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Model for Rheology of Halloysite Suspensions
Author(s) -
KENT RAYMOND C.,
GORDON RONALD S.,
HAHN SANG J.
Publication year - 1968
Publication title -
journal of the american ceramic society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.9
H-Index - 196
eISSN - 1551-2916
pISSN - 0002-7820
DOI - 10.1111/j.1151-2916.1968.tb13855.x
Subject(s) - halloysite , rheology , viscosity , logarithm , materials science , newtonian fluid , flow (mathematics) , volumetric flow rate , volume fraction , thermodynamics , mineralogy , chemical engineering , chemistry , composite material , mechanics , mathematics , physics , mathematical analysis , engineering
A quantitative rheological model was developed for predicting the non‐Newtonian flow behavior of aqueous halloysite suspensions. Halloysite clay from the large Utah deposits was used for this investigation because of its unique tubular morphology. The flow behavior of the suspensions was characterized by the semi empirical Ree‐Eyring generalized viscosity equation. The β parameter in the Ree‐Eyring equation, a measure of the relaxation time for the flow process, was very sensitive to variations in the pH and volume fraction solids. When the logarithm of 0 was plotted versus pH (4 to 11) for halloysite suspensions containing 15, 20, and 25 wt% solids, linear plots with increasing slopes were obtained. Attempts were made to show the physical significance of the parameters introduced in the model.