Estudo de massas de porcelanato esmaltado contendo filito como fundente

Detalhes bibliográficos
Autor(a) principal: Brasileiro, Camila Tavares
Data de Publicação: 2020
Tipo de documento: Tese
Idioma: por
Título da fonte: Repositório Institucional da UFSCAR
Texto Completo: https://repositorio.ufscar.br/handle/ufscar/14032
Resumo: The production of ceramic tiles is growing worldwide and Brazil is the third-largest producer in the world. Porcelain tiles represent a significant fraction of this production and the trend is for significant growth in the market for this type of product in the coming decades. This scenario is marked by the increasing demand for raw materials. However, the progressive depletion of the main deposits of feldspar leads the ceramic industry to look for substitutes for this flux. A considerable part of the Brazilian industry, for several reasons, has already replaced feldspar, traditionally used as a fluxing agent, with phyllite, consisting basically of quartz, kaolinite, and sericite. Brazil is the only country that uses phyllite in the glazed porcelain masses. This gives the Brazilian industry an important competitive advantage in this segment. However, as other producers use feldspar, there are practically no studies on the effects of replacing feldspar with sericite in glazed porcelain tiles compositions. Initial studies showed very significant differences in the behavior of glazed porcelain masses containing the same content of feldspar and phyllite during firing. Based on this, the objective of this thesis was to identify how the mineral through which the fluxing ions are introduced into the porcelain composition affects its behavior during firing. In an unprecedented way, this work formulates a feldspar composition with the same flux content as the phyllite (synthetic phyllite with feldspar) with the same chemical composition and assesses its implications. The search for explanations for the observed differences was based mainly on the volume and characteristics of the liquid phase developed at high temperatures. The results showed that 1) the liquid phases produced by the fusion of sericite and feldspar play a central role in explaining the differences in behavior during heating, 2) the origin of the differences is mainly in the transformations that occur between 950 and 1150 ºC, e) differences at relatively low temperatures are also explained by the effect of granulometry.
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spelling Brasileiro, Camila TavaresBoschi, Anselmo Ortegahttp://lattes.cnpq.br/3259846931278607Dondi, Michelehttp://lattes.cnpq.br/4617859135105539http://lattes.cnpq.br/9731753452170666e1f9fdab-f8a2-4dbf-8d00-a0947fd57b9a2021-03-26T12:57:07Z2021-03-26T12:57:07Z2020-12-17BRASILEIRO, Camila Tavares. Estudo de massas de porcelanato esmaltado contendo filito como fundente. 2020. Tese (Doutorado em Ciência e Engenharia de Materiais) – Universidade Federal de São Carlos, São Carlos, 2020. Disponível em: https://repositorio.ufscar.br/handle/ufscar/14032.https://repositorio.ufscar.br/handle/ufscar/14032The production of ceramic tiles is growing worldwide and Brazil is the third-largest producer in the world. Porcelain tiles represent a significant fraction of this production and the trend is for significant growth in the market for this type of product in the coming decades. This scenario is marked by the increasing demand for raw materials. However, the progressive depletion of the main deposits of feldspar leads the ceramic industry to look for substitutes for this flux. A considerable part of the Brazilian industry, for several reasons, has already replaced feldspar, traditionally used as a fluxing agent, with phyllite, consisting basically of quartz, kaolinite, and sericite. Brazil is the only country that uses phyllite in the glazed porcelain masses. This gives the Brazilian industry an important competitive advantage in this segment. However, as other producers use feldspar, there are practically no studies on the effects of replacing feldspar with sericite in glazed porcelain tiles compositions. Initial studies showed very significant differences in the behavior of glazed porcelain masses containing the same content of feldspar and phyllite during firing. Based on this, the objective of this thesis was to identify how the mineral through which the fluxing ions are introduced into the porcelain composition affects its behavior during firing. In an unprecedented way, this work formulates a feldspar composition with the same flux content as the phyllite (synthetic phyllite with feldspar) with the same chemical composition and assesses its implications. The search for explanations for the observed differences was based mainly on the volume and characteristics of the liquid phase developed at high temperatures. The results showed that 1) the liquid phases produced by the fusion of sericite and feldspar play a central role in explaining the differences in behavior during heating, 2) the origin of the differences is mainly in the transformations that occur between 950 and 1150 ºC, e) differences