Powder grinding and nano-particle sizing: Sound, light and enlightenment
authors Camargo, WF; Mantas, PQ; Segadaes, AM; Cruz, RCD
nationality International
journal POWDER TECHNOLOGY
author keywords Quartz; Particle size measurement; Electro-acoustic spectroscopy; Dynamic light scattering; X-ray crystallite size; Surface area
abstract In this work, a sub-micron quartz powder produced by high energy grinding was used to explore the information contained in the particle size distribution (PSD) curves obtained by electro-acoustic spectroscopy (EAS) and dynamic light scattering (DLS). Results show that although the customarily volume-based PSD curve and its median value (d(50) = 135 nm) are more amenable to differences in measurement phenomena and sample preparation methods, the area and number-based representations are more sensitive to the presence of finer particles (35 and 65 nm, respectively for the number and area-based curves obtained by EAS). These values were supported by the crystallite size calculated from X-ray diffraction (d = 44 nm) and the equivalent spherical diameter calculated from specific surface area measurements (d = 43 nm). Thus, a reliable description of the particle size of a powder requires the use of complementary techniques, suggested by the envisioned application or the particular stringency of a given processing step. (C) 2021 Elsevier B.V. All rights reserved.
publisher ELSEVIER
issn 0032-5910
isbn 1873-328X
year published 2021
volume 383
beginning page 348
ending page 355
digital object identifier (doi) 10.1016/j.powtec.2021.01.059
web of science category 8
subject category Engineering, Chemical
unique article identifier WOS:000631782500010
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