Dehydroxylation and Dehydration as Parameters For Characterisation of Clays - Part II: Kaolinites, Pyrophyllite and Talc

A sophisticated technique of modified TG, DTG has been described which can detect clay species of kandite, pyrophyllite and talc groups by employing a simple home-made TG Instrument. Many new parameters like half weight loss, differential phase lag and half weight loss temperature are obtained along with other thermal parameters and their rationale are discussed in relation to species level characterisation. The parameteral derivation and its relationship to surface morphology of clays has been described. This highly sensitive method has special application in developing countries and could be adopted in clay based industries for material quality control.