Showing papers in "Advanced Powder Technology in 2009"

TL;DR: In this article, magnetic properties were investigated with SQUID, which unravelled superparamagnetic behaviour for all materials and typical features for the corresponding crystal structures and particle sizes, and maximum magnetisation was achieved for a mixture of magnetite and magnetite.

TL;DR: In this article, the authors reported the synthesis of mesoporous silica xerogels in high purity from bagasse ash using NaOH solution and showed that the adsorption capacity was better for high-purity silica compared with low purity.

TL;DR: In this paper, the use of aerosol spray methods for the preparation of nanoparticles and nanostructured particles for application in optical materials is reviewed and a range of unique optical properties associated with optical materials that result from nanoparticle processing are highlighted.

TL;DR: Using coal fly ash (FA), pure-form Na-A and -X zeolites were synthesized by two-step process in this article, where the FA was pretreated in aqueous NaOH solution under stirring condition at 85°C for 18h.

TL;DR: In this article, a review identifies the current state of theoretical and experimental understanding of powder dispersing in a gaseous medium, and the approaches to relate bulk powder properties to dispersion, the stresses produced on a particulate structure due to aerodynamic forces and possible approaches for linking the two are discussed.

TL;DR: In this paper, a combination of hydrothermal synthesis and low temperature solid-phase reaction was used to control the nanocrystalline structure with well defined pore size distribution and high surface area than the traditional high temperature calcination process.

TL;DR: In this article, the applicability of the new flame retardant for the intumescent fire retardant coating (IFRC) daubed on the top of the plywood was investigated.

TL;DR: In this paper, a multi-scale study of the particles flow was performed by means of discrete element method (DEM) to establish the spatial and statistical distributions of microdynamic variables related to flow and silo structures such as velocity, porosity, coordination number, and interaction forces between particles.

TL;DR: In this paper, the effects of pyrolysis pressure, temperature and carrier gas temperature on the size and morphology of the synthesized TCO nanoparticles were systematically investigated and the resistivities of the formed pellets were measured and compared.

TL;DR: To advance in this area further, there has to be a close collaboration between technical experts and engineers who have devices looking for clinical application(s), the medical experts who have the clinical problems looking for a test/biomarker that can be helpful in diagnosis or monitoring, and industry/commercial experts who can build and commercialize the final product.

TL;DR: In this article, an experimental investigation was carried out on the ultra-fine grinding of inorganic powders using a stirred ball mill and the power consumed in the grinding process was measured, and the comminution coefficient was examined, based on an analysis of the relationship between the experimental specific surface area and the particle size distribution of ground products.

TL;DR: In this paper, the particle detachment process due to its interaction with a flowing gas of different flow properties, including a pulsating jet flow and a developed turbulent flow, is analyzed, and the mechanisms of the pulloff forces as well as sliding and rolling effects in the presence of asperities are also presented.

TL;DR: In this paper, an experiment study of agglomerating fluidization behavior of three kinds of nano-particles in vibro-fluidized bed (VFB) has been performed.

TL;DR: In this paper, a processing scheme which uses a single chemical that has multiple functions to achieve both efficient mineral flotation and solids dewatering is presented, which has the potential to reduce the amount and types of reagents required for mineral processing.

TL;DR: In this article, a stability study was carried out by an encapsulation with anionic PSS [poly (sodium 4-styrenesulfonate)] and cationic PDADMAC [Poly (diallyldimethylammonium-chloride)] polyelectrolytes to improve the stability of pigment particle suspensions.

TL;DR: In this paper, coal fly ash was treated with the mixture of NaOH aqueous solution and NaCl annealing at 373 K, using the microwave heating and the conventional heating in order to clarify influences of the NaCl concentration in the hydrothermal solution on the growth rate and the crystalline phase of synthesized zeolites.

TL;DR: In this paper, the authors evaluated the drying behavior of spent grain in a rotary superheated steam (SHS) dryer, based on product moisture content, measurements of sticking and energy consumption.

TL;DR: In this article, the formation kinetics of hollow CaCO 3 particles were studied using an on-line monitoring system and it was verified that the pH for the formation of the hollow particles depended on the reaction temperature.

TL;DR: In this paper, the particle separation performance of single and two inlet hydrocyclones was evaluated using an aqueous slurry of silica particles with a median diameter of about 2.1μm.

TL;DR: In this paper, a colloidal crystal consisting of cubic closely packed (ccp) polystyrene particles and filled with polydimethylsiloxane (PDMS) elastomer was reported.

TL;DR: In this article, fly ash particles were used as fillers in an aluminum alloy matrix material and the resulting composites were compacted at pressures ranging from 63MPa to 316MPa.

TL;DR: In this article, several composites of carbon and natural zeolite with varying amounts of carbon were synthesized as prospective adsorbents to adsorb organic contaminants from waste water.

TL;DR: In this article, a unique ZrO 2 crystal within pores was prepared by a sol-gel-hydrothermal method and characterized by XRD, TG/DTA, TEM, SEM, and N 2 adsorption-desorption isotherms.

TL;DR: In this paper, the authors analyzed the optimum conditions for comminution of magnetic particles (such as Ni particles) in pure water contained in a flask, which was located on top of an actuator that contained a rotating bar magnet.

TL;DR: In this paper, the effect of size and inventory of coarse components on the fluidization behavior of nano-particles has been studied and the results reveal that the fluidisation quality of the mixture systems can be improved with increasing the amount of the coarse particles.

TL;DR: In this paper, the effects of the crystallinity of the Ga 2 O 3 particles and nitridation time on transformation to GaN were characterized using X-ray diffraction and scanning/transmission electron microscopy.

TL;DR: In this article, the authors established the relationship between the settled solid profile and the physical/rheological properties of coal ash slurry at high concentrations by experimentally measured in terms of cone angle for fly ash as well as mixture of fly ash (FA) and bottom ash (BA).

TL;DR: In this paper, spherical calcium carbonate vaterite crystals were synthesized and the effect of them on stabilization of suspension polymerization of methyl methacrylate was investigated, and the results showed that poly(methyl methacylbenzene sulfonate) beads were prepared.

TL;DR: In this article, a coprecipitation method using a high mechanical energy field as the synthesis reaction system of magnetite was developed for preparing the superparamagnetic Fe 3 O 4 nanoparticles with high crystallinity in water system.

TL;DR: In this article, the numerical analysis of kinematic and dynamic similarities of particle behavior in high shear mixer granulators with different vessel sizes was performed using a discrete element method (DEM).