不可以
因为AlCL3会发生水解
AlCL3 + 3H2O = Al（OH）3 + 3HCl
加热溶液就会HCl 挥发出来
剩下的Al（OH）3加热蒸干发生分解反应
2Al（OH）3 = Al2O3 + 3H2O
得到的是 Al2O3
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