Chemical reduction of hematite by sodium borohydride.

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dc.contributor.authorResende, Valdirene Gonzaga de
dc.contributor.authorCosta, Geraldo Magela da
dc.contributor.authorGrave, Eddy De
dc.contributor.authorDantas, Lucien
dc.date.accessioned2017-05-30T13:22:19Z
dc.date.available2017-05-30T13:22:19Z
dc.date.issued2005
dc.description.abstractWell-crystallized hematite was suspended in water and treated at roomtemperature (RT) with sodium borohydride. The product of the reaction is a highly magnetic black powder, which is stable at RT. The NaBH4 treatment converts about half of the hematite to an amorphous Fe–B alloy and to a small fraction of sub-micron sized, amorphous metallic-Fe nodules. Heating at 400°C of this composite has resulted in the crystallization and/or oxidation of more than half of the amorphous Fe–B phase to α-Fe and Fe3O4 and B2O3, respectively. After treatment at 800°C, the metallic Fe and the amorphous Fe–B have completely vanished, and the resulting product consists of hematite and FeBO3 embedded in the matrix of α-Fe2O3.pt_BR
dc.identifier.citationRESENDE, V. G. de et al. Chemical reduction of hematite by sodium borohydride. Hyperfine Interactions, Netherlands, v. 165, n.1-4, p. 113-119, 2005. Disponível em: <https://link.springer.com/article/10.1007/s10751-006-9254-0>. Acesso em: 20 abr. 2017.pt_BR
dc.identifier.doihttps://doi.org/10.1007/s10751-006-9254-0
dc.identifier.issn1572-9540
dc.identifier.urihttp://www.repositorio.ufop.br/handle/123456789/7815
dc.identifier.uri2https://link.springer.com/article/10.1007/s10751-006-9254-0pt_BR
dc.language.isoen_USpt_BR
dc.rightsrestritopt_BR
dc.subjectFe–B alloypt_BR
dc.subjectHematitept_BR
dc.subjectSodium borohydridept_BR
dc.subjectMössbauerpt_BR
dc.titleChemical reduction of hematite by sodium borohydride.pt_BR
dc.typeArtigo publicado em periodicopt_BR

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