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Hydrothermal synthesis of SrFe 12O 19 and its characterization
KTH, Skolan för informations- och kommunikationsteknik (ICT), Materialfysik, Funktionella material, FNM.ORCID-id: 0000-0001-5678-5298
2012 (engelsk)Inngår i: Journal of Superconductivity and Novel Magnetism, ISSN 1557-1939, Vol. 25, nr 6, s. 2081-2085Artikkel i tidsskrift (Fagfellevurdert) Published
Abstract [en]

We have synthesized strontium hexaferrite particles in an alkaline medium using a hydrothermal process at 180°C. Crystalline phase of samples were determined by XRD and spectroscopic, morphological, and magnetic investigation of the sample were FT-IR, SEM, and TG analysis, respectively. XRD analysis revealed few impurity phases in the as-made powder; upon calcinations, the material is converted to desired hexaferrite phase. As synthesized powder exhibits agglomerates with rather smooth facets, in the form of thick platelets. Upon calcination, all these structures were observed to transfer to rod-like structures. The As calcined sample has high specific saturation magnetization (Ms ) values of 65 emu/g that is close to its theoretical value of 74.3 emu/g but the hydrothermally synthesized sample does not. This is in agreement with the observations from XRD analysis where few impurity phases observed in the as-made powder cause a weak magnetic response. Upon calcination, the material is converted to a desired hexaferrite phase with better magnetic properties.

sted, utgiver, år, opplag, sider
2012. Vol. 25, nr 6, s. 2081-2085
Emneord [en]
Hard magnet, Hydrothermal synthesis, Magnetic nanoparticles, Strontium hexaferrite
HSV kategori
Identifikatorer
URN: urn:nbn:se:kth:diva-101541DOI: 10.1007/s10948-012-1587-0ISI: 000309157100068Scopus ID: 2-s2.0-84864613222OAI: oai:DiVA.org:kth-101541DiVA, id: diva2:549281
Merknad

QC 20120904

Tilgjengelig fra: 2012-09-04 Laget: 2012-08-30 Sist oppdatert: 2012-11-01bibliografisk kontrollert

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