Effect of particle size on colloidal zirconia rheology at the isoelectric point
- Univ. of Melbourne, Parkville (Australia)
This paper examines the effects of particle concentration and size on the yield stress of ZrO{sub 2} suspensions at a well-defined surface chemistry condition of the isoelectric point (IEP). At the IEP, the relationship between yield stress {tau}{sub y{sub max}} and particulate volume fraction {phi}{sub s}, and mean particle size d was evaluated to be {tau}{sub y{sub max}} = K {phi}{sub s}{sup 4.0}/d{sup 2.0}. The difference in size distribution of the various ZrO{sub 2} suspensions examined causes some degree of scatter in the data used to establish the {tau}{sub y{sub max}}, {phi}{sub s}, and d relation. The use of particle concentration n{sub t} based on the fine size fraction instead of volume fraction {phi}{sub s} provided a better correlation, because the fine particles govern the properties of the flocculated network structure.
- Sponsoring Organization:
- USDOE
- OSTI ID:
- 106012
- Journal Information:
- Journal of the American Ceramic Society, Journal Name: Journal of the American Ceramic Society Journal Issue: 8 Vol. 78; ISSN 0002-7820; ISSN JACTAW
- Country of Publication:
- United States
- Language:
- English
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