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HYDRATION KINETICS OF MAGNESIUM OXIDE, PART 3 - HYDRATIONRATE OF MgO IN TERMS OF TEMPERATURE AND TIME OF ITS FIRING

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The rate of hydration of magnesium oxide depends on thetemperature and time of its firing. To describe the kinetics of hydration overthe entire temperature range measured, use can be made of the equation ln(1/(1 -a) = (kt)n, which was proposed for similar heterogeneous systems byYerofeyev. The temperature dependence of rate constants conforms to theArrhenius equation. The activation energy also depends on temperature and thetime of firing of MgO, and its values range from 50 to 93 kJ mol-1.

 

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