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Ceramics | Viscosity Measurement of Ceramic Slurries with RheolabQC

The Anton Paar RheolabQC makes rheological checks routine and easy. Applications in the ceramic industry are shown in this report. We demonstrate on the example of kaolin suspensions how rheological parameters like the yield point and viscosity help to describe important transport and processing behaviors of slurries.

The processing and transport characteristics of slurries are heavily dependent on their rheological properties. Knowledge of the rheological parameters is therefore essential, particularly when transporting a large amount of slurry.

This report describes a measuring method for the rheological assessment of slurries. The flow curve is used to represent the pipe flow, the flow resistance and pressure difference.

Experimental Setup

Kaolin: Aluminum silicate hydrate Al4 (OH)8 [Si4O10]

Kaolin (china clay) is a potassium silicate of the mineral kaolinite. It is created by the decomposition and transformation of silicate rocks. Pure kaolin is snow-white. When mixed with quartz or ice spar it is gray-yellow (crude kaolin, kaolin sand). Kaolin which has been created by the weathering of granite and ice spar can be found in many locations around the world.

It is mined using wet-chemical flotation and subsequent cleaning.

The main components of kaolin are SiO2 (35 %) and Al2O3 (46 % - 49 %). The pH value is approx. 5. The particle size is between 2 μm and 20 μm. The particle density is approx. 2.6 g/cm3

The sample investigated for this report was a kaolin suspension with a volume concentration of 10 % solids in water.

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