Viscosity measurement of kaolinite using the Brookfield Viscometer

The Brookfield viscometer is an instrument for the measurement of low-shear viscosity; it is reputed to be quick and easy to use and to give very repeatable results. ViscositY measurements of kaolinite slurries are essential to their evaluation as possible raw materials for paper making and to their use in ceramic bodies formed by casting processes. The work recorded in this report was carried out primarily to establish a procedure for measurement of viscosity in the BGS laboratories, and secondly to make a preliminary assessment of the effect of kaolin particle size and shape on the highsolids- content suspensions required for viscosity measurement and eventual use. Much of this work was carried out with Mr A. Dawson, Leicester University, during a secondment in the summer of 1991. The work forms part of the ODAlBGS project "Minerals for Development".