Abstract
Influences of mixing-grinding conditions on the properties of magnetite powders synthesized from the metallic-iron and hydrated iron [III] oxide powders in organic liquids containing hydrogen peroxide were investigated. The calcination products were characterized by X-ray diffractometry and 57Mossbauer spectroscopy. The yield of magnetite increased with the milling time and revolution frequency. The synthesis of magnetite powder was almost complete at 300rpm for 5 hours. After calcination at 773K in Ar, calcination product γ-(FeIII)A(FeII0.58III1.28)BO4, was highly non-stoichiometric compound. The degree of non-stoichiometry increased with the yield of magnetite. For the calcinations in Ar, the degree of non-stoichiometry decreased by the reaction with residual iron. The addition of H2O2 suppressed the reaction of Fe and FeO(OH) to form magnetite.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callMore From: Journal of the Society of Powder Technology, Japan
Disclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