at relatively low temperatures are also explained by the effect of granulometry.A produção de revestimentos cerâmicos é crescente no mundo, sendo o Brasil o terceiro maior produtor mundial. Os porcelanatos representam uma fração significativa dessa produção, havendo uma tendência de crescimento expressivo de seu mercado nas próximas décadas. Esse cenário é marcado por uma crescente demanda por matérias-primas, porém, o esgotamento progressivo dos principais depósitos de feldspato leva a indústria cerâmica a procurar substitutos para esse fundente. Considerável parte da indústria brasileira já substitui, por vários motivos, o tradicional fundente feldspato por filito, constituído basicamente de quartzo, caulinita e sericita. Isso dá à indústria brasileira, a única a utilizar filito nas massas de porcelanato esmaltado, uma importante vantagem competitiva nesse segmento. Entretanto, como os demais produtores utilizam feldspato, praticamente não existem estudos sobre os efeitos da substituição do feldspato pela sericita em massas de porcelanato esmaltado. Estudos anteriores mostraram diferenças significativas no comportamento das massas de porcelanato esmaltado contendo o mesmo teor de feldspato e filito durante a queima. Assim, avaliou-se nesta tese o efeito da substituição entre eles, contendo o mesmo teor de minerais fundentes. Para tanto, formulou-se uma inédita massa feldspática com o mesmo teor de fundente que o filito e com a mesma composição química e avaliaram-se as implicações disso. A busca de explicações para as diferenças observadas foi baseada principalmente no volume e características da fase líquida desenvolvida a temperaturas elevadas. Os principais resultados mostraram que 1) as fases líquidas produzidas pela fusão da sericita e do feldspato desempenham papel central para explicar as diferenças de comportamento durante o aquecimento, 2) a origem das diferenças está principalmente na temperatura de início de formação da fase líquida, que na massa com filito é cerca de 230ºC menor do que na massa feldspática, e 3) as diferenças nas temperaturas relativamente baixas também podem ser explicadas pela granulometria.Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)CNPq: 142554/2018-9porUniversidade Federal de São CarlosCâmpus São CarlosPrograma de Pós-Graduação em Ciência e Engenharia de Materiais - PPGCEMUFSCarAttribution-NonCommercial-NoDerivs 3.0 Brazilhttp://creativecommons.org/licenses/by-nc-nd/3.0/br/info:eu-repo/semantics/openAccessPorcelanatoMinerais fundentesSericitaFluxo viscosoGresificaçãoPorcelain tileFluxing mineralsSericiteViscous flowVitrificationENGENHARIAS::ENGENHARIA DE MATERIAIS E METALURGICA::MATERIAIS NAO METALICOSEstudo de massas de porcelanato esmaltado contendo filito como fundenteStudy of glazed porcelain tiles bodies containing phyllite as fluxinfo:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/doctoralThesis600600def1d9c8-353a-4dec-a3b5-c49b68749aedreponame:Repositório Institucional da UFSCARinstname:Universidade Federal de São Carlos (UFSCAR)instacron:UFSCARORIGINALCamila Tavares Brasileiro - Tese.pdfCamila Tavares Brasileiro - Tese.pdfTese versão final - Camila Tavares Brasileiroapplication/pdf3175895https://repositorio.ufscar.br/bitstream/ufscar/14032/1/Camila%20Tavares%20Brasileiro%20-%20Tese.pdf3c619b2312d8604ed9b2c29cc5e5e5daMD51BCO carta comprovante autoarquivamento .pdfBCO carta comprovante autoarquivamento .pdfCarta comprovante BCOapplication/pdf1101496https://repositorio.ufscar.br/bitstream/ufscar/14032/2/BCO%20carta%20comprovante%20autoarquivamento%20.pdf9c3b4c4469cd725c8d1067ed3363ee0fMD52CC-LICENSElicense_rdflicense_rdfapplication/rdf+xml; charset=utf-8811https://repositorio.ufscar.br/bitstream/ufscar/14032/3/license_rdfe39d27027a6cc9cb039ad269a5db8e34MD53TEXTCamila Tavares Brasileiro - Tese.pdf.txtCamila Tavares Brasileiro - Tese.pdf.txtExtracted texttext/plain184840https://repositorio.ufscar.br/bitstream/ufscar/14032/4/Camila%20Tavares%20Brasileiro%20-%20Tese.pdf.txt5c46676d3fcaf51e71b276d647eb4cd5MD54BCO carta comprovante autoarquivamento .pdf.txtBCO carta comprovante autoarquivamento .pdf.txtExtracted texttext/plain1https://repositorio.ufscar.br/bitstream/ufscar/14032/6/BCO%20carta%20comprovante%20autoarquivamento%20.pdf.txt68b329da9893e34099c7d8ad5cb9c940MD56THUMBNAILCamila Tavares Brasileiro - Tese.pdf.jpgCamila Tavares Brasileiro - Tese.pdf.jpgIM Thumbnailimage/jpeg5962https://repositorio.ufscar.br/bitstream/ufscar/14032/5/Camila%20Tavares%20Brasileiro%20-%20Tese.pdf.jpgd49be6f64f5142ee9b0bb6754738da8dMD55BCO carta comprovante autoarquivamento .pdf.jpgBCO carta comprovante autoarquivamento .pdf.jpgIM Thumbnailimage/jpeg13743https://repositorio.ufscar.br/bitstream/ufscar/14032/7/BCO%20carta%20comprovante%20autoarquivamento%20.pdf.jpgbbd43bea8607ab3c8cbbbd4b70a10172MD57ufscar/140322023-09-18 18:32:08.508oai:repositorio.ufscar.br:ufscar/14032Repositório InstitucionalPUBhttps://repositorio.ufscar.br/oai/requestopendoar:43222023-09-18T18:32:08Repositório Institucional da UFSCAR - Universidade Federal de São Carlos (UFSCAR)false
