中文摘要：

基本的镁碳酸盐的热分解过程被调查。第一，基本的镁碳酸盐从菱镁矿被准备，并且产品的特征被 X 光检查衍射(XRD ) 和扫描电子显微镜学(SEM ) 检测。随后，在空中的基本的镁碳酸盐的热分解过程被 thermogravimetry 微分的 thermogravimetry (TG-DTG ) 学习。XRD 的结果证实基本的镁碳酸盐的化学作文是 4MgCO3 杮??????????????? 灧吗？？

英文摘要：

The thermal decomposition process of basic magnesium carbonate was investigated. Firstly, Basic magnesium carbonate was prepared from magnesite, and the characteristics of the product were detected by X-ray diffraction （XRD） and scanning electron microscopy （SEM）. Subsequently, the thermal decomposition process of basic magnesium carbonate in air was studied by thermogravimetry-differential thermogravimetry （TG-DTG）. The results of XRD confirm that the chemical composition of basic magnesium carbonate is 4MgCO3·Mg（OH）2·4H2O. And the SEM images show that the sample is in sheet structure, with a diameter of 0.1-1 μm. The TG-DTG results demonstrate that there are two steps in the thermal decomposition process of basic magnesium carbonate. The apparent activation energies （E） were calculated by Flyrm-Wall-Ozawa method. It is obtained from Coats-Redfem＇s equation and Malek method that the mechanism functions of the two decomposition stages are D3 and A1.5, respectively. And then, the kinetic equations of the two steps were deduced as well.