Showing papers in "Advanced Powder Technology in 2005"

TL;DR: In this article, the effects of sphericity and Reynolds number of a particle on its drag coefficient were investigated. But the results of the experiments were limited to a wide range of shapes including spheres, cube octahedrons, octahedral cylinders, cylinders, rectangular parallelepipeds and others.

TL;DR: In this article, the authors describe the state of the art in the area of pharmaceutical powder technology and suggest a kind of "road map" to achieve as fast as possible the top of the knowledge pyramid.

TL;DR: In this article, the aerodynamics of particles and heat transfer of gas-to-particles in a two-dimensional spouted bed (2DSB) with draft plates are investigated by the discrete element method.

TL;DR: In this article, a planetary ball mill was used to investigate the dechlorination reaction during the grinding of polyvinyl chloride (PVC) powder with one of two dried alkaline additives.

TL;DR: A review of the patent literature on GM-BF/A equipment with sidewalls provided with a number of louvers or screenless granular moving bed systems is provided in this article.

TL;DR: In this article, the hydrodynamics and flow regime transitions in a circulating fluidized bed (CFB) were studied, where the flow regime depends on both the solids circulation rate and gas velocity.

TL;DR: In this paper, the results are analyzed in the light of elastic-plastic interparticle contact deformation theory incorporating fundamentals of fine powder adhesion and consolidation in flow behavior characterization, and the correlation coefficient values for the comparison are found to be in the range of 0.96-0.99 indicating the satisfactory nature of the above parameters in explaining the flow behavior.

TL;DR: The characteristics of gas-solid flow after a 90° vertical-to-horizontal elbow, where the flow in the vertical pipe is upward, were investigated both numerically and experimentally for low conveying gas velocities as discussed by the authors.

TL;DR: The strength and morphology of granules generated by high shear agglomeration of powder with a highly viscous surfactant paste were investigated as a function of mixing time and powder particle size as discussed by the authors.

TL;DR: In this article, the classification size ratio (CSR) is defined as (Dv(10) of the coarse part)/(dv(90) of fine part).

TL;DR: In this paper, an investigation into the characteristics of a gravity-driven conveyor system for passing crushed ore through a microwave cavity has been undertaken using laboratory experiments and numerical modeling, using a crushed copper ore from the Palabora mine, South Africa.

TL;DR: In this article, a study was conducted on the flotation with oleic acid of sedimentary phosphates from Sierra Espuna, in the province of Murcia (Spain), also comprising an analysis of the kinetic considerations governing the operation.

TL;DR: The porosities and saturation levels of high shear mixer agglomerates, containing zeolite powder bound with a highly viscous surfactant paste [linear alkylbenzene sulphonate (LAS)], were determined as a function of mixing time by performing a series of simple liquid immersion experiments.

TL;DR: In this paper, a computer program using the molecular dynamics and lattice Boltzmann (D2Q9 and D3Q19) methods was applied for simulation of the behavior of powder structures exposed to current fluid forces.

TL;DR: In this article, the electrochemical characteristics of Mg2Ni-Ni alloys prepared by mechanical alloying (MA) using a planetary ball mill were investigated, and the discharge capacity depends on the molar ratio in Ni and Mg 2Ni, and it has a maximum value of about 480 mAh/g at the equimolar ratio of Ni/Mg 2 Ni.

TL;DR: In this article, the effect of polarity change in the electrostatic charge of particles impacting on a rotating metal target has been investigated using a unit of coaxial dual tubes, where the initial charge is hardly generated before impacting on the rotating metal targets.

TL;DR: In this paper, the electron spin resonance (ESR) was used to measure the free radicals induced by fine grinding of a-lactose monohydrate by means of ESR spectra.

TL;DR: In this paper, a simulation model to predict the dynamic behavior of large aggregates in flows was developed, in which the effective particle surface exposed to the flow was evaluated and the reduction of fluid velocity due to neighboring particles was taken into account.

TL;DR: In this article, the porosity variation with the control volume affects the wick debinding process, and the present numerical simulation shows the walking flow edges behave randomly, the contours of the wetting wick are irregular and the total debinding time is linearly dependent on the radius of the compact.

TL;DR: The microstructure and morphology of these cores and the silica layers were examined by high-resolution transmission electron microscopy, and electron and X-ray diffraction analysis as discussed by the authors.

TL;DR: A photo-bioreactor for an electron transfer system using a photocatalyst combined with enzymes is proposed by the use of a ceramic membrane separating photocatalysis from biocatalysis to allow highly selective production of enzymes without denaturation of the enzyme due to direct light irradiation as discussed by the authors.

TL;DR: In this article, the size of gold nanoparticles was investigated as a function of the reduction rate of the gold ions, and it was found that the size was changed by reduction rate.

TL;DR: In this article, spherical silica particles were dispersed in polyamic acid varnish (PAAV) solution, and ultrasonic wave irradiation resulted in high-speed condensation of conversion to polyimide and in coating of the particles.

TL;DR: In this paper, the viscosity of solder paste with three kinds of solder particles (original, deformed and coated Sn-Zn-Bi alloy particles) has been investigated by capillary rheometry.

TL;DR: In this article, the detailed characteristics of the layers of water molecules, ions and hydrated ions adsorbed on surfaces in NaCl solutions were investigated by introducing the dynamic method in the use of atomic force microscopy (AFM).

TL;DR: In this paper, the authors investigated the flow patterns and wall stresses in a two-dimensional moving granular filter bed with a curved and symmetric louvered wall, where a digital camcorder was used to record the flow pattern histories of the granular solids.

TL;DR: In this article, the porosity of the compact is measured from the digital image of the pore structure and a local porosity distribution (LPD) and typical length scales are calculated by the maximum entropy method.

TL;DR: In this paper, the air velocity profile was estimated by combining both results of air pressure and particle velocity measurements on the basis of Ergun's equation and a previously developed mathematical model, respectively.

TL;DR: In this article, a vertical pneumatic conveyor is designed for holding a 85mm inner diameter pipeline, and the corresponding optical tomography sensor uses a parallel beam projection approach with an IR light source so that the sensor is free of noise from any surrounding visible light source.

TL;DR: In this paper, a simple but effective attrition method for preparing nano-scale magnetic Ni powder is proposed, where a rotating magnetic field was employed to drive the Ni particles in a measuring glass filled with pure water.