Low-melting-point fluorescent glass for white light LED and preparation method thereof

A fluorescent glass, low melting point technology, applied in the field of luminescent materials, can solve the problems of white light tone drift, easy aging of epoxy resin, reduced luminous efficiency of fluorescent powder, etc., achieve excellent luminous performance, achieve durability, solve durability and color. The effect of poor stability

Inactive Publication Date: 2010-02-10
WUHAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In addition, the uneven thickness of the phosphor layer can easily lead to the color shift of the white light produced; the epoxy

Method used

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  • Low-melting-point fluorescent glass for white light LED and preparation method thereof
  • Low-melting-point fluorescent glass for white light LED and preparation method thereof
  • Low-melting-point fluorescent glass for white light LED and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] Low melting point fluorescent glass for white light LED, which contains Na 2 O, ZnO, B 2 O 3 , SiO 2 , Al 2 O 3 , CaO, MgO, K 2 O and Ce-YAG components are prepared from raw materials; the mass percentages of each component are shown in Table 1.

[0031] Table 1

[0032]

[0033] The specific preparation process is as follows: 1) First, weigh a certain weight analysis pure raw material (Na 2 CO 3 , ZnO, H 3 BO 3 , SiO 2 , Al 2 O 3 , CaCO 3 And Ce-YAG raw material);

[0034] 2) Put Na 2 CO 3 , ZnO, H 3 BO 3 , SiO 2 , Al 2 O 3 , CaCO 3 After the raw materials are evenly mixed, they are melted at a melting temperature of 900°C and kept for 2 hours to obtain molten glass;

[0035] 3) Pour the molten glass into cold water and perform water quenching to cool down to obtain a transparent matrix glass;

[0036] 4) Grind the glass into powder and evenly mix with Ce-YAG, put it in the sintering furnace, 2 Sintering in a protective atmosphere, a sintering temperature of 540°C, a heating rat...

Embodiment 2

[0040] Low melting point fluorescent glass for white light LED, which contains Na 2 O, ZnO, B 2 O 3 , SiO 2 , Al 2 O 3 , CaO, MgO, K 2 O and Ce-YAG components are prepared from raw materials; the mass percentages of each component are shown in Table 2.

[0041] Table 2

[0042]

[0043] The specific preparation process is as follows: 1) First, according to the formula in Table 2, weigh a certain weight analysis pure raw material (Na 2 CO 3 , ZnO, H 3 BO 3 , SiO 2 , Al 2 O 3 , CaCO 3 And Ce-YAG raw material);

[0044] 2) Put Na 2 CO 3 , ZnO, H 3 BO 3 , SiO 2 , Al 2 O 3 , CaCO 3 The raw materials are evenly mixed and then melted, and the melting temperature is 910°C, and the temperature is kept for 2 hours to obtain molten glass;

[0045] 3) Pour the molten glass into cold water and perform water quenching to cool down to obtain a transparent matrix glass;

[0046] 4) Grind the glass into powder and evenly mix with Ce-YAG, put it in the sintering furnace, 2 Sintering in a protective atmos...

Embodiment 3

[0049] Low melting point fluorescent glass for white light LED, which contains Na 2 O, ZnO, B 2 O 3 , SiO 2 , Al 2 O 3 , CaO and Ce-YAG components are prepared from raw materials; the mass percentage of each component is shown in Table 3.

[0050] table 3

[0051]

[0052] The specific preparation process is as follows:

[0053] 1) First, weigh a certain weight to analyze pure raw materials (Na 2 CO 3 , ZnO, H 3 BO 3 , SiO 2 , Al 2 O 3 , CaCO 3 And Ce-YAG raw material);

[0054] 2) Put Na 2 CO 3 , ZnO, H 3 BO 3 , SiO 2 , Al 2 O 3 , CaCO 3 The raw materials are evenly mixed and then melted, the melting temperature is 920°C, and the temperature is kept for 2 hours to obtain molten glass;

[0055] 3) Pour the molten glass into cold water and perform water quenching to cool down to obtain a transparent matrix glass;

[0056] 4) Grind the glass into powder and evenly mix with Ce-YAG, put it in the sintering furnace, 2 Sintering in a protective atmosphere, a sintering temperature of 560°C, a h...

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Abstract

The invention relates to low-melting-point fluorescent glass for a white light LED and a preparation method thereof. The low-melting-point fluorescent glass for the white light LED is characterized bybeing prepared from raw materials containing the following components in percentage by weight: 1-20 percent of Na2O, 0-20 percent of ZnO, 20-40 percent of B2O3, 10-30 percent of SiO2, 1-25 percent ofAl2O3, 0-10 percent of CaO, 0-4 percent of MgO, 0-1.5 percent of K2O and 5-30 percent of Ce-YAG. The preparation method comprises the following steps: firstly preparing low-melting-point glass by a fusion method, then mixing low-melting-point glass powder with fluorescent powder, and finally acquiring the low-melting-point fluorescent glass after sintering. The fluorescent glass acquired by the method has good luminescent performance of crystalline materials and excellent stability of glass materials, and can be used for white light LED devices for solving the problems of poor color stabilityand durability of the current white light LED.

Description

Technical field [0001] The invention belongs to a luminescent material, and particularly relates to a low melting point fluorescent glass doped with fluorescent powder and a preparation method thereof. Background technique [0002] All-solid white light emitting diodes (LEDs), as a new type of lighting source, have the advantages of energy saving, environmental protection, long life, strong designability, etc., and will replace the lighting sources represented by incandescent lamps and fluorescent lamps, leading to lighting A revolution in the world. [0003] The realization of white LED is based on the successful research and development of red, green and blue chips and various phosphors. At present, the methods for achieving white light in LEDs are: coating a blue LED chip with a yellow-emitting phosphor that can be excited by blue light, and the two types of light are mixed to form white light; a blue LED chip is coated with red and green light that can be excited by blue light...

Claims

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Application Information

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IPC IPC(8): C03C3/068C03C4/12
Inventor 程金树汤李缨李宏陈珍霞田培静谢俊郑伟宏陆平
Owner WUHAN UNIV OF TECH
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