SiO2-ZrO2 sols have been prepared via acid catalysis using a commercial colloidal suspension of zirconia and two silica alkoxides; tetraethoxysilane (TEOS) and methyltriethoxysilane (MTES). Suspensions with 10, 15 and 25-mol% of ZrO2 were prepared. The stability of the suspensions was followed by rheological measurements showing that the amount of water incorporated with the colloidal suspensio...

Carbon nanofibers decorated with various metal oxide nanoparticles were fabricated by combining an electrospinning technique of bicomponent polymer mixture and a sol-gel reaction subsequent carbonization process. Electrospun consisting polyacrylonitrile (PAN) poly(vinyl pyrrolidone) (PVP) controllable diameters PAN/PVP core/shell types via phase-separation due to the immiscibility between two p...

The interphase properties in nanocomposites indicate the interaction between filler and matrix, which is dependent on preparation method, shape, size of chemical two phases. Local environment polymer matrix give rise to different dielectric compared that bulk material. These allow understanding their effects glass transition (Tg) nanocomposites. In this study, power law model was used predict b...

Zirconia (ZrO2) nanoparticles were synthesized by solution combustion using urea as an organic fuel. Brunauer-Emmett-Teller (BET), X-ray diffraction (XRD), thermal gravimetric analysis (TGA), transmission electron microscopy (TEM), UV-vis and Fourier transform infrared (FTIR) measurements were performed in order to characterize the catalyst. The calculated crystallite size of ZrO2, calculated w...

A controllable transformation from interfacial to filamentary switching mode is presented on a ZrO2/ZrO2 - x /ZrO2 tri-layer resistive memory. The two switching modes are investigated with possible switching and transformation mechanisms proposed. Resistivity modulation of the ZrO2 - x layer is proposed to be responsible for the switching in the interfacial switching mode through injecting/retr...

Pure Anatase Titania (TiO2), mixed 1.0 wt.% Cerium-Anatase Titania (1.0 wt.%CeO2-TiO2), and mixed 1.0 wt.% Zirconia-Anatase Titania (1.0 wt.%ZrO2-TiO2) nano powders were synthesized by co-precipitation method and characterized using X-ray diffraction (XRD), Brunauer-Emmett-Teller (BET) surface area analysis, UV-Vis diffuse reflectance spect...

Plasma sprayed zirconia deposits have been employed in wide applications for thermal protection. Recently, the use of nanostructural surface represents an alternative for improving the performance of these coatings. The present paper reviewed the works in this field at our research group, including synthesis of nanostructural ZrO2 powders, influence of spraying parameters on microstructure and ...