Effect of Particle Size on Colloidal Zirconia Rheology at the Isoelectric Point

Yee‐Kwong ‐K Leong, Peter J. Scales, Thomas W. Healy, David V. Boger

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This paper examines the effects of particle concentration and size on the yield stress of ZrO2 suspensions at a well‐defined surface chemistry condition of the isoelectric point (IEP). At the IEP, the relationship between yield stress τYmax and particulate volume fraction φs and mean particle size d was evaluated to be τYmax =Kφs4.0/d2.0. The difference in size distribution of the various ZrO2 suspensions examined causes some degree of scatter in the data used to establish the τYmax, φs, and d relation. The use of particle concentration nt based on the fine size fraction instead of volume fraction φs provided a better correlation, because the fine particles govern the properties of the flocculated network structure.

Original languageEnglish
Pages (from-to)2209-2212
Number of pages4
JournalJournal of the American Ceramic Society
Issue number8
Publication statusPublished - 1 Jan 1995
Externally publishedYes


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