − 72 RT ( kcal/mole ) m 2 sec −1 ...
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, 2020
The wear resistance coating alloy Tribaloy T-900 modified by aluminium and yttrium was prepared by mechanical alloying. The hot corrosion behaviour of modified and unmodified alloys was investigated at 900 °C.
A. Rehman +6 more
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The wear resistance coating alloy Tribaloy T-900 modified by aluminium and yttrium was prepared by mechanical alloying. The hot corrosion behaviour of modified and unmodified alloys was investigated at 900 °C.
A. Rehman +6 more
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