Results 201 to 210 of about 3,128 (236)
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Sintering and recrystallization of yttrium oxide
Refractories, 1972The sintering of pure yttrium oxide was studied in the range 1800–2100°C with a soak of up to 30 h. The kinetics of densification and grain growth were studied during sintering, and the corresponding activation energy levels were calculated.
L. B. Borovkova +2 more
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Spectra of europium-doped yttrium oxide and yttrium vanadate phosphors
Czechoslovak Journal of Physics, 1978The spectral distributions of the visible absorption and fluorescence emission under electron beam excitation of Eu3+-doped (Y2O3) and (YVO4) powders have been detected and analyzed. (Y2O3: Eu3+) has a cubicC crystal structure with a unit cell dimension a=10·61 A.
M. S. Elmanharawy +2 more
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Effect of N2 plasma on yttrium oxide and yttrium–oxynitride dielectrics
Journal of Vacuum Science & Technology A: Vacuum, Surfaces, and Films, 2004In this article, we report the effect of nitrogen plasma, during and after deposition, on nitrogen incorporation into yttrium oxide dielectric films. Films are deposited using a yttrium β-diketonate precursor (Y(tmhd)3) introduced downstream from a O2 or N2 plasma. The precursor acted as a significant source of oxygen, and only small amounts of N (&
D. Niu +3 more
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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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Investigating transformation kinetics of yttrium hydroxide to yttrium oxide
Materials Chemistry and Physics, 2022Ruby Priya +5 more
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