Surface Chemistry and Rheology of Electrostatically (Ionically) Stabilized Alumina Suspensions in Polar Organic Media

Alumina particles were dispersed in ethanol (EtOH) and dimethyl sulfoxide (DMSO). The surface chemistry and interparticle forces were manipulated by controlling the ionic strength of the suspensions without dispersants. The effects of the chemical nature of the solvents and the concentration of disp...

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Bibliographic Details
Published in:Journal of the American Ceramic Society 1999-04, Vol.82 (4), p.849-856
Main Authors: Wang, Gonghou, Sarkar, Partho, Nicholson, Patrick S.
Format: Article
Language:English
Subjects:
Aluminum oxide
Applied sciences
Building materials. Ceramics. Glasses
Ceramic industries
Ceramics
Chemical industry and chemicals
Exact sciences and technology
General studies
Media
Rheology
Surface chemistry
Technical ceramics
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Summary:Alumina particles were dispersed in ethanol (EtOH) and dimethyl sulfoxide (DMSO). The surface chemistry and interparticle forces were manipulated by controlling the ionic strength of the suspensions without dispersants. The effects of the chemical nature of the solvents and the concentration of dispersed particles on the suspension rheology were evaluated. It was observed that the viscosity of suspensions decreased with increasing salt concentration. Solvent type also had a marked influence on the suspension rheology. Interparticle interactions were calculated and used to describe the rheological behavior.
ISSN:0002-7820
1551-2916
DOI:10.1111/j.1151-2916.1999.tb01845.x