dc.title.por.fl_str_mv Estudo de massas de porcelanato esmaltado contendo filito como fundente
dc.title.alternative.eng.fl_str_mv Study of glazed porcelain tiles bodies containing phyllite as flux
title Estudo de massas de porcelanato esmaltado contendo filito como fundente
spellingShingle Estudo de massas de porcelanato esmaltado contendo filito como fundente
Brasileiro, Camila Tavares
Porcelanato
Minerais fundentes
Sericita
Fluxo viscoso
Gresificação
Porcelain tile
Fluxing minerals
Sericite
Viscous flow
Vitrification
ENGENHARIAS::ENGENHARIA DE MATERIAIS E METALURGICA::MATERIAIS NAO METALICOS
title_short Estudo de massas de porcelanato esmaltado contendo filito como fundente
title_full Estudo de massas de porcelanato esmaltado contendo filito como fundente
title_fullStr Estudo de massas de porcelanato esmaltado contendo filito como fundente
title_full_unstemmed Estudo de massas de porcelanato esmaltado contendo filito como fundente
title_sort Estudo de massas de porcelanato esmaltado contendo filito como fundente
author Brasileiro, Camila Tavares
author_facet Brasileiro, Camila Tavares
author_role author
dc.contributor.authorlattes.por.fl_str_mv http://lattes.cnpq.br/9731753452170666
dc.contributor.author.fl_str_mv Brasileiro, Camila Tavares
dc.contributor.advisor1.fl_str_mv Boschi, Anselmo Ortega
dc.contributor.advisor1Lattes.fl_str_mv http://lattes.cnpq.br/3259846931278607
dc.contributor.advisor-co1.fl_str_mv Dondi, Michele
dc.contributor.advisor-co1Lattes.fl_str_mv http://lattes.cnpq.br/4617859135105539
dc.contributor.authorID.fl_str_mv e1f9fdab-f8a2-4dbf-8d00-a0947fd57b9a
contributor_str_mv Boschi, Anselmo Ortega
Dondi, Michele
dc.subject.por.fl_str_mv Porcelanato
Minerais fundentes
Sericita
Fluxo viscoso
Gresificação
topic Porcelanato
Minerais fundentes
Sericita
Fluxo viscoso
Gresificação
Porcelain tile
Fluxing minerals
Sericite
Viscous flow
Vitrification
ENGENHARIAS::ENGENHARIA DE MATERIAIS E METALURGICA::MATERIAIS NAO METALICOS
dc.subject.eng.fl_str_mv Porcelain tile
Fluxing minerals
Sericite
Viscous flow
Vitrification
dc.subject.cnpq.fl_str_mv ENGENHARIAS::ENGENHARIA DE MATERIAIS E METALURGICA::MATERIAIS NAO METALICOS
description The production of ceramic tiles is growing worldwide and Brazil is the third-largest producer in the world. Porcelain tiles represent a significant fraction of this production and the trend is for significant growth in the market for this type of product in the coming decades. This scenario is marked by the increasing demand for raw materials. However, the progressive depletion of the main deposits of feldspar leads the ceramic industry to look for substitutes for this flux. A considerable part of the Brazilian industry, for several reasons, has already replaced feldspar, traditionally used as a fluxing agent, with phyllite, consisting basically of quartz, kaolinite, and sericite. Brazil is the only country that uses phyllite in the glazed porcelain masses. This gives the Brazilian industry an important competitive advantage in this segment. However, as other producers use feldspar, there are practically no studies on the effects of replacing feldspar with sericite in glazed porcelain tiles compositions. Initial studies showed very significant differences in the behavior of glazed porcelain masses containing the same content of feldspar and phyllite during firing. Based on this, the objective of this thesis was to identify how the mineral through which the fluxing ions are introduced into the porcelain composition affects its behavior during firing. In an unprecedented way, this work formulates a feldspar composition with the same flux content as the phyllite (synthetic phyllite with feldspar) with the same chemical composition and assesses its implications. The search for explanations for the observed differences was based mainly on the volume and characteristics of the liquid phase developed at high temperatures. The results showed that 1) the liquid phases produced by the fusion of sericite and feldspar play a central role in explaining the differences in behavior during heating, 2) the origin of the differences is mainly in the transformations that occur between 950 and 1150 ºC, e) differences at relatively low temperatures are also explained by the effect of granulometry.
publishDate 2020
dc.date.issued.fl_str_mv 2020-12-17
dc.date.accessioned.fl_str_mv 2021-03-26T12:57:07Z
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dc.identifier.citation.fl_str_mv BRASILEIRO, Camila Tavares. Estudo de massas de porcelanato esmaltado contendo filito como fundente. 2020. Tese (Doutorado em Ciência e Engenharia de Materiais) – Universidade Federal de São Carlos, São Carlos, 2020. Disponível em: https://repositorio.ufscar.br/handle/ufscar/14032.
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identifier_str_mv BRASILEIRO, Camila Tavares. Estudo de massas de porcelanato esmaltado contendo filito como fundente. 2020. Tese (Doutorado em Ciência e Engenharia de Materiais) – Universidade Federal de São Carlos, São Carlos, 2020. Disponível em: https://repositorio.ufscar.br/handle/ufscar/14032.
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