采用XRD和SEM等测试手段对用铝厂废渣和高岭土合成的莫来石材料进行微观结构表征.探讨不同配方合成的莫来石的晶相组成、晶胞参数及带有结构缺陷的莫来石固溶体的形成机理.结果表明各试样最多形成三个晶相:莫来石固溶体Al4.54Si1.46O73、Al2O3和SiO2,其中Al4.54Si1.46O9.73为主晶相,其晶胞参数a,b,c随Al2O3含量的增加而增加,但仍保持Pbam空间群.当原料中W(Al2O3)/W(SiO2)=2.42时,试样中的莫来石含量达到最高,为94.2%.
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