Nanotechnology is gaining tremendous impetus in the present century due to its capability of modulating metals into their nano size, which drastically changes the chemical, physical and optical properties of metals. The extremely small size of nanoparticles help them to occupy a greater surface area and hence a better accessibility and targeted action. Nanoparticles can overcome existing drug r...

Engineered aluminum oxide (Al2O3), titanium dioxide (TiO2), and silicon dioxide (SiO2) nanoparticles (NPs) are utilized in a broad range of applications; causing noticeable quantities of these materials to be released into the environment. Issues of how and where these particles are distributed into the subsurface aquatic environment remain as major challenges for those in environmental enginee...

A series of CuO-ZnO-Al2O3 nanoparticles over HZSM-5 were successfully prepared using different methods of batch co-precipitation, semibatch co-precipitation and combined co-precipitation-ultrasound. Nitrates of copper, zinc and aluminum were used as precursors, while Na-ZSM-5 was employed as composite support and sodium carbonate was used as precipitant agent. The effects of preparation methods...

This research investigates the effects of addition Fe2O3 and Al2O3 nanoparticles (30, 60 90 ppm) Fe2O3–Al2O3 hybrid to pure diesel fuel on combustion, performance emission characteristics a engine. The results indicated that blends improved combustion (in-cylinder pressure heat release rate), (power, consumption thermal exergy efficiency) showed peak increased by 4% rate was 15% in comparison w...

In this work, polymer composite materials based on linear low-density polyethylene armored with nanoparticles of aluminum oxide were obtained. A variety concentrations has been proven to affect the physical and mechanical properties resulting composite. Mechanical parameters studied in static dynamical regimes as well temperature dependence dynamic behavior samples was examined. As a result, op...

Alumina is the most widely used oxide ceramic material. It exists in many metastable forms which lead upon severe thermal treatment towards the thermodynamically stable phase alpha. Sintering of alumina generally takes part in a minimum of two stages: i) phase transition(s) towards the stable phase alpha and ii) densification of this phase alpha. The former step(s), linked to transition phase(s...

I have proposed a bottom-up technology utilising irradiation with active beams, such as electrons and ions, to achieve nanostructures size of 3–40 nm. This can be used nanotechnology that provides the desired structures, materials, phases at positions. Electron beam metastable θ-Al2O3, more than 1019 e/cm2s in transmission electron microscope (TEM), enables production oxide-free Al nanoparticle...

A first-principles study of the vibrational modes of PbTiO3 in the ferroelectric tetragonal phase has been performed at all the main symmetry points of the Brillouin zone ~BZ!. The calculations use the local-density approximation and ultrasoft pseudopotentials with a plane-wave basis, and reproduce well the available experimental information on the modes at the G point, including the LO-TO spli...

Alumina toughened zirconia (ATZ) and zirconia toughened alumina (ZTA) are currently the materials of choice to meet the need for tough, strong, and bioinert ceramics for medical devices. However, the mechanical properties of ZrO2/Al2O3 dispersion ceramics could be considerably increased by reducing the corresponding grain sizes and by improving the homogeneity of the phase dispersion. Here, we ...