Superficial modifications in TiO2 and Al2O3 ceramics
Autor(a) principal: | |
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Data de Publicação: | 2003 |
Outros Autores: | , , , , |
Tipo de documento: | Artigo |
Idioma: | eng |
Título da fonte: | Repositório Institucional da UNESP |
Texto Completo: | http://dx.doi.org/10.1590/S1516-14392003000300009 http://hdl.handle.net/11449/212950 |
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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Repositório Institucional da UNESP |
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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.Centro Técnico AeroespacialUniversidade Estadual Paulista, Department of Materials and TechnologyUniversidade Estadual Paulista, Department of Physics & ChemistryUniversidade Estadual Paulista, Department of Materials and TechnologyUniversidade Estadual Paulista, Department of Physics & ChemistryABM, ABC, ABPolCentro Técnico AeroespacialUniversidade Estadual Paulista (Unesp)Santos, Flávio De Paula [UNESP]Campos, Elson De [UNESP]Costa, Marcelo [UNESP]Melo, Francisco Cristóvão LourençoHonda, Roberto Yzumi [UNESP]Mota, Rogério Pinto [UNESP]2021-07-14T10:47:36Z2021-07-14T10:47:36Z2003-06info:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/article353-357application/pdfhttp://dx.doi.org/10.1590/S1516-14392003000300009Materials Research. São Carlos, SP, Brazil: ABM, ABC, ABPol, v. 6, n. 3, p. 353-357, 2003.1516-14391980-5373http://hdl.handle.net/11449/21295010.1590/S1516-14392003000300009S1516-14392003000300009S1516-14392003000300009.pdfSciELOreponame:Repositório Institucional da UNESPinstname:Universidade Estadual Paulista (UNESP)instacron:UNESPengMaterials Researchinfo:eu-repo/semantics/openAccess2024-07-01T20:52:17Zoai:repositorio.unesp.br:11449/212950Repositório InstitucionalPUBhttp://repositorio.unesp.br/oai/requestopendoar:29462024-08-05T17:45:24.883716Repositório Institucional da UNESP - Universidade Estadual Paulista (UNESP)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 [UNESP] 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 [UNESP] |
author_facet |
Santos, Flávio De Paula [UNESP] Campos, Elson De [UNESP] Costa, Marcelo [UNESP] Melo, Francisco Cristóvão Lourenço Honda, Roberto Yzumi [UNESP] Mota, Rogério Pinto [UNESP] |
author_role |
author |
author2 |
Campos, Elson De [UNESP] Costa, Marcelo [UNESP] Melo, Francisco Cristóvão Lourenço Honda, Roberto Yzumi [UNESP] Mota, Rogério Pinto [UNESP] |
author2_role |
author author author author author |
dc.contributor.none.fl_str_mv |
Centro Técnico Aeroespacial Universidade Estadual Paulista (Unesp) |
dc.contributor.author.fl_str_mv |
Santos, Flávio De Paula [UNESP] Campos, Elson De [UNESP] Costa, Marcelo [UNESP] Melo, Francisco Cristóvão Lourenço Honda, Roberto Yzumi [UNESP] Mota, Rogério Pinto [UNESP] |
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 2021-07-14T10:47:36Z 2021-07-14T10:47:36Z |
dc.type.status.fl_str_mv |
info:eu-repo/semantics/publishedVersion |
dc.type.driver.fl_str_mv |
info:eu-repo/semantics/article |
format |
article |
status_str |
publishedVersion |
dc.identifier.uri.fl_str_mv |
http://dx.doi.org/10.1590/S1516-14392003000300009 Materials Research. São Carlos, SP, Brazil: ABM, ABC, ABPol, v. 6, n. 3, p. 353-357, 2003. 1516-1439 1980-5373 http://hdl.handle.net/11449/212950 10.1590/S1516-14392003000300009 S1516-14392003000300009 S1516-14392003000300009.pdf |
url |
http://dx.doi.org/10.1590/S1516-14392003000300009 http://hdl.handle.net/11449/212950 |
identifier_str_mv |
Materials Research. São Carlos, SP, Brazil: ABM, ABC, ABPol, v. 6, n. 3, p. 353-357, 2003. 1516-1439 1980-5373 10.1590/S1516-14392003000300009 S1516-14392003000300009 S1516-14392003000300009.pdf |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.relation.none.fl_str_mv |
Materials Research |
dc.rights.driver.fl_str_mv |
info:eu-repo/semantics/openAccess |
eu_rights_str_mv |
openAccess |
dc.format.none.fl_str_mv |
353-357 application/pdf |
dc.publisher.none.fl_str_mv |
ABM, ABC, ABPol |
publisher.none.fl_str_mv |
ABM, ABC, ABPol |
dc.source.none.fl_str_mv |
SciELO reponame:Repositório Institucional da UNESP instname:Universidade Estadual Paulista (UNESP) instacron:UNESP |
instname_str |
Universidade Estadual Paulista (UNESP) |
instacron_str |
UNESP |
institution |
UNESP |
reponame_str |
Repositório Institucional da UNESP |
collection |
Repositório Institucional da UNESP |
repository.name.fl_str_mv |
Repositório Institucional da UNESP - Universidade Estadual Paulista (UNESP) |
repository.mail.fl_str_mv |
|
_version_ |
1808128854030548992 |