Abstract
In this report are investigated the rheological characteristics of pastes using an extruder and coaxial cylindrical viscometer. Three kinds of the test samples of paste were prepared from titanium dioxide (TiO2), carbon black and calcium carbonate (CaCO3) VS. di-octyl-phthalate (DOP).
The transitions from pseudoplastic to Newtonian and finally dilatancy were observed in the flow behaviors, as the mixture ratio of solid and liquid increases. However, the flow of TiO2-DOP paste changed with the shear rate, and finally became Bingham flow. The viscosity of paste varied in the range of 103 and 105 poise depending on the measuring method. The both of shear and plug flow were observed in the sxperiments.
These experimental facts suggest the behavior of the solid-liquid mixture can not explained without the flow effects of particulate meterials.
