Sonochemical preparation and characterization of Eu2O3 and TbO3 doped in and coated on silica and alumina nanoparticles

Article Abstract:

A study was conducted to analyze the ultrasound-based preparation, morphological characterization and optical features of amorphous europium oxide and terbium oxide nanoparticles. A general technique for preparing rare-earth oxide nanoparticles was developed. The luminescent efficiencies of the nanoparticle of alumina doped by europium and terbium were examined against those of commercial phosphors. Results indicated that europium in alumina supports higher luminescent intensities than in silica.

Oxides, Rare earth metals

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Sonochemistry under an applied magnetic field: determining the shape of a magnetic particle

Article Abstract:

A study was conducted to analyze the sonochemical irradiation of Fe(CO)5 solution in Decaline with and without an external magnetic field. The Rigaku X-ray diffractometer was utilized to carry out powder X-ray diffraction measurements. Results indicated that the sample with no magnetic field supported spongelike particles with an average size of about 25 nm. In addition, samples with magnetic fields were characterized by highly acicular particles of 50 nm in length and 5 nm in width.

Particles, Particulate matter, Magnetic fields

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Tailoring the properties of FE-Fe3C nanocrystalline particles prepared by sonochemistry

Article Abstract:

The effects of sonolysis and thermal treatment conditions on chemical composition, magnetic properties, and particle size of Fe/Fe3C nanocrystalline material are investigated. It is seen that the nanocrystalline particles have a core-shell structure where a coating of Fe3C and carbon protects the body-centered cubic Fe in the core from oxidation.

Science & research, Properties, Carbon compounds

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