高温固相反应工艺制备AlON粉体  

Preparation of Aluminum Oxynitride Powders by Solid-State Reaction

作　　者：刘学建[1] 李会利[2] 黄政仁[1] 王士维[1] 江东亮[1] 

机构地区：[1]中国科学院上海硅酸盐研究所,上海200050 [2]华东师范大学纳光电集成与先进装备教育部工程研究中心,上海200062

出　　处：《无机材料学报》2009年第6期1159-1162,共4页Journal of Inorganic Materials

基　　金：国家自然科学基金(50672113;50802106)

摘　　要：以Al2O3和AlN为原料,在氮气气氛下通过高温固相反应工艺合成氮氧化铝(AlON)粉体,借助XRD分析系统研究了反应温度、保温时间及原料配比等工艺参数对反应产物相组成的影响并探讨了反应机理.研究结果表明:该反应主要受热力学控制,动力学因素也具有重要作用,反应温度和保温时间对AlON粉体的合成均具有重要影响.在相对较低的反应温度下,通过AlN固溶进入Al2O3晶格形成富氧(O-rich)的AlON相;在相对较高的反应温度下,产物中少量残余的AlN通过进一步扩散固溶进入O-rich-AlON晶格形成富氮(N-rich)的AlON相(N-rich-AlON);在1950℃时,合成单相的AlON粉体.Aluminum oxynitride（AlON） powders were prepared by solid-state reaction processing with α-Al2O3 and AlN as starting materials in nitrogen atmosphere.The effects of reactive temperature,holding time,and Al2O3/AlN ratio on the resultant phase compositions were investigated systematically by XRD.In addition,the reactive mechanism was tentatively explored.The experimental results indicate that the solid-state reaction for AlON is mostly controlled by thermodynamics and the dynamic factors are also important to the reaction.The reaction can not be thoroughly processed neither only by prolonging holding time at lower reactive temperature nor only by increasing reactive temperature in a shorter holding time.Both reactive temperature and holding time are crucial to the reactive progress.By diffusing AlN into Al2O3 lattice,O-riched AlON formations begin between 1600℃ and 1650℃,and finish at about 1750℃.Above 1800℃,O-riched AlON converts into N-riched AlON by further diffusing remnant AlN into Al2O3 lattice.Pure AlON is prepared by the solid-state reaction of Al2O3 and AlN at 1950℃ in nitrogen atmosphere for 4h.

关 键 词：氮氧化铝(AlON) 粉体 固相反应 反应动力学 反应机理 

分 类 号：TQ174[化学工程—陶瓷工业]