Pigmentos nanométricos de alumina dopada com ferro, níquel e manganês
Autor(a) principal: | |
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Data de Publicação: | 2006 |
Tipo de documento: | Tese |
Idioma: | por |
Título da fonte: | Repositório Institucional da UFSCAR |
Texto Completo: | https://repositorio.ufscar.br/handle/ufscar/6142 |
Resumo: | In the recent years, the necessity of ceramic pigments production with new shades and variable distributions of particle size has increased considerably. The color and size of pigment particles are responsible for important applications in the ceramic industries, resins, cosmetics, dyes, plastics and dentistry materials. In this work, nanometric pigments based on iron, nickel and manganese doped Al2O3 (1, 2, 4 and 8 mol% of cations) were prepared using the polymeric precursor method. The powders were calcinated in temperatures ranging from 700 to 1100°C. The γ-Al2O3 and α-Al2O3 crystalline phases obtained at 900 and 1100°C, respectively, were identified by X-ray diffraction. Using the Rietveld Method was possible to quantify the α-Al2O3 solid solution containing Fe3+, Ni2+ and Mn2+. The secondary phases, NiAl2O4 and Mn3O4, increased with the doping concentration of the cations Ni2+ and Mn2+, respectively. Infrared spectroscopy allowed the characterization of the alumina vibrational modes and identification the octahedral and tetrahedral sites of the Al2O3 structure. Nanometric particles, around 10 nm, of iron, nickel and manganese doped Al2O3 obtained at 900°C were observed by transmission electronic microscopy images. The electronic transitions of Fe3+, Ni2+ and Mn2+ were characterized by ultraviolet-visible reflectance spectroscopy. The pigment colors, yellow for iron, blue and green for nickel, and brown and red for manganese were described by Colorimetric analyses using the CIELab colors system. These colors are related with the amount of chromophores in the alumina composition, the powders calcination temperature and the ions occupation sites in the alumina lattice. The obtained nanometric pigments have potential applications in cosmetic and polymers areas. |
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Lima, Renata Cristina deSilva, Elson Longo dahttp://lattes.cnpq.br/9848311210578810http://lattes.cnpq.br/58945294813393258d65eca4-aaad-46b9-a24b-cdd38bc6f3a52016-06-02T20:34:16Z2009-10-292016-06-02T20:34:16Z2006-11-08LIMA, Renata Cristina de. Nanometric pigments of iron, nickel and manganese doped alumina. 2006. 119 f. Tese (Doutorado em Ciências Exatas e da Terra) - Universidade Federal de São Carlos, São Carlos, 2006.https://repositorio.ufscar.br/handle/ufscar/6142In the recent years, the necessity of ceramic pigments production with new shades and variable distributions of particle size has increased considerably. The color and size of pigment particles are responsible for important applications in the ceramic industries, resins, cosmetics, dyes, plastics and dentistry materials. In this work, nanometric pigments based on iron, nickel and manganese doped Al2O3 (1, 2, 4 and 8 mol% of cations) were prepared using the polymeric precursor method. The powders were calcinated in temperatures ranging from 700 to 1100°C. The γ-Al2O3 and α-Al2O3 crystalline phases obtained at 900 and 1100°C, respectively, were identified by X-ray diffraction. Using the Rietveld Method was possible to quantify the α-Al2O3 solid solution containing Fe3+, Ni2+ and Mn2+. The secondary phases, NiAl2O4 and Mn3O4, increased with the doping concentration of the cations Ni2+ and Mn2+, respectively. Infrared spectroscopy allowed the characterization of the alumina vibrational modes and identification the octahedral and tetrahedral sites of the Al2O3 structure. Nanometric particles, around 10 nm, of iron, nickel and manganese doped Al2O3 obtained at 900°C were observed by transmission electronic microscopy images. The electronic transitions of Fe3+, Ni2+ and Mn2+ were characterized by ultraviolet-visible reflectance spectroscopy. The pigment colors, yellow for iron, blue and green for nickel, and brown and red for manganese were described by Colorimetric analyses using the CIELab colors system. These colors are related with the amount of chromophores in the alumina composition, the powders calcination temperature and the ions occupation