New developments in particle characterization by laser diffraction: size and shape

Ma, Zhenhua; Merkus, Henk G.; Smet, Jan G. A. E. de; Heffels, Camiel; Scarlett, B. Florence

doi:10.1016/s0032-5910(00)00242-4

Cited by 157 publications

(104 citation statements)

References 21 publications

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“…They are widely used for dense multiphase flows in industrial processes and in microstructures as well, for example for biological cell counting and sizing [6][7][8][9][10][11]. In addition to complex and expensive equipments, the main disadvantage of these techniques is their dependence on the visibility of the measurement volume and on the focal distance.…”

Section: Introductionmentioning

confidence: 99%

In-situ particle sizing at millimeter scale from electrochemical noise: simulation and experiments

Yakdi

Huet

Ngo

2015

Electrochimica Acta

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Over the last few years, particle sizing techniques in multiphase flows based on optical technologies emerged as standard tools but the main disadvantage of these techniques is their dependence on the visibility of the measurement volume and on the focal distance. Thus, it is important to promote alternative techniques for particle sizing, and, moreover, able to work in hostile environment. This paper presents a single-particle sizing technique at a millimeter scale based on the measurement of the variation of the electrolyte resistance (ER) due to the passage of an insulating sphere between two electrodes immerged in a conductive solution. A theoretical model was proposed to determine the influence of the electrode size, the interelectrode distance, the size and the position of the sphere, on the electrolyte resistance. Experimental variations of ER due to the passage of spheres and measured by using a home-made electronic device are also presented in this paper. The excellent agreement obtained between the theoretical and experimental results allows validation of both model and experimental measurements. In addition, the technique was shown to be able to perform accurate measurements of the velocity of a ball falling in a liquid.

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Section: Introductionmentioning

confidence: 99%

In-situ particle sizing at millimeter scale from electrochemical noise: simulation and experiments

Yakdi

Huet

Ngo

2015

Electrochimica Acta

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“…28,29 Three LD and BET measurements of each powder were made, and the limiting size d for the 10% (d 10 ), 50% (d 50 ), and 90% (d 90 ) volume fractions of particles <d are given (Table I). [24][25][26] The morphology of titanium particles was analyzed by scanning electron microscopy (SEM) using a FEI XL 30 Sirion (Eindhoven, The Netherlands) FEG instrument [Figs. 1(a) and 1(b)].…”

Section: A Powder Characterization and Preform Preparationmentioning

confidence: 99%

“…[14][15][16][17] Drawbacks of these methods are that models have to be assumed for the evaluation of the data, like cylindrical pores for MIP, and that the information is spatially not localized [18][19][20] ; moreover, some of the methods are destructive (MB, MIP). [21][22][23][24][25][26][27][28] BET and HP usually give results superior to MB and MIP and have the advantage of being nondestructive. Spatially localized information about porosity and Ti-particle distribution can be obtained from scanning electron microscopy (SEM), but 3D reconstruction from SEM images is tedious and model dependent.…”

Section: Introductionmentioning

confidence: 99%

X-ray computed micro tomography as complementary method for the characterization of activated porous ceramic preforms

et al. 2007

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X-ray computed micro tomography (CT) is an alternative technique to the classical methods such as mercury intrusion (MIP) and gas pycnometry (HP) to obtain the porosity, pore-size distribution, and density of porous materials. Besides the advantage of being a nondestructive method, it gives not only bulk properties, but also spatially resolved information. In the present work, uniaxially pressed porous alumina performs activated by titanium were analyzed with both the classical techniques and CT. The benefits and disadvantages of the applied measurement techniques were pointed out and discussed. With the generated data, development was proposed for an infiltration model under ideal conditions for the production of metal matrix composites (MMC) by pressureless melt infiltration of porous ceramic preforms. Therefore, the reliability of the results, received from different investigation techniques, was proved statistically and stereologically.

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“…in water) causes laser beam dispersion. Furthermore, there are many cases, where laser diffraction is not a proper tool for measurement of dietary fiber, since it is typically for use with particles of oval shape (Ma et al, 2000). Automated static image analysis allows learning about not just the size, but also the shape of particles, which is a crucial aspect in measuring fibers of oblong shape.…”

Section: Introductionmentioning

confidence: 99%

Automated static image analysis as a novel tool in describing the physical properties of dietary fiber

et al. 2015

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The growing interest in the usage of dietary fiber in food has caused the need to provide precise tools for describing its physical properties. This research examined two dietary fibers from oats and beets, respectively, in variable particle sizes. The application of automated static image analysis for describing the hydration properties and particle size distribution of dietary fiber was analyzed. Conventional tests for water holding capacity (WHC) were conducted. The particles were measured at two points: dry and after water soaking. The most significant water holding capacity (7.00 g water/g solid) was achieved by the smaller sized oat fiber. Conversely, the water holding capacity was highest (4.20 g water/g solid) in larger sized beet fiber. There was evidence for water absorption increasing with a decrease in particle size in regards to the same fiber source. Very strong correlations were drawn between particle shape parameters, such as fiber length, straightness, width and hydration properties measured conventionally. The regression analysis provided the opportunity to estimate whether the automated static image analysis method could be an efficient tool in describing the hydration properties of dietary fiber. The application of the method was validated using mathematical model which was verified in comparison to conventional WHC measurement results.Keywords: dietary fiber; particle size; hydration properties; automated static image analysis.Practical Application: Automated static image analysis could measure precisely the dietary fiber in dry and wet environment which could be a valuable tool for describing the water-holding properties of dietary fiber.

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New developments in particle characterization by laser diffraction: size and shape

Cited by 157 publications

References 21 publications

In-situ particle sizing at millimeter scale from electrochemical noise: simulation and experiments

In-situ particle sizing at millimeter scale from electrochemical noise: simulation and experiments

X-ray computed micro tomography as complementary method for the characterization of activated porous ceramic preforms

Automated static image analysis as a novel tool in describing the physical properties of dietary fiber

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