Results 121 to 130 of about 613 (173)

Mechanical and Dielectric Properties of Porous Slip Cast Silicon Nitride Using Ytterbium Oxide Sintering Aids

International Journal of Applied Ceramic Technology, Volume 23, Issue 3, June 2026.
Silicon nitride samples were slip cast using ytterbium oxide sintering aids to fabricate porous materials for radar frequency windows. Varying sintering temperature and ytterbium oxide content were used to tailor microstructure and phase composition. Flexural strength was measured at room temperature and 1000°C.
Averyonna R. Kimery, Matthew A. Thompson, Collin C. McClain, Keith S. Caruso, Carlos J. Martinez, Rodney W. Trice   +5 more
wiley   +1 more source

Effect of Sintering Aid Composition and Porosity on the Oxyacetylene Torch Response of Silicon Nitride for RF Windows

Journal of the American Ceramic Society, Volume 109, Issue 6, June 2026.
Silicon nitride samples were slip cast using yttrium oxide–aluminum oxide and ytterbium oxide sintering aids to fabricate plates with up to 40% porosity and compare them to a fully dense commercial standard. Silicon nitride plates were tested with an oxyacetylene torch to investigate changes in front and back face temperature, spectral emissivity ...
Matthew A. Thompson, Rodney W. Trice
wiley   +1 more source

Effect of Yttrium Doping on Titanium Dioxide

Journal of the American Ceramic Society, Volume 109, Issue 6, June 2026.
ABSTRACT The wide band gap and chemical–mechanical stability of titanium dioxide (TiO2) make it one of the most important semiconductor materials for photocatalytic applications. However, its performance is limited by its low absorption in the visible light region. In this study, yttrium (Y)‐doped TiO2 (Y/TiO2) powders containing 1%, 5%, and 10% Y were
Fatma Aydın Ünal, Murat Ünal, Sebahat Topal   +2 more
wiley   +1 more source

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Green synthesis, characterization of yttrium oxide, stannous oxide, yttrium doped tin oxide and tin doped yttrium oxide nanoparticles and their biological activities

Materials Today: Proceedings, 2021
Abstract Yttrium doped tin oxide and Tin doped yttrium oxide nanoparticles were prepared by using Solanum nigrum plant extract. The obtained nanoparticles were confirmed by XRD and SEM. The antimicrobial activities of green synthesized nanoparticles were studied by using Bacillus subtilis.
Vennila raj, P. Kamaraj, M. Sridharan, J. Arockiaselvi   +3 more
openaire   +3 more sources

Investigating transformation kinetics of yttrium hydroxide to yttrium oxide

Materials Chemistry and Physics, 2022
Ruby Priya, Shagun Kainth, Dinesh Kumar, Piyush Sharma, P.K. Diwan, O.P. Pandey   +5 more
openaire   +3 more sources

Carbochlorination of yttrium oxide

Thermochimica Acta, 2010
Abstract 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
openaire   +2 more sources

Electronic structure of yttrium oxide

Physical Review B, 1990
The 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, , Noguera, , Thromat, , Gautier, , Duraud   +4 more
openaire   +2 more sources

Thin film studies of yttrium, yttrium hydrides and yttrium oxide

Journal of Physics F: Metal Physics, 1978
Electron 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
openaire   +1 more source

Thermal transformation of yttrium hydroxides to yttrium oxides

Thermochimica Acta, 1988
Abstract The reaction between aqueous solutions of yttrium salts (chloride and nitrate) at constant concentration and alkaline solutions (sodium and ammonium hydroxides) were investigated under different conditions. As a result, amorphous and hexagonal yttrium hydroxides, Y(OH)3, were formed and in addition monoclinic yttrium hydroxide, α-Y(OH)3, was
Taichi Sato, Satoshi Imaeda, Keiichi Sato   +2 more
openaire   +1 more source

Luminescence of yttrium oxide

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, A. V. Rasuleva, V. I. Solomonov   +2 more
openaire   +1 more source