Synthesis of ultrafine aluminum nitride powder by a low-temperature carbothermal reduction process

摘要

A new precursor that contains a homogenous mixture of noncrystalline Al{sub}2O{sub}3 and carbon is prepared with aluminum nitrate, glucose and urea as raw materials, by a low-temperature combustion synthesis process. The nitridation of this precursor shows that it has a very high reactivity, and nitridation reaction proceeds very rapidly in this precursor. AlN powder with ultrafine particle size (～100 nm) is obtained at 1550°C within 90min.