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Transparent Ce:YAG microcrystalline glass and application of transparent Ce:YAG microcrystalline glass in white LED

A technology of glass-ceramics and glass, applied in the field of inorganic materials, to achieve the effect of matching refractive index, saving heat treatment process and reducing production cost

Active Publication Date: 2015-04-22
WENZHOU UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

So far, there is no report on the preparation of spontaneous crystallization of Ce:YAG glass-ceramics for white LEDs by one-step melting cooling method

Method used

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  • Transparent Ce:YAG microcrystalline glass and application of transparent Ce:YAG microcrystalline glass in white LED
  • Transparent Ce:YAG microcrystalline glass and application of transparent Ce:YAG microcrystalline glass in white LED
  • Transparent Ce:YAG microcrystalline glass and application of transparent Ce:YAG microcrystalline glass in white LED

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0043] will analyze pure SiO 2 、Al 2 o 3 , Y 2 o 3 , PbO, CeF 3 , B 2 o 3 , by 20 parts SiO 2 : 19.5 Al 2 o 3 : 9.5 parts Y 2 o 3 : 46 parts PbO: 0.5 parts CeF 3 : 5 copies of B 2 o 3 (mol fractions) of the proportion of accurate weighing and placed in an agate mortar, mixed in the agate mortar and ground evenly, then placed in a corundum crucible, placed in a resistance furnace, heated to 1450 ° C, and then kept for 2 hours to make it After melting, the glass melt is taken out and quickly poured into a cast iron mold with a temperature of 650°C, then placed in a muffle furnace for annealing, kept at 800°C for 3 hours, and then cooled to 20°C with the furnace to form spontaneous crystallization Transparent Ce:YAG glass-ceramics.

[0044] The prepared Ce:YAG glass-ceramic was tested for spectral properties, and its XRD pattern is as follows figure 2 As shown, the XRD diffraction peaks of the glass-ceramic sample are consistent with the main diffraction peaks of...

Embodiment 2

[0046] will analyze pure SiO 2 、Al 2 o 3 , Y 2 o 3 , PbO, CeF 3 , B 2 o 3 , by 23 parts SiO 2 : 19 Al 2 o 3 : 9 copies of Y 2 o 3 : 45 parts PbO: 0.5 parts CeF 3 : 4 copies of B 2 o 3 (mol fractions) of the proportion of accurate weighing and placed in an agate mortar, mixed in the agate mortar and ground evenly, then placed in a corundum crucible, placed in a resistance furnace, heated to 1500 ° C and kept for 2 hours to make After melting, the glass melt is taken out and quickly poured into a cast iron mold with a temperature of 650°C, then placed in a muffle furnace for annealing, kept at 800°C for 3 hours, and then cooled to 20°C with the furnace to form spontaneous crystallization Transparent Ce:YAG glass-ceramics. Coupling glass-ceramics with a 460nm blue light chip can emit bright white light under blue light excitation. The obtained glass-ceramic is excited by a wavelength of 460nm, the maximum wavelength can reach 534nm, and the luminous efficiency can...

Embodiment 3

[0048] will analyze pure SiO 2 、Al 2 o 3 , Y 2 o 3 , PbO, CeF 3 , B 2 o 3 , by 25 parts SiO 2 : 20 Al 2 o 3 : 10 copies of Y 2 o 3 : 43 parts PbO: 0.5 parts CeF 3 : 3 copies of B 2 o 3 (mol fractions) of the proportion of accurate weighing and placed in an agate mortar, mixed in the agate mortar and ground evenly, then placed in a corundum crucible, placed in a resistance furnace, heated to 1600 ° C, and then kept for 2 hours to make it After melting, the glass melt is taken out and quickly poured into a cast iron mold with a temperature of 650°C, then placed in a muffle furnace for annealing, kept at 800°C for 3 hours, and then cooled to 20°C with the furnace to form spontaneous crystallization Transparent Ce:YAG glass-ceramics. Coupling glass-ceramics with a 460nm blue light chip can emit bright white light under blue light excitation. The obtained glass-ceramic is excited by a wavelength of 460nm, the maximum wavelength can reach 532nm, and the luminous effi...

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Abstract

The invention discloses transparent Ce:YAG microcrystalline glass and application of the transparent Ce:YAG microcrystalline glass in a white LED. The microcrystalline glass is self-crystallized, and is prepared from the following active materials in percentage by mole: 19-30mol% of SiO2, 15-30mol% of Al2O3, 5-20mol% of Y2O3, 40-60mol% of PbO, 0.5-5mol% of CeF3 and 2-10mol% of B2O3, wherein the sum of the mole percentage of the components is 100 percent. The Ce:YAG microcrystalline glass disclosed by the invention meets the requirements that the glass melting temperature is low, a preparation method is simple, the raw materials are readily available, the production cycle is short, the batch production is easily realized, and the glass is stable in physicochemical properties, high in uniformity, long in service life and high in heat conductivity; and moreover, the Ce:YAG microcrystalline glass emits bright yellow light under blue light excitation of 465nm, the yellow light and blue light are combined to generate strong white light, and the microcrystalline glass can be used for preparing the white LED.

Description

technical field [0001] The invention relates to the field of inorganic materials, in particular to a transparent Ce:YAG glass-ceramic and its application in white light LEDs. Background technique [0002] White light-emitting diodes, which have many advantages such as compact size, shock resistance, fast response (μs), energy saving and long life (10,000 hours), green and high efficiency, have attracted great attention. At present, white LED fluorescent materials mainly use amorphous phosphor powder as the main body, and commercialized white light LED products are made by combining and packaging blue light InGaN chips and phosphor powder. When the LED emits light, it will generate a lot of heat. Generally, the temperature around the lit chip will reach 150°C to 200°C. Such a temperature will cause the efficiency of the phosphor to drop by 20-30%, resulting in a shift in the color temperature and color coordinates of the light source. At the same time, it also affects the l...

Claims

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Application Information

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IPC IPC(8): C03C10/16
Inventor 梁晓娟黄俊向卫东
Owner WENZHOU UNIVERSITY
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