中文摘要：

以正硅酸乙酯（TEOS）和水合硝酸铝（ANN）为原料，采用溶胶-凝胶法合成了无定形Al2O3-2SiO2粉体。通过XRD与FT-IR对其无定形相结构进行了表征，发现其结构与偏高岭土相似。为了考察粉体的碱激发活性，用SiO2／Na2O摩尔比为1．2的硅酸钠溶液对其进行碱激发试验，结果表明合成的无定形Al2O3-2SiO2粉体具有碱激活性，3d抗压强度达到24MPa。

英文摘要：

Amorphous Al2O3-2SiO2 powders were synthesized by sol-gel method, with tetraethoxysilane （TEOS） and aluminum nitrate ninahydrate （ANN） as the starting material. The microstructure of the powders was investigated by XRD and FT-IR analysis. In order to examine the activity of the powder, alkali-activation tests were performed. The powders react with the sodium silicate solution with SiO2/Na2O mole ratio of 1.2. The results show that the synthetic powders have alkali-activation property, whose compressive strength reaches 24 MPa for 3 d, and its microstructure is similar to that of metakaolin.