Master of Science in Mechanical Engineering (MSME)
Nanosized chain-like aggregates were developed in an iron pentacarbonyl-carbon monoxide (Fe(CO) 5 ¨C CO) air diffusion flame system. Magnetic field was applied around the diffusion flame using an electromagnet with an intensity of 0.4 Tesla. Transmission Electron Microscopy (TEM) analysis was performed to observe the behavior of the chains formed and to study the effect of magnetic field on these chains. These chain aggregates consist mainly of Fe2O3, which play a vital role in magnetic storage devices. Diffraction pattern analysis and X-ray Photon Spectroscopy (XPS) were carried out to confirm that the chain aggregates consist of mainly ¦Ã-Fe2O3. The effect of magnetic field on diffusion flames was observed clearly and the color of the flame also became brighter indicating the increase in the flame intensity. The temperature increase at different locations in the flame was between 20 - 25˚C. The magnetic properties of the iron oxide particles formed were investigated using a Super conducting Quantum Interference Device (SQUID) magnetometer. It was observed that the magnetic properties such as Coercivity, Susceptibility and Permeability favor in magnetic storage devices when a magnetic field was applied. Thus, the effects of the application of external magnetic field on Fe(CO) 5 ¨C CO air diffusion flame are studied.
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Komuravelli, Nagaraju, "Study of the effects of magnetic field on the properties of combustion synthesized iron oxide nanoparticles" (2005). LSU Master's Theses. 2812.