氮气气氛高能球磨Al_2O_3相变研究  

Study on Phase Transformation of Al_2O_3 during High Energy Ball Milling in Nitrogen Atmosphere

作　　者：李鹏亮[1] 席生岐[1] 周敬恩[1] 

机构地区：[1]西安交通大学金属材料强度国家重点实验室,陕西西安710049

出　　处：《稀有金属材料与工程》2006年第10期1669-1672,共4页Rare Metal Materials and Engineering

基　　金：高等学校博士点基金项目(20040698053);教育部科学技术研究重点项目(105159)

摘　　要：研究了高能球磨过程中Al2O3相结构的变化。结果表明:随着球磨时间的延长,粉末中发生了γ-Al2O3→α-Al2O3的转变,这一点对于降低碳热还原反应激活能是不利的;高能球磨20h,Al2O3部分非晶化,而且有立方结构AlN生成;高能球磨过程中形成的AlN,结构不同于常规六方结构氮化铝;增加球磨能量,立方AlN生成量增加;650r/min高能球磨40h,AlN生成量达到72%。The crystal structure conversion of Al2O3 during high-energy ball milling was investigated in this paper. γ-Al2O3, which with high reaction activation transformed to α-AI2O3 along with ball milling. After 20 hours milling, a part of Al2O3 became amorphous and AIN was observed in powder. The crystal structure of AIN gained during ball milling was cubic, differed from regular hexagonal AIN synthesized by carbothermal reduction.

关 键 词：氧化铝 氮化铝 晶体结构 高能球磨 

分 类 号：TQ174.1[化学工程—陶瓷工业]