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In situ surface modification of silicon carbide particles using Al3+ complexes and polyelectrolytes in aqueous suspensions

journal contribution
posted on 23.01.2007, 09:40 by Yongheng Zhang, J.G.P. Binner
Silicon carbide (SiC) particles were modified in situ, using Al3+ complexes in aqueous media, via control of Al(NO3)3 concentration and pH. The Al3+ formed hydrolyzed complexes that adsorbed onto the charged sites on the SiC particle surfaces. As a result, the surface-modified SiC particles behaved in an alumina-like manner in the approximate pH range 5–8. The modified SiC particles were further treated with two types of polyelectrolytes that were sequentially adsorbed onto the particle surface, to give a maximum surface charge. As a result of this surface-modification process, the SiC could be dispersed with Al2O3 in aqueous media without heteroaggregation.

History

School

  • Aeronautical, Automotive, Chemical and Materials Engineering

Department

  • Materials

Pages

139534 bytes

Citation

ZHANG, Y. and BINNER, J.G.P., 2002. In situ surface modification of silicon carbide particles using Al3+ complexes and polyelectrolytes in aqueous suspensions. Journal of the American Ceramics Society, 85(3), pp. 529-534

Publisher

© Blackwell

Publication date

2002

Notes

This is Restricted Access. This article was published in the journal, Journal of the American Ceramics Society [© Blackwells] and is also available at: www.blackwellpublishing.com/jace.

Language

en

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