sites in the alumina lattice. The obtained nanometric pigments have potential applications in cosmetic and polymers areas.Nos últimos anos, a necessidade de produção de pigmentos cerâmicos com novas tonalidades e variadas distribuições de tamanho de partículas tem aumentado consideravelmente. A cor e o tamanho das partículas do pigmento são responsáveis pelas importantes aplicações nas indústrias de cerâmicas, resinas, cosméticos, tintas, plásticos e materiais odontológicos. No presente trabalho, pigmentos nanométricos à base de Al2O3 dopado com 1, 2, 4 e 8% em mol de ferro, níquel e manganês foram preparados utilizando-se o método dos precursores poliméricos. Os pigmentos foram obtidos após tratamento térmico entre 700 e 1100°C. As fases cristalinas γ-Al2O3 e α-Al2O3 obtidas a 900 e 1100°C, respectivamente, foram identificadas por difração de raios X. Pelo Método de Rietveld foi possível quantificar a fase α-Al2O3 confirmando a formação de solução sólida com a adição dos cátions Fe3+, Ni2+ e Mn2+. As fases secundárias, NiAl2O4 e Mn3O4, aumentaram com a concentração dos cátions, Ni2+ e Mn2+, respectivamente. A espectroscopia no Infravermelho permitiu caracterizar os modos vibracionais da alumina e identificar os sítios octaédricos e tetraédricos presentes na estrutura da mesma. Partículas nanométricas, em torno de 10 nm, dos pigmentos de alumina com ferro, níquel e manganês obtidos a 900°C foram observadas por microscopia eletrônica de transmissão. As bandas de reflectância referentes às transições eletrônicas do Fe3+, Ni2+ e Mn2+ foram caracterizadas por espectroscopia na região do ultravioleta-visível. As cores dos pigmentos, amarelo para o ferro, azul e verde para o níquel e marrom e vermelho para o manganês foram descritas por análises colorimétricas utilizando o sistema de cores CIELab. Essas cores estão relacionadas à concentração do íon cromóforo na composição da alumina, à temperatura de calcinação dos pós e aos sítios de ocupação dos cátions na rede da alumina. Os pigmentos nanométricos obtidos apresentam potenciais aplicações nas áreas de cosméticos e polímeros, enquanto os micrométricos em pisos e revestimentos.Universidade Federal de Sao Carlosapplication/pdfporUniversidade Federal de São CarlosPrograma de Pós-Graduação em Química - PPGQUFSCarBRQuímica inorgânicaMateriais cerâmicosQuímica do estado sólidoMetais de transiçãoNanopartículasMétodo de PechiniCIENCIAS EXATAS E DA TERRA::QUIMICAPigmentos nanométricos de alumina dopada com ferro, níquel e manganêsNanometric pigments of iron, nickel and manganese doped aluminainfo:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/doctoralThesis-1-1858e0964-d787-4b05-8cfd-92ebfc20599einfo:eu-repo/semantics/openAccessreponame:Repositório Institucional da UFSCARinstname:Universidade Federal de São Carlos (UFSCAR)instacron:UFSCARORIGINAL2102.pdfapplication/pdf6025047https://repositorio.ufscar.br/bitstream/ufscar/6142/1/2102.pdfc5786b6ce4c3a76b6fdddd08f57bc4c9MD51THUMBNAIL2102.pdf.jpg2102.pdf.jpgIM Thumbnailimage/jpeg9009https://repositorio.ufscar.br/bitstream/ufscar/6142/2/2102.pdf.jpg73e35b364485334d539e5ce827ddced8MD52ufscar/61422023-09-18 18:31:10.003oai:repositorio.ufscar.br:ufscar/6142Repositório InstitucionalPUBhttps://repositorio.ufscar.br/oai/requestopendoar:43222023-09-18T18:31:10Repositório Institucional da UFSCAR - Universidade Federal de São Carlos (UFSCAR)false |
dc.title.por.fl_str_mv |
Pigmentos nanométricos de alumina dopada com ferro, níquel e manganês |
dc.title.alternative.eng.fl_str_mv |
Nanometric pigments of iron, nickel and manganese doped alumina |
title |
Pigmentos nanométricos de alumina dopada com ferro, níquel e manganês |
spellingShingle |
Pigmentos nanométricos de alumina dopada com ferro, níquel e manganês Lima, Renata Cristina de Química inorgânica Materiais cerâmicos Química do estado sólido Metais de transição Nanopartículas Método de Pechini CIENCIAS EXATAS E DA TERRA::QUIMICA |
title_short |
Pigmentos nanométricos de alumina dopada com ferro, níquel e manganês |
title_full |
Pigmentos nanométricos de alumina dopada com ferro, níquel e manganês |
title_fullStr |
Pigmentos nanométricos de alumina dopada com ferro, níquel e manganês |
title_full_unstemmed |
Pigmentos nanométricos de alumina dopada com ferro, níquel e manganês |
title_sort |
Pigmentos nanométricos de alumina dopada com ferro, níquel e manganês |
