{"@context":{"@vocab":"https://cir.nii.ac.jp/schema/1.0/","rdfs":"http://www.w3.org/2000/01/rdf-schema#","dc":"http://purl.org/dc/elements/1.1/","dcterms":"http://purl.org/dc/terms/","foaf":"http://xmlns.com/foaf/0.1/","prism":"http://prismstandard.org/namespaces/basic/2.0/","cinii":"http://ci.nii.ac.jp/ns/1.0/","datacite":"https://schema.datacite.org/meta/kernel-4/","ndl":"http://ndl.go.jp/dcndl/terms/","jpcoar":"https://github.com/JPCOAR/schema/blob/master/2.0/"},"@id":"https://cir.nii.ac.jp/crid/1360580232379243136.json","@type":"Article","productIdentifier":[{"identifier":{"@type":"DOI","@value":"10.1016/j.jssc.2021.122441"}},{"identifier":{"@type":"URI","@value":"https://api.elsevier.com/content/article/PII:S0022459621004862?httpAccept=text/xml"}},{"identifier":{"@type":"URI","@value":"https://api.elsevier.com/content/article/PII:S0022459621004862?httpAccept=text/plain"}}],"resourceType":"学術雑誌論文(journal article)","dc:title":[{"@value":"Low-temperature hydrogen reduction of iron oxide by controlling the water potential using a CaH2 drying agent"}],"description":[{"notation":[{"@value":"Abstract   Lowering the reduction temperature of iron oxide is of great significance in applied engineering, but challenging to achieve in a hydrogen tube furnace as the partial pressure of hydrogen is limited to 1 ​atm. In this study CaH2 was used as a drying agent to control the partial pressure of water vapor to lower the reduction potential of iron oxide. By comparing the extent of formation of the reduction product α-Fe in Fe3O4 reduced under hydrogen with and without CaH2 at various temperatures, the presence of CaH2 was shown to lower the temperature required for complete reduction from 400 ​°C to 300 ​°C accompanied by an increase in the H2/H2O ratio of the outlet gas. Thermodynamic calculations indicated that the addition of CaH2 increases the reduction potential, causing a higher production ratio of α-Fe. These findings indicate that CaH2 promotes reduction by efficiently absorbing the water vapor generated during reduction."}]}],"creator":[{"@id":"https://cir.nii.ac.jp/crid/1380017284594486658","@type":"Researcher","personIdentifier":[{"@type":"RESEARCHMAP","@value":"https://researchmap.jp/t_tsuchida"}],"foaf:name":[{"@value":"Takayuki Tsuchida"}]},{"@id":"https://cir.nii.ac.jp/crid/1380580232379243140","@type":"Researcher","foaf:name":[{"@value":"Jun Fukushima"}]},{"@id":"https://cir.nii.ac.jp/crid/1380580232379243146","@type":"Researcher","foaf:name":[{"@value":"Masahiro Tobise"}]},{"@id":"https://cir.nii.ac.jp/crid/1380580232379243019","@type":"Researcher","foaf:name":[{"@value":"Yamato Hayashi"}]},{"@id":"https://cir.nii.ac.jp/crid/1380580232379243268","@type":"Researcher","foaf:name":[{"@value":"Hirotsugu Takizawa"}]}],"publication":{"publicationIdentifier":[{"@type":"PISSN","@value":"00224596"}],"prism:publicationName":[{"@value":"Journal of Solid State Chemistry"}],"dc:publisher":[{"@value":"Elsevier BV"}],"prism:publicationDate":"2021-10","prism:volume":"302","prism:startingPage":"122441"},"reviewed":"false","dc:rights":["https://www.elsevier.com/tdm/userlicense/1.0/","https://www.elsevier.com/legal/tdmrep-license","http://www.elsevier.com/open-access/userlicense/1.0/","https://doi.org/10.15223/policy-017","https://doi.org/10.15223/policy-037","https://doi.org/10.15223/policy-012","https://doi.org/10.15223/policy-029","https://doi.org/10.15223/policy-004"],"url":[{"@id":"https://api.elsevier.com/content/article/PII:S0022459621004862?httpAccept=text/xml"},{"@id":"https://api.elsevier.com/content/article/PII:S0022459621004862?httpAccept=text/plain"}],"createdAt":"2021-07-22","modifiedAt":"2025-09-20","project":[{"@id":"https://cir.nii.ac.jp/crid/1040848250603384192","@type":"Project","projectIdentifier":[{"@type":"KAKEN","@value":"19H05612"},{"@type":"JGN","@value":"JP19H05612"},{"@type":"URI","@value":"https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-19H05612/"}],"notation":[{"@language":"ja","@value":"軽元素を利用した新しい物質合成法の確立と希土類フリー磁石材料への展開"},{"@language":"en","@value":"Establishment 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