(華中理工大學(xué) 材料學(xué)院， 武漢 43007)
摘 要: 采用激光感應(yīng)復(fù)合加熱法，在真空條件下蒸發(fā)純Zn原料制得納米Zn粉， 顆粒平均直徑為40 nm。 通過在空氣中不同溫度下對(duì)納米Zn粉進(jìn)行熱處理， 利用X射線衍射、 透射電鏡考察了熱處理前后納米Zn粉的相結(jié)構(gòu)和形態(tài)變化。 最后分別在Ar氣和 O2氣條件下， 對(duì)納米Zn粉進(jìn)行差熱分析， 進(jìn)一步研究了該納米Zn粉的抗氧化性能。 結(jié)果發(fā)現(xiàn)： 經(jīng)過表面鈍化處理的納米Z于熔點(diǎn)的溫度不易完n粉在低全氧化，具有較好的抗氧化性能。
關(guān)鍵字: 納米Zn粉； 熱處理； 差熱分析；抗氧化性能； 鈍化處理
（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
