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Fluorescent glass with low melting point 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 reduced luminous efficiency of fluorescent powder, drift of white light tone, easy aging of epoxy resin, etc. The effect of durability

Inactive Publication Date: 2012-02-08
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 resin is easy to age; the phosphor is affected by temperature and moisture, which reduces the luminous efficiency of the phosphor

Method used

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  • Fluorescent glass with low melting point for white light LED and preparation method thereof
  • Fluorescent glass with low melting point for white light LED and preparation method thereof
  • Fluorescent glass with low melting point for white light LED and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] Fluorescent glass with low melting point for white light LED, which contains Na 2 O, ZnO, B 2 o 3 , SiO 2 , Al 2 o 3 , CaO, MgO, K 2 The raw materials of O and Ce-YAG components were prepared; the mass percentage of each component is shown in Table 1.

[0031] Table 1

[0032]

[0033] Concrete preparation process is as follows: 1) at first according to the formula weighing in table 1 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) Na 2 CO 3 , ZnO, H 3 BO 3 , SiO 2 , Al 2 o 3 , CaCO 3 The raw materials are mixed evenly and melted at a melting temperature of 900°C, and kept for 2 hours to obtain molten glass;

[0035] 3) Pour the glass liquid into cold water, carry out water quenching to cool down, and obtain a transparent matrix glass;

[0036] 4) Grind the glass into powder and mix it evenly with Ce-YAG, place it in the sintering furnace, 2 Sintering under...

Embodiment 2

[0040] Fluorescent glass with low melting point for white light LED, which contains Na 2 O, ZnO, B 2 o 3 , SiO 2 , Al 2 o 3 , CaO, MgO, K 2 The raw materials of O and Ce-YAG components are prepared; the mass percentage of each component is shown in Table 2.

[0041] Table 2

[0042]

[0043] Concrete preparation process is as follows: 1) at first according to the formula weighing in table 2 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) Na 2 CO 3 , ZnO, H 3 BO 3 , SiO 2 , Al 2 o 3 , CaCO 3 The raw materials are mixed evenly and melted at a melting temperature of 910°C, and kept for 2 hours to obtain molten glass;

[0045] 3) Pour the glass liquid into cold water, carry out water quenching to cool down, and obtain a transparent matrix glass;

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

Embodiment 3

[0049] Fluorescent glass with low melting point 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] Concrete preparation process is as follows:

[0053] 1) First weigh a certain weight analysis pure raw material according to the formula in table 3 (Na 2 CO 3 , ZnO, H 3 BO 3 , SiO 2 , Al 2 o 3 , CaCO 3 and Ce-YAG raw material);

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

[0055] 3) Pour the glass liquid into cold water, carry out water quenching to cool down, and obtain a transparent matrix glass;

[0056] 4) Grind the glass into powder and mix it evenly with Ce-YAG, place it in the sintering furnace, 2 Sintering under a protect...

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Abstract

The invention relates to a low-melting-point fluorescent glass for white light LEDs and a preparation method thereof. Low-melting fluorescent glass for white light LEDs, characterized in that it is prepared from raw materials containing Na2O, ZnO, B2O3, SiO2, Al2O3, CaO, MgO, K2O and Ce-YAG components; the mass percentage of each component is: Na2O: 1-20%, ZnO: 0-20%, B2O3: 20-40%, SiO2: 10-30%, Al2O3: 1-25%, CaO: 0-10%, MgO: 0-4%, K2O : 0-1.5%, Ce-YAG: 5-30%. The preparation method is firstly to prepare low-melting-point glass by melting method, mix low-melting-point glass powder and fluorescent powder, and obtain low-melting-point fluorescent glass after sintering. The fluorescent glass obtained by the method has both the good luminescence performance of the crystal material and the excellent stability performance of the glass material. It can be used in white light LED devices to solve the problems of poor color stability and durability of current white light LEDs.

Description

technical field [0001] The invention belongs to luminescent materials, in particular to low-melting fluorescent glass doped with fluorescent powder and a preparation method thereof. Background technique [0002] All solid white light emitting diode (light emitting diode, LED), as a new type of lighting source, has many advantages such as energy saving, environmental protection, long life, and strong designability. a revolution in the world. [0003] The realization of white LED is based on the successful research and development of red, green and blue three primary color chips and various phosphors. At present, the methods for LED to realize white light are as follows: the blue LED chip is coated with phosphor powder that emits yellow light that can be excited by blue light, and the two kinds of light are mixed to form white light; the blue LED chip is coated with red light and green light that can be excited by blue light. Phosphor powder, three kinds of light mixed to fo...

Claims

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Application Information

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Patent Type & Authority Patents(China)
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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