Add time:08/19/2019         Source:sciencedirect.com

The structures of kaolinite, calcite and corundum were strongly deteriorated with activating the mixture with high energy planetary mono mill. Anorthite formation kinetics of activated and non-activated mixtures were studied by Differential Thermal Analysis under a heating rate of 5–30 °C, using Kissenger plots. The crystallization of anorthite showed an activation energy of 325 kJ mol−1 for mechanically activated and of 475 kJ mol−1 for non-activated samples. Both specimens crystallized by bulk nucleation. The phase formations were investigated upon heating at 1000–1100–1200–1300 °C. The structure of anorthite, for activated samples, was almost restored after firing at a temperature as low as 1100 °C for which the non-activated samples had to be fired at 1200 °C.

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