By means of DTA, SEM and XRD, the range of temperature for the stability of crystal and the variation of structure due to dehydration of ettringite is studied.

• 通过DTA，SEM观察和大量X射线衍射分析，给出了钙矾石稳定存在和结构脱水变异的温度范围以及变异后的结构特征；