In this paper, we investigate the influence of postgrowth thermal treatment on the structural quality and surface morphology of crystalline Y2O3 films prepared by molecular beam epitaxy (MBE) on (001) Si substrates. As-grown films are characterized by a relatively thick interfacial layer, which develops during growth. In situ annealing under ultrahigh vacuum results in the desorption of this la...

Bifunctional monodispersed Fe3O4 particles coated with an ultrathin Y2O3:Tb3+ shell layer were fabricated using a facile urea-based homogeneous precipitation method. The obtained composite particles were characterized by powder X-ray diffraction, transmission electron microscopy (TEM), quantum design vibrating sample magnetometry, and photoluminescence (PL) spectroscopy. TEM revealed uniform sp...

Y2O3:Eu nanophosphors were prepared by flame synthesis using ethanol or water as precursor solutions. The effects of precursor solvents and flame temperature on particle size, morphology, and photoluminescence intensity were investigated. The results showed that flame synthesis using ethanol solution could produce nanoparticles with better homogeneity, smoother surface structure, and stronger p...

For liquid breeder blanket system using molten salts, tritium barrier, anti-corrosion barrier, tritium recovery system and heat exchanger make important roles. Especially in the heat exchanger, the tritium permeation from primary coolant loop to secondary coolant loop must be inhibited by the tritium barrier for safety. To develop it, it is essential to optimize chemical stability of the barrie...

Ultrathin films of Eu3+ doped Y2O3 were deposited onto alumina nanoparticles using a unique solution synthesis method. The surface structure, composition, and morphology of the thin films deposited were analysed using high resolution transmission electron microscopy (TEM) and high angle annular dark field scanning TEM imaging and energy dispersive x-ray measurements. The films deposited were ex...

Rare-earth phosphors are commonly used in display panels, security printing, and fluorescent lamps, and have potential applications in lasers and bioimaging. In the present study, Eu3+- and Dy3+-codoped uniform-shaped Y2O3 submicron particles were prepared using the urea homogeneous precipitation method. The structure and morphology of the resulting particles were characterized by X-ray diffrac...

The AlCoCrFeNi powder was added to WC as a binder and Y2O3/ZrO2 doped by the wet chemical method grain-growth inhibitors. WC-Y2O3-ZrO2-10AlCoCrFeNi composite powders were sintered spark plasma sintering obtain an alloy. microstructure properties of cemented carbide studied. result showed that rare-earth-oxide (Y2O3/ZrO2)-refined grain size alloy high-entropy provided with better hardness toughn...

Aluminum nitride (AlN) is a promising material for electronic substrates and heat sinks. However, AlN powders react with water that adversely affects final part properties necessitates processing in organic solvents, increasing the cost of parts. Small quantities yttrium oxide (Y2O3) are commonly added to particles enable liquid phase sintering. To mitigate reaction water, particle atomic layer...

A study was performed to investigate the effect of increasing the Al or Al2O3 precursor content, above the stoichiometric amount, on the formation of β-sialon by pressureless sintering of Al, Si and Al2O3 powders in flowing nitrogen gas. The effect of adding Y2O3 or Fe to the precursor mixture, on the β-sialon formation, was also studied. The phase morphology and yield produced by the various c...