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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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Electrochemical deposition of yttrium oxide
Journal of Materials Chemistry, 2000Thin films of yttrium hydroxide were obtained from aqueous Y(NO3)3 and YCl3 salt solutions via cathodic electrodeposition. The electrodeposition yield was studied under various experimental conditions. By varying the current density, deposition time and yttrium salt concentration, the amount of the deposited material could be controlled ...
Igor Zhitomirsky, Anthony Petric
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Sintering zirconia with yttrium oxide
Refractories, 1975An investigation was carried out of the sintering of zirconia containing 4–15 mole % yttrium oxide in which it was confirmed that the sintering of the materials begins at 500°C.
A. G. Karaulov, I. N. Rudyak
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The Gel Route to Yttrium Oxide
MRS Proceedings, 1988ABSTRACTSynthesis of pure Y2O3 Powders have been performed through the sol-gel process. Stable colloids in the range of 500 Å to 2000 Å have been obtained by hydroxylation of yttrium-aquo ions performed through an anion exchange resin.The chemical nature of these sols and gels investigated by GTA, DTA and EXAFS is in close agreement with Y(OH)3nH2O ...
F. Ribot, C. Sanchez, J. Livage
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Sputter deposition of yttrium–oxides
Journal of Vacuum Science & Technology A: Vacuum, Surfaces, and Films, 1993The yttrium–oxide phase diagram contains only one equilibrium compound, a Y2O3 cubic structure. The process of reactive sputter deposition is used to synthesize previously unreported, yttrium-rich oxide compounds. A planar magnetron is operated in the direct–current mode using a working gas mixture of argon–20% oxygen.
A. F. Jankowski +2 more
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The Kinetics of the Chlorination of Yttrium Oxide
Metallurgical and Materials Transactions B, 2009The chlorination kinetics of Y2O3 with chlorine to produce YOCl was studied by thermogravimetry over a temperature range from 575 °C to 975 °C. The influence of convective mass transfer into the boundary layer surrounding the sample, gaseous diffusion into the sample pores, partial pressure of chlorine, and temperature on the reaction rate were ...
J.P. Gaviría, A.E. Bohé
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Oxidation of Zirconium-Yttrium Alloys
Advances in X-ray Analysis, 1964AbstractThe phase and elemental distributions on zirconium alloys containing 5, 10, 25, 35, and 50 at.%. yttrium, oxidized in dry air at 1200 and 1600°C, have been studied by X-ray diffraction, fluorescence, and electron-microprobe techniques. Zirconium-yttrium alloys, which are entirely solid at 1200°C, and zirconium 5 and 25 at.% yttrium alloys ...
D. I. Phalen +2 more
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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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