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Synthesis of Iron Nanoparticles by a New Laser-Induction Complex Heating Method and a Study of Its Thermal Phenomena

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Iron nanoparticles with fine size dispersion and average particle size of 28 nm 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 calculated maximum temperature in the crucible centre can reach 4000 K 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 °C to 520 °C with peak temperatures of 207.3 °C, 271.8 °C, and 372.0 °C, 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 °C to 750 °C in the TGA curve obtained by the standard process of Curie point measurement procedure.
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Keywords: IRON NANOPARTICLES; LASER-INDUCTION COMPLEX HEATING METHOD; THERMAL PHENOMENA

Document Type: Research Article

Publication date: September 1, 2012

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  • Journal of Computational and Theoretical Nanoscience is an international peer-reviewed journal with a wide-ranging coverage, consolidates research activities in all aspects of computational and theoretical nanoscience into a single reference source. This journal offers scientists and engineers peer-reviewed research papers in all aspects of computational and theoretical nanoscience and nanotechnology in chemistry, physics, materials science, engineering and biology to publish original full papers and timely state-of-the-art reviews and short communications encompassing the fundamental and applied research.
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