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以硝酸铝和蔗糖为原料,采用溶胶-凝胶法制备碳铝干凝胶,通过碳热还原反应制备了高比表面积的AlN粉末,探讨了反应温度,硝酸镍的添加量对合成AlN粉末的影响。用XRD,SEM和低温N2物理吸附等手段表征发现,制备的AlN球形粒子粒径均一,约40~50nm左右,具有规则形貌,高比表面积和狭窄的孔径分布;镍盐的掺杂可以显著提升生成AlN的速率,使AlN球形粒子形貌发生很大的改变,其粒子变得粗大,甚至发生了部分团聚。
Aluminum nitrate and sucrose as raw materials, the sol - gel method to prepare carbon - aluminum xerogel prepared by carbothermal reduction reaction of high specific surface area AlN powder, discussed the reaction temperature, the amount of nickel nitrate added to the synthesis of AlN powder influences. Characterization by XRD, SEM and low temperature N2 physisorption showed that the prepared AlN spherical particles have a uniform particle size of about 40-50 nm with regular morphology, high specific surface area and narrow pore size distribution; the doping of nickel salts can be significant The rate of formation of AlN was increased, the morphology of AlN spherical particles changed greatly, and the particles became coarse and even partially agglomerated.