中文摘要：

采用DTA、TG和XRD等检测手段研究了二钼酸铵的热分解行为，结果表明：二钼酸铵的热分解经历了两个阶段，所对应的反应温度分别在180℃左右及300℃左右，二钼酸铵热分解反应第一步为：4（NH4）2MO2O7→180℃ （NH4）4MO8O26＋4NH3↑＋2H2O↑；第二步为（NH4）4MO8O26→300℃ 8MoO3＋4NH3↑＋2H2O↑。

英文摘要：

Thermal decomposition of ammonium dimolybdate has been investigated by means of DTA, TG and XRD. It is shown that the thermal decomposition of ammonium dimolybdate has two steps, the reaction temperature is about 180℃ and 300℃. The first step of ammonium dimolybdate in the thermal decomposition reaction is：4（NH4）2MO2O7→180℃ （NH4）4MO8O26＋4NH3↑＋2H2O↑.And the second step is ：（NH4）4MO8O26→300℃ 8MoO3＋4NH3↑＋2H2O↑.