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Introduction to Particle Science
Published in R. P. Donovan, Particle Control for Semiconductor Manufacturing, 2018
Although these definitions are convenient and often used, particles characterized through an equivalent spherical diameter such as light-scattering diameter or aerodynamic diameter need not actually be spherical. For example, a fiber with an equivalent light scattering diameter of 0.5 μm would be larger than 0.5 μm in some dimensions and smaller than 0.5 μm in other dimensions. This distinction can be important if one property of a particle, such as its ability to scatter light, is used as a surrogate for another particle property such as its ability to bridge the conducting pathways on a semiconductor chip.
Hydrodynamic-Solid Films Continuum
Published in Hooshang Heshmat, Tribology of Interface Layers, 2010
Size and shape. Of the numerous features that characterize a compacted powder, size and shape of the solid particles are the most elementary. It is, perhaps, arguable whether size can at all be specified by a single number; not only conceptually, but experiments, too, yield different values depending on the measurement technique used. Most commonly, the notion of an equivalent spherical diameter is used. At least half a dozen of these can be formulated, namely,
Modeling energy requirements in planetary ball milling of rice grain
Published in Particulate Science and Technology, 2022
M. A. Loubes, L. C. González, M. P. Tolaba
White long rice grains IRGA 417 (12% dry basis moisture content and 28.4 g of amylose/100 g of dry matter) provided by a local manufacturer (La Arrocera Argentina S.A., Argentina) were screened to remove foreign matter and stored in sealed containers at −20 °C. Samples were tempered at room temperature before milling tests. The equivalent spherical diameter (2860 ± 40 µm) was obtained by pycnometry, with cyclohexane as fluid, based on the volume of 50 grains.
Temporal and spatial characteristics of flocculated suspended solids in a deep reservoir: an in situ observation in the Biliuhe Reservoir
Published in Environmental Technology, 2023
Yuyu Liu, Yuqing Feng, Xin Jiang, Shiguo Xu, Lin Zhu, Guoqing Sang
We took the equal-area spherical diameter (ESD), which was measured by an optical microscope, as the equivalent spherical diameter. To prevent the subsampling process from destroying the form of suspended solids, we used a micropipette with the tip cut off to suck up 0.1 ml of samples, slowly dropped it on a glass slide, and placed it under a microscope (Chongqing Auto SMART, China) to observe the shape and structure of flocs.