纳米铝粉的非等温氮化动力学  

Non-Isothermal Kinetics Analysis of the Nitridation of Aluminum Nanoparticles

作　　者：张丁成 罗江山[2] 唐昶环[2] 李恺[2] 易勇[1] 

机构地区：[1]西南科技大学极端条件物质特性实验室,四川绵阳621010 [2]中国工程物理研究院激光聚变研究中心,四川绵阳621900

出　　处：《西南科技大学学报》2016年第3期10-15,共6页Journal of Southwest University of Science and Technology

摘　　要：在不同升温速率条件下,利用同步差示扫描量热法(DSC)/热重法(TG)来研究纳米铝粉的非等温氮化动力学,通过5种积分法和一种微分法对数据进行处理,获得了纳米铝粉非等温氮化的最可机理函数。结果表明,氮化反应的表观活化能和指前因子分别为111.74 k J·mol^(-1)和103.46 s^(-1)。反应机理服从n=3/2的幂函数法则,其动力学方程为dα/dt=10^(3.28)·α^(-1/2)·e^(-13439.9/T)。Non - isothermal kinetic analysis of the nitridation of aluminum nanoparticles obtained by the flow -levitation method was conducted by simultaneous differential scanning calorimetry and thermogravimetry at different heating rates. The most probable kinetic parameters were obtained using five integral methods and one differential method. The apparent activation energy and pre - exponential factor of the nitriding reaction were 111.74 J·mol^-1 and 103. 46 s 1, respectively. The reaction obeys the Mampel power law with n - 3/2, and the kinetics can be expressed by the following equation ; dα/dt=103.28·α^-1/2·e^-13439.9/T.

关 键 词：纳米铝粉 表面氮化 非等温分析 自悬浮定向流法 

分 类 号：TB383.1[一般工业技术—材料科学与工程] O641.4[理学—物理化学]