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 40nm。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Zn粉在低于熔点的温度不易完全氧化 ,具有较好的抗氧化性能。
Zinc nanopowder was produced by evaporating pure zinc raw material in the vacuum condition using Laser inductive multiple heating method. The average diameter 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 X ray diffraction and transmission electron microscopy. Differential scanning calorimetry was also used in Ar and O 2 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.
出处
《中国有色金属学报》
EI
CAS
CSCD
北大核心
2000年第4期502-505,共4页
The Chinese Journal of Nonferrous Metals
关键词
纳米Zn粉
热处理
差热分析
抗氧化性能
zinc nanopowder
heat treatment
differential scanning calorimetry
oxidization resistance
passivation treatment
