Thermal conductivity of polycrystalline aluminum nitride (AlN) ceramics

Detalhes bibliográficos
Autor(a) principal: Franco Júnior,A.
Data de Publicação: 2004
Outros Autores: Shanafield,D. J
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=S0366-69132004000300012
Resumo: In general, polycrystalline ceramics exhibit lower thermal conductivities than their associated single crystals. For instance, at 300K, the theoretical thermal conductivity of single crystal aluminum nitride (AlN) is 319 W/m-K, whereas, the values measured for polycrystalline AlN ceramics range from 17 W/m-K to 285 W/m-K. This variation is not unusual for polycrystalline ceramics. The variability is strongly dependent upon the purity of the starting materials and the details of sintering process. The process is important since it influences the microstructure and thus influences the conduction mechanism. In this paper we present the causes of this variation and how it can be controlled.
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spelling Thermal conductivity of polycrystalline aluminum nitride (AlN) ceramicsAluminum nitridethermal conductivitythermal conduction mechanismIn general, polycrystalline ceramics exhibit lower thermal conductivities than their associated single crystals. For instance, at 300K, the theoretical thermal conductivity of single crystal aluminum nitride (AlN) is 319 W/m-K, whereas, the values measured for polycrystalline AlN ceramics range from 17 W/m-K to 285 W/m-K. This variation is not unusual for polycrystalline ceramics. The variability is strongly dependent upon the purity of the starting materials and the details of sintering process. The process is important since it influences the microstructure and thus influences the conduction mechanism. In this paper we present the causes of this variation and how it can be controlled.Associação Brasileira de Cerâmica2004-09-01info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersiontext/htmlhttp://old.scielo.br/scielo.php?script=sci_arttext&pid=S0366-69132004000300012Cerâmica v.50 n.315 2004reponame:Cerâmica (São Paulo. Online)instname:Universidade de São Paulo (USP)instacron:USP10.1590/S0366-69132004000300012info:eu-repo/semantics/openAccessFranco Júnior,A.Shanafield,D. Jeng2004-11-10T00:00:00Zoai:scielo:S0366-69132004000300012Revistahttps://www.scielo.br/j/ce/PUBhttps://old.scielo.br/oai/scielo-oai.phpceram.abc@gmail.com||ceram.abc@gmail.com1678-45530366-6913opendoar:2004-11-10T00:00Cerâmica (São Paulo. Online) - Universidade de São Paulo (USP)false
dc.title.none.fl_str_mv Thermal conductivity of polycrystalline aluminum nitride (AlN) ceramics
title Thermal conductivity of polycrystalline aluminum nitride (AlN) ceramics
spellingShingle Thermal conductivity of polycrystalline aluminum nitride (AlN) ceramics
Franco Júnior,A.
Aluminum nitride
thermal conductivity
thermal conduction mechanism
title_short Thermal conductivity of polycrystalline aluminum nitride (AlN) ceramics
title_full Thermal conductivity of polycrystalline aluminum nitride (AlN) ceramics
title_fullStr Thermal conductivity of polycrystalline aluminum nitride (AlN) ceramics
title_full_unstemmed Thermal conductivity of polycrystalline aluminum nitride (AlN) ceramics
title_sort Thermal conductivity of polycrystalline aluminum nitride (AlN) ceramics
author Franco Júnior,A.
author_facet Franco Júnior,A.
Shanafield,D. J
author_role author
author2 Shanafield,D. J
author2_role author
dc.contributor.author.fl_str_mv Franco Júnior,A.
Shanafield,D. J
dc.subject.por.fl_str_mv Aluminum nitride
thermal conductivity
thermal conduction mechanism
topic Aluminum nitride
thermal conductivity
thermal conduction mechanism
description In general, polycrystalline ceramics exhibit lower thermal conductivities than their associated single crystals. For instance, at 300K, the theoretical thermal conductivity of single crystal aluminum nitride (AlN) is 319 W/m-K, whereas, the values measured for polycrystalline AlN ceramics range from 17 W/m-K to 285 W/m-K. This variation is not unusual for polycrystalline ceramics. The variability is strongly dependent upon the purity of the starting materials and the details of sintering process. The process is important since it influences the microstructure and thus influences the conduction mechanism. In this paper we present the causes of this variation and how it can be controlled.
publishDate 2004
dc.date.none.fl_str_mv 2004-09-01
dc.type.driver.fl_str_mv info:eu-repo/semantics/article
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dc.identifier.uri.fl_str_mv http://old.scielo.br/scielo.php?script=sci_arttext&pid=S0366-69132004000300012
url http://old.scielo.br/scielo.php?script=sci_arttext&pid=S0366-69132004000300012
dc.language.iso.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv 10.1590/S0366-69132004000300012
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.50 n.315 2004
reponame:Cerâmica (São Paulo. Online)
instname:Universidade de São Paulo (USP)
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instname_str Universidade de São Paulo (USP)
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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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