New sol-gel method for synthesis of Dy-doped yttrium disilicate phosphor not from TEOS but sodium silicate solution

Página do item simplificado
dc.contributor.authorYAMAGATA, CHIEKOpt_BR
dc.contributor.authorMORAIS, VINICIUS R.pt_BR
dc.contributor.authorMELLO-CASTANHO, SONIA R.H.pt_BR
dc.coverageInternacionalpt_BR
dc.creator.eventoPACIFIC RIM CONFERENCE OF CERAMIC SOCIETIES, 13thpt_BR
dc.date.accessioned2021-01-26T15:23:53Z
dc.date.available2021-01-26T15:23:53Z
dc.date.eventoOctober 27 - November 1, 2019pt_BR
dc.description.abstractYttrium disilicate/pyrosilicate (Y2Si2O7), which occurs naturally as yttrialite, is a mixture of rare earth silicates that displays interesting structural properties because of its high refractoriness (mp = 1775 °C) and stability in oxidizing environments. Yttrium disilicate offers a wide band gap and excellent thermal and chemical stability compared to other well-studied phosphors such as ZnS and CdS. It has been shown to be one of the most efficient host lattices for rare earth ions, which substitute Y3+ ions [1, 2]. Yttrium silicates doped with different metallic ions exhibit attractive luminescent properties for potential applications, such as plasma displays, laser materials and high-energy phosphors [3]. The synthesis methods frequently used to obtain Y2Si2O7 are the conventional solid-state reaction, sol-gel and hydrothermal process. The sol–gel process is based on the polycondensation of hydrolyzed alkoxides or colloidal dispersions, therefore non-substituted and substituted silicon alkoxides are used as source of Si, typically Si(OC2H5)4 (TEOS) or CH3–Si(OC2H5)3 (MTEOS). In the present work, a new method to synthesize Dy-doped yttrium disilicate (Dy0,05Y1,95Si2O7) phosphors is proposed using a combination of sol-gel and coprecipitation techniques. The gel of silica particles were obtained by surfactant-assisted sol-gel process [4], from sodium silicate solution, an unusual precursor of Si. Then yttrium and dysprosium were co-precipitated over these particles. Pure α-phase and β-phase of Y2Si2O7 were obtained after calcining the synthesized precursor at 1100°C and 1400°C respectively (Fig. 1). β-phase showed superior luminescence efficiency (Fig. 2).pt_BR
dc.event.siglaPACRIMpt_BR
dc.identifier.citationYAMAGATA, CHIEKO; MORAIS, VINICIUS R.; MELLO-CASTANHO, SONIA R.H. New sol-gel method for synthesis of Dy-doped yttrium disilicate phosphor not from TEOS but sodium silicate solution. In: PACIFIC RIM CONFERENCE OF CERAMIC SOCIETIES, 13th, October 27 - November 1, 2019, Okinawa, Japan. <b>Abstract...</b> Disponível em: http://200.136.52.105/handle/123456789/31777.
dc.identifier.orcid0000-0002-0967-0807pt_BR
dc.identifier.orcidhttps://orcid.org/0000-0002-0155-9100
dc.identifier.urihttp://200.136.52.105/handle/123456789/31777
dc.local.eventoOkinawa, Japanpt_BR
dc.rightsopenAccesspt_BR
dc.titleNew sol-gel method for synthesis of Dy-doped yttrium disilicate phosphor not from TEOS but sodium silicate solutionpt_BR
dc.typeResumo de eventos científicospt_BR
dspace.entity.typePublication
ipen.autorVINICIUS RIBAS DE MORAIS
ipen.autorSONIA REGINA HOMEM DE MELLO CASTANHO
ipen.autorCHIEKO YAMAGATA
ipen.codigoautor12741
ipen.codigoautor1552
ipen.codigoautor177
ipen.contributor.ipenauthorVINICIUS RIBAS DE MORAIS
ipen.contributor.ipenauthorSONIA REGINA HOMEM DE MELLO CASTANHO
ipen.contributor.ipenauthorCHIEKO YAMAGATA
ipen.date.recebimento21-01
ipen.event.datapadronizada2019pt_BR
ipen.identifier.ipendoc27548pt_BR
ipen.notas.internasAbstractpt_BR
ipen.type.genreResumo
relation.isAuthorOfPublication9f760f15-bbde-432d-a433-fa230a95f318
relation.isAuthorOfPublication421edd64-5958-445c-9f93-1e13aabaa72a
relation.isAuthorOfPublication9a4bd34a-7406-42f3-8741-5c934840fdc9
relation.isAuthorOfPublication.latestForDiscovery9a4bd34a-7406-42f3-8741-5c934840fdc9
sigepi.autor.atividadeMELLO-CASTANHO, SONIA R.H.:1552:720:Npt_BR
sigepi.autor.atividadeMORAIS, VINICIUS R.:12741:720:Npt_BR
sigepi.autor.atividadeYAMAGATA, CHIEKO:177:720:Spt_BR
Pacote Original
Agora exibindo 1 - 1 de 1
Imagem de Miniatura
Nome:
27548.pdf
Tamanho:
264.59 KB
Formato:
Adobe Portable Document Format
Descrição:
Baixar
Licença do Pacote
Agora exibindo 1 - 1 de 1
Nenhuma Miniatura disponível
Nome:
license.txt
Tamanho:
1.71 KB
Formato:
Item-specific license agreed upon to submission
Descrição:
Baixar
Coleções
Eventos - Resumos