Abstract:

Research on the expanding test of aluminum nitride powder prepared by carbothermal reduction was made.Effects of different aluminum sources,carbon sources,nitriding temperature,holding time and additives on the synthesis ofaluminum nitride powder were investigated.The prepared AlN powder was analyzed by means of XRD,SEM and chemical physical analysis.Results showed that the use of sand-treated aluminum source B (α-Al₂O₃) and 3^# carbon sources (acetylene black) as raw materials contributed to the carbothermal reduction reaction;the use of additive C reduced the reaction activation energy and increase nitriding rate;and the granulation process helped to the carbothermal reduction reaction in expanding test.

Key words: carbothermal reduction, AlN powder, expanding test