Chapter 115. Particle Size Distribution of Fumed Silica Agglomerates at Low Shear Stress

  1. Prof. Dr. Norbert Auner4 and
  2. Prof. Dr. Johann Weis5
  1. Michael Stintz1,
  2. Herbert Barthel2,
  3. Mario Heinemann2 and
  4. Johann Weis3

Published Online: 5 MAY 2008

DOI: 10.1002/9783527619924.ch115

Organosilicon Chemistry V: From Molecules to Materials

Organosilicon Chemistry V: From Molecules to Materials

How to Cite

Stintz, M., Barthel, H., Heinemann, M. and Weis, J. (2003) Particle Size Distribution of Fumed Silica Agglomerates at Low Shear Stress, in Organosilicon Chemistry V: From Molecules to Materials (eds N. Auner and J. Weis), Wiley-VCH Verlag GmbH, Weinheim, Germany. doi: 10.1002/9783527619924.ch115

Editor Information

  1. 4

    Department of Inorganic Chemistry, University of Frankfurt, Marie-Curie-Straße 11, 60439 Frankfurt am Main, Germany

  2. 5

    Consortium of Electrochemical Industry GmbH, Zielstattstraße 20, 81379 Munich, Germany

Author Information

  1. 1

    Technische Universität Dresden, Institut für Verfahrenstechnik, Zentrum für Partikeltechnik/Granulometrie, D-01062 Dresden, Germany Tel.: 449 351 463 35176 — Fax: +49 351 463 37058

  2. 2

    Wacker-Chemie GmbH, Werk Burghausen, D-84480 Burghausen, Germany

  3. 3

    Consortium für elektrochemische Industrie GmbH, Zielstattstr. 20, D-81379 Miinchen, Germany

Publication History

  1. Published Online: 5 MAY 2008
  2. Published Print: 26 SEP 2003

ISBN Information

Print ISBN: 9783527306701

Online ISBN: 9783527619924

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Keywords:

  • particle size;
  • fumed silica;
  • powder handling

Summary

An experimental study has been undertaken to give guidelines for assessing particle size measurements for non-monodisperse, non-spherical, highly agglomerated particles such as pyrogenic (fumed) silicas under technical handling conditions, i.e., high solid concentrations and low shear stress. Contrary to common dry powders, the agglomerates have the relevant particle sizes to describe this colloidal system best. Conventional particle size methods often lead to destruction of the sample by applying high dispersion forces, or they are performed at extreme dilution. None of them reproduces the relevant particle size of pyrogenic silicas.