Synthesis of iron nanoparticles by a new laser-induction complex heating method and a study of its thermal phenomena
Iron nanoparticles with fine size dispersion and average particle size of 28nm were prepared by a new laser-induction complex heating method. Based on the ANSYS software,the temperature distribution of iron with the heating time and the distance from the crucible centre was calculated.The calcualted maximum temperature in the crucible centre can reach 4000K and more higher than that of the boiling point of iron.The higher temperature,the bigger vaporization amount of iron,the higher output of iron nanoparticles. In addition,the oxidation behavior of the iron nanoparticles was also investigated. The results showed that when heating the nanoparticles in Ar ambient condition there were three overlapped exothermic reaction in temperature range from 170℃ to 520℃ with peak temperatures of 207.3℃, 271.8℃, and 372.0℃, respectively. The total exothermic enthalpy is as high as 4.764 kJ/g. There is an anomaly weight increment in the temperature range from 600℃ to 750℃ in the TGA curve obtained by the standard process of Curie point measurement procedure.
Kai-jin Huang Chao-dong Tan Mu-lin Hu Chang-sheng Xie
State Key Laboratory of Materials Processing and Die & Mould Technology, Huazhong University of Science and Technology, Wuhan 430074, P.R.China
国际会议
桂林
英文
1-6
2010-11-16（万方平台首次上网日期，不代表论文的发表时间）