Showing papers in "Advanced Powder Technology in 2012"

TL;DR: In this article, it was found that Cr doping can effectively reduce the transition temperature of anatase to rutile phase as well as the grain size of TiO 2 thin films.

TL;DR: In this article, the authors compared the antimicrobial activity of nanosilver shapes; Ag-nanoplates (Ag-NPls), Ag-NRds, and Ag-NPs with a stabilizer, such as poly(N -vinyl-2-pyrrolidone) (PVP).

TL;DR: In this article, a single phase cubic copper ferrite powders can be obtained at different temperatures from 100 to 200°C for times from 12 to 36h with pH values 8-12.

TL;DR: In this article, a simple surfactant-free electrochemical method is proposed for the preparation of magnetite nanoparticles using iron as the anode and plain water as the electrolyte.

TL;DR: In this paper, a coarse grain model was developed to simulate the non-cohesive particle behavior in large-scale powder systems, where the coarse grain particle represents a group of original particles.

TL;DR: In this paper, the effects of varying parameters such as pH, temperature, initial metal concentration, and contact time on the adsorption process were examined, and the results showed that TiO 2 nanocrystals are useful for Hg(II) removal from aqueous solutions.

TL;DR: The modified drag law was found to be useful to simulate the low solids holdup in stirred tanks and the predictions in terms of velocity profiles and the solids distribution are found to been in reasonable agreement with the literature experimental data.

TL;DR: In this paper, the authors have shown that the MC reaction is dependent on not only material function such as Gibbs free energy change of formation (Δ G G AB O 3, where A and B trivalent oxides, respectively), but also on the structure of the starting samples.

TL;DR: The morphology, structure and photochromic activity of the synthesized WO 3 powders were studied by X-ray diffraction, scanning electron microscopy and UV-vis spectrophotometer combined with color difference meter.

TL;DR: In this paper, proniosome powders were prepared by varying the ratio of span 60 and cholesterol and evaluated for micromeritic properties and the results indicate acceptable flow properties. But proniosomes proved to be the potential carriers for efficient oral delivery of lipophilic or amphiphilic drugs.

TL;DR: In this paper, the authors used FTIR spectroscopy, thermal gravimetric analysis, X-ray photoelectron spectrograph, transmission electron microscopy, and Xray diffraction spectrograms to evaluate the colloidal stability of nanoparticles.

TL;DR: In this article, the effect of water quality, including pH, and type and concentration of salts (CaCl2, AlCl3 and NaCl) on froth stability and its relationship with mineral particles zeta potential and slurry viscosity was studied.

TL;DR: In this paper, Nanocrystalline sulfated zirconia powder was prepared by a non-alkoxide sol-gel route using acidic condition (pH 1-2).

TL;DR: In this paper, the authors calculated the natural gas flow fields and particles separation characteristics with the RNG k − − e turbulence model and Discrete Particle Method (DPM) in the supersonic swirling separator.

TL;DR: In this article, shape control of a hollow particle using calcium carbonate as the template with a variety of shapes such as cubic, rough-surfaced spherical and rod-like particles was demonstrated.

TL;DR: In this article, an optimized mechanical milling and hot pressing method was used to produce nanostructured Al2024 composites, which achieved an endothermic peak at ∼632°C due to Al 2024 melting and exothermic peaks between 645 and 658°C related to Al and MWCNTs reaction.

TL;DR: In this article, the authors demonstrate that the constant discharge rate is caused by the formation and collapse of arches in the bin, and derive an equation for determining the discharge rate.

TL;DR: Mordenite is a zeolite that has been used as a selective adsorbent and as a catalyst as discussed by the authors, and it can be synthesized in the absence of organic template by hydrothermal method at 180°C for 5 days after stirring at high speed and aging in the synthesis mixture with the molar composition of 12Na 2 O:100SiO 2 :2Al 2 O 3 :500H 2 O.

TL;DR: In this paper, the effect of aging times and temperatures on physical and chemical properties of TiO 2 sol particles was systematically investigated, and the results showed that the crystallinity and average particle size of the TiO2 sol particles can be successfully controlled by adjusting the aging time and temperature.

TL;DR: In this article, a yttrium aluminum garnet (YAG:Ce) powder was synthesized by the Pechini method with aluminum nitride, yttium nitride and citric acid as the starting materials.

TL;DR: In this paper, a nanostructured silver with an average crystallite size of 28nm and internal strain of 0.44% was synthesized by mechanochemical reduction of Ag 2 O using graphite in a high energy planetary ball mill.

TL;DR: In this article, the relationship between supersaturation and crystal qualities is discussed, and the operation design methods are introduced to control crystal qualities in solution crystallization in order to keep high quality such as size distribution, crystal morphology and polymorph.

TL;DR: In this article, the magnetic properties and electromagnetic parameters of pure Fe 3 O 4 and Fe 3 o 4 /Co core/shell-type nanoparticles were measured in the frequency range of 2-18 GHz.

TL;DR: In this article, a technique for microencapsulating pyriproxyfen, a widely used insect growth regulator, using interfacial polymerization was described, which successfully prepared self-bursting microcapsules that retained their shape when suspended in water but break open quickly after the water evaporates.

TL;DR: The effect of addition of glucose on the crystal size, structure and photocatalytic activity of Cu 2 O particles was studied in this article, which showed that higher concentrations of glucose lead to an increase in the decrease of the photocatalysis efficiency of the particles.

TL;DR: In this paper, a kind of silver powder with controllable size and high tap density was prepared by using silver nitrate as metal source, ascorbic acid as reducing agent and gum arabic as dispersant under traditional chemical reduction method.

TL;DR: In this article, the effects of TiC content and preparation methods on the microstructure and mechanical properties of 316L stainless steel composites have been investigated, and the results showed that the sample prepared by warm compaction and microwave sintering exhibited significantly superior densification, higher hardness, and better abrasion resistance when compared with conventionally processed counterpart.

TL;DR: In this article, the effects on breakage kinetics of the ball diameter and the fractional ball filling were investigated on the barite powder at batch grinding conditions based on a kinetic model.

TL;DR: In this paper, a characterization and comparison of the cohesion index, powder flow speed dependency and caking properties of four different aggregates of fat particles with three different moisture contents, used in various compositions of powdered soup concentrates is presented.

TL;DR: In this article, the effect of rotational speed, the volume percentage of the balls and powders on impact energy, the frequency of the impacts, the abrasion of balls and the dissipated energy have been investigated.