INVESTIGATION OF THE MICROSTRUCTURE OF MECHANICALLY ACTIVATED TALC PLUS AL(OH)(3) SYSTEM

The mechanically activated and non-activated talc + Al(OH)(3) model sy stems behave differently after thermal treatment because the arisen mi crostructural changes significantly affect thermal reactions. Phase co mpositions of the investigated model systems, fired at several selecte d temperatures, show large differences. Alterations in the microstruct ure are demonstrated using water vapour adsorption, conductometry, imb ibometry and measurement of heat of dissolution. Mechanical activation was performed in a corundum-lined planetary mill, the qualitative pha se analyses by the help of XRD, and the thermoanalytical investigation s by derivatography.