Particle network re-structuring in highly-concentrated ceramic suspensions

Dean-Mo LIu*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

1 Scopus citations

Abstract

In this study, the restructuring behavior of particle networks in highly-concentrated zirconia-wax suspensions as model suspensions is investigated in terms of temperature and solids concentration. The restructuring kinetics is analytically determined such that it can be formulated by a linear correlation between the relative viscosity (ηr) of the suspensions and the logarithmic time (t) of isothermal annealing. Upon restructuring, a gelling point tgel, defined as the time period of which the discrete particle networks in the pre-sheared suspensions are observed to start to form a continuous structure. Above tgel, a sharp increase in suspension viscosity is commonly observed. The tgel varies as a function of both temperature and solids concentration, the temperature effect provides valuable information for a better understanding of the restructuring behavior from an energy viewpoint. The influence of solids concentration, i.e., the tgel decreased linearly with increasing solid concentration, suggests a stronger interparticle attraction that further accelerates flocculation.

Original languageEnglish
Pages (from-to)5653-5659
Number of pages7
JournalJournal of Materials Science
Volume35
Issue number22
DOIs
StatePublished - 1 Nov 2000

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