RF thermal plasma synthesis of zinc-ferrite nanopowders has been studied from metallurgical wastes of high iron oxide and zinc oxide and/or hydroxide content. XRD measurements of the products revealed that an extensive spinel formation took place on RF plasma treatment. However, instead of expectable ZnFe2O4, formation of zinc ferrous ferrites (Zn0,7Fe2,3O4 and Zn0,4Fe2,6O4) was concluded from ...

Radiation transport and multiple scattering calculations are presented and compared with experimental observations to characterize light attenuation in high emissivity nanopowders irradiated with low power laser light at room temperature, and to explain the associated white light emission and the onset of melting. Using radiation tuned to an absorption resonance of Yb dopants in Y2O3 nanopowder...

In this research, a novel thin film Si-GO10 and nanopowders Si-GO30 of silica-graphene oxide (GO) composite were prepared via the sol–gel method deposited on glass substrates using spray pyrolysis. X-ray diffraction (XRD) results showed relatively strong peak in graphite layer that corresponds to (002) plane. Transmission electron microscope (TEM) images SiO 2 nanoparticles randomly distributed...

The enhanced laser cooling performance of rare-earth-ion-doped nanocrystalline powders is predicted, compared to the bulk material, using Yb:Y2O3 as the model material. This is achieved by enhancing the off-resonance, phonon-assisted absorption, which is proportional to the three factors considered in this paper: the dopant concentration, the pumping field energy, and the excitation coefficient...