Thermal stability and microstructure characterization of MgAl2O4 nanoparticles synthesized by reverse microemulsion method
Autor(a) principal: | |
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Data de Publicação: | 2013 |
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=S1516-14392013000400021 |
Resumo: | Magnesium aluminate (MgAl2O4) spinel nanoparticles were synthesized by reverse microemulsion process in cyclohexane by using two kinds of surfactants, n-amyl alcohol as cosurfactant and mixture of aluminic/magnesic salt aqueous solution as basic reagents. The effects of surfactant types and titration methods on the morphologies and sizes of the MgAl2O4 nanoparticles were characterized by TEM, TGA-DTA, XRD, HR-TEM and FT-IR. TEM images show that the particles prepared by forward-titration method with SPAN-80/Triton X-100 compound emulsifier have uniform spherical shape and good monodispersity with an average size of 9.5 nm. However, the average size of the particles prepared by reverse-titration method was about 10 nm and some particles have irregular platelike appearance. The products prepared with NP-40 surfactant and forward-titration method were agglomerated with an average size of 13 nm. TGA and XRD results show that the reverse microemulsion method has dramatically lowered the calcination temperature of MgAl2O4 with a degree of 700 °C, and the precursor can transform to single spinel phase at 900 °C. |
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Materials research (São Carlos. Online) |
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Thermal stability and microstructure characterization of MgAl2O4 nanoparticles synthesized by reverse microemulsion methodMgAl2O4spinel nanoparticlesreverse microemulsionmicrostructure analysisMagnesium aluminate (MgAl2O4) spinel nanoparticles were synthesized by reverse microemulsion process in cyclohexane by using two kinds of surfactants, n-amyl alcohol as cosurfactant and mixture of aluminic/magnesic salt aqueous solution as basic reagents. The effects of surfactant types and titration methods on the morphologies and sizes of the MgAl2O4 nanoparticles were characterized by TEM, TGA-DTA, XRD, HR-TEM and FT-IR. TEM images show that the particles prepared by forward-titration method with SPAN-80/Triton X-100 compound emulsifier have uniform spherical shape and good monodispersity with an average size of 9.5 nm. However, the average size of the particles prepared by reverse-titration method was about 10 nm and some particles have irregular platelike appearance. The products prepared with NP-40 surfactant and forward-titration method were agglomerated with an average size of 13 nm. TGA and XRD results show that the reverse microemulsion method has dramatically lowered the calcination temperature of MgAl2O4 with a degree of 700 °C, and the precursor can transform to single spinel phase at 900 °C.ABM, ABC, ABPol2013-08-01info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersiontext/htmlhttp://old.scielo.br/scielo.php?script=sci_arttext&pid=S1516-14392013000400021Materials Research v.16 n.4 2013reponame:Materials research (São Carlos. Online)instname:Universidade Federal de São Carlos (UFSCAR)instacron:ABM ABC ABPOL10.1590/S1516-14392013005000062info:eu-repo/semantics/openAccessFu,PingLu,WenzhongLei,WenWu,KeXu,YongWu,Jiamineng2013-08-02T00:00:00Zoai:scielo:S1516-14392013000400021Revistahttp://www.scielo.br/mrPUBhttps://old.scielo.br/oai/scielo-oai.phpdedz@power.ufscar.br1980-53731516-1439opendoar:2013-08-02T00:00Materials research (São Carlos. Online) - Universidade Federal de São Carlos (UFSCAR)false |
dc.title.none.fl_str_mv |
Thermal stability and microstructure characterization of MgAl2O4 nanoparticles synthesized by reverse microemulsion method |
title |
Thermal stability and microstructure characterization of MgAl2O4 nanoparticles synthesized by reverse microemulsion method |
spellingShingle |
Thermal stability and microstructure characterization of MgAl2O4 nanoparticles synthesized by reverse microemulsion method Fu,Ping MgAl2O4 spinel nanoparticles reverse microemulsion microstructure analysis |
title_short |
Thermal stability and microstructure characterization of MgAl2O4 nanoparticles synthesized by reverse microemulsion method |
title_full |
Thermal stability and microstructure characterization of MgAl2O4 nanoparticles synthesized by reverse microemulsion method |
title_fullStr |
Thermal stability and microstructure characterization of MgAl2O4 nanoparticles synthesized by reverse microemulsion method |
title_full_unstemmed |
Thermal stability and microstructure characterization of MgAl2O4 nanoparticles synthesized by reverse microemulsion method |
title_sort |
Thermal stability and microstructure characterization of MgAl2O4 nanoparticles synthesized by reverse microemulsion method |
author |
Fu,Ping |
author_facet |
Fu,Ping Lu,Wenzhong Lei,Wen Wu,Ke Xu,Yong Wu,Jiamin |
author_role |
author |
author2 |
Lu,Wenzhong Lei,Wen Wu,Ke Xu,Yong Wu,Jiamin |
author2_role |
author author author author author |
dc.contributor.author.fl_str_mv |
Fu,Ping Lu,Wenzhong Lei,Wen Wu,Ke Xu,Yong Wu,Jiamin |
dc.subject.por.fl_str_mv |
MgAl2O4 spinel nanoparticles reverse microemulsion microstructure analysis |
topic |
MgAl2O4 spinel nanoparticles reverse microemulsion microstructure analysis |
description |
Magnesium aluminate (MgAl2O4) spinel nanoparticles were synthesized by reverse microemulsion process in cyclohexane by using two kinds of surfactants, n-amyl alcohol as cosurfactant and mixture of aluminic/magnesic salt aqueous solution as basic reagents. The effects of surfactant types and titration methods on the morphologies and sizes of the MgAl2O4 nanoparticles were characterized by TEM, TGA-DTA, XRD, HR-TEM and FT-IR. TEM images show that the particles prepared by forward-titration method with SPAN-80/Triton X-100 compound emulsifier have uniform spherical shape and good monodispersity with an average size of 9.5 nm. However, the average size of the particles prepared by reverse-titration method was about 10 nm and some particles have irregular platelike appearance. The products prepared with NP-40 surfactant and forward-titration method were agglomerated with an average size of 13 nm. TGA and XRD results show that the reverse microemulsion method has dramatically lowered the calcination temperature of MgAl2O4 with a degree of 700 °C, and the precursor can transform to single spinel phase at 900 °C. |
publishDate |
2013 |
dc.date.none.fl_str_mv |
2013-08-01 |
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=S1516-14392013000400021 |
url |
http://old.scielo.br/scielo.php?script=sci_arttext&pid=S1516-14392013000400021 |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.relation.none.fl_str_mv |
10.1590/S1516-14392013005000062 |
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.16 n.4 2013 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_ |
1754212662898589696 |