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采用 TG- DTG方法 ,得到 L a Cl3 · n H2 O晶体在空气中热分解过程及相应分解反应的活化能 ,即在84～ 112℃时 ,L a Cl3 · 7H2 O失去 4个结晶水 ,分解反应的活化能为 133.2 k J/ mol,在 12 3.2～ 137.9℃时 ,L a Cl3 ·3H2 O失去 2个结晶水 ,分解反应的活化能为 15 3.9k J/ mol,在 16 2 .5～ 177.4℃时 ,L a Cl3 · H2 O失去 1个结晶水 ,分解反应的活化能为 45 4.6 k J/ m ol,在 397.7～ 46 4.5℃时 ,L a Cl3 气相水解为 L a OCl,活化能为 6 6 k J/ m ol。在温度低于90 0℃ (最高测试温度 )时 ,L a OCl能稳定存在。
The TG-DTG method was used to obtain the activation energy of thermal decomposition of L a Cl3 · n H2 O crystals in air and the corresponding decomposition reaction, that is, L a Cl3 · 7H2O lost 4 crystal water at 84 ~ 112 ℃, decomposed The activation energy of the reaction is 133.2 kJ / mol. At 12 3.2 ~ 137.9 ℃, L a Cl3 · 3H 2 O loses two crystal water, the activation energy of the decomposition reaction is 15 3.9 k J / mol, At 177.4 ℃, L a Cl 3 · H 2 O lost one crystal water and the activation energy of the decomposition reaction was 45 4.6 k J / m ol. At 397.7 ~ 46 4.5 ℃, L a Cl 3 was hydrolyzed to L a OCl gas by vapor phase activation Is 6 6 k J / m ol. L a OCl is stable at temperatures below 90 0 ° C (maximum test temperature).