Showing papers in "Advanced Powder Technology in 2001"

TL;DR: In this article, the effects of heating rate and gas flow rate on the quality of the debound part in terms of defects, mass of binder removed and residual carbon level were discussed.

TL;DR: In this paper, the structure of Laponite XLG clay suspension and the gelation process were reported using both dynamic light scattering (DLS) and small-angle X-ray scattering methods.

TL;DR: In this article, the effects of the particle feed rate, initial concentration of the components in the feed mixture and the number of components ( l = 2-5; particle diameters between 0.174 and 1.66 mm) were examined on the segregation pattern in a two-dimensional silo.

TL;DR: In this paper, the particle size distributions obtainede using the improved sedimentation balance and microscopic methods are nearly equal for the three kinds of glass beads, however, in the case of large particle diameters, particle sizes measured by the improved SBE method are larger than those obtained by the microscopic method.

TL;DR: In this paper, a new method to determine the refractive index of particles is applied for several sample powders (polystyrene latex, glass beads, etc.) and the usefulness of this new method is confirmed.

TL;DR: In this paper, the effect of relative humidity on the elutriation rate of fine-coarse particle mixtures in a fluidized bed was investigated in a steady state.

TL;DR: In this article, the effects of three vibrational modes (twist, vertical and horizontal) on flow patterns are discussed and the effect of vibrational mode on the flow patterns appears in whole bed motion.

TL;DR: In this article, the experimental wall pressure fluctuations in swirling gas-solid two-phase flows are analyzed by statistical analysis and wavelet transform, and it is shown that the amplitude of pressure fluctuation in the axial flow is larger than that of the swirling gas solid flow at low gas velocity.

TL;DR: In this article, the rehydroxylation reaction of siloxane bridges was studied for silica gel particles dehydrated by preheating, and the amount of total adsorption and irreversible adsorptions were examined against the pre-heating temperature and vapor pressure.

TL;DR: In this paper, the disorder of hexagonal close packing was measured using several transportation metrics, including the average local angular disorder (ALA) and the local angular norm (LOR).

TL;DR: In this paper, the expansion of free bubbling gas fluidized beds has been investigated experimentally in a two-dimensional perspex-walled bed, where glass beads were fluidized with dried air at varying gas velocities, while the bed was vibrated at different frequencies, amplitudes and directions to study their effects on the fluidization quality.

TL;DR: In this article, the apparent buoyancy of a lead sphere in a fluidized bed is calculated by measuring the difference between the weight in the bed and the one in the atmosphere.

TL;DR: In this article, a model based upon both viscoelastic and two-phase theories has been developed to predict the dissipation energy of binary mixtures packed naturally at low acceleration levels.

TL;DR: In this article, the effects of particle properties, including particle shape, on packing characteristics of particles with tapping, changes in the void fraction in a tapping particle bed were measured using some materials differing in particle shape and density ρ.

TL;DR: In this article, the authors compared the reactivity and stability of epoxy-functionalized latex made by the miniemulsion polymerization process with Ep850 and that made by a conventional emulsion polymerisation process with glycidyl methacrylate (GMA), and quantified by Fourier transform-IR spectrometry.

TL;DR: In this article, the authors investigated the rate of reactions on silica surfaces for the alkoxylation and hydrolysis of alkoxyl groups and determined the apparent rates based on the total number of surface groups.

TL;DR: In this article, the efficiency of fibrous filters using numerical simulation and X-ray computerized tomography (XCT) has been analyzed and it was found that larger particles form bridges and can improve the collection for smaller particles during the filtration time.

TL;DR: In this article, a simple and practical engineering model of particle formation by homogeneous and heterogeneous nucleation in the liquid phase has been proposed, which can predict the number concentration of nucleated particles as a function of the operating conditions.

TL;DR: In this paper, a high-speed rotor mixer was used to ground a small amount of particulates under atmospheric conditions to evaluate the performance of the mixer, and the median diameter of the ground sample decreased with an increase in both rotational speeds of the rotor and the vessel, and with a decrease in the clearance in the working space.

TL;DR: In this article, the Monte-Carlo simulation method was used to study capillary-induced fluid motions in an isotropic powder-embedded porous matrix, where the concept of random walk and a two-block hexagonal network model were employed to accomplish the simulation procedures.

TL;DR: In this paper, the mean values of two shape indices (circularity ϕ and smoothness ζ) were calculated using model ellipsoidal particles, and it was confirmed that the R method could more effectively evaluate particle shapes than can the S method, based on the results of the S/C method.

TL;DR: A compaction tester of wet kneaded masses has been developed and the compression properties of the masses are characterized by a pressure transmission between the upper and lower punches of the tester as discussed by the authors.

TL;DR: In this paper, the influence of flow parameters on self-diffusion in a vibrated granular bed was studied by simulation and experiment using image processing technology and a particle tracking method, the local displacements and velocities of particles were measured.

TL;DR: In this article, the role of water and sodium bis (2-ethylhexyl) sulphosuccinate (AOT) molecules on the adhesive force between a mica plate and a SiO2-surface in cyclohexane was investigated at the molecular level using an atomic force microscope.

TL;DR: In this article, the integral heat of hydration of preheated gibbsite was investigated in an aqueous milieu and it was shown that continuous milling without cooling reduces the degree of activation down to 1/10.

TL;DR: The contribution of particle structure to the viscosity of a SiO 2 -filled epoxy resin system could be revealed as one of the intrinsic properties of SiO2 by using transparent optical microscopy with normal/cross-polarized lights.

TL;DR: In this article, the authors investigated the kinetics of growth for the coating of particles in top spraying fluidized bed systems and found that only a small amount of particles that visited the spraying region are coated at a time.

TL;DR: In this paper, the authors investigated the growth of silica particles produced by the hydrolysis of tetraethoxy silane (TEOS) in gels of the cationic surfactant, cetyltrimethyl ammonium bromide (CTAB), by static light scattering and dynamic light scattering measurements.

TL;DR: In this paper, the authors investigated how the degree of grinding influenced the concentration of celestite, and the results obtained show that, although recovery percentages are low, the concentration in the concentrate is approximately 70 mass%.

TL;DR: In this paper, a wet classification of various fine calcite materials (<8, <12 and <45 μm) by a diskstack nozzle centrifuge is presented and the results are discussed with respect to feed size.