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The Detection of Structural Transformations in Kaolin Suspensions by Ultrasound

✍ Scribed by James C Austin; Richard E Challis

Publisher
Elsevier Science
Year
1999
Tongue
English
Weight
101 KB
Volume
220
Category
Article
ISSN
0021-9797

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✦ Synopsis

The fractal dimension of kaolin flocs suspended in water was increased by the addition of potassium chloride and indirectly monitored by low-power ultrasonic pulses in a test cell with a "pitch-catch" configuration. The results from these measurements were compared with fractal dimensions obtained from quasi-elastic light-scattering measurements in a kaolin suspension of a much lower solid volume fraction. Further comparison with a coupled phase theory of ultrasound propagation, utilizing measured slope viscosity and particle size distribution, revealed that the observed changes in the ultrasound signature were commensurate with changes in the fractal dimension observed by light scattering over a potassium chloride concentration range of approximately 0 -1 mM.

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