石英微粉表面结构对硬硅钙石中空二次粒子形貌的影响

利用TEM、SED和EDS方法，检测石英微粉表面非晶态层的厚度，估算出非晶态二氧化硅所占的体积和质量百分含量，并着重研究石英微粉表面非结晶层对水热反应合成硬硅钙石中空二次粒子球形貌的影响．通过XRD和XEM方法鉴别反应料浆的晶相组成和形貌．结果表明：石英微粉表面存在少量非晶态二氧化硅时，未影响硬硅钙石中空二次粒子球的合成；而非晶态二氧化硅的含量较高时，会阻碍硬硅钙石中空二次粒子球的合成，最终形成硬硅钙石晶体和托贝莫来石晶体的堆积体．

Effect of Surface Morphology of fine Quartz on the Hollow Secondary Particles of Xonotlite

The thickness of amorphous silicon dioxide on the surface of fine quartz was detected by TEM, SED and EDS methods and its volume and weight content computed. Moreover, its effect on the hollow secondary particles of xonotlite produced by hydrothermal reactions was studied.'Reaction products were investigated by XRD and SEM methods. The experiment results show low content of amorphous silicon dioxide in the surface has no effect on the formation of the hollow secondary particles of xonotlite, but high content delays their formation and leads to produce aggregates of xonotlite and tobermorite crystals.