低温碳热还原法合成氮化铝陶瓷超细粉末

Synthesis of Ultrafine Aluminium Nitride Powder by a Low-temperature Carbothermal Reduction Process

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（NO3）3·9H2O）、葡萄糖（C6H12O6·H2O）、尿素（CO（NH2）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,该前驱物具有较高的反应活性,氮化反应速率快,1550℃时仅用90min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（～100nm）粉末.

A new precursor containing a homogenous mixture of noncrystalline Al(2)O(3) and carbon was prepared with aluminium. nitrate, glucose and urea as raw materials, by a low-temperature combustion process. The nitridation of this precursor shows that it has a high reactivity and nitridation reaction proceeds rapidly. AIN powders with ultrafine particle sizes (similar to100nm) can be obtained at 1550degreesC within 90min.