溶胶-凝胶工艺制备氮化铝陶瓷超细粉末  

Synthesis of ultrafine aluminum nitride powder by sol-gel process

作　　者：秦明礼[1] 曲选辉[1] 林健凉[1] 肖平安[1] 祝宝军[1] 

机构地区：[1]粉末冶金国家重点实验室,长沙410083

出　　处：《粉末冶金材料科学与工程》2002年第1期50-54,共5页Materials Science and Engineering of Powder Metallurgy

基　　金：国家杰出青年科学基金(50025412);国家重点基础研究发展规划(G2000067203)资助

摘　　要：采用硝酸盐-有机物低温燃烧反应溶胶-凝胶工艺,以硝酸铝(Al(NO_3)_3·9H_2O)、葡萄糖(C_6H_(12)O_6·H_2O)、尿素(CO(NH_2)_2)为原料,制备出粒度细小、混合均匀的铝源和碳源的混合前驱物,然后以该前驱物为原料进行碳热还原反应制备氮化铝粉末。研究表明,氮化铝的生成温度降低,在1350℃时即有大量氮化铝生成,1550℃时仅用90 min即可实现完全转化。SEM分析结果表明合成粉末为粒度分布均匀的纳米级(～100 nm)粉末。A new precursor which contains an homogenous mixture of noncrystalline AI_2O_3 and carbon was prepared with aluminum nitrate, glucose and urea as raw materials, by a low-temperature combustion process. The nitridation of this precursor shows that aluminum nitride forms at low temperature, high conver sion of aluminum nitride was got at I 350 ℃, and AIN powder with ultrafine particle size (～100 nm) was obtained at 1550 ℃ within 90 min.

关 键 词：燃烧反应 前驱物 碳热还原 氮化铝 

分 类 号：TQ174.785[化学工程—陶瓷工业]