摘要
本研究采用溶胶一凝胶法合成了成分可控、高纯和高活性的Al2O3-SiO2粉体。以工业级水玻璃为碱激发剂，将二者按照方沸石理论配比（Na：Al：Si=1：1：2）混合后制备得到Na2O-Al2O3-4SiO2-8H2O地质聚合物凝胶体；将地质聚合物凝胶体在70℃烘箱中养护一定时间后脱模；研究采用x射线衍射（XRD）、扫描电镜（SEM）和BET等对产物进行了表征，无模板剂的条件下利用240℃水热反应制备了50～1200μm不同粒径的方沸石晶体，并初步探讨了大尺寸方沸石晶体的形成机理。
The ingredient controllable, high-purity, high reactive Al2O3-SiO2 powders were synthesized by sol-gels. Using the industrial grade sodium silicate Na2SiO3·mH2O as alkali activator, the Na2O-Al2O3- 4SIO2-8H2O geopolymer gels were prepared from the Al2O3-SiO2 powders and sodium silicate according to the analcime zeolite composition（Na： AI： Si = 1： 1：2）. Then the reaction products were cured in the oven 70℃ to form the geopolymer gels. The controllable 50-1200μm different particle size of analcime crystals through hydrothermal method at 240℃, especially without organic structure-directing agents （SDAs） were synthesized. The products were analyzed by X-ray diffraction, SEM and BET. The formation mechanism of large analcime crystals was also discussed.
出处
《人工晶体学报》
EI
CAS
CSCD
北大核心
2013年第11期2390-2395,共6页
Journal of Synthetic Crystals
基金
国家自然科学基金(51262002,50962002)
广西自然科学基金重点项目(2012GXNSFDA053003)
关键词
地聚物
凝胶转换法
方沸石
geoploymer
geopolymer-gel-conversation method
analcime
