LZS/Al2O3 Glass-Ceramic Composites Sintered by Fast Firing

Detalhes bibliográficos
Autor(a) principal: Arcaro,Sabrina
Data de Publicação: 2017
Outros Autores: Isabel Nieto,Maria, Moreno,Rodrigo, Salvador,Maria Dolores, Borrell,Amparo, Moreno,Berta, Chinarro,Eva, Oliveira,Antonio Pedro Novaes de
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=S1516-14392017000800084
Resumo: In this work, nanometric Al2O3 (1-5 vol.%) particles (13 nm, 100 m2/g) were added to a 19.58Li2O•11.10ZrO2•69.32SiO2 (mol%) (3.5 µm, 2.5 m2/g) parent glass-ceramic matrix to prepare composites with the purpose of studying the influence of Al2O3 on their structure, microstructure, mechanical, thermal and electrical properties when sintered by fast firing. The parent glass-ceramic was prepared by melting and fast cooling (in water) to obtain a glass frit. The resulting glass frit was milled according to a two-step procedure consisting on a dry milling stage followed by a long wet milling step down. Each composition was wet homogenized and then dried at 110 ºC for 48 h for disaggregation. The obtained powders were uniaxially pressed (100 MPa) and compacts sintered by fast firing (175 ºC/min) between 800 and 900 ºC for 30 min. The composites, with relative densities ranging from 89% to 93%, showed zircon and β-spodumene as main crystalline phases. The hardness and Young's modulus varied from 4.5 to 6.5 GPa, and from 65 to 102 GPa, respectively. The formation of β-spodumene in the obtained composites leads to reduce the CTEs, whose values ranged from 13 to 7 x 10-6 ºC-1.
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spelling LZS/Al2O3 Glass-Ceramic Composites Sintered by Fast FiringAlumina nanoparticlesFast firing sinteringCrystallizationGlass-ceramicsIn this work, nanometric Al2O3 (1-5 vol.%) particles (13 nm, 100 m2/g) were added to a 19.58Li2O•11.10ZrO2•69.32SiO2 (mol%) (3.5 µm, 2.5 m2/g) parent glass-ceramic matrix to prepare composites with the purpose of studying the influence of Al2O3 on their structure, microstructure, mechanical, thermal and electrical properties when sintered by fast firing. The parent glass-ceramic was prepared by melting and fast cooling (in water) to obtain a glass frit. The resulting glass frit was milled according to a two-step procedure consisting on a dry milling stage followed by a long wet milling step down. Each composition was wet homogenized and then dried at 110 ºC for 48 h for disaggregation. The obtained powders were uniaxially pressed (100 MPa) and compacts sintered by fast firing (175 ºC/min) between 800 and 900 ºC for 30 min. The composites, with relative densities ranging from 89% to 93%, showed zircon and β-spodumene as main crystalline phases. The hardness and Young's modulus varied from 4.5 to 6.5 GPa, and from 65 to 102 GPa, respectively. The formation of β-spodumene in the obtained composites leads to reduce the CTEs, whose values ranged from 13 to 7 x 10-6 ºC-1.ABM, ABC, ABPol2017-01-01info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersiontext/htmlhttp://old.scielo.br/scielo.php?script=sci_arttext&pid=S1516-14392017000800084Materials Research v.20 suppl.2 2017reponame:Materials research (São Carlos. Online)instname:Universidade Federal de São Carlos (UFSCAR)instacron:ABM ABC ABPOL10.1590/1980-5373-mr-2016-0813info:eu-repo/semantics/openAccessArcaro,SabrinaIsabel Nieto,MariaMoreno,RodrigoSalvador,Maria DoloresBorrell,AmparoMoreno,BertaChinarro,EvaOliveira,Antonio Pedro Novaes deeng2018-04-12T00:00:00Zoai:scielo:S1516-14392017000800084Revistahttp://www.scielo.br/mrPUBhttps://old.scielo.br/oai/scielo-oai.phpdedz@power.ufscar.br1980-53731516-1439opendoar:2018-04-12T00:00Materials research (São Carlos. Online) - Universidade Federal de São Carlos (UFSCAR)false
dc.title.none.fl_str_mv LZS/Al2O3 Glass-Ceramic Composites Sintered by Fast Firing
title LZS/Al2O3 Glass-Ceramic Composites Sintered by Fast Firing
spellingShingle LZS/Al2O3 Glass-Ceramic Composites Sintered by Fast Firing
Arcaro,Sabrina
Alumina nanoparticles
Fast firing sintering
Crystallization
Glass-ceramics
title_short LZS/Al2O3 Glass-Ceramic Composites Sintered by Fast Firing
title_full LZS/Al2O3 Glass-Ceramic Composites Sintered by Fast Firing
title_fullStr LZS/Al2O3 Glass-Ceramic Composites Sintered by Fast Firing
title_full_unstemmed LZS/Al2O3 Glass-Ceramic Composites Sintered by Fast Firing
title_sort LZS/Al2O3 Glass-Ceramic Composites Sintered by Fast Firing
author Arcaro,Sabrina
author_facet Arcaro,Sabrina
Isabel Nieto,Maria
Moreno,Rodrigo
Salvador,Maria Dolores
Borrell,Amparo
Moreno,Berta
Chinarro,Eva
Oliveira,Antonio Pedro Novaes de
author_role author
author2 Isabel Nieto,Maria
Moreno,Rodrigo
Salvador,Maria Dolores
Borrell,Amparo
Moreno,Berta
Chinarro,Eva
Oliveira,Antonio Pedro Novaes de
author2_role author
author
author
author
author
author
author
dc.contributor.author.fl_str_mv Arcaro,Sabrina
Isabel Nieto,Maria
Moreno,Rodrigo
Salvador,Maria Dolores
Borrell,Amparo
Moreno,Berta
Chinarro,Eva
Oliveira,Antonio Pedro Novaes de
dc.subject.por.fl_str_mv Alumina nanoparticles
Fast firing sintering
Crystallization
Glass-ceramics
topic Alumina nanoparticles
Fast firing sintering
Crystallization
Glass-ceramics
description In this work, nanometric Al2O3 (1-5 vol.%) particles (13 nm, 100 m2/g) were added to a 19.58Li2O•11.10ZrO2•69.32SiO2 (mol%) (3.5 µm, 2.5 m2/g) parent glass-ceramic matrix to prepare composites with the purpose of studying the influence of Al2O3 on their structure, microstructure, mechanical, thermal and electrical properties when sintered by fast firing. The parent glass-ceramic was prepared by melting and fast cooling (in water) to obtain a glass frit. The resulting glass frit was milled according to a two-step procedure consisting on a dry milling stage followed by a long wet milling step down. Each composition was wet homogenized and then dried at 110 ºC for 48 h for disaggregation. The obtained powders were uniaxially pressed (100 MPa) and compacts sintered by fast firing (175 ºC/min) between 800 and 900 ºC for 30 min. The composites, with relative densities ranging from 89% to 93%, showed zircon and β-spodumene as main crystalline phases. The hardness and Young's modulus varied from 4.5 to 6.5 GPa, and from 65 to 102 GPa, respectively. The formation of β-spodumene in the obtained composites leads to reduce the CTEs, whose values ranged from 13 to 7 x 10-6 ºC-1.
publishDate 2017
dc.date.none.fl_str_mv 2017-01-01
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=S1516-14392017000800084
url http://old.scielo.br/scielo.php?script=sci_arttext&pid=S1516-14392017000800084
dc.language.iso.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv 10.1590/1980-5373-mr-2016-0813
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.20 suppl.2 2017
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
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