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

Krause, Jennifer and Lisinski, Susanne and Ratke, Lorenz and Schaniel, Dominik and Willert, Ch. and Altmeyer, S. and Woike, Theo and Voges, M. and Klinner, J. (2008) Observation of gelation process and particle distribution during sol-gel synthesis by particle image velocimetry. Journal of Sol-Gel Science and Technology, 45 (1), pp. 73-77. Springer Netherlands. DOI: 10.1007/s10971-007-1624-9. ISSN 0928-0707 (Print) 1573-4846 (Online).

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Official URL: http://www.springerlink.com/content/l6717u66m53m8632/

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.

Document Type:Article
Title:Observation of gelation process and particle distribution during sol-gel synthesis by particle image velocimetry
Authors:
AuthorsInstitution or Email of Authors
Krause, JenniferUniversität zu Köln
Lisinski, SusanneUNSPECIFIED
Ratke, LorenzUNSPECIFIED
Schaniel, DominikUniversität zu Köln
Willert, Ch.Institut für Antriebstechnik
Altmeyer, S.Fachhochschule Köln
Woike, TheoUniversität zu Köln
Voges, M.Institut für Antriebstechnik
Klinner, J.Institut für Antriebstechnik
Date:January 2008
Journal or Publication Title:Journal of Sol-Gel Science and Technology
Refereed publication:Yes
In ISI Web of Science:Yes
Volume:45
DOI:10.1007/s10971-007-1624-9
Page Range:pp. 73-77
Publisher:Springer Netherlands
ISSN:0928-0707 (Print) 1573-4846 (Online)
Status:Published
Keywords:Sol-Gel, Gelation, PIV, BaTiO3
HGF - Research field:Aeronautics, Space and Transport (old)
HGF - Program:Space (old)
HGF - Program Themes:W FR - Forschung unter Weltraumbedingungen (old)
DLR - Research area:Space
DLR - Program:W FR - Forschung unter Weltraumbedingungen
DLR - Research theme (Project):W - Vorhaben Materialwissenschaftliche Forschung (old)
Location: Köln-Porz
Institutes and Institutions:Institute of Materials Physics in Space
Deposited By: Susanne Lisinski
Deposited On:06 Feb 2008
Last Modified:27 Apr 2009 14:43

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