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The rheological behavior of aqueous Al2O3/SiC suspensions at different pH values was investigated by rheological measurement. Experimental results showed that at pH = 3–6, Al2O3 and SiC particles have opposite surface charges, and the binary suspensions have lower viscosity than the unary suspensions at shear rates of 0–300 s-1. Furthermore, at pH = 3–12, the stability of the Al2O3 component seemed to dominate the overall rheological behavior of the Al2O3/SiC binary suspensions. The tendency mentioned above showed little variations in various ionic strengths, particle diameters and component fractions.


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Effect of pH on rheology of aqueous Al2O3/SiC colloidal system

Show Author's information Xiaoqing ZHANGYanli ZHANGHan CHENLucun GUO( )
College of Materials Science and Engineering, Nanjing University of Technology, Nanjing 210009, China

Abstract

The rheological behavior of aqueous Al2O3/SiC suspensions at different pH values was investigated by rheological measurement. Experimental results showed that at pH = 3–6, Al2O3 and SiC particles have opposite surface charges, and the binary suspensions have lower viscosity than the unary suspensions at shear rates of 0–300 s-1. Furthermore, at pH = 3–12, the stability of the Al2O3 component seemed to dominate the overall rheological behavior of the Al2O3/SiC binary suspensions. The tendency mentioned above showed little variations in various ionic strengths, particle diameters and component fractions.

Keywords:

alumina, silicon carbide, mixed colloidal dispersion, rheology
Received: 12 December 2013 Revised: 11 March 2014 Accepted: 13 March 2014 Published: 01 June 2014 Issue date: June 2014
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Publication history
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Publication history

Received: 12 December 2013
Revised: 11 March 2014
Accepted: 13 March 2014
Published: 01 June 2014
Issue date: June 2014

Copyright

© The author(s) 2014

Acknowledgements

The authors wish to thank the Program for Changjiang Scholars and Innovative Research Team in University and a project funded by the Priority Academic Program Development of Jiangsu Higher Education Institutions for supporting this research.

Rights and permissions

Open Access: This article is distributed under the terms of the Creative Commons Attribution License which permits any use, distribution, and reproduction in any medium, provided the original author(s) and the source are credited.

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