无硫黑火药的热分解动力学研究

Thermal Kinetics of Sulphur-free Black Powder

用差示扫描量热仪,在四种升温速率下,测定了KNO3/C=65/30,KNO3/C=75/15两种组分配比的无硫型黑火药的DSC曲线,并与普通黑火药的热分解数据与热行为进行了对比。在实验结果对比分析的基础上,运用Kissinger、Ozawa和atava-esták方程求解了黑火药发生热分解时的活化能和指前因子。结果表明:无硫黑火药与普通黑火药相比,起始分解温度降低,放热值降低,其中含碳量较低的黑火药,无硫黑火药活化能升高,机械感度也较低。

Thermal analysis curves of two proportions of sulphur-free black powders were measured by differential scanning calorimetry（DSC） at heating rates of 2,5,10,20 ℃·min-1.The data and thermal behaviors were contracted between sulphur-free black powder and ordinary black powder.On the base of experiment data,activation energy and pre-exponential factor of black powder were calculated according to Kissinger′s equation,Ozawa′s equation and atava-esták′s equation.Results indicate that the initial exothermic temperature,heat release and mechanical sensitivity of sulphur-free black powder are lower than these of ordinary one when active energy is higher.