Coprecipitation-carbothermic reduction method for preparing aluminum nitride powder

Coprecipitation-carbothermic reduction method for preparing aluminum nitride powder

  • CN 101,973,533 B
  • Filed: 11/02/2010
  • Issued: 11/06/2013
  • Est. Priority Date: 11/02/2010
  • Status: Active Grant
First Claim
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1. a co-precipitation-carbothermic reduction prepares the method for aluminium nitride powder, it is characterized in that:

  • comprise the following steps;

    (1). raw material and proportioning;

    the aluminium source of employing is Tai-Ace S 150 ammonia;

    Carbon source is carbon black;

    Precipitation agent is ammonium hydrogencarbonate;

    Described aluminium source and carbon source are NH according to mol ratio 4A1 (SO 4) 224H 2O;

    C=1;

    (2 ~

         12) proportioning;

    Described precipitation agent and aluminium source are NH according to mol ratio 4HCO 3;

    NH 4A1 (SO 4) 224H 2O=(3 ~

         6);

    1 proportioning;

    (2). the preparation of precursor;

    at first be dissolved in respectively ammonium hydrogencarbonate, Tai-Ace S 150 ammonia and carbon black in deionized water, then Tai-Ace S 150 ammonia and carbon black are mixed to get mixing solutions, afterwards Tai-Ace S 150 ammonia and carbon black mixing solutions are joined in ammonium bicarbonate solution, stirring and evenly mixing, the aluminium source that makes and the precipitation of carbon black drain unnecessary moisture through filter cloth as far as possible, then insert in baking oven in the lower 80 ℃

    of oven dry of air atmosphere, obtain precursor;

    (3). the carbothermic reduction reaction of precursor;

    the precursor that described step (2) is obtained is carbothermic reduction 1 ~ 5h in the flowing nitrogen of 1200~

    1600 ℃

    or ammonia atmosphere, nitrogen or ammonia flow are 1~

    10L/min, reaction product obtains the nano level aluminium nitride powder through follow-up carbonization treatment.

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