Phase transitions and their effects on the thermal diffusivity behaviour of some SiO2 polymorphs

Detalhes bibliográficos
Autor(a) principal: Baldo,J. B.
Data de Publicação: 2002
Outros Autores: Santos,W. N. dos
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=S0366-69132002000300011
Resumo: Thermal diffusivity is a material physical property important in all problems involving non-steady state heat transfer calculations, being a decisive parameter in the response of materials subjected to thermal shock. In this work it is presented a fundamental study related to how the phase transitions may influence the thermal diffusivity behaviour as a function of temperature in the phase transforming SiO2. The experimental technique employed was the flash thermal diffusivity technique, and measurements were carried out from 100 ºC up to approximately 1200 ºC. It was found a strong dependence on the thermal diffusivity with the high and low temperature forms of the quartz and cristobalite phases.
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spelling Phase transitions and their effects on the thermal diffusivity behaviour of some SiO2 polymorphssinteringdefectsthermal expansionthermal propertiesclaysrefractoriesThermal diffusivity is a material physical property important in all problems involving non-steady state heat transfer calculations, being a decisive parameter in the response of materials subjected to thermal shock. In this work it is presented a fundamental study related to how the phase transitions may influence the thermal diffusivity behaviour as a function of temperature in the phase transforming SiO2. The experimental technique employed was the flash thermal diffusivity technique, and measurements were carried out from 100 ºC up to approximately 1200 ºC. It was found a strong dependence on the thermal diffusivity with the high and low temperature forms of the quartz and cristobalite phases.Associação Brasileira de Cerâmica2002-09-01info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersiontext/htmlhttp://old.scielo.br/scielo.php?script=sci_arttext&pid=S0366-69132002000300011Cerâmica v.48 n.307 2002reponame:Cerâmica (São Paulo. Online)instname:Universidade de São Paulo (USP)instacron:USP10.1590/S0366-69132002000300011info:eu-repo/semantics/openAccessBaldo,J. B.Santos,W. N. doseng2003-01-31T00:00:00Zoai:scielo:S0366-69132002000300011Revistahttps://www.scielo.br/j/ce/PUBhttps://old.scielo.br/oai/scielo-oai.phpceram.abc@gmail.com||ceram.abc@gmail.com1678-45530366-6913opendoar:2003-01-31T00:00Cerâmica (São Paulo. Online) - Universidade de São Paulo (USP)false
dc.title.none.fl_str_mv Phase transitions and their effects on the thermal diffusivity behaviour of some SiO2 polymorphs
title Phase transitions and their effects on the thermal diffusivity behaviour of some SiO2 polymorphs
spellingShingle Phase transitions and their effects on the thermal diffusivity behaviour of some SiO2 polymorphs
Baldo,J. B.
sintering
defects
thermal expansion
thermal properties
clays
refractories
title_short Phase transitions and their effects on the thermal diffusivity behaviour of some SiO2 polymorphs
title_full Phase transitions and their effects on the thermal diffusivity behaviour of some SiO2 polymorphs
title_fullStr Phase transitions and their effects on the thermal diffusivity behaviour of some SiO2 polymorphs
title_full_unstemmed Phase transitions and their effects on the thermal diffusivity behaviour of some SiO2 polymorphs
title_sort Phase transitions and their effects on the thermal diffusivity behaviour of some SiO2 polymorphs
author Baldo,J. B.
author_facet Baldo,J. B.
Santos,W. N. dos
author_role author
author2 Santos,W. N. dos
author2_role author
dc.contributor.author.fl_str_mv Baldo,J. B.
Santos,W. N. dos
dc.subject.por.fl_str_mv sintering
defects
thermal expansion
thermal properties
clays
refractories
topic sintering
defects
thermal expansion
thermal properties
clays
refractories
description Thermal diffusivity is a material physical property important in all problems involving non-steady state heat transfer calculations, being a decisive parameter in the response of materials subjected to thermal shock. In this work it is presented a fundamental study related to how the phase transitions may influence the thermal diffusivity behaviour as a function of temperature in the phase transforming SiO2. The experimental technique employed was the flash thermal diffusivity technique, and measurements were carried out from 100 ºC up to approximately 1200 ºC. It was found a strong dependence on the thermal diffusivity with the high and low temperature forms of the quartz and cristobalite phases.
publishDate 2002
dc.date.none.fl_str_mv 2002-09-01
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=S0366-69132002000300011
url http://old.scielo.br/scielo.php?script=sci_arttext&pid=S0366-69132002000300011
dc.language.iso.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv 10.1590/S0366-69132002000300011
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.48 n.307 2002
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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