Thermal conductivity of polycrystalline aluminum nitride (AlN) ceramics
Autor(a) principal: | |
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Data de Publicação: | 2004 |
Outros Autores: | |
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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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 |
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=S0366-69132004000300012 |
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) 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 |
_version_ |
1748936780214697984 |