Role of particle dissolution in the stability of binary yttria-silica colloidal suspensions

Journal Article · Wed May 01 00:00:00 EDT 1996 · Journal of the American Ceramic Society

DOI:https://doi.org/10.1111/j.1151-2916.1996.tb08576.x· OSTI ID:253560

Yasrebi, M; Kemp, W; Sturgis, D H ^[1]; Ziomek-Moroz, M ^[2]

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1. Precision Castparts Corp., Portland, OR (United States)
2. Oregon Graduate Inst., Beaverton, OR (United States). Dept. of Materials Science and Engineering

The stability of yttria-silica binary aqueous colloidal suspensions is examined as a function of time. It has been observed that initially stable silica particles go through a flocculation period and then restabilize. This phenomenon is attributed to slow dissolution and the specific adsorption of trivalent yttrium cation and its hydroxo complexes on the surface of silica. Furthermore, it is shown that the kinetics of flocculation and restabilization can be controlled by pH adjustment.

• Sponsoring Organization: USDOE
• OSTI ID: 253560
• Journal Information: Journal of the American Ceramic Society, Journal Name: Journal of the American Ceramic Society Journal Issue: 5 Vol. 79; ISSN 0002-7820; ISSN JACTAW
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
ADSORPTION
AGING
FLOCCULATION
KINETICS
MOBILITY
PARTICLE SIZE
PH VALUE
POWDERS
PROCESSING
SILICA
SURFACE AREA
SURFACES
VISCOSITY
WATER
YTTRIUM OXIDES