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Ce:YAG microcrystalline glass used for white light LED and preparation method of Ce:YAG microcrystalline glass

A glass-ceramic and glass technology, applied in the field of solid luminescent materials, can solve the problems of unreasonable design of material components, poor optical properties, etc., and achieve the effects of high transparency, excellent luminescent properties, and unique material components

Active Publication Date: 2013-07-03
FUJIAN INST OF RES ON THE STRUCTURE OF MATTER CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0010] In short, there have been some invention patents for glass-ceramics used in white LEDs published at home and abroad so far, but their optical properties are poor mainly due to unreasonable design of material components and other reasons.

Method used

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  • Ce:YAG microcrystalline glass used for white light LED and preparation method of Ce:YAG microcrystalline glass
  • Ce:YAG microcrystalline glass used for white light LED and preparation method of Ce:YAG microcrystalline glass
  • Ce:YAG microcrystalline glass used for white light LED and preparation method of Ce:YAG microcrystalline glass

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0097] will analyze pure SiO 2 、GeO 2 , TeO 2 , B 2 o 3 、K 2 CO 3 , ZnO and Sb 2 o 3 Powder, according to 10SiO 2 : 10GeO 2 : 24TeO 2 : 16B 2 o 3 : 15K 2 CO 3 :20ZnO:5Sb 2 o 3 The proportion (molar ratio) is accurately weighed and placed in an agate mortar, mixed and ground evenly in the agate mortar, then placed in a platinum crucible, placed in a resistance furnace, heated to 800°C, and kept for 2 hours to melt , and then, the glass melt is taken out and quickly poured into a mold for forming to obtain a block precursor glass; the obtained precursor glass is smashed into pieces, and after being uniformly ground in an agate mortar, 5wt% of Ce:YAG phosphor powder is added to further After grinding for 2 hours, place it in a crucible, then put it into a resistance furnace, heat it to 700°C, and keep it warm for 1 hour to melt it. Then, take out the glass melt and quickly pour it into a mold to form it to obtain block glass ceramics (such as figure 1 shown); Fin...

Embodiment 2

[0100] will analyze pure SiO 2 、GeO 2 , TeO 2 , B 2 o 3 、K 2 CO 3 , ZnO and Sb 2 o 3 Powder, according to 10SiO 2 : 10GeO 2 : 24TeO 2 : 16B 2 o 3 : 15K 2 CO 3 :20ZnO:5Sb 2 o 3 The ratio is accurately weighed and placed in an agate mortar, mixed and ground evenly in the agate mortar, then placed in a platinum crucible, placed in a resistance furnace, heated to 800°C and kept for 2 hours to melt, then, the The glass melt is taken out and quickly poured into a mold to form a block precursor glass; the obtained precursor glass is crushed, ground evenly in an agate mortar, and then 1wt% of Ce:YAG phosphor powder is added and further ground for 2 hours Put it in a crucible, then put it into a resistance furnace, heat it to 680°C, and keep it warm for 1 hour to melt it. Then, take out the glass melt and quickly pour it into a mold to form it to obtain block glass ceramics (such as Figure 7 shown); Finally, the obtained glass-ceramic was annealed in a resistance furn...

Embodiment 3

[0102] will analyze pure SiO 2 、GeO 2 , TeO 2 , B 2 o 3 、K 2 CO 3 , ZnO and Sb 2 o 3 Powder, according to 10SiO 2 : 10GeO 2 : 24TeO 2 : 16B 2 o 3 : 15K 2 CO 3 :20ZnO:5Sb 2 o 3 The proportion (molar ratio) is accurately weighed and placed in an agate mortar, mixed and ground evenly in the agate mortar, then placed in a platinum crucible, placed in a resistance furnace, heated to 800°C, and kept for 2 hours to melt , and then, the glass melt is taken out and quickly poured into the mold for forming to obtain a block precursor glass; the obtained precursor glass is smashed into pieces, and after being uniformly ground in an agate mortar, 15wt% of Ce:YAG phosphor powder is added to further After grinding for 2 hours, place it in a crucible, then put it into a resistance furnace, heat it to 650°C, and keep it warm for 1 hour to melt it. Then, take out the glass melt and quickly pour it into a mold to form it to obtain block glass ceramics; finally Put the obtained ...

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Abstract

The invention provides Ce:YAG microcrystalline glass capable of achieving yellow luminescence under the condition of blue light excitation and a preparation method of the Ce:YAG microcrystalline glass, and Ce:YAG fluorescence microcrystals are inlaid uniformly in an oxide glass matrix of the microcrystalline glass. The microcrystalline glass comprises glass components in percentage by mole as follows: 0-10 mol% of SiO2, 0-40 mol% of GeO2, 20-60 mol% of TeO2, 0-25 mol% of B2O3, 0-15 mol% of P2O5, 0-10 mol% of Al2O3, 0-20 mol% of Ae2O, 0-20 mol% of ZnO, 0-15 mol% of BaO, 0-20 mol% of Sb2O3, 0-20 mol% of La2O3 and 0-10 mol% of Bi2O3, wherein Ae is selected from Li, Na or K; and the content of Ce:YAG microcrystals is 1-15 wt% of the oxide glass matrix. The invention further provides a preparation method for the microcrystalline glass. The microcrystalline glass provided by the invention can emit yellow light under the excitation of blue light, the yellow light and the blue light are combined to generate intense white light, and accordingly, the microcrystalline glass and the method can be used for development and application of construction of the white light LED which is excited by a blue light chip.

Description

technical field [0001] The invention relates to the field of solid luminescent materials, in particular to a Ce:YAG glass-ceramic that can be used for white light LEDs and a preparation method thereof. technical background [0002] In recent years, white light-emitting diode (LED) lighting, which has unique advantages such as energy saving and durability, has attracted great attention. At present, it has gradually become a trend to replace traditional incandescent and fluorescent lamps with white LEDs. Common commercial white LEDs are made of blue InGaN chips and Ce-doped 3+ It is made of yttrium aluminum garnet (YAG) phosphor packaged together, and the phosphor is mixed in epoxy resin and coated on the chip. Part of the blue light emitted by the InGaN LED chip is absorbed by the phosphor, causing it to be excited to emit yellow light, and the unabsorbed blue light is mixed with the yellow light emitted by the phosphor to obtain white light. However, due to the poor therm...

Claims

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Application Information

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IPC IPC(8): C03C10/02C03C4/12
Inventor 王元生陈大钦张瑞
Owner FUJIAN INST OF RES ON THE STRUCTURE OF MATTER CHINESE ACAD OF SCI
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