Characterization of Si3N4 powders in aqueous dispersions

Detalhes bibliográficos
Autor(a) principal: Castanho,S. Mello
Data de Publicação: 1998
Outros Autores: Moreno,R.
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=S0366-69131998000400006
Resumo: alpha- Si3N4 can easily oxidize when exposed in air atmosphere or other oxidizing environment. The chemistry of Si3N4 particle surfaces can change by different synthesis routes and also by subsequent processing steps. To avoid this oxidation is a challenge when Si3N4 powder is shaped by slip casting process from aqueous suspension. This study shows the variations on Si3N4 powder surface after slip casting process using x-ray photoelectron spectroscopy (XPS) and high resolution transmission electron microscopy (HTEM) on the green compacts. The results show that the dispersant used during the preparation of the slurry can reduce the level of oxidation of the Si3N4 particles when processing in aqueous solutions.
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spelling Characterization of Si3N4 powders in aqueous dispersionsalpha- Si3N4 can easily oxidize when exposed in air atmosphere or other oxidizing environment. The chemistry of Si3N4 particle surfaces can change by different synthesis routes and also by subsequent processing steps. To avoid this oxidation is a challenge when Si3N4 powder is shaped by slip casting process from aqueous suspension. This study shows the variations on Si3N4 powder surface after slip casting process using x-ray photoelectron spectroscopy (XPS) and high resolution transmission electron microscopy (HTEM) on the green compacts. The results show that the dispersant used during the preparation of the slurry can reduce the level of oxidation of the Si3N4 particles when processing in aqueous solutions.Associação Brasileira de Cerâmica1998-08-01info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersiontext/htmlhttp://old.scielo.br/scielo.php?script=sci_arttext&pid=S0366-69131998000400006Cerâmica v.44 n.287-288 1998reponame:Cerâmica (São Paulo. Online)instname:Universidade de São Paulo (USP)instacron:USP10.1590/S0366-69131998000400006info:eu-repo/semantics/openAccessCastanho,S. MelloMoreno,R.eng2001-06-21T00:00:00Zoai:scielo:S0366-69131998000400006Revistahttps://www.scielo.br/j/ce/PUBhttps://old.scielo.br/oai/scielo-oai.phpceram.abc@gmail.com||ceram.abc@gmail.com1678-45530366-6913opendoar:2001-06-21T00:00Cerâmica (São Paulo. Online) - Universidade de São Paulo (USP)false
dc.title.none.fl_str_mv Characterization of Si3N4 powders in aqueous dispersions
title Characterization of Si3N4 powders in aqueous dispersions
spellingShingle Characterization of Si3N4 powders in aqueous dispersions
Castanho,S. Mello
title_short Characterization of Si3N4 powders in aqueous dispersions
title_full Characterization of Si3N4 powders in aqueous dispersions
title_fullStr Characterization of Si3N4 powders in aqueous dispersions
title_full_unstemmed Characterization of Si3N4 powders in aqueous dispersions
title_sort Characterization of Si3N4 powders in aqueous dispersions
author Castanho,S. Mello
author_facet Castanho,S. Mello
Moreno,R.
author_role author
author2 Moreno,R.
author2_role author
dc.contributor.author.fl_str_mv Castanho,S. Mello
Moreno,R.
description alpha- Si3N4 can easily oxidize when exposed in air atmosphere or other oxidizing environment. The chemistry of Si3N4 particle surfaces can change by different synthesis routes and also by subsequent processing steps. To avoid this oxidation is a challenge when Si3N4 powder is shaped by slip casting process from aqueous suspension. This study shows the variations on Si3N4 powder surface after slip casting process using x-ray photoelectron spectroscopy (XPS) and high resolution transmission electron microscopy (HTEM) on the green compacts. The results show that the dispersant used during the preparation of the slurry can reduce the level of oxidation of the Si3N4 particles when processing in aqueous solutions.
publishDate 1998
dc.date.none.fl_str_mv 1998-08-01
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=S0366-69131998000400006
url http://old.scielo.br/scielo.php?script=sci_arttext&pid=S0366-69131998000400006
dc.language.iso.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv 10.1590/S0366-69131998000400006
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.44 n.287-288 1998
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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