Journal of Sol-Gel Science and Technology

, Volume 45, Issue 1, pp 73–77 | Cite as

Observation of gelation process and particle distribution during sol–gel synthesis by particle image velocimetry

  • J. Krause
  • S. Lisinski
  • L. Ratke
  • D. Schaniel
  • C. Willert
  • S. Altmeyer
  • Th. Woike
  • M. Voges
  • J. Klinner
Original Paper

Abstract

The gelation of alcogels mixed with microparticles of the nonlinear optical material BaTiO3 was studied with Particle Image Velocimetry (PIV). It is shown that the distribution of the microparticles in the gel is homogeneous and that the gelation occurs continuously throughout the gel body. We demonstrate that PIV is a useful method to study the gelation kinetics: The transition from a colloidal solution to a gel can be measured without any assumption on the rheology of the colloidal solution. The detected linear decrease of the flow velocity with time is described as the linear part of the critical behavior.

Keywords

Sol–gel Gelation process Particle distribution Particle image velocimetry (PIV) Microparticles 

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Copyright information

© Springer Science+Business Media, LLC 2007

Authors and Affiliations

  • J. Krause
    • 1
  • S. Lisinski
    • 1
  • L. Ratke
    • 1
  • D. Schaniel
    • 2
  • C. Willert
    • 3
  • S. Altmeyer
    • 4
  • Th. Woike
    • 2
  • M. Voges
    • 3
  • J. Klinner
    • 3
  1. 1.Institut für Materialphysik im WeltraumGerman Aerospace Center DLRKolnGermany
  2. 2.1. Physikalisches InstitutUniversität zu KölnKolnGermany
  3. 3.Institut für AntriebstechnikGerman Aerospace Center DLRKolnGermany
  4. 4.Institut für angewandte Optik und Elektronik, Fachhochschule KölnKolnGermany

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