Green Synthesis of Aluminum Nitride Superfine Powder

In this paper, activated alumina was prepared from sodium carbonate and aluminum chloride by using precipitation method and as raw materials, reacted with ammonia at high temperatures to preparate aluminum nitride powders. The condition of aluminum nitride synthesis with lanthanum oxide doped in the activated alumina was compared. With the aid of powder phase analysis by X ray diffraction. The results showed that for lanthanum doped alumina pure aluminum nitride powders could form when the reaction temperature reached 1 200℃, while for undoped activated alumina, higher temperature was needed.