Crystal growth kinetics in cordierite and diopside glasses in wide temperature ranges
Autor(a) principal: | |
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Data de Publicação: | 2008 |
Outros Autores: | , , |
Tipo de documento: | Artigo |
Idioma: | eng |
Título da fonte: | Repositório Institucional da UFBA |
Texto Completo: | http://www.repositorio.ufba.br/ri/handle/ufba/572 |
Resumo: | We measured and collected literature data for the crystal growth rate, u(T), of -cordierite (2MgO.2Al2O3.5SiO2) and diopside (CaO.MgO.2SiO2) in their isochemical glass forming melts. The data cover exceptionally wide temperature ranges, i.e. 800 1350 C for cordierite and 750 1378 C for diopside. The maximum of u(T) is reached at about 1250 C for both systems. A smooth shoulder occurs around 970 C for -cordierite. Based on measured and collected viscosity data, we fitted u(T) using standard crystal growth models. For diopside, u(T) can be well fitted with the 2D surface nucleation as well as with the screw dislocation growth mechanism. The screw dislocation model, however, yields parameters of more significant physical meaning. For cordierite, these two models also describe the experimental growth rates. However, best fittings of u(T) including the observed shoulder, were attained for a combined mechanism, assuming that the melt/crystal interface growing from screw dislocations is additionally roughened by superimposed 2D surface nucleation at large undercoolings, starting at a temperature around the shoulder. The good fittings indicate that viscosity can be used to assess the transport mechanism that determines crystal growth in these systems, from the melting point Tm down to Tg, with no sign of a breakdown of the Stokes-Einstein / Eyring equation |
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Reinsch, StefanNascimento, Marcio Luis FerreiraMuller, RalfZanotto, Edgar DutraReinsch, StefanNascimento, Marcio Luis FerreiraMuller, RalfZanotto, Edgar Dutra2010-11-10T18:48:38Z2010-11-10T18:48:38Z2008-01-0100223093http://www.repositorio.ufba.br/ri/handle/ufba/572Journal of Non-Crystalline Solids, v. 354, p. 5386-5394We measured and collected literature data for the crystal growth rate, u(T), of -cordierite (2MgO.2Al2O3.5SiO2) and diopside (CaO.MgO.2SiO2) in their isochemical glass forming melts. The data cover exceptionally wide temperature ranges, i.e. 800 1350 C for cordierite and 750 1378 C for diopside. The maximum of u(T) is reached at about 1250 C for both systems. A smooth shoulder occurs around 970 C for -cordierite. Based on measured and collected viscosity data, we fitted u(T) using standard crystal growth models. For diopside, u(T) can be well fitted with the 2D surface nucleation as well as with the screw dislocation growth mechanism. The screw dislocation model, however, yields parameters of more significant physical meaning. For cordierite, these two models also describe the experimental growth rates. However, best fittings of u(T) including the observed shoulder, were attained for a combined mechanism, assuming that the melt/crystal interface growing from screw dislocations is additionally roughened by superimposed 2D surface nucleation at large undercoolings, starting at a temperature around the shoulder. The good fittings indicate that viscosity can be used to assess the transport mechanism that determines crystal growth in these systems, from the melting point Tm down to Tg, with no sign of a breakdown of the Stokes-Einstein / Eyring equationSubmitted by Márcio Nascimento (mlfn@ufba.br) on 2010-11-10T18:48:38Z No. of bitstreams: 1 CrystalGrowthKineticsCordieriteDiopside-JNCS354-Nascimento.pdf: 695529 bytes, checksum: 3165c77a3761189e64eb75d6f8c23636 (MD5)Made available in DSpace on 2010-11-10T18:48:38Z (GMT). No. of bitstreams: 1 CrystalGrowthKineticsCordieriteDiopside-JNCS354-Nascimento.pdf: 695529 bytes, checksum: 3165c77a3761189e64eb75d6f8c23636 (MD5) Previous issue date: 2008-01-01Estados UnidosVidCristalizaçãoCrescimento de CristaisNucleaçãoViscosidadeModeloCrystal growth kinetics in cordierite and diopside glasses in wide temperature rangesArtigo de Periódicoinfo:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionengreponame:Repositório Institucional da UFBAinstname:Universidade Federal da Bahia (UFBA)instacron:UFBAinfo:eu-repo/semantics/openAccessORIGINALCrystalGrowthKineticsCordieriteDiopside-JNCS354-Nascimento.pdfCrystalGrowthKineticsCordieriteDiopside-JNCS354-Nascimento.pdfapplication/pdf695529https://repositorio.ufba.br/bitstream/ufba/572/1/CrystalGrowthKineticsCordieriteDiopside-JNCS354-Nascimento.pdf3165c77a3761189e64eb75d6f8c23636MD51LICENSElicense.txtlicense.txttext/plain1895https://repositorio.ufba.br/bitstream/ufba/572/2/license.txtc02e03d91b2ac18ca143d05304575d9fMD52TEXTCrystalGrowthKineticsCordieriteDiopside-JNCS354-Nascimento.pdf.txtCrystalGrowthKineticsCordieriteDiopside-JNCS354-Nascimento.pdf.txtExtracted texttext/plain53418https://repositorio.ufba.br/bitstream/ufba/572/3/CrystalGrowthKineticsCordieriteDiopside-JNCS354-Nascimento.pdf.txt922a8b2f477f6f73d7a8578833856d6cMD53ufba/5722022-08-26 11:47:07.541oai:repositorio.ufba.br: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Repositório InstitucionalPUBhttp://192.188.11.11:8080/oai/requestopendoar:19322022-08-26T14:47:07Repositório Institucional da UFBA - Universidade Federal da Bahia (UFBA)false |
