Solid state reactions in the Fe2O3-CaCO3-In2O3 system
Identifieur interne : 000406 ( Main/Exploration ); précédent : 000405; suivant : 000407Solid state reactions in the Fe2O3-CaCO3-In2O3 system
Auteurs : RBID : ISTEX:10853_1990_Article_BF00638027.pdfAbstract
The kinetics of solid-state reactions of powdered reactants were investigated by X-ray and by differential thermogravimetry in a magnetic field. Measurements revealed mutual diffusion of the Fe3+ and In3+ ions in the Fe2O3-In2O3 system heat treated for 3 h at 700 to 1400° C. Diffusion of indium into the Fe2O3 lattice caused a shift of the Curie temperature of the antiferromagnetic iron oxide towards lower temperatures. Only Caln2O4 was found between CaCO3 and In2O3 up to 1400° C. Also, in the Fe2O3-CaCO3-In2O3in system, the reaction started with the mutual diffusion of iron and indium and the forming of CaFe2O4. End-products were the magnetic α-Ca4Fe14O25 and CaFe4O7, and the non-magnetic CaFe5O7, depending on the In3+ concentration. Indium stabilized the magnetic calcium-iron oxide structures, shifting their Curie temperatures towards lower values.
DOI: 10.1007/BF00638027
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Measurements revealed mutual diffusion of the Fe3+ and In3+ ions in the Fe2O3-In2O3 system heat treated for 3 h at 700 to 1400° C. Diffusion of indium into the Fe2O3 lattice caused a shift of the Curie temperature of the antiferromagnetic iron oxide towards lower temperatures. Only Caln2O4 was found between CaCO3 and In2O3 up to 1400° C. Also, in the Fe2O3-CaCO3-In2O3in system, the reaction started with the mutual diffusion of iron and indium and the forming of CaFe2O4. End-products were the magnetic α-Ca4Fe14O25 and CaFe4O7, and the non-magnetic CaFe5O7, depending on the In3+ concentration. Indium stabilized the magnetic calcium-iron oxide structures, shifting their Curie temperatures towards lower values.</div></front></TEI><mods xsi:schemaLocation="http://www.loc.gov/mods/v3 file:///applis/istex/home/loadistex/home/etc/xsd/mods.xsd" version="3.4" istexId="ae6e38957cf7f0114f6322d7e8c679af2c8b9868"><titleInfo lang="eng"><title>Solid state reactions in the Fe2O3-CaCO3-In2O3 system</title></titleInfo><name type="personal"><namePart type="given">Anna</namePart><namePart type="family">Sztaniszlav</namePart><role><roleTerm type="text">author</roleTerm></role><affiliation>Research Institute for Telecommunications, POB 76, H-1325, Budapest, Hungary</affiliation></name><name type="personal"><namePart type="given">Magdolna</namePart><namePart type="family">Balla</namePart><role><roleTerm type="text">author</roleTerm></role><affiliation>Research Institute for Telecommunications, POB 76, H-1325, Budapest, Hungary</affiliation></name><name type="personal"><namePart type="given">Maria</namePart><namePart type="family">Farkas-Jahnke</namePart><role><roleTerm type="text">author</roleTerm></role><affiliation>Research Institute for Technical Physics of the Hungarian Academy of Sciences, Fóti út 56, H-1047, Budapest, Hungary</affiliation></name><name type="personal"><namePart type="given">Csaba</namePart><namePart type="family">Novák</namePart><role><roleTerm type="text">author</roleTerm></role><affiliation>Institute for General and Analytical Chemistry of the Technical University, Gellért tér 4, H-1502, Budapest, Hungary</affiliation></name><typeOfResource>text</typeOfResource><genre>Original Paper</genre><originInfo><publisher>Kluwer Academic Publishers, Dordrecht</publisher><dateCreated encoding="w3cdtf">1989-01-06</dateCreated><dateCaptured encoding="w3cdtf">1989-08-23</dateCaptured><dateValid encoding="w3cdtf">2004-10-28</dateValid><copyrightDate encoding="w3cdtf">1990</copyrightDate></originInfo><language><languageTerm type="code" authority="iso639-2b">eng</languageTerm></language><physicalDescription><internetMediaType>text/html</internetMediaType></physicalDescription><abstract lang="eng">The kinetics of solid-state reactions of powdered reactants were investigated by X-ray and by differential thermogravimetry in a magnetic field. Measurements revealed mutual diffusion of the Fe3+ and In3+ ions in the Fe2O3-In2O3 system heat treated for 3 h at 700 to 1400° C. Diffusion of indium into the Fe2O3 lattice caused a shift of the Curie temperature of the antiferromagnetic iron oxide towards lower temperatures. Only Caln2O4 was found between CaCO3 and In2O3 up to 1400° C. Also, in the Fe2O3-CaCO3-In2O3in system, the reaction started with the mutual diffusion of iron and indium and the forming of CaFe2O4. End-products were the magnetic α-Ca4Fe14O25 and CaFe4O7, and the non-magnetic CaFe5O7, depending on the In3+ concentration. Indium stabilized the magnetic calcium-iron oxide structures, shifting their Curie temperatures towards lower values.</abstract><relatedItem type="series"><titleInfo type="abbreviated"><title>J Mater Sci</title></titleInfo><titleInfo><title>Journal of Materials Science</title><partNumber>Year: 1990</partNumber><partNumber>Volume: 25</partNumber><partNumber>Number: 5</partNumber></titleInfo><genre>Archive Journal</genre><originInfo><dateIssued encoding="w3cdtf">1990-05-01</dateIssued><copyrightDate encoding="w3cdtf">1990</copyrightDate></originInfo><subject usage="primary"><topic>Chemistry</topic><topic>Polymer Sciences</topic><topic>Industrial Chemistry/Chemical Engineering</topic><topic>Characterization and Evaluation Materials</topic><topic>Mechanics</topic></subject><identifier type="issn">0022-2461</identifier><identifier type="issn">Electronic: 1573-4803</identifier><identifier type="matrixNumber">10853</identifier><identifier type="local">IssueArticleCount: 55</identifier><recordInfo><recordOrigin>Chapman and Hall Ltd., 1990</recordOrigin></recordInfo></relatedItem><identifier type="doi">10.1007/BF00638027</identifier><identifier type="matrixNumber">Art10</identifier><identifier type="local">BF00638027</identifier><accessCondition type="use and reproduction">MetadataGrant: OpenAccess</accessCondition><accessCondition type="use and reproduction">AbstractGrant: OpenAccess</accessCondition><accessCondition type="restriction on access">BodyPDFGrant: Restricted</accessCondition><accessCondition type="restriction on access">BodyHTMLGrant: Restricted</accessCondition><accessCondition type="restriction on access">BibliographyGrant: Restricted</accessCondition><accessCondition type="restriction on access">ESMGrant: Restricted</accessCondition><part><extent unit="pages"><start>2353</start><end>2358</end></extent></part><recordInfo><recordOrigin>Chapman and Hall Ltd., 1990</recordOrigin><recordIdentifier>10853_1990_Article_BF00638027.pdf</recordIdentifier></recordInfo></mods></record>Pour manipuler ce document sous Unix (Dilib)
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