TY - JOUR AU - Tong, Zhangfa AB - Pure Al2O3–2SiO2 precursors (powders) for a geopolymer were prepared by a sol–gel method. The alkali-activated products derived from the precursors meet the general criteria for a geopolymer. The structure of the powders was investigated by NMR, XRD, and FTIR analysis, and their alkali-activation properties were studied. The data show that the powders when heat treated at 200 °C begin to contain 5-coordinated Al, those heat treated at 300 °C can begin to undergo alkali-activation, and those heat treated at 300–800 °C possess a number of structure characteristics similar to metakaolin, and the properties of their alkali-activated products are similar to those of the metakaolin geopolymers. TI - Preparation of geopolymer precursors by sol–gel method and their characterization JF - Journal of Materials Science DO - 10.1007/s10853-009-3549-x DA - 2009-05-26 UR - https://www.deepdyve.com/lp/springer-journals/preparation-of-geopolymer-precursors-by-sol-gel-method-and-their-CJUzMs4QEM SP - 3991 EP - 3996 VL - 44 IS - 15 DP - DeepDyve ER -