Abstract
The influence of temperature on the sedimentation volume and relative yield values of suspensions of spherical glass beads in toluene containing varying percentages of water has been measured. The increased sedimentation volume and yield value, due to the presence of water, found at room temperature virtually disappeared below approximately 0 °C. This is in agreement with the theory which ascribes the effect of water to its interfacial tension against toluene. At temperatures above 0 °C. there was a gradual fall in the sedimentation volume and yield value from the maximum found at 0 °C. This is attributed to the increasing solubility of water in toluene. Suspensions containing no water or only a small quantity showed an unexpected steady increase in sedimentation volume and yield value as the temperature was lowered to −60 °C. This effect was also observed with a suspension of glass beads in pentane. The results indicate a close connection between yield value and equilibrium sedimentation volume.
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