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

A new precursor containing a homogenous mixture of noncrystalline Al2O3 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. AlN powders with ultrafine particle sizes (～100nm) can beobtained at 1550℃ within 90min.