镁铝水滑石热分解机理函数研究  

Study on Mechanism Function of Thermal Decomposition of MgAl-hydrotalcite

作　　者：谢鲜梅[1] 胡秋霞[1] 严凯[1] 席晶晶[1] 王志忠[1] 

机构地区：[1]太原理工大学化学化工学院,山西太原030024

出　　处：《太原理工大学学报》2008年第4期347-350,共4页Journal of Taiyuan University of Technology

基　　金：山西省自然科学基金资助项目(2008011018)

摘　　要：采用共沉淀法合成了镁铝摩尔配比为3的类水滑石,利用TG-DTG技术研究了在氮气氛围下镁铝类水滑石非等温热分解过程,并对其热分解机理函数进行了探讨。实验结果表明,镁铝水滑石热分解过程由两个阶段完成,且两阶段的热解机理函数均为化学反应机理函数,其积分式为G(α)=(1-α)-1-1。n（Mg）/n（Al） = 3 HTLc were synthesized by the method of coprecipitation. Mechanism function of thermal decomposition and non-isothermal kinetics of thermal decomposition process were researched by TG-DTG thermal analysis method in nitrogen atmosphere. It was discovered that the thermal decomposition proceeded in two stages when n（Mg）/n（Al）=3 and the thermal decomposition mechanism functions of the two stages of MgAl-HTLc are same , as following. G（a） = （1 - α）^-1- 1 .

关 键 词：水滑石 热分解 动力学 机理函数 

分 类 号：O611.14[理学—无机化学]