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Synthesis and characterization of rod-like Y2O3 and Y2O3:Eu3+
Journal of Materials Science, 2003Y2O3 rods 100 to 200 nm in diameter and 10 to 20 μm in length are accessible via polyol-mediated synthesis of a precursor material with similar shape. By heating of Y(CH3COO)3 · xH2O and a defined amount of water at 190°C in diethylene glycol, the rod-like precursor material is formed. Infrared spectroscopy (IR), differential thermal analysis (DTA) and
C. Feldmann, J. Merikhi
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High‐Temperature Phase Relations in the System Y2O3‐Y2O3·WO3
Journal of the American Ceramic Society, 1980Phase relations in the system Y 2 O 3 ‐Y 2 O 3 ·WO 3 were studied at >1400°C.
Kiyoshi Kuribayashi +3 more
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The structural and electrical comparison of Y2O3 and Ti-doped Y2O3 dielectrics
Ceramics International, 2017A Ti-doped Y2O3(Y2Ti2O5) dielectric on polycrystalline silicon followed by rapid thermal annealing results in improved characteristics including a higher effective dielectric constant, higher breakdown electric field, lower electron trapping rate, and larger charge-to-breakdown when compared with Y2O3.
Ming Ling Lee +5 more
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High-pressure induced phase transitions of Y2O3 and Y2O3:Eu3+
Applied Physics Letters, 2009We investigated high-pressure induced phase transitions in Y2O3 and Eu-doped Y2O3 (Y2O:Eu3+) using angular dispersive synchrotron x-ray diffraction, Raman spectroscopy, and photoluminescence (PL). With increasing pressure, we observed a series of phase transformations in Y2O3:Eu3+, which followed a structure sequence of cubic→monoclinic→hexagonal ...
Lin Wang +8 more
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Features of the spectroscopic characteristics of Y2O3:Tm, Y2O3:Ho, and Y2O3:Tm,Ho ceramics
Izvestiya vysshikh uchebnykh zavedenii. FizikaThe work presents a comparative analysis of spectroscopic characteristics (oscillator strengths, intensity parameters) for Y2O3:Ho, Y2O3:Tm and Y3Al5O12:Ho, Y3Al5O12:Tm. It is shown that high values of oscillator strengths of «hypersensitive» transitions 5I8→5G6 of Ho3+ ions and 3H6→3H4, 3H6→3H4 of Tm3+ ions, as well as the intensity parameters Ω2 in ...
Polina A. Ryabochkina +4 more
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Features of ZrO2–Y2O3 System Nanopowders with a Different Y2O3 Content
Refractories and Industrial Ceramics, 2015Combination light scattering spectroscopy and infrared spectroscopy are used to study ZrO2 powder stabilized with 2, 3, 5, and 7 mol.% Y2O3. Changes in spectra are demonstrated connected with an increase in amount ofstabilizing addition. Differential thermal analysis establishes that variation of Y2O3 content affects the position of peaks for thermal ...
S. E. Porozova +3 more
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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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Structural characterization of epitaxial Y2O3 on Si (0 0 1) and of the Y2O3/Si interface
Materials Science and Engineering: B, 2004Abstract The search for high dielectric constant (high- k ) oxides to replace silicon dioxide for future CMOS devices is a formidable task. Key issues are definitely good structural and electrical properties as well as high quality interfaces between the high- k and the semiconductor substrate. In this work we study the local structure of ultra thin
S Spiga +9 more
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Electrical properties of MgO + Y2O3 and CaO + Y2O3 partially-stabilized zirconias
Journal of Materials Science Letters, 1985Etude de la microstructure et de la resistivite electrique de zircones partiellement stabilisees par MgO+Y 2 O 3 et par CaO+Y 2 O ...
R. K. Slotwinski +2 more
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2023
The minimum permissible amount of a modifying nanostructured additive in powder compositions has been determined, which makes it possible to carry out the reaction of nitrate-organic synthesis and to provide further nanostructural hardening of ceramics.
Nesterova, I. A. +3 more
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The minimum permissible amount of a modifying nanostructured additive in powder compositions has been determined, which makes it possible to carry out the reaction of nitrate-organic synthesis and to provide further nanostructural hardening of ceramics.
Nesterova, I. A. +3 more
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