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Precious-metal-enhanced Ce-YAG microcrystalline-glass and preparation method thereof

A technology of glass-ceramic and precious metal, applied in the field of glass-ceramic and its preparation, to achieve the effect of enhancing yellow light emission and facilitating ion exchange

Inactive Publication Date: 2013-09-25
杭州久光建筑科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

In 2010, Shunsuke Fujita et al in 42.5mol%SiO 2 -20mol%Y 2 o 3 -34mol%Al 2 o 3 -3mol%Li 2 O-0.5mol%CeO 2 Ce:YAG microcrystals are precipitated in the glass, which can emit high-brightness yellow light under the excitation of blue light, but there is still a certain gap between the emission intensity and the Ce:YAG phosphor obtained by high-temperature calcination.

Method used

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  • Precious-metal-enhanced Ce-YAG microcrystalline-glass and preparation method thereof

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0016] According to the mole percentage of the components, the glass composition is 45SiO 2 -14.9Y 2 o 3 -26Al 2 o 3 -9Li 2 O-5ZrO 2 -0.1CeO 2 , accurately weighed analytically pure SiO 2 , Y 2 o 3 、Al 2 o 3 , Li 2 CO 3 , ZrO 2 and spectrally pure CeO 2 , mixed well and then poured into a crucible, kept in an electric furnace at 1600°C for 2 hours, poured the molten glass melt into a mold quickly, and quickly transferred to an annealing furnace for annealing after the glass was formed. Differential thermal analysis was performed on the prepared glass, and the first crystallization peak temperature of the glass was measured to be 1050°C. The annealed glass sample was heat-treated at 1050°C for 10 hours, and the annealing furnace was closed to cool down to room temperature naturally to obtain precipitated Ce:YAG Crystalline glass-ceramics. Depend on figure 1 As shown in the X-ray powder diffraction test and compared with the PDF card, the precipitated crystal ph...

Embodiment 2

[0018] In terms of mole percentage of components, the glass composition is 48SiO 2 -10Y 2 o 3 -30Al 2 o 3 -5Li 2 O-2ZrO 2 -3TiO 2 -2CeO 2 , accurately weighed analytically pure SiO 2 , Y 2 o 3 、Al 2 o 3 , Li 2 CO 3 , ZrO 2 、TiO 2 and spectrally pure CeO 2 , mixed well and then poured into a crucible, kept in an electric furnace at 1620°C for 2 hours, poured the molten glass melt into a mold quickly, and quickly transferred to an annealing furnace for annealing after the glass was formed. The obtained glass was subjected to differential thermal analysis, and the first crystallization peak temperature of the glass was measured to be 1080°C. The annealed glass sample was heat-treated at 1080°C for 5 hours, then the annealing furnace was closed and the temperature was naturally cooled to room temperature to obtain precipitated Ce 3+ : Glass-ceramics in YAG crystal phase, cut and polished the glass-ceramics for ion exchange experiments. Formulating AgNO 3 and NaN...

Embodiment 3

[0020] The glass composition is 50SiO in terms of molar percentage of components 2 -15Y 2 o 3 -18Al 2 o 3 -10Li 2 O-5TiO 2 -2CeO 2 , accurately weighed analytically pure SiO 2 , Y 2 o 3 、Al 2 o 3 , Li 2 CO 3 , ZrO 2 、TiO 2 and spectrally pure CeO 2 , mixed well and then poured into a crucible, kept in an electric furnace at 1650°C for 2 hours, poured the molten glass melt into a mold quickly, and quickly transferred to an annealing furnace for annealing after the glass was formed. Differential thermal analysis was performed on the prepared glass, and the first crystallization peak temperature of the glass was measured to be 1100°C. The annealed glass sample was heat-treated at 1100°C for 2 hours, and the annealing furnace was closed to cool down to room temperature naturally to obtain precipitated Ce 3+ Glass-ceramic of Ce:YAG crystal phase, the glass-ceramic was cut and polished for ion exchange experiments. Formulating AgNO 3 and NaNO 3 mixed salts, AgNO ...

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Abstract

The invention discloses precious-metal-enhanced Ce-YAG microcrystalline-glass and a preparation method thereof. The method is composed of the following components: 45-50mol% of SiO2, 5-15mol% of Y2O3, 10-30mol% of Al2O3, 5-10mol% of Li2O, 0-5mol% of ZrO2, 0-5mol% of TiO2, and 0.1-5mol% of CeO2. The method provided by the invention has the advantages that: through regulation the components of the glass, for one thing, alkali metal oxide content is improved to above 5mol%, such that ion exchange is benefited; and for another, YAG crystal phase precipitation in glass is realized, and Ce<3+> enters precipitated YAG through occupying the lattices of Y<3+>. Ag nano-particles are precipitated from the surface of microcrystalline-glass. Through plasma resonance enhancing, yellow light emission of Ce<3+>:YAG microcrystalline-glass is enhanced.

Description

technical field [0001] The invention relates to a glass-ceramic and its preparation method, more specifically, it relates to a precious metal reinforced Ce-YAG glass-ceramic and its preparation method. Background technique [0002] In the scheme of realizing white light LED, the indium gallium nitride (InGaN) LED chip emitting blue light and the cerium-doped ion (Ce 3+ ) activated yttrium aluminum garnet (Cerium-doped Yttrium Aluminum Garnet, referred to as Ce 3+ :YAG) phosphor combination to achieve white light emission dominance. At present, what is mainly used in China is to coat a mixture of fluorescent powder and organic resin or silica gel on the surface of the chip. As stated in the patent CN101696085, the white LED assembled in this way will damage the color temperature and light effect of the high-power LED. Dispersing Ce:YAG in the inorganic glass is a good solution. In 2004, Japanese scientist Masayuki Nishi et al. 2 o 3 -Al 2 o 3 -SiO 2 -Er 2 o 3 YAG cr...

Claims

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Application Information

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IPC IPC(8): C03C10/14
Inventor 丁国宝
Owner 杭州久光建筑科技有限公司
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