Results 271 to 280 of about 10,773 (300)
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The Effect of Flowagents on the Rheology of a Plastic Powder
Particle & Particle Systems Characterization, 1995AbstractFlow agents are widely used in industry, such as the plastics and pharmaceutical industry, to promote the flow of cohesive powders. Few studies of the quantitative effects of the flow agents on the flow of the powder have been reported. In this communication the effect of silica flow agents on the flow of a plastic powder is studied by means of
Brian H. Kaye +2 more
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Assessment of the effect of Cellets’ particle size on the flow in a Wurster fluid-bed coater via powder rheology [PDF]
Journal of Drug Delivery Science and Technology, 2019 The main objective of this study was to investigate the effect of microcrystalline cellulose (MCC) spheres (Cellets) size effect on the powder properties to assess the possible impact of the Cellets’ size on the powder behaviour in the down-flow bed and ...
Valentyn Mohylyuk +2 more
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Characterization of impregnated particles via powder rheology
Powder Technology, 2009This work presents a specific application of a new powder rheometer prototype, for the characterization of liquid-impregnated particles which are used in chemical engineering for gas treatment on fixed beds. This new type of rheological characterization can provide useful information about the surface state of the particles and could contribute to the ...
Luis F. Madariaga +4 more
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1991
Although many researchers have investigated the rheology of gas-fluidized powders no reliable theoretical description is as yet available. Various measuring methods have been applied, varying from Stormer, Brookfield or Couette viscometers, torsion pendulum or floating/falling ball-methods to the study of average flow velocity through open inclined or ...
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Although many researchers have investigated the rheology of gas-fluidized powders no reliable theoretical description is as yet available. Various measuring methods have been applied, varying from Stormer, Brookfield or Couette viscometers, torsion pendulum or floating/falling ball-methods to the study of average flow velocity through open inclined or ...
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The Rheology and Hydrodynamics of Dry Powder Lubrication
Tribology Transactions, 1991This paper conceptualizes a powder lubrication mechanisms which closely resembles that of a hydrodynamic fluid film. Based on the observations of past investigations and on the author's experiments, it is postulated that a layered shearing of the compacted powder generates velocity, density, and temperature profiles akin to fluid film bearings. Thus, a
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Adsorption, rheology, packing, and sintering of nanosize ceramic powders
Ceramics International, 1999Abstract Nanosize zirconia particles stabilised with a water-soluble polyelectrolyte in an aqueous medium were characterised in terms of adsorption behaviour, suspension rheology, and subsequent green/sintered compact microstructure. A monolayer surface coverage of the particle by adsorption was experimentally verified.
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The Role of Water in the Rheology of Hygroscopic Food Powders
1985The effects of water activity on the biochemical and biological stability of foods have been extensively studied and the results of these investigations can serve as useful guide-lines in processing and storage (7, 25, 27). The effects of water on the physical stability of dry foods have also received considerable attention, especially in sugar rich ...
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Rheology of reactive powder concrete mix - a rewiev
Cement Wapno BetonThe paper presents issues on the rheology of RPC mixtures based on data from the literature. First, the properties of pastes as multiphase systems are described, taking into account their structures and the interacting forces in these systems. The influence of small particles introduced to cement with mineral additives on the rheological properties of ...
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Rheology of silicone-coated ceramic powders
Journal of Materials Science Letters, 1997M. B. NAWAZ, L. J. NEERGAARD
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Rheology of cohesive powders : experiments and modelisation
Rhéologie des poudres cohésives : expériences et modélisation Les milieux granulaires constituent une des ressources primaires les plus utilisées dans le monde, particulièrement dans l’industrie. Parmi la diversité de matériaux granulaires existants, les poudres cohésives constituent l’un des matériaux les plus délicats à manipuler ...openaire +1 more source