(华中理工大学 材料学院， 武汉 43007)
摘 要: 采用激光感应复合加热法，在真空条件下蒸发纯Zn原料制得纳米Zn粉， 颗粒平均直径为40 nm。 通过在空气中不同温度下对纳米Zn粉进行热处理， 利用X射线衍射、 透射电镜考察了热处理前后纳米Zn粉的相结构和形态变化。 最后分别在Ar气和 O2气条件下， 对纳米Zn粉进行差热分析， 进一步研究了该纳米Zn粉的抗氧化性能。 结果发现： 经过表面钝化处理的纳米Z于熔点的温度不易完n粉在低全氧化，具有较好的抗氧化性能。
关键字: 纳米Zn粉； 热处理； 差热分析；抗氧化性能； 钝化处理
（College of Materials Science and Engineering,Huazhong University of Science and Technology, Wuhan 430074, P.R.China）
Abstract:Zinc nanopowder was produced by evaporating pure zinc raw material in the vacuum condition using Laserinductive multiple heating method. The averagediameter of Zn nanoparticles produced is about 40nm. The powder was heat treated at different temperatures in air and the influence of heat treatment on the crystal structure and morphology was examined by Xray diffraction and transmission electron microscopy. Differential scanning calorimetry was also used inAr and O2 respectively to make a further explanation for the oxidization resistance of the Zn nanopowder. It was found that the appropriate surface passivation treatment could effectively suppress Zn nanopowder from being further oxidized below the melting point. Therefore the Zn nanoparticles showed relatively good oxidization resistance in the experiment.
Key words: zinc nanopowder； heat treatment； differential scanning calorimetry； oxidization resistance； passivation treatment
