2019 Volume 62 Pages 30-38
Slurry processes are used for electrode in secondary batteries and fuel cells. It is well known to exhibit characteristic non-Newtonian rheological behavior such as pseudoplastic flow and dilatancy behavior as the concentration of the slurry increases for a major impact on the productivity, quality, and performance of material. Therefore, with the objective of identifying rheological control guidelines for concentrated slurries, the rheological behavior and micro structures of colloidal dispersions are being researched using monodispersed particles.
Concentrated dispersions of monodispersed silica particles exhibited dilatancy behavior with a highly viscous dispersion media. Although the critical shear rate at which dilatancy occurred decreased in accordance with increasing the solvent viscosity and particle size, the shear stress at which dilatancy occurred was defined regardless of the solvent viscosity and particle size. It can be explained by the diffusion-dominant model controlled by Pe (i.e., the ratio between diffusive and shear flows of particles).
