Results 141 to 150 of about 613 (173)
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Air oxidation of yttrium and some yttrium-base alloys
Journal of the Less Common Metals, 1964Abstract An investigation was made of the air oxidation behavior of yttrium metal of 99.9% purity at temperatures between 500° and 1400°C. An oxide layer formed on the metal surface affords excellent protection against oxidation up to about 875°C but this film breaks down at higher temperatures, resulting in complete failure of the specimen within a ...
J.A. Haefling +2 more
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Compressive Properties of Yttrium Oxide
Journal of the American Ceramic Society, 1996Compressive properties of polycrystalline yttrium oxide (Y 2 O 3 ) were studied by slow‐strain‐rate experiments (ε= 5.7 × 10 –6 s −1 ) between room temperature and 1600°C ...
Özer Ünal, Mufit Akinc
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On the luminescent behaviour of europium in yttrium oxide and yttrium vanadate hosts
Czechoslovak Journal of Physics, 1979Europium-doped Y2O3 and YVO4 were excited by ultraviolet and 10 kV electrons to give the red emission of Eu3+. Increase in the fluorescence output with temperature under uv excitation results from an increased absorption and a more efficient energy transfer to the Eu3+ ions from charge-transfer states involving the Y-O and V-O componensts of the ...
M. S. Elmanharawy, A. Abdel-Kader
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Synthesis of europium-doped yttrium hydroxide and yttrium oxide nanosheets
Journal of Materials Science, 2007A new approach has been developed for the preparation of Y(OH)3:Eu and Y2O3:Eu nanosheets using the sol–gel method and hydrothermal reactions. XRD patterns showed that the product was purely hexagonal-phase Y(OH)3. TEM images revealed that the nanosheets are square shaped (1 × 1 μm2) with a thickness of several tens of nanometers.
Atsuya Towata +5 more
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Thermochromic Behavior of Yttrium-Substituted Bismuth Oxides
ACS Applied Materials & Interfaces, 2019High-temperature thermochromic materials are poorly explored in fundamental research, let alone applied research, although these materials may be used as low-cost, intuitively usable sensing materials in an industrial environment. Yet, only few of these materials have been described systematically.
Xi Liu +2 more
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Photodissociation of Yttrium and Lanthanum Oxide Cluster Cations
The Journal of Physical Chemistry A, 2008Transition metal oxide cations of the form M n O m (+) (M = Y, La) are produced by laser vaporization in a pulsed nozzle source and detected with time-of-flight mass spectrometry. Cluster oxides for each value of n form only a limited number of stoichiometries; MO(M2O3)x(+) species are particularly intense.
Z D, Reed, M A, Duncan
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Journal of Radioanalytical and Nuclear Chemistry Letters, 1985
Use of hydrogen peroxide as a masking agent for uranium during the EDTA titration of yttrium in an yttrium-uranium mixture containing large amounts of uranium has been investigated. High acetate ion concentration was necessary to keep the peroxy complex of uranium in solution during the titration.
R. K. Rastogi +3 more
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Use of hydrogen peroxide as a masking agent for uranium during the EDTA titration of yttrium in an yttrium-uranium mixture containing large amounts of uranium has been investigated. High acetate ion concentration was necessary to keep the peroxy complex of uranium in solution during the titration.
R. K. Rastogi +3 more
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Properties of Yttrium Oxide Ceramics
Journal of the American Ceramic Society, 1957The cubic structure of yttrium oxide is stable to 1800°C. in air as indicated by petrographic, X‐ray, and differential thermal analyses. A change in lattice parameter of less than ±0.007 a.u. was observed on heating the oxide to 1800°C. The mean specific heat of Y 2 O 3
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Thermal Expansion of Yttrium Oxide and of Magnesium Oxide with Yttrium Oxide
Journal of the American Ceramic Society, 1964T. H. NIELSEN, M. H. LEIPOLD
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On the luminescence characteristics of Pr3+ in yttrium oxysulfide and yttrium oxide
Journal of Applied Spectroscopy, 1975T. V. Babkina +5 more
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