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用ＤＴＡ－ＴＧ联合法在惰性气氛下研究了软锰矿的热分解．结果表明，在２９８～１２６３Ｋ的温度范围，软锰矿的热分解过程共有６个吸热峰．当温度小于７２３１Ｋ时，主要是吸附水和结晶水的脱出；当温度大于８９８１Ｋ时，主要是ＭｎＯ２和ＣａＣＯ３的热分解，其中ＭｎＯ２的热分解是分步进行的：ＭｎＯ２→Ｍｎ２Ｏ３→Ｍｎ３Ｏ４．
The thermal decomposition of pyrolusite was studied using DTA-TG method in an inert atmosphere. The results show that in the range of 298 ~ 1263K, pyrolusite thermal decomposition process has a total of six endothermic peaks. When the temperature is less than 723 1K, the main is the adsorption of water and crystallization of water prolapse; when the temperature is greater than 898 1K, mainly thermal decomposition of MnO2 and CaCO3, which MnO2 thermal decomposition step by step: MnO2 → Mn2O3 → Mn3O4.