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Proceedings of the 7th National Conference on Functional Materials and Applications (FMA 2010 E-BOOK)

Changsha,China,10.16-10.18,2010

ISBN: 978-1-935068-41-9 Scientific Research Publishing, USA

E-Book 2313pp Pub. Date: October 2010

Category: Chemistry & Materials Science

Price: $360

Title: Heating Rate on the Influence of Characteristics of MgO/Fe Nano Particles
Source: Proceedings of the 7th National Conference on Functional Materials and Applications (FMA 2010 E-BOOK) (pp 297-300)
Author(s): Yuan-yuan Kong, Department of Physics & Electronic Science TONGREN University TongRen, China Chinese Academy of Sciences, Changchun 130033, China
Abstract: 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.
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