Fe/S混合粉体的机械化学反应  

Mechanochemical reaction process of Fe/S mixed powder

作　　者：欧阳全胜[1] 

机构地区：[1]中南大学冶金科学与工程学院,长沙410083

出　　处：《粉末冶金材料科学与工程》2010年第4期344-349,共6页Materials Science and Engineering of Powder Metallurgy

基　　金：国家自然科学基金重点资助项目(50434010)

摘　　要：采用振动磨样机进行FeS2的机械化学合成,利用X射线衍射和扫描电镜技术研究FeS2的机械化学反应过程。结果表明:整个反应过程没有检测到FeS,反应产物为FeS2;Fe/S体系的机械化学反应有中间相非晶产物FeS2生成,从非晶FeS2到结晶产物FeS2结构的形成并没有随化学转变的结束而完成,而是发生了一定的滞后;Fe/S体系的机械化学反应属于非平衡机制;提高研磨转速,只能缩短机械化学反应的发生时间,而不会改变整个机械化学反应趋势。Ring-roller mill was employed for mechanochemical synthesis of FeS2,and the mechanochemical reaction of Fe/S mixed powder was studied by X-ray diffraction and SEM techniques.The results show that no FeS is detected during the whole milling process,and the final reaction product is FeS2.The intermediate amorphous FeS2 appears during the mechanochemical reaction of Fe/S process and the structure formation from amorphous FeS2 to crystallized one does not keep in step with,but lags behind the chemical transformation.The mechanochemical reaction of Fe/S belongs to a non-equilibrium mechanism.Increasing the milling speed can shorten the incubation time of the mechanochemical reaction,but can not influence the reaction itself.

关 键 词：振动磨样机 机械化学反应 反应历程 非平衡机制 FeS2 

分 类 号：TB303[一般工业技术—材料科学与工程] TQ03[化学工程]