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/
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.
|Title:||Observation of gelation process and particle distribution during sol-gel synthesis by particle image velocimetry|
|Journal or Publication Title:||Journal of Sol-Gel Science and Technology|
|In ISI Web of Science:||Yes|
|Page Range:||pp. 73-77|
|ISSN:||0928-0707 (Print) 1573-4846 (Online)|
|Keywords:||Sol-Gel, Gelation, PIV, BaTiO3|
|HGF - Research field:||Aeronautics, Space and Transport|
|HGF - Program:||Space|
|HGF - Program Themes:||W FR - Forschung unter Weltraumbedingungen|
|DLR - Research area:||Space|
|DLR - Program:||W FR - Forschung unter Weltraumbedingungen|
|DLR - Research theme (Project):||W - Vorhaben Materialwissenschaftliche Forschung (old)|
|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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