We describe the formation of SiC nanopowder using an atmospheric argon microwave plasma with tetramethylsilane (TMS) as precursor. The impact of several process conditions on the particle size of the product is experimentally investigated. Particles with sizes ranging from 7 nm to about 20 nm according to BET and XRD measurements are produced. The dependency of the particle size on the process ...

Metallic nanopowder is employed in several applications for its flexibility of use, thus production growing over the years. Exploding wire technique can produce a wide range nanoparticles from electrically conducting samples, and it has potential high efficiency productivity, due to strongly localized power dissipation. On other hand, phenomena involved during explosion are complex, phenomenolo...

In this paper, 2wt.% Fe doped TiO2 nanopowder was prepared by a combination of sol-gel and mechanical alloying methods. The mechanical alloying of Fe powder with Ti(OH)4 gel produced from the sol-gel method was used to produce Fe doped TiO2 nanopowder. The synthesized samples were characterized by X-ray diffraction (XRD), field emission scanning electron microscopy (FESEM) and diffuse reflectan...

We investigate the origins of lasing emission in a scatterer-resonance-controlled random laser made of ZnO nanopowder over a wide temperature range (20–300K). At higher temperatures ( 150 > K), the lasing emission appears around exciton recombination energies and the lasing threshold carrier density is comparable to the Mott density, indicating that the resonance-controlled random laser is goin...

Phosphor nanomaterials are of special interest today due to their broad range of applications from the solid state lightening and novel flat displays to high resolution X-ray detectors and sensors in biomedicine. Among them polycrystalline Eu 3+ doped mixed oxide (Y 1-x Gd x) 2 O 3 is a well-known luminescent material widely used to provide red light emission for modern optoelectronic devices [...

Abstract Novel bulk single-component sulfide catalysts were prepared under the conditions of solid-phase dispersion МoS 2 molybdenite at various mechanical treatment times and amounts polar nonpolar liquid microadditives. The chemical degradation samples in air was found to lead formation surface sulfate anions that shield catalytically active Mo sites. Indirect correlations hydrodesulfurizatio...

highly sinterable alumina nano-powders have been synthesized by a sol-gel combustion method with glycine asfuel. the preparation involved the thermal decomposition of a chelating agent (fuel)-nitrate gel and theformation of amorphous precursors. the nanopowders calcined at 1100°c were characterized by x-ray powderdiffraction (xrd) and scanning electron microscopy (sem). it was found that the ch...