Abstract
Mixtures of calcium carbonate and silica in a 2:1 molar ratio containing varying amounts of MgO, SrCO 3 and BaCO 3 as dopants were separately subjected to thermal analysis. The decomposition behaviour of these systems is reported here on the basis of TG, DTG and DTA investigations. Activation energies ( E a) and enthalpies (Δ H) for the decomposition reactions have been calculated and the variations in these parameters have been discussed. It was observed that the application of a first-order kinetic equation provides an adequate quantitative description of the DTA curves and E a values, calculated from the thermal data.
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