【摘要】 根据理论推导，当Ⅰ级反应采用相同的是试样量和相同的升温速率时，其微分型热分析曲线ＤＴＯ，ＤＴＡ和ＤＳＣ将有相同的峰顶温度Ｔｍ．本文用２台不同型号的热分析仪测定了典型的Ⅰ级反应──结晶草酸钙（ＣａＣ２Ｃ４·Ｈ２Ｏ）脱水反应的 ＤＴＧ，ＤＴＡ和 ＤＳＣ曲线峰顶温度 Ｔｍ，结果证实 Ｔｍ是相同的．测定中还发现，同一升温速率下，Ｔｍ与试样量的关系是线性的，即试验量越多，Ｔｍ越高．由此推论，通过３～４个不同升温速率下Ｔｍ求取活化能的Ｋｉｓｓｉｎｇｅｒ与Ｏｚａｗａ法，应当采用相同或尽量相近的试样量，以避免产生较大的误差．更多还原

【Abstract】 Theoretically, for the same first-order reaction, using the same sample mass and at the same heating rate, its differential thermal analysis curves, i.e.DTG, DTA and DSC should have the same peak temperatute Tm· This point is proved by a typical first-order reation, dehydration of crystal calcium oxalate(CaC2C4·H2O) in DTG, DTA and DSC curves in two different apparatus.The influence of sample mass on Tm is disscussed. The linear relationship of peak temperature vs sample mass is good, i.e. the greater sample mass, the higher peak temperature. So the Kissinger or Ozawa methods in DTA or DSC curves with 3~4 different heating rates must be used the identical or approximately Sample mass for avoid the marked error.更多还原