High-temperature flow behavior of ceramic suspensions

The objective of this study was to investigate the effects of temperature a nd solids loading on the viscosity of two nonaqueous ceramic suspensions. I n this article, the viscosity of Al2O3 suspensions with 5%-50% solids loadi ng and hydroxyapatite suspensions aith a solids loading of 5%-40% were meas ured at temperatures of 25 degrees, 45 degrees, 65 degrees, and 75 degrees C, The high-shear Newtonian viscosity at various temperatures was reduced t o a single curve by the reduced viscosity and the temperature-adjusted soli ds volume fraction of the suspensions, The Krieger-Dougherty model, with th e intrinsic viscosity corrected for particle geometry, was fitted to the da ta and was observed to provide a satisfactory description to the solids-loa ding-viscosity data for both suspensions.