Journal
RSC ADVANCES
Volume 4, Issue 13, Pages 6383-6390Publisher
ROYAL SOC CHEMISTRY
DOI: 10.1039/c3ra45925j
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Funding
- Structural Ceramics Engineering Center, Shanghai Institute of Ceramics, Chinese Academy of Science, Shanghai, China
- National Natural Science Foundation of China (NSFC) [51071167, 51102266]
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In the present research, large iron oxide microparticles with large sizes in the range of 1-5 mm have been facilely synthesized by a modified polyol method with NaBH4 as a versatile strong reducing agent. We found that the highly homogeneous iron oxide microparticles' novel structure is the best pure crystal phase of alpha-Fe2O3 in terms of polyhedral morphology and shape in existence. There are no diffraction peaks of other crystal phases from impurities in alpha-Fe2O3 microparticle products in the crystal growth. Interestingly, a new method of heat treatment or atomic surface deformation allowed for the discovery of a new large alpha-Fe2O3 structure with controlled specific alpha-Fe2O3 oxide grains in the crystal structure. The severe surface deformation of sharp, polyhedral, large alpha-Fe2O3 microparticles under a sintering treatment was found to give un-sharp, polyhedral large alpha-Fe2O3 microparticles with specific grains and boundaries.
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