Low Temperature Photosynthesis of Bi2O3 Nano Powder

Using photolysis method, bismuth oxide particles in the nano range were successfully prepared. The results showed prepared particle with high purity and this indicates the importance of this method. The synthesized particles characterized using XRD and AFM techniques. The results from XRD obtain prepared alpha phase with monoclinic structure while AFM result showed synthesis particles with 38 nm average.

Influence of Sintered Temperature on Spinel LiMg0.06Mn1.94O4 Synthesized by Flameless Liquid-Phase Combustion Method

The LiMg0.06Mn1.94O4calcined at 500 °C for 3 hours then sintered at 600 °C, 700 °C and 800 °C for 3 hours by flameless liquid-phase combustion synthesis are prepared. Particle properties were characterized by X-ray diffraction, scanning electron microscopy and Fourier transform infrared spectroscopy. Besides, galvanostatic tests and electrochemical impedance spectroscopy were performed to investigate the cycling performance. Particle properties analyses showed that LiMg0.06Mn1.94O4sintered at 600 °C has a single phase and the average grain size is about 80-200 nm with a little agglomeration, it also displays the highest initial capacity of 114.2 mAh/g and still remains 82.7% after 40 cycles. Results showed that sintered temperature by nitric acid assisted liquid-phase combustion method should be 600 °C.

Reduced Particle Removal Efficiency Upon Wafer Storage

Removal of particles from substrate wafers is one of the challenges in semiconductor industry. For this end, processes and equipment are developed using particle contaminated wafers. Preparation of these wafers differs from institute to institute, which makes it difficult to compare their cleaning performance results. The difference in behavior of differently prepared particle contaminated wafers is caused by the application method it self and the subsequent storage of these wafers after the particle application.

The effect of particles on dynamic recrystallization and fabric development of granular ice during creep

The mechanical behavior and microstructural evolution of laboratory-prepared, particle-free fresh-water ice and ice with 1 wt.% (~0.43 vol.%) silt-sized particles were investigated under creep with a stress level of 1.45 MPa at −10°C. The particles were present both within the grains and along the grain boundaries. The creep rates of specimens with particles were always higher than those of particle-free ice. Dynamic recrystallization occurred for both sets of specimens, with new grains nucleating along grain boundaries in the early stages of creep. The ice with particles showed a higher nucleation rate. This resulted in a smaller average grain-size for the ice with particles after a given creep strain. Fabric studies indicated that ice with particles showed a more random orientation of c axes after creep to ~10% strain than the particle-free ice.

Preparation and Magnetic Properties of Fe Nanoparticles by Chemical Vapor Condensation Process

Nano-sized Fe particles were synthesized by Chemical Vapor Condensation (CVC) Process using the precursor of iron carbonyl (Fe(CO)5) as the source. We investigated the microstructures, magnetic properties of the Fe nanoparticles and their oxidation behavior during annealing systematically by means of HRTEM, DTA-TG, Mössbauer spectroscopy. The prepared particle was nearly spherical shape and core-shell type structure. The magnetic states of Fe nanoparticles changed from superparamagnetism to ferromagnetism with the particle size and microstructure. Oxidation heat treatment leads to the successive appearance of oxide phases.