Abstract Commercial hydrothermally synthesized BaTiO 3 powder with a cubic structure was annealed in temperature range of 650 °C–900 °C, and the cubic-tetragonal transition microstructure evolution were investigated relation to annealing process. The used had below an 800 °C tetragonal above 850 °C. Particle growth occurred under low activation energy ∼33.2 kJ mol −1 because nanocrystalline siz...

In this paper CuFe2O4, nanocrystalline powders were prepared. Also, the supported Cu ferrite was obtained by impregnation of the supports with Cu and Fe nitrates solutions, for calcination temperature 450 ºC. The samples were characterized by X-ray powder diffraction (XRD) and Fourier transform-infrared spectroscopy (FT-IR). In this investigation photocatalytic degradation...

Nanocrystalline cerium oxide is an attractive material for catalysis of environmentally hazardous gas-phase species such as sulfur dioxide and carbon monoxide. Oxygen vacancies in cerium oxide are believed to coordinate and aid in the transfer of oxygen ions between the reactive species. We have sought to characterize these defects in nanocrystalline cerium oxide as a function of the heat treat...

The paper analyzes the influence of material from which ferromagnetic core a transformer is made on characteristics full-bridge converter. Experimental investigations were carried out for three bridge converters containing transformers with ring cores various materials: iron powder, ferrite, and nanocrystalline material. properties aforementioned considered in wide range changes input voltage, ...

Natural bone consists of hard nanostructured hydroxyapatite (HA) in a nanostructured protein-based soft hydrogel template (ie, mostly collagen). For this reason, nanostructured HA has been an intriguing coating material on traditionally used titanium for improving orthopedic applications. In addition, helical rosette nanotubes (HRNs), newly developed materials which form through the self-assemb...

In recent years, near-nano (submicron) and nanostructured materials have attracted increasingly more attention from the materials community. Nanocrystalline materials are characterized by a microstructural length or grain size of up to about 100 nm. Materials having grain size of 0.1 to 0.3 mm are classified as submicron materials. Nanocrystalline materials exhibit various shapes or forms, and ...