Zirconium oxide has found extensive applications in various industries because
of its excellent properties such as high strength; high-temperature resistance;
extraordinary wearing resistance; ionic conductivity; and corrosion resistance. Also, some
Properties like high melting point, high mechanical and thermal strength, high dielectric
constant and low conductivity have introduced this material as a prominent candidate for
engineering applications. In this study, zirconium oxide (ZrO2) Nano fibers was
synthesized by calcination of propoxide zirconium oxide/polyvinyl alcohol using sol-gel
and electrospinning methods. The morphology of the Nano fibers was verified by
scanning electron microscopy (SEM) and its crystalline phase was investigated by x-ray
diffraction and energy-dispersive x-ray spectroscopy (EDS). The mean diameter of the
Nano fibers varied in the range of 70-200 nm. XRD patterns also indicated the presence
of monoclinic and tetragonal phases in the Nano fibers calcined at 700 ℃. Results also
revealed that this new precursor can be used in the electrospinning technique to obtain
ZrO2 Nano fibers with relatively high purity. تفاصيل المقالة

In this research, iron oxide nanostructures
have been successfully synthesized using the coprecipitation
method. The results of structural studies
using X-ray diffraction (XRD) analysis showed that the
synthesized samples have a simple cubic structure. The
lattice parameter of these synthesized nanostructures was
calculated with the aid of the Rietveld refinement
method. It was found that the lattice parameter is about
8.388 Å. Electron microscopy images (SEM) showed that
the samples have sheet likes shapes. From SEM images,
it was found that the synthesized nanosheets' thickness
was about 33 nm. The optical properties of the samples
were also studied using ultraviolet-visible spectroscopy.
These studies showed that the samples have a broad
absorption peak of about 350 nm. The samples were
irradiated with a beam with a wavelength of 205 nm to
measure the emission spectra. There were several
emission peaks observed in the emission spectra of
samples. The highest emission peaks were observed at
482nm and 527 nm, respectively. تفاصيل المقالة