dc.title.en.fl_str_mv |
Crystal growth kinetics in cordierite and diopside glasses in wide temperature ranges |
title |
Crystal growth kinetics in cordierite and diopside glasses in wide temperature ranges |
spellingShingle |
Crystal growth kinetics in cordierite and diopside glasses in wide temperature ranges Reinsch, Stefan Vid Cristalização Crescimento de Cristais Nucleação Viscosidade Modelo |
title_short |
Crystal growth kinetics in cordierite and diopside glasses in wide temperature ranges |
title_full |
Crystal growth kinetics in cordierite and diopside glasses in wide temperature ranges |
title_fullStr |
Crystal growth kinetics in cordierite and diopside glasses in wide temperature ranges |
title_full_unstemmed |
Crystal growth kinetics in cordierite and diopside glasses in wide temperature ranges |
title_sort |
Crystal growth kinetics in cordierite and diopside glasses in wide temperature ranges |
author |
Reinsch, Stefan |
author_facet |
Reinsch, Stefan Nascimento, Marcio Luis Ferreira Muller, Ralf Zanotto, Edgar Dutra |
author_role |
author |
author2 |
Nascimento, Marcio Luis Ferreira Muller, Ralf Zanotto, Edgar Dutra |
author2_role |
author author author |
dc.contributor.author.fl_str_mv |
Reinsch, Stefan Nascimento, Marcio Luis Ferreira Muller, Ralf Zanotto, Edgar Dutra Reinsch, Stefan Nascimento, Marcio Luis Ferreira Muller, Ralf Zanotto, Edgar Dutra |
dc.subject.eng.fl_str_mv |
Vid Cristalização Crescimento de Cristais Nucleação Viscosidade Modelo |
topic |
Vid Cristalização Crescimento de Cristais Nucleação Viscosidade Modelo |
description |
We measured and collected literature data for the crystal growth rate, u(T), of -cordierite (2MgO.2Al2O3.5SiO2) and diopside (CaO.MgO.2SiO2) in their isochemical glass forming melts. The data cover exceptionally wide temperature ranges, i.e. 800 1350 C for cordierite and 750 1378 C for diopside. The maximum of u(T) is reached at about 1250 C for both systems. A smooth shoulder occurs around 970 C for -cordierite. Based on measured and collected viscosity data, we fitted u(T) using standard crystal growth models. For diopside, u(T) can be well fitted with the 2D surface nucleation as well as with the screw dislocation growth mechanism. The screw dislocation model, however, yields parameters of more significant physical meaning. For cordierite, these two models also describe the experimental growth rates. However, best fittings of u(T) including the observed shoulder, were attained for a combined mechanism, assuming that the melt/crystal interface growing from screw dislocations is additionally roughened by superimposed 2D surface nucleation at large undercoolings, starting at a temperature around the shoulder. The good fittings indicate that viscosity can be used to assess the transport mechanism that determines crystal growth in these systems, from the melting point Tm down to Tg, with no sign of a breakdown of the Stokes-Einstein / Eyring equation |
publishDate |
2008 |
dc.date.issued.fl_str_mv |
2008-01-01 |
dc.date.accessioned.fl_str_mv |
2010-11-10T18:48:38Z |
dc.date.available.fl_str_mv |
2010-11-10T18:48:38Z |
dc.type.driver.fl_str_mv |
Artigo de Periódico 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://www.repositorio.ufba.br/ri/handle/ufba/572 |
dc.identifier.issn.none.fl_str_mv |
00223093 |
dc.identifier.number.en.fl_str_mv |
Journal of Non-Crystalline Solids, v. 354, p. 5386-5394 |
identifier_str_mv |
00223093 Journal of Non-Crystalline Solids, v. 354, p. 5386-5394 |
url |
http://www.repositorio.ufba.br/ri/handle/ufba/572 |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.rights.driver.fl_str_mv |
info:eu-repo/semantics/openAccess |
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openAccess |
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Universidade Federal da Bahia (UFBA) |
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UFBA |
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UFBA |
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Repositório Institucional da UFBA |
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