Thermal conductivity of concentrated colloids in different states
- Shalkevich, Natallia Institut de Physique, Laboratoire de chimie physique des surfaces, Universit de Neuchâtel, Switzerland
- Shalkevich, Andrey Adolphe Merkle Institute and Fribourg Center for Nanomaterials, University of Fribourg, Switzerland
- Brügi, Thomas Institut de Physique, Laboratoire de chimie physique des surfaces, Universit de Neuchâtel, Switzerland - Physikalisch-Chemisches Institut, Ruprecht-Karls-Universitt Heidelberg, Germany
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11.05.2010
Published in:
- Journal of Physical Chemistry C. - 2010, vol. 114, no. 21, p. 9568–9572
English
The thermal conductivity of concentrated colloids in fluid, glass, and gel states was analyzed. SiO₂ colloids at 10−31 vol % and Al₂O₃ colloids at 4.8 vol % in the fluid, the gel, and the glassy states were studied by dynamic light scattering, rheology, and transmission electron microscopy. Thermal conductivity of the three states was measured as a function of volume fraction. For the fluid and gel states the thermal conductivity increases almost linearly with concentration, reaching roughly 18% enhancement for silica at a volume fraction of 31 vol %. In contrast, in the glass state thermal conductivity strongly decreases with increasing volume fraction.
- Faculty
- Faculté des sciences et de médecine
- Department
- AMI - Soft Nanoscience
- Language
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- English
- Classification
- Physics
- License
- License undefined
- Identifiers
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- RERO DOC 20627
- DOI 10.1021/jp910722j
- Persistent URL
- https://folia.unifr.ch/unifr/documents/301651
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