机械力活化固相化学反应法制备纳米粉体的机理研究  

Mechanism of Mechanically Activated Solid State Chemical Reaction

作　　者：吴昭俏[1] 郑育英[1] 黄慧民[1] 姬文晋[1] 

机构地区：[1]广东工业大学轻工化工学院,广州广东510006

出　　处：《中国粉体技术》2007年第3期26-31,35,共7页China Powder Science and Technology

基　　金：广东省自然科学基金团队项目;编号:04205301;广东省重大工业攻关项目;编号:2004A10701005

摘　　要：介绍了固相化学反应机理及其影响因素,在固相化学反应的基础上提出了机械力活化固相化学反应法的概念,阐述了机械力对固相化学反应的活化影响,对机械力化学的作用过程、机械力对固相化学反应的作用机理和机械力作用下的扩散特点分别进行了研究。提出了机械力活化固相化学反应的机制:颗粒尺寸减小、晶粒细化和缺陷增加、局部升温等,为反应提供了大的反应面积,同时提高了固相反应的扩散系数,降低了反应活化能。The mechanism of solid state chemistry reaction and its influencing factors were introduced, and the concept of mechanically activated solid state chemical reaction was put forward. The effect of mechanical power on solid state chemical reaction was discussed. The active process of mechano-chemistry, active mechanism of mechanically activated solid state chemical reaction and solid-state diffusion were studied respectively. The mechanisms of mechanically activated solid state chemical reaction, such as refinement of particles, grain refining and defect increasing, localized heating-up, etc were suggested. They made the reaction has bigger reacton area, increased the diffusion coefficient, decreased activation energy of solid reaction.

关 键 词：机械力化学 固相化学反应 扩散 纳米粉体 

分 类 号：TQ174[化学工程—陶瓷工业]