Superficial modifications in TiO2 and Al2O3 ceramics

Detalhes bibliográficos
Autor(a) principal: Santos,Flávio de Paula
Data de Publicação: 2003
Outros Autores: Campos,Elson de, Costa,Marcelo, Melo,Francisco Cristóvão Lourenço, Honda,Roberto Yzumi, Mota,Rogério Pinto
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=S1516-14392003000300009
Resumo: The properties of hydrophilicity or hydrophobicity of materials are defined mainly, though not exclusively, by their composition, morphology and surface energy. In this work, titanium dioxide (TiO2) and aluminum oxide-alumina (Al2O3) ceramics prepared by uniaxial pressing were studied in terms of surface energy. The surfaces of these ceramics were treated with nitrogen plasma, using a stainless steel reactor excited by a 13,6 MHz radio frequency operating at 50 W input power and 13 Pa nitrogen pressure. The surface morphology was investigated by scanning electron microscopy (SEM) analysis. Surface energy and contact angle measurements were taken using a RAMÉ-HART goniometer. These measurements were taken as function of time, over a 21-day period. The contact angle and surface energy values were found to change by almost 34% in comparison to their initial values immediately following plasma treatment. Nonetheless, the hydrophilic character of the Al2O3 and TiO2 remained constant throughout the test period.
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spelling Superficial modifications in TiO2 and Al2O3 ceramicstitanium dioxidealuminasurface energycontact angleThe properties of hydrophilicity or hydrophobicity of materials are defined mainly, though not exclusively, by their composition, morphology and surface energy. In this work, titanium dioxide (TiO2) and aluminum oxide-alumina (Al2O3) ceramics prepared by uniaxial pressing were studied in terms of surface energy. The surfaces of these ceramics were treated with nitrogen plasma, using a stainless steel reactor excited by a 13,6 MHz radio frequency operating at 50 W input power and 13 Pa nitrogen pressure. The surface morphology was investigated by scanning electron microscopy (SEM) analysis. Surface energy and contact angle measurements were taken using a RAMÉ-HART goniometer. These measurements were taken as function of time, over a 21-day period. The contact angle and surface energy values were found to change by almost 34% in comparison to their initial values immediately following plasma treatment. Nonetheless, the hydrophilic character of the Al2O3 and TiO2 remained constant throughout the test period.ABM, ABC, ABPol2003-06-01info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersiontext/htmlhttp://old.scielo.br/scielo.php?script=sci_arttext&pid=S1516-14392003000300009Materials Research v.6 n.3 2003reponame:Materials research (São Carlos. Online)instname:Universidade Federal de São Carlos (UFSCAR)instacron:ABM ABC ABPOL10.1590/S1516-14392003000300009info:eu-repo/semantics/openAccessSantos,Flávio de PaulaCampos,Elson deCosta,MarceloMelo,Francisco Cristóvão LourençoHonda,Roberto YzumiMota,Rogério Pintoeng2003-11-28T00:00:00Zoai:scielo:S1516-14392003000300009Revistahttp://www.scielo.br/mrPUBhttps://old.scielo.br/oai/scielo-oai.phpdedz@power.ufscar.br1980-53731516-1439opendoar:2003-11-28T00:00Materials research (São Carlos. Online) - Universidade Federal de São Carlos (UFSCAR)false
dc.title.none.fl_str_mv Superficial modifications in TiO2 and Al2O3 ceramics
title Superficial modifications in TiO2 and Al2O3 ceramics
spellingShingle Superficial modifications in TiO2 and Al2O3 ceramics
Santos,Flávio de Paula
titanium dioxide
alumina
surface energy
contact angle
title_short Superficial modifications in TiO2 and Al2O3 ceramics
title_full Superficial modifications in TiO2 and Al2O3 ceramics
title_fullStr Superficial modifications in TiO2 and Al2O3 ceramics
title_full_unstemmed Superficial modifications in TiO2 and Al2O3 ceramics
title_sort Superficial modifications in TiO2 and Al2O3 ceramics
author Santos,Flávio de Paula
author_facet Santos,Flávio de Paula
Campos,Elson de
Costa,Marcelo
Melo,Francisco Cristóvão Lourenço
Honda,Roberto Yzumi
Mota,Rogério Pinto
author_role author
author2 Campos,Elson de
Costa,Marcelo
Melo,Francisco Cristóvão Lourenço
Honda,Roberto Yzumi
Mota,Rogério Pinto
author2_role author
author
author
author
author
dc.contributor.author.fl_str_mv Santos,Flávio de Paula
Campos,Elson de
Costa,Marcelo
Melo,Francisco Cristóvão Lourenço
Honda,Roberto Yzumi
Mota,Rogério Pinto
dc.subject.por.fl_str_mv titanium dioxide
alumina
surface energy
contact angle
topic titanium dioxide
alumina
surface energy
contact angle
description The properties of hydrophilicity or hydrophobicity of materials are defined mainly, though not exclusively, by their composition, morphology and surface energy. In this work, titanium dioxide (TiO2) and aluminum oxide-alumina (Al2O3) ceramics prepared by uniaxial pressing were studied in terms of surface energy. The surfaces of these ceramics were treated with nitrogen plasma, using a stainless steel reactor excited by a 13,6 MHz radio frequency operating at 50 W input power and 13 Pa nitrogen pressure. The surface morphology was investigated by scanning electron microscopy (SEM) analysis. Surface energy and contact angle measurements were taken using a RAMÉ-HART goniometer. These measurements were taken as function of time, over a 21-day period. The contact angle and surface energy values were found to change by almost 34% in comparison to their initial values immediately following plasma treatment. Nonetheless, the hydrophilic character of the Al2O3 and TiO2 remained constant throughout the test period.
publishDate 2003
dc.date.none.fl_str_mv 2003-06-01
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=S1516-14392003000300009
url http://old.scielo.br/scielo.php?script=sci_arttext&pid=S1516-14392003000300009
dc.language.iso.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv 10.1590/S1516-14392003000300009
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.6 n.3 2003
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_ 1754212657351622656

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