Novel method for the synthesis of Dy-doped yttrium disilicate phosphors
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2018
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INTERNATIONAL CONGRESS ON CERAMICS, 7th; CONGRESSO BRASILEIRO DE CERÂMICA, 62.
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Yttrium disilicate (Y2Si2O7) displays interesting structural properties because of its
high refractoriness and stability in oxidizing environments. With its wide band gap and
excellent thermal and chemical stability, it has been shown to be one of the most
efficient host lattices for rare earth ions, which substitute Y3+ ions. When it is doped
with different metallic ions, yttrium silicates exhibit attractive luminescent properties for
potential applications, such as plasma displays, laser materials and high-energy
phosphors. The use of solid-state reaction for yttrium disilicate synthesis shows
disadvantages such as long times and temperatures of processing and formation of
undesirable by-products. The objective of this work was to obtain silica (SiO2)
nanoparticles by surfactant-assisted sol-gel process, using sodium silicate (Na2SiO3)
as Si precursor, and its application on the synthesis of yttrium disilicate-based
(Y2Si2O7) phosphors. Yttrium hydroxide was added to obtained silica nanoparticles,
by precipitation from yttrium nitrate. Two precursors of yttrium disilicate were prepared:
un-doped and doped with dysprosium 2,5 at %, (Y1,95Dy0,05Si2O7). The obtained
powders were characterized by X-ray diffraction (XRD), to identify the polymorphic
phases of yttrium disilicate, scanning electron microscopy (SEM), to observation of
morphology. and luminescence spectroscopy. It was observed that ?-phase of
Y2Si2O7 was obtained at 1300°C and showed sharper luminescence peaks in
comparison with ?-phase.
7th International Congress on Ceramics & 62º Congresso Brasileiro de Cerâmica
June 17-21, 2018, Foz do Iguaçu - PR - Brazil
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Como referenciar
YAMAGATA, C.; LEME, D.R.; MORAIS, V.R. Novel method for the synthesis of Dy-doped yttrium disilicate phosphors. In: INTERNATIONAL CONGRESS ON CERAMICS, 7th; CONGRESSO BRASILEIRO DE CERÂMICA, 62., June 17-21, 2018, Foz do Iguaçu, PR. Abstract... p. 626-626. Disponível em: http://repositorio.ipen.br/handle/123456789/29699. Acesso em: 20 Mar 2026.
Esta referência é gerada automaticamente de acordo com as normas do estilo IPEN/SP (ABNT NBR 6023) e recomenda-se uma verificação final e ajustes caso necessário.