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以高岭土为主要原料合成4A沸石和不同晶化时间的样品,用XRD、SEM、红外对合成的产品进行晶化过程分析,并测试了各样品的NH4+交换能力.发现NH4+交换容量随着晶化时间的增长而变大,并且无定形的沸石前驱体有一定的离子交换能力.另外,对不同煅烧时间的高岭土为主要原料合成的地质聚合物做NH4+交换试验和抗压强度试验,结果表明:地质聚合物具有和沸石前驱体相近的离子交换能力,从而确定地聚合物具有类沸石前驱体的三维网络结构,并且地质聚合物的合成条件不同,其离子交换的数值不同,其数值大小与抗压强度的数值具有一一对应性,从而表明可以用离子交换的方法来初步评价地质聚合物的性能.
4A zeolite and samples with different crystallization time were synthesized by using kaolin as main raw material. The crystallization process of the synthesized product was analyzed by XRD, SEM and IR, and the NH4 + exchangeability of each sample was tested. It was found that the exchange capacity of NH4 + And the amorphous zeolite precursor has certain ion exchange ability.In addition, NH4 + exchange test and compressive strength test of geopolymer synthesized from kaolin with different calcining time are carried out. The results show that: Geopolymer has the same ion exchange capacity as the zeolite precursor, so it can be confirmed that the polymer has the three-dimensional network structure of the zeolite precursor, and the synthesis conditions of the geopolymer are different. The values of the ion exchange are different. The values of the compressive strength have a one-to-one correspondence, indicating that the performance of the geopolymer can be initially evaluated by means of ion exchange.