The characteristics of alumina powder and the effect of dispersant on the rheological properties of slurry
(1) At low shear rates, the shear stress and apparent viscosity of the micropowder slurry with the largest d50 and the widest particle size distribution range are the smallest, and the shear stress and apparent viscosity of the micropowder slurry with the smallest d50 and the narrowest particle size distribution range Maximum viscosity
(2) The calculation results of the grey correlation degree show that the yield stress, viscosity coefficient and apparent viscosity of the reference slurry are highly correlated with the pH and d10 of the alumina powder. However, the correlation degree did not reach 0.9, indicating that the rheological properties of the slurry are affected by multiple factors. Adding a dispersant makes the correlation between the above-mentioned rheological properties of the slurry and the properties of alumina powder change in different ranges.
(3) Among the three dispersants, the carrier-free and alumina-based polycarboxylate-based dispersants have a better dispersion effect on activated alumina powder slurry, and the cement-based polyacrylate-based dispersants Poor dispersion effect.
