Investigation of Mn2+ diffusion in lime (CaO) using electron magnetic resonance

Detalhes bibliográficos
Autor(a) principal: de Biasi,R. S.
Data de Publicação: 2014
Outros Autores: Grillo,M. L. N.
Tipo de documento: Artigo
Idioma: eng
Título da fonte: Materials research (São Carlos. Online)
Texto Completo: http://old.scielo.br/scielo.php?script=sci_arttext&pid=S1516-14392014000200022
Resumo: The electron magnetic resonance (EMR) technique was used to investigate the diffusion of Mn2+ in lime (CaO). The EMR absorption intensity was measured for several annealing times and three different temperatures of isothermal annealing: 1273, 1323 and 1373 K. The activation energy for diffusion, calculated from the experimental data using a theoretical model based on the Fick equation, was found to be E A = 266 ± 27 kJ. Mol- 1, about 30% larger than the activation energy for diffusion of Mn2+ in magnesia (MgO), a compound with the same crystal structure. The difference is attributed to the fact that the Ca2+ has a larger ionic radius than Mg2+.
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spelling Investigation of Mn2+ diffusion in lime (CaO) using electron magnetic resonanceceramicselectron magnetic resonancecalcium oxidemanganesediffusionThe electron magnetic resonance (EMR) technique was used to investigate the diffusion of Mn2+ in lime (CaO). The EMR absorption intensity was measured for several annealing times and three different temperatures of isothermal annealing: 1273, 1323 and 1373 K. The activation energy for diffusion, calculated from the experimental data using a theoretical model based on the Fick equation, was found to be E A = 266 ± 27 kJ. Mol- 1, about 30% larger than the activation energy for diffusion of Mn2+ in magnesia (MgO), a compound with the same crystal structure. The difference is attributed to the fact that the Ca2+ has a larger ionic radius than Mg2+.ABM, ABC, ABPol2014-04-01info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersiontext/htmlhttp://old.scielo.br/scielo.php?script=sci_arttext&pid=S1516-14392014000200022Materials Research v.17 n.2 2014reponame:Materials research (São Carlos. Online)instname:Universidade Federal de São Carlos (UFSCAR)instacron:ABM ABC ABPOL10.1590/S1516-14392014005000004info:eu-repo/semantics/openAccessde Biasi,R. S.Grillo,M. L. N.eng2014-05-06T00:00:00Zoai:scielo:S1516-14392014000200022Revistahttp://www.scielo.br/mrPUBhttps://old.scielo.br/oai/scielo-oai.phpdedz@power.ufscar.br1980-53731516-1439opendoar:2014-05-06T00:00Materials research (São Carlos. Online) - Universidade Federal de São Carlos (UFSCAR)false
dc.title.none.fl_str_mv Investigation of Mn2+ diffusion in lime (CaO) using electron magnetic resonance
title Investigation of Mn2+ diffusion in lime (CaO) using electron magnetic resonance
spellingShingle Investigation of Mn2+ diffusion in lime (CaO) using electron magnetic resonance
de Biasi,R. S.
ceramics
electron magnetic resonance
calcium oxide
manganese
diffusion
title_short Investigation of Mn2+ diffusion in lime (CaO) using electron magnetic resonance
title_full Investigation of Mn2+ diffusion in lime (CaO) using electron magnetic resonance
title_fullStr Investigation of Mn2+ diffusion in lime (CaO) using electron magnetic resonance
title_full_unstemmed Investigation of Mn2+ diffusion in lime (CaO) using electron magnetic resonance
title_sort Investigation of Mn2+ diffusion in lime (CaO) using electron magnetic resonance
author de Biasi,R. S.
author_facet de Biasi,R. S.
Grillo,M. L. N.
author_role author
author2 Grillo,M. L. N.
author2_role author
dc.contributor.author.fl_str_mv de Biasi,R. S.
Grillo,M. L. N.
dc.subject.por.fl_str_mv ceramics
electron magnetic resonance
calcium oxide
manganese
diffusion
topic ceramics
electron magnetic resonance
calcium oxide
manganese
diffusion
description The electron magnetic resonance (EMR) technique was used to investigate the diffusion of Mn2+ in lime (CaO). The EMR absorption intensity was measured for several annealing times and three different temperatures of isothermal annealing: 1273, 1323 and 1373 K. The activation energy for diffusion, calculated from the experimental data using a theoretical model based on the Fick equation, was found to be E A = 266 ± 27 kJ. Mol- 1, about 30% larger than the activation energy for diffusion of Mn2+ in magnesia (MgO), a compound with the same crystal structure. The difference is attributed to the fact that the Ca2+ has a larger ionic radius than Mg2+.
publishDate 2014
dc.date.none.fl_str_mv 2014-04-01
dc.type.driver.fl_str_mv info:eu-repo/semantics/article
dc.type.status.fl_str_mv info:eu-repo/semantics/publishedVersion
format article
status_str publishedVersion
dc.identifier.uri.fl_str_mv http://old.scielo.br/scielo.php?script=sci_arttext&pid=S1516-14392014000200022
url http://old.scielo.br/scielo.php?script=sci_arttext&pid=S1516-14392014000200022
dc.language.iso.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv 10.1590/S1516-14392014005000004
dc.rights.driver.fl_str_mv info:eu-repo/semantics/openAccess
eu_rights_str_mv openAccess
dc.format.none.fl_str_mv text/html
dc.publisher.none.fl_str_mv ABM, ABC, ABPol
publisher.none.fl_str_mv ABM, ABC, ABPol
dc.source.none.fl_str_mv Materials Research v.17 n.2 2014
reponame:Materials research (São Carlos. Online)
instname:Universidade Federal de São Carlos (UFSCAR)
instacron:ABM ABC ABPOL
instname_str Universidade Federal de São Carlos (UFSCAR)
instacron_str ABM ABC ABPOL
institution ABM ABC ABPOL
reponame_str Materials research (São Carlos. Online)
collection Materials research (São Carlos. Online)
repository.name.fl_str_mv Materials research (São Carlos. Online) - Universidade Federal de São Carlos (UFSCAR)
repository.mail.fl_str_mv dedz@power.ufscar.br
_version_ 1754212664636080128

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