氢氧化镁纳米棒的等温分解动力学研究

以六水氯化镁和轻质氧化镁为原料，制备出碱式氯化镁纳米棒；再以碱式氯化镁纳米棒为前驱物，采用沉淀转化法，合成出直径约100—200nm，长约6～10μm的氢氧化镁纳米棒。利用热分析法对氢氧化镁纳米棒进行了等温热分解动力学研究，结果表明，氢氧化镁纳米棒在300℃和350℃时的热分解反应服从随机成核和随后生长机理、积分机理函数g（α）=-ln（1-α）]^1/m，表观活化能E=153kJ／mol，指前因子A=5．83×10^12s^-1。

Study on Kinetics of Isothermal Decomposition of Mg(OH)_2 Nano-rod

Basic magnesium chloride nano -rod are prepared with MgCl2 · 6H2O and light MgO as raw materials , and magnesium hydroxide nano - rod with diameters from 1 0 0 nm to 2 0 0 nm and an average 6 - 10 μm of lengths are synthesized with basic magnesium chlorides nano - rod as precursor by converting precipitation method. Kinetics of isothermal decomposition of magnesium hydroxide nano - rod is investigated by isothermal methods of kinetic analysis, and it is found that the reaction belongs to random nucleation and subsequent growth mechanism, the integral mechanism function is g （α） = -ln （1 - α） ] ^1/m ,the apparent activation energy E = 153 kJ/mol and the pre - exponential A =5.83 × 10^12s^-1