Effect of Volume Loading by varying the Particle Size in Well Dispersed Alumina Suspension using Non-Aqueous Solvent

Abstract- The dependence of viscosity behavior on volume loadings of well dispersed Alumina – polyvinyl butyral (Al-PVB) tape casting slurry by varying particle sizes has been studied at constant shear rate 4 sec-1 with the help of a conventional couette device. The slurry under constant shear rate showed an interesting behavior of suspensions with time and volume change by varying the particle size. From the experimental study, it has been observed that on increasing the volume loadings of the suspensions, viscosity also increased; however the rate of increase in viscosity in beginning is much more at constant shear rate 4sec-1. Finally the results obtained from rheological measurements indicated that at constant shear rate, shear induced hydrodynamic diffusion plays an significant role for the successful exploitation of time dependant viscosity profile of the suspensions. Keywords- Alumina Suspensions, shear induced diffusion, particle size distribution, volume loading, rheology. I