Relative Colloidal Stability in Ethanol of Powders with Si-O Surface Species

Autor:	Yoko Fukada, Patrick S. Nicholson
Rok vydání:	2004
Předmět:	Chemistry Mineralogy Binary compound Suspension (chemistry) Colloid Viscosity Electrokinetic phenomena chemistry.chemical_compound Chemical engineering visual_art Materials Chemistry Ceramics and Composites Zeta potential visual_art.visual_art_medium DLVO theory Ceramic
Zdroj:	Journal of the American Ceramic Society. 85:2945-2948
ISSN:	0002-7820
DOI:	10.1111/j.1151-2916.2002.tb00560.x
Popis:	The relative colloidal stability in ethanol of ceramic powders with Si-O surface groups (Si 3 N 4 , SiC, and MoSi 2 ) is reported. SiO 2 /EtOH suspensions are also examined as a reference. The comparative relationships between pH, particle-surface charge, zeta potential, stability, and suspension rheology are discussed. The nature and influence of the surface species are determined, and the similarities and differences are compared. DLVO theory was used to define suspension stability, and it was found that non-oxide particles in EtOH are charge-stabilized and have viscosity and flow curves that agree with the electrokinetic measurements.
Databáze:	OpenAIRE
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