Sintering of Ni-Zn ferrite nanopowders by the constant heating rate (CHR) method
Autor(a) principal: | |
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Data de Publicação: | 2004 |
Outros Autores: | , , , |
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=S1516-14392004000400003 |
Resumo: | The constant heating rate method employed in sintering studies offers several advantages over the isothermal method, particularly the fact that all the parameters that describe the sintering phenomena can be obtained from a single sample. The purpose of this work is to determine the parameters of sintering kinetics of nanosized Ni-Zn ferrite powders synthesized by combustion reaction. The nonisothermal sintering method was studied using a constant heating rate (CHR). The Ni-Zn ferrite powders, with average particle size varying from 18 nm to 29 nm, were uniaxially pressed and sintered in an horizontal dilatometer at a constant heating rate of 5.0 °C/min from 600 °C up to complete densification, which was reached at 1200 °C. The compacts were characterized by scanning electron microscopy (SEM). Experimental results revealed three different sintering stages, which were identified through the Bannister Theory. The shrinkage and the shrinkage rate analyzed showed a viscous contribution in the initial sintering stage, which was attributed to the mechanism of structural nanoparticle rearrangement. |
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Sintering of Ni-Zn ferrite nanopowders by the constant heating rate (CHR) methodNi-Zn ferritesinteringnanoparticleThe constant heating rate method employed in sintering studies offers several advantages over the isothermal method, particularly the fact that all the parameters that describe the sintering phenomena can be obtained from a single sample. The purpose of this work is to determine the parameters of sintering kinetics of nanosized Ni-Zn ferrite powders synthesized by combustion reaction. The nonisothermal sintering method was studied using a constant heating rate (CHR). The Ni-Zn ferrite powders, with average particle size varying from 18 nm to 29 nm, were uniaxially pressed and sintered in an horizontal dilatometer at a constant heating rate of 5.0 °C/min from 600 °C up to complete densification, which was reached at 1200 °C. The compacts were characterized by scanning electron microscopy (SEM). Experimental results revealed three different sintering stages, which were identified through the Bannister Theory. The shrinkage and the shrinkage rate analyzed showed a viscous contribution in the initial sintering stage, which was attributed to the mechanism of structural nanoparticle rearrangement.ABM, ABC, ABPol2004-12-01info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersiontext/htmlhttp://old.scielo.br/scielo.php?script=sci_arttext&pid=S1516-14392004000400003Materials Research v.7 n.4 2004reponame:Materials research (São Carlos. Online)instname:Universidade Federal de São Carlos (UFSCAR)instacron:ABM ABC ABPOL10.1590/S1516-14392004000400003info:eu-repo/semantics/openAccessCosta,Ana Cristina Figueiredo de MeloTortella,EdenerFagury Neto,EliasMorelli,Márcio RaymundoKiminami,Ruth Herta Goldschmidt Aliagaeng2005-11-08T00:00:00Zoai:scielo:S1516-14392004000400003Revistahttp://www.scielo.br/mrPUBhttps://old.scielo.br/oai/scielo-oai.phpdedz@power.ufscar.br1980-53731516-1439opendoar:2005-11-08T00:00Materials research (São Carlos. Online) - Universidade Federal de São Carlos (UFSCAR)false |
dc.title.none.fl_str_mv |
Sintering of Ni-Zn ferrite nanopowders by the constant heating rate (CHR) method |
title |
Sintering of Ni-Zn ferrite nanopowders by the constant heating rate (CHR) method |
spellingShingle |
Sintering of Ni-Zn ferrite nanopowders by the constant heating rate (CHR) method Costa,Ana Cristina Figueiredo de Melo Ni-Zn ferrite sintering nanoparticle |
title_short |
Sintering of Ni-Zn ferrite nanopowders by the constant heating rate (CHR) method |
title_full |
Sintering of Ni-Zn ferrite nanopowders by the constant heating rate (CHR) method |
title_fullStr |
Sintering of Ni-Zn ferrite nanopowders by the constant heating rate (CHR) method |
title_full_unstemmed |
Sintering of Ni-Zn ferrite nanopowders by the constant heating rate (CHR) method |
title_sort |
Sintering of Ni-Zn ferrite nanopowders by the constant heating rate (CHR) method |
author |
Costa,Ana Cristina Figueiredo de Melo |
author_facet |
Costa,Ana Cristina Figueiredo de Melo Tortella,Edener Fagury Neto,Elias Morelli,Márcio Raymundo Kiminami,Ruth Herta Goldschmidt Aliaga |
author_role |
author |
author2 |
Tortella,Edener Fagury Neto,Elias Morelli,Márcio Raymundo Kiminami,Ruth Herta Goldschmidt Aliaga |
author2_role |
author author author author |
dc.contributor.author.fl_str_mv |
Costa,Ana Cristina Figueiredo de Melo Tortella,Edener Fagury Neto,Elias Morelli,Márcio Raymundo Kiminami,Ruth Herta Goldschmidt Aliaga |
dc.subject.por.fl_str_mv |
Ni-Zn ferrite sintering nanoparticle |
topic |
Ni-Zn ferrite sintering nanoparticle |
description |
The constant heating rate method employed in sintering studies offers several advantages over the isothermal method, particularly the fact that all the parameters that describe the sintering phenomena can be obtained from a single sample. The purpose of this work is to determine the parameters of sintering kinetics of nanosized Ni-Zn ferrite powders synthesized by combustion reaction. The nonisothermal sintering method was studied using a constant heating rate (CHR). The Ni-Zn ferrite powders, with average particle size varying from 18 nm to 29 nm, were uniaxially pressed and sintered in an horizontal dilatometer at a constant heating rate of 5.0 °C/min from 600 °C up to complete densification, which was reached at 1200 °C. The compacts were characterized by scanning electron microscopy (SEM). Experimental results revealed three different sintering stages, which were identified through the Bannister Theory. The shrinkage and the shrinkage rate analyzed showed a viscous contribution in the initial sintering stage, which was attributed to the mechanism of structural nanoparticle rearrangement. |
publishDate |
2004 |
dc.date.none.fl_str_mv |
2004-12-01 |
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=S1516-14392004000400003 |
url |
http://old.scielo.br/scielo.php?script=sci_arttext&pid=S1516-14392004000400003 |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.relation.none.fl_str_mv |
10.1590/S1516-14392004000400003 |
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.7 n.4 2004 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_ |
1754212657758470144 |