Synthesis of stabilized zirconia without dopants

Detalhes bibliográficos
Autor(a) principal: Pessoa,R. C.
Data de Publicação: 2008
Outros Autores: Cerqueira,M., Nasar,R. S., Yoshida,I. V. P.
Tipo de documento: Artigo
Idioma: eng
Título da fonte: Cerâmica (São Paulo. Online)
Texto Completo: http://old.scielo.br/scielo.php?script=sci_arttext&pid=S0366-69132008000200016
Resumo: ZrO2-SiO2 powders were synthesized through Pechini's method starting with D4Vi, PMS and zirconium citrate. The complex polymer was decomposed to form different phases at high temperatures. During the resin decomposition, the phase transformation from monoclinic to tetragonal zirconia was detected by thermal analysis. The crystallization and the diffusion process of Si and Zr were analyzed by X-ray diffraction, XRD, scanning electron microscopy and microanalysis by EDS. Tetragonal zirconia at 1000 ºC, monoclinic zirconia at 1200 ºC and monoclinic zirconia with cristobalite silica from 1300 º to 1400 ºC were formed. From 1000 ºC to 1300 ºC a diffuse amorphous band was related to the silica phase. The mapping of Kα line of Zr and Si showed low diffusion of Si into the ZrO2 structure. The kinetics of crystallization formed macroparticles of silica and small particles of zirconia. A diffusion interface between SiO2 and ZrO2 to form ZrSiO4 phase was not observed, confirmed by XRD.
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spelling Synthesis of stabilized zirconia without dopantsPechini methodzirconia stabilizationEDS microanalysisZrO2-SiO2 powders were synthesized through Pechini's method starting with D4Vi, PMS and zirconium citrate. The complex polymer was decomposed to form different phases at high temperatures. During the resin decomposition, the phase transformation from monoclinic to tetragonal zirconia was detected by thermal analysis. The crystallization and the diffusion process of Si and Zr were analyzed by X-ray diffraction, XRD, scanning electron microscopy and microanalysis by EDS. Tetragonal zirconia at 1000 ºC, monoclinic zirconia at 1200 ºC and monoclinic zirconia with cristobalite silica from 1300 º to 1400 ºC were formed. From 1000 ºC to 1300 ºC a diffuse amorphous band was related to the silica phase. The mapping of Kα line of Zr and Si showed low diffusion of Si into the ZrO2 structure. The kinetics of crystallization formed macroparticles of silica and small particles of zirconia. A diffusion interface between SiO2 and ZrO2 to form ZrSiO4 phase was not observed, confirmed by XRD.Associação Brasileira de Cerâmica2008-06-01info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersiontext/htmlhttp://old.scielo.br/scielo.php?script=sci_arttext&pid=S0366-69132008000200016Cerâmica v.54 n.330 2008reponame:Cerâmica (São Paulo. Online)instname:Universidade de São Paulo (USP)instacron:USP10.1590/S0366-69132008000200016info:eu-repo/semantics/openAccessPessoa,R. C.Cerqueira,M.Nasar,R. S.Yoshida,I. V. P.eng2008-08-14T00:00:00Zoai:scielo:S0366-69132008000200016Revistahttps://www.scielo.br/j/ce/PUBhttps://old.scielo.br/oai/scielo-oai.phpceram.abc@gmail.com||ceram.abc@gmail.com1678-45530366-6913opendoar:2008-08-14T00:00Cerâmica (São Paulo. Online) - Universidade de São Paulo (USP)false
dc.title.none.fl_str_mv Synthesis of stabilized zirconia without dopants
title Synthesis of stabilized zirconia without dopants
spellingShingle Synthesis of stabilized zirconia without dopants
Pessoa,R. C.
Pechini method
zirconia stabilization
EDS microanalysis
title_short Synthesis of stabilized zirconia without dopants
title_full Synthesis of stabilized zirconia without dopants
title_fullStr Synthesis of stabilized zirconia without dopants
title_full_unstemmed Synthesis of stabilized zirconia without dopants
title_sort Synthesis of stabilized zirconia without dopants
author Pessoa,R. C.
author_facet Pessoa,R. C.
Cerqueira,M.
Nasar,R. S.
Yoshida,I. V. P.
author_role author
author2 Cerqueira,M.
Nasar,R. S.
Yoshida,I. V. P.
author2_role author
author
author
dc.contributor.author.fl_str_mv Pessoa,R. C.
Cerqueira,M.
Nasar,R. S.
Yoshida,I. V. P.
dc.subject.por.fl_str_mv Pechini method
zirconia stabilization
EDS microanalysis
topic Pechini method
zirconia stabilization
EDS microanalysis
description ZrO2-SiO2 powders were synthesized through Pechini's method starting with D4Vi, PMS and zirconium citrate. The complex polymer was decomposed to form different phases at high temperatures. During the resin decomposition, the phase transformation from monoclinic to tetragonal zirconia was detected by thermal analysis. The crystallization and the diffusion process of Si and Zr were analyzed by X-ray diffraction, XRD, scanning electron microscopy and microanalysis by EDS. Tetragonal zirconia at 1000 ºC, monoclinic zirconia at 1200 ºC and monoclinic zirconia with cristobalite silica from 1300 º to 1400 ºC were formed. From 1000 ºC to 1300 ºC a diffuse amorphous band was related to the silica phase. The mapping of Kα line of Zr and Si showed low diffusion of Si into the ZrO2 structure. The kinetics of crystallization formed macroparticles of silica and small particles of zirconia. A diffusion interface between SiO2 and ZrO2 to form ZrSiO4 phase was not observed, confirmed by XRD.
publishDate 2008
dc.date.none.fl_str_mv 2008-06-01
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=S0366-69132008000200016
url http://old.scielo.br/scielo.php?script=sci_arttext&pid=S0366-69132008000200016
dc.language.iso.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv 10.1590/S0366-69132008000200016
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 Associação Brasileira de Cerâmica
publisher.none.fl_str_mv Associação Brasileira de Cerâmica
dc.source.none.fl_str_mv Cerâmica v.54 n.330 2008
reponame:Cerâmica (São Paulo. Online)
instname:Universidade de São Paulo (USP)
instacron:USP
instname_str Universidade de São Paulo (USP)
instacron_str USP
institution USP
reponame_str Cerâmica (São Paulo. Online)
collection Cerâmica (São Paulo. Online)
repository.name.fl_str_mv Cerâmica (São Paulo. Online) - Universidade de São Paulo (USP)
repository.mail.fl_str_mv ceram.abc@gmail.com||ceram.abc@gmail.com
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