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    杨琪, 刘磊, 沈彬, 邓意达, 胡文彬. 汞齐氧化法制备氧化铝纳米纤维[J]. 机械工程材料, 2008, 32(1): 10-12.
    引用本文: 杨琪, 刘磊, 沈彬, 邓意达, 胡文彬. 汞齐氧化法制备氧化铝纳米纤维[J]. 机械工程材料, 2008, 32(1): 10-12.
    shu
    YANG Qi, LIU Lei, SHEN Bin, DENG Yi-da, HU Wen-bin. Preparation of Alumina Nanofibers by Oxidation of Amalgam[J]. Materials and Mechanical Engineering, 2008, 32(1): 10-12.
    Citation: YANG Qi, LIU Lei, SHEN Bin, DENG Yi-da, HU Wen-bin. Preparation of Alumina Nanofibers by Oxidation of Amalgam[J]. Materials and Mechanical Engineering, 2008, 32(1): 10-12.
    shu

    汞齐氧化法制备氧化铝纳米纤维

    Preparation of Alumina Nanofibers by Oxidation of Amalgam

      摘要
    • 摘要: 以汞为反应介质,通过铝的氧化反应制备出直径为5~15 nm无定型结构的氧化铝纳米纤维,利用TEM、TG、DSC、XRD、比表面积分析等多种检测手段对产物的形貌和结构进行了研究,并讨论了煅烧过程中温度对产物形貌、物相结构、比表面积的影响.结果表明:无定型氧化铝纳米纤维向α-Al2O3相转变过程中,只出现γ-Al2O3中间相,而无其他中间过渡相出现;无定型氧化铝纳米纤维在850 ℃下煅烧2 h,转变为γ-Al2O3,仍保持纳米纤维的形貌;在1 200 ℃下煅烧2 h,转变为α-Al2O3,烧结成蛭石状.

       

      Abstract: Alumina nanofibers with amorphous structure,diameters from 5 to 15 nm,can be prepared by oxidation of aluminium in mercury medium.TEM,TG,DSC and XRD were used to analyze and characterize the sample.The influence of calcination temperature on the morphology,phase and specific surface area of the alumina nanofibers is discussed.The results indicate that during the transformation of the amorphous alumina nanofibers to α-Al2O3,only γ-Al2O3 transitional phase appeared.After calcinated at 850 ℃ for 2 h,the amorphous alumina nanofibers transfered to γ-Al2O3 and retain nanofiber’s morphology;after calcinated at 1 200 ℃ for 2 h,they transfer to α-Al2O3 and changed to vermiculite morphology.

       

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