利用X射线衍射、扫描电镜等手段 ,对SiO2 CaO H2 O反应保温过程中产物的各种形态进行了研究。认为 :硬硅钙石针状晶体是平衡反应的最终产物 ,在适当的温度、压力下 ,经过一定的反应时间就能生成。而中空二次粒子球的形成则是一个动力学控制过程 ,在整个成球反应过程中 ,石英粉的溶解速度是关键。 Using X-ray diffraction, scanning electron microscopy and other means, the various forms of SiO2 CaO H2 O reaction during the heat preservation process were studied. It is considered that the xonotlite acicular crystal is the final product of the equilibrium reaction and can be formed after a certain reaction time at a proper temperature and pressure. The formation of hollow secondary particle sphere is a kinetic control process, the entire ball reaction process, the dissolution rate of quartz powder is the key.