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Characterization of Pyrogenic Powders with Conventional Particle Sizing Technique: II. Experimental Data
Author(s) -
Babick Frank,
Vorbau Manuel,
Stintz Michael
Publication year - 2012
Publication title -
particle and particle systems characterization
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.877
H-Index - 56
eISSN - 1521-4117
pISSN - 0934-0866
DOI - 10.1002/ppsc.201000025
Subject(s) - aggregate (composite) , sizing , dynamic light scattering , fumed silica , gyration , particle (ecology) , radius of gyration , particle size distribution , characterization (materials science) , biological system , materials science , light scattering , particle size , scattering , statistical physics , mathematics , optics , chemistry , physics , composite material , nanotechnology , polymer , geometry , oceanography , organic chemistry , geology , nanoparticle , biology
When the impact of an aggregate's structure on its physical properties is adequately accounted for, it is possible to use those properties for quantifying the structure. A recent paper [1] has discussed such structure‐property‐relationships for pyrogenic powders. Based on them a calculation scheme is proposed that allow the analysis of size distributions from Dynamic Light Scattering (DLS) and Optical Centrifugation Analysis (OCA) with regard to the translational hydrodynamic diameter, the diameter of gyration and the aggregation number. The scheme includes the conversion from optically weighted to number weighted distributions. The performance of this calculation scheme is tested for different grades of fumed silica, which were analyzed by two DLS and one OCA instrument. A fairly good agreement is observed with regard to medians of the distribution functions. The paper shows that differences in size distributions obtained by different measurement techniques may not only explained qualitatively but can even quantitatively traced back to distribution functions of structural aggregate parameters.