author |
Lima, Renata Cristina de |
author_facet |
Lima, Renata Cristina de |
author_role |
author |
dc.contributor.authorlattes.por.fl_str_mv |
http://lattes.cnpq.br/5894529481339325 |
dc.contributor.author.fl_str_mv |
Lima, Renata Cristina de |
dc.contributor.advisor1.fl_str_mv |
Silva, Elson Longo da |
dc.contributor.advisor1Lattes.fl_str_mv |
http://lattes.cnpq.br/9848311210578810 |
dc.contributor.authorID.fl_str_mv |
8d65eca4-aaad-46b9-a24b-cdd38bc6f3a5 |
contributor_str_mv |
Silva, Elson Longo da |
dc.subject.por.fl_str_mv |
Química inorgânica Materiais cerâmicos Química do estado sólido Metais de transição Nanopartículas Método de Pechini |
topic |
Química inorgânica Materiais cerâmicos Química do estado sólido Metais de transição Nanopartículas Método de Pechini CIENCIAS EXATAS E DA TERRA::QUIMICA |
dc.subject.cnpq.fl_str_mv |
CIENCIAS EXATAS E DA TERRA::QUIMICA |
description |
In the recent years, the necessity of ceramic pigments production with new shades and variable distributions of particle size has increased considerably. The color and size of pigment particles are responsible for important applications in the ceramic industries, resins, cosmetics, dyes, plastics and dentistry materials. In this work, nanometric pigments based on iron, nickel and manganese doped Al2O3 (1, 2, 4 and 8 mol% of cations) were prepared using the polymeric precursor method. The powders were calcinated in temperatures ranging from 700 to 1100°C. The γ-Al2O3 and α-Al2O3 crystalline phases obtained at 900 and 1100°C, respectively, were identified by X-ray diffraction. Using the Rietveld Method was possible to quantify the α-Al2O3 solid solution containing Fe3+, Ni2+ and Mn2+. The secondary phases, NiAl2O4 and Mn3O4, increased with the doping concentration of the cations Ni2+ and Mn2+, respectively. Infrared spectroscopy allowed the characterization of the alumina vibrational modes and identification the octahedral and tetrahedral sites of the Al2O3 structure. Nanometric particles, around 10 nm, of iron, nickel and manganese doped Al2O3 obtained at 900°C were observed by transmission electronic microscopy images. The electronic transitions of Fe3+, Ni2+ and Mn2+ were characterized by ultraviolet-visible reflectance spectroscopy. The pigment colors, yellow for iron, blue and green for nickel, and brown and red for manganese were described by Colorimetric analyses using the CIELab colors system. These colors are related with the amount of chromophores in the alumina composition, the powders calcination temperature and the ions occupation sites in the alumina lattice. The obtained nanometric pigments have potential applications in cosmetic and polymers areas. |
publishDate |
2006 |
dc.date.issued.fl_str_mv |
2006-11-08 |
dc.date.available.fl_str_mv |
2009-10-29 2016-06-02T20:34:16Z |
dc.date.accessioned.fl_str_mv |
2016-06-02T20:34:16Z |
dc.type.status.fl_str_mv |
info:eu-repo/semantics/publishedVersion |
dc.type.driver.fl_str_mv |
info:eu-repo/semantics/doctoralThesis |
format |
doctoralThesis |
status_str |
publishedVersion |
dc.identifier.citation.fl_str_mv |
LIMA, Renata Cristina de. Nanometric pigments of iron, nickel and manganese doped alumina. 2006. 119 f. Tese (Doutorado em Ciências Exatas e da Terra) - Universidade Federal de São Carlos, São Carlos, 2006. |
dc.identifier.uri.fl_str_mv |
https://repositorio.ufscar.br/handle/ufscar/6142 |
identifier_str_mv |
LIMA, Renata Cristina de. Nanometric pigments of iron, nickel and manganese doped alumina. 2006. 119 f. Tese (Doutorado em Ciências Exatas e da Terra) - Universidade Federal de São Carlos, São Carlos, 2006. |
url |
https://repositorio.ufscar.br/handle/ufscar/6142 |
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por |
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por |
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openAccess |
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Universidade Federal de São Carlos |
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Programa de Pós-Graduação em Química - PPGQ |
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UFSCar |
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BR |
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Universidade Federal de São Carlos |
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