Full metadata record
DC Field | Value | Language |
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dc.contributor.author | Yun, Han-Sol | - |
dc.contributor.author | Shin, So-Young | - |
dc.contributor.author | Park, Kwon-Jin | - |
dc.contributor.author | You, Chun-Yeol | - |
dc.contributor.author | Cho, Nam-Hee | - |
dc.date.accessioned | 2021-08-24T20:06:49Z | - |
dc.date.available | 2021-08-24T20:06:49Z | - |
dc.date.created | 2021-03-11 | - |
dc.date.issued | 2021-05 | - |
dc.identifier.issn | 1738-8090 | - |
dc.identifier.uri | http://hdl.handle.net/20.500.11750/14011 | - |
dc.description.abstract | Herein, the effect of microwave irradiation on the formation of γ-Fe2O3 phase was investigated. The structural and chemical features of the γ-Fe2O3 synthesized via microwave-assisted heat treatment (MWH) were examined in terms of precursors. Three different types of precursors, i.e., FeC2O4∙2H2O (FH), FeOOH, and Fe3O4, were used, and each precursor was heated in a temperature range of 100–300 °C via MWH. Nanocrystalline γ-Fe2O3 powders with a crystallite size of ~ 19 nm were synthesized when the source FH was heat-treated at 120 °C for 20 min by MWH. The activation energy required for the formation of γ-Fe2O3 powders was 21.4 kJ/mol, which is approximately one-third or one-quarter of the activation energy (68.5 and 87.9 kJ/mol) reported for the synthesis of γ-Fe2O3 via conventional heating. The lattice parameter of the synthesized γ-Fe2O3 phase expanded to 8.360 Å at 120 °C, whereas it contracted to 8.351 Å at 200 °C. This variation can be attributed to the content of the surface-absorbed OH group. The values of the saturated magnetization and coercive force of the powders increased by approximately threefold with increasing crystallinity. Graphic Abstract: [Figure not available: see fulltext.] © 2021, The Korean Institute of Metals and Materials. | - |
dc.language | English | - |
dc.publisher | Korean Institute of Metals and Materials | - |
dc.title | Synthesis of Nanoscale gamma-Fe2O3 Powders with Hydrates via Microwave-Assisted Heat Treatment | - |
dc.type | Article | - |
dc.identifier.doi | 10.1007/s13391-021-00276-x | - |
dc.identifier.wosid | 000621261100001 | - |
dc.identifier.scopusid | 2-s2.0-85101506105 | - |
dc.identifier.bibliographicCitation | Electronic Materials Letters, v.17, no.3, pp.240 - 249 | - |
dc.identifier.kciid | ART002714294 | - |
dc.description.isOpenAccess | FALSE | - |
dc.subject.keywordAuthor | Activation energy | - |
dc.subject.keywordAuthor | Hydrates | - |
dc.subject.keywordAuthor | Maghemite | - |
dc.subject.keywordAuthor | Magnetic property | - |
dc.subject.keywordAuthor | Microwave‐assisted heat treatment | - |
dc.subject.keywordPlus | IRON-OXIDE NANOPARTICLES | - |
dc.subject.keywordPlus | GRAIN-GROWTH | - |
dc.subject.keywordPlus | MAGNETIC-PROPERTIES | - |
dc.subject.keywordPlus | XPS SPECTRA | - |
dc.subject.keywordPlus | TEMPERATURE | - |
dc.subject.keywordPlus | NANOCRYSTALS | - |
dc.subject.keywordPlus | OXIDATION | - |
dc.subject.keywordPlus | MAGHEMITE | - |
dc.subject.keywordPlus | BATIO3 | - |
dc.subject.keywordPlus | SIZE | - |
dc.citation.endPage | 249 | - |
dc.citation.number | 3 | - |
dc.citation.startPage | 240 | - |
dc.citation.title | Electronic Materials Letters | - |
dc.citation.volume | 17 | - |
dc.description.journalRegisteredClass | scie | - |
dc.description.journalRegisteredClass | scopus | - |
dc.description.journalRegisteredClass | kci | - |
dc.relation.journalResearchArea | Materials Science | - |
dc.relation.journalWebOfScienceCategory | Materials Science, Multidisciplinary | - |
dc.type.docType | Article | - |
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