English

应用科学学报 ›› 1990, Vol. 8 ›› Issue (3): 257-263.

• 论文 • 上一篇    下一篇

硅酸钙水合晶体的结构特征及其形成机理

段雪1, 王作新1, 姚祥2   

  1. 1. 北京化工学院;
    2. 紫荆关金属结构厂
  • 收稿日期:1988-10-24 修回日期:1989-06-06 出版日期:1990-09-30 发布日期:1990-09-30

STRUCTURE CHARACTERISTICS AND FORMATION MECHANISMS OF CRYSTALS OF HYDRATED SILICATES

DUAN XUE1, WANG ZUOXIN1, YAO XIANG2   

  1. 1. Beijing Chemical Engineering Institute;
    2. Zijingguan Metallic Structures Factory
  • Received:1988-10-24 Revised:1989-06-06 Online:1990-09-30 Published:1990-09-30

PDF

195

被引次数

9

摘要： 采用扫描电镜、X射线衍射、红外光谱及热分析对溶解乙炔气瓶多孔填料在蒸压条件下生成的硅酸钙水合晶体进行了有关结构特征的研究,并结合实验结果讨论了硅酸钙水含晶体的形成机理.结果表明:在蒸压条件下,无定形SiO2及结晶态SiO2与Ca(OH)2反应的主要产物分别为硬硅钙石及托勃莫莱石,反应分别经历了水化结晶机理及晶内扩散机理,当无定形SiO2和结晶态SiO2共存时,前者与Ca(OH)2反应的速率较高,且产物也以硬硅钙石为主.

Abstract: The crystals of hydrated silicates which were formed with pressure-steam were studied by using the scanning electron microscope, X-ray diffractometer, Fourier transformation infrared spectrometer and thermoanalyzer. According to the measurements, their structure characteristics were investigated, and the mechanisms for the formation were discussed in detail.
It was found from experiments that under the pressure-steam condition, the amorphous quartz and the crystalline quartz reacting with Ca(OH)2 would mainly come to be Xonotlite and Tobermorite respectively. These reactions were able to explain the mechanism of hydrated crystals and the diffusing mechanism through the lattice, respectively. If he amorphous quartz and crystalline quartz existed together, the former reacted with Ca(OH)2 at a higher rate than the latter, and the product was mainly Xonotlite.