Heating Rate on the Influence of Characteristics of MgO-Fe Nano ParticlesReport as inadecuate




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Nano-sized composite magnetic particles MgO -Fe were in situ-Combustion Synthesized when vacuum-sintered at 620℃ in the Mg-70.9wt%Fe3O4 system. In this paper, we discussed the heating rate on the influence of micro-morphology and the magnetic properties. It was indentified that: 5℃-min was the suitable heating rate, composite spherical particles with mean diameter 40nm distributed evenly. When the heating rate was 2℃-min, the heat could not aggregate effectively and the production of the intermediate product made the sample uneven distribution. nano-sized particles agglomerated to micro-sized spherical particles due to over sintering when the heating rate was 8℃-min. So the resistance was smaller when magnetized in outer magnetic field when sintered at 5℃-min, particles had better soft magnetic properties, and it was the future drug carrier materials.

KEYWORDS

magnetic nano-particles; in-situ reaction; superparamagnetic; drug carrier

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Author: Yuan-yuan Kong

Source: http://www.scirp.org/



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