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    贾春燕, 李东红, 刘永鹤. 以氢氧化铝为原料制备亚微米级α-Al2O3粉体[J]. 机械工程材料, 2015, 39(2): 42-44.
    引用本文: 贾春燕, 李东红, 刘永鹤. 以氢氧化铝为原料制备亚微米级α-Al2O3粉体[J]. 机械工程材料, 2015, 39(2): 42-44.
    shu
    JIA Chun-yan, LI Dong-hong, LIU Yong-he. Preparation of Sub-micron α-Al2O3 Powders Using Aluminium Hydroxide as Raw Material[J]. Materials and Mechanical Engineering, 2015, 39(2): 42-44.
    Citation: JIA Chun-yan, LI Dong-hong, LIU Yong-he. Preparation of Sub-micron α-Al2O3 Powders Using Aluminium Hydroxide as Raw Material[J]. Materials and Mechanical Engineering, 2015, 39(2): 42-44.
    shu

    以氢氧化铝为原料制备亚微米级α-Al2O3粉体

    Preparation of Sub-micron α-Al2O3 Powders Using Aluminium Hydroxide as Raw Material

      摘要
    • 摘要: 以氢氧化铝为原料,将其洗涤预处理后在1 200,1 230,1 250,1 350,1 430 ℃下煅烧,然后再球磨不同时间制得Al2O3粉体,研究了原料预处理、煅烧温度及球磨时间对煅烧后Al2O3产物中α相的转化率、比表面积及粒径的影响.结果表明:原料预处理可以明显降低原料中Na2O的含量,从而提高煅烧后Al2O3产物中α相的转化率,并降低产物中Na2O的含量;最佳的煅烧温度为1 250 ℃,该温度下制备的α-Al2O3具有较高的转化率和较好的活性,经球磨8 h后,其粒径可以达到亚微米级.

       

      Abstract: Aluminum hydroxides as raw material were calcined at 1 200,1 230,1 250,1 350,1 430 ℃ after pretreatment of washing.Sub-micron alumina were prepared after grinding for different periods of time.The effect of pretreatment of raw materials,calcination temperature and grinding time on the α-phase conversion rate,specific surface area and particle size of Al2O3.The results show that the pretreatment of raw material obviously reduced the content of Na2O in raw material,and then improved the conversion rate of α-phase and reduced the content Na2O in products.The optimum calcination temperature was 1 250 ℃,at which the α-Al2O3 of high conversion rate and good activity could be obtained,and particles were in sub-micron size after grinding for 8 h.

       

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