X-ray diffraction analysis for isothermal annealed powder Mg(OH)2

In this paper, we use an XRD-based 100% approach method to quantify the activity evolution of phase transformation from annealed powder Mg(OH)₂ to MgO. The sample is chemically synthesized. The isothermal phase transformation is carried out between 300 and 310 °C. The ratio of reacted magnesium hydroxide is applied and compared with different existing models. The Avrami model A_n appears to be the most close-fitting. An order of reaction between 1.5 and 2 is observed that it could be considered as a complex combination of different phenomenon, for which we test different models.