Bismuth borate glass-based Ce:YAG glass ceramic for white light LED and preparation method thereof

A technology of boron bismuth salt and glass ceramics, which is applied in lighting and heating equipment, optical elements for changing the spectral characteristics of emitted light, coatings, etc., and can solve problems such as limited development, lack of red light, and poor thermal stability , to achieve the effect of low cost, good chemical stability and excellent lumen efficiency

Active Publication Date: 2019-04-09
JIANGXI UNIV OF SCI & TECH +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the current commercial white LEDs have problems such as poor thermal stability caused by organic packaging and low color rendering due to lack of red light, which limits their application and development in the field of high-power, high-quality lighting.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0049] The preparation method of above-mentioned boron-bismuth salt glass-based Ce:YAG glass-ceramic, comprises the steps:

[0050] Organic mixture, low melting point fine glass powder and YAG:Ce 3+ Phosphor powder is mixed, stirred for 10-30 minutes, and then made into printing paste, ready for use;

[0051] After passing the printing slurry through a 200-mesh screen screen through screen printing technology, it is printed on the matrix red glass sheet placed on the printing platform to obtain a glass ceramic precursor, which is ready for use;

[0052] The glass-ceramic precursor was placed on a copper sheet and sintered in a muffle furnace to obtain a glass-ceramic sample.

Embodiment 1

[0055] Boron-bismuthate glass-based Ce:YAG glass ceramics for white light LEDs are prepared by screen printing and sintering from matrix red glass sheets and printing pastes;

[0056] Printing paste, containing 65% by weight of low melting point fine glass powder, 5% by weight of organic compound and 30% by weight of YAG:Ce 3+ Phosphor powder;

[0057] The general chemical formula of matrix red light glass is x 1 B 2 o 3 x 2 Bi 2 o 3 x 3 MO·x 4 Eu 2 o 3 ;

[0058] The general chemical formula of low melting point fine glass powder is x 5 B 2 o 3 x 6 Bi 2 o 3 x 7 al 2 o 3 x 8 M'O;

[0059] Organic mixture containing 80% by weight of terpineol C 10 h 18 O and 20% by weight of ethyl cellulose C 23 h 24 N 6 o 4 ;

[0060] where x 1 ~x 8 The stoichiometric ratio is as follows:

[0061] x 1 =0.75,x 2 =0.1,x 3 =0.05,x 4 = 0.1;

[0062] x 5 =0.8,x 6 =0.05,x 7 =0.05,x 8 =0.1

[0063] Wherein M is Ca; M' is Ca.

[0064] The preparation process o...

Embodiment 2

[0075] Boron-bismuthate glass-based Ce:YAG glass ceramics for white light LEDs are prepared by screen printing and sintering from matrix red glass sheets and printing pastes;

[0076] Printing paste, containing 15% by weight of low melting point fine glass powder, 75% by weight of organic compound and 10% by weight of YAG:Ce 3+ Phosphor powder;

[0077] The general chemical formula of matrix red light glass is x 1 B 2 o 3 x 2 Bi 2 o 3 x 3 MO·x 4 Eu 2 o 3 ;

[0078] The general chemical formula of low melting point fine glass powder is x 5 B 2 o 3 x 6 Bi 2 o 3 x 7 Al 2 o 3 x 8 M'O;

[0079] Organic mixture, containing 90% by weight of terpineol C 10 h 18 O and 10% by weight of ethyl cellulose C 23 h 24 N 6 o 4 ;

[0080] where x 1 ~x 8 The stoichiometric ratio is as follows:

[0081] x 1 =0.3,x 2 =0.35,x 3 =0.3,x 4 =0.05;

[0082] x 5 =0.25,x 6 =0.6,x 7 =0.05,x 8 =0.1

[0083] Wherein M is Ba; M' is Ba.

[0084] The preparation process ...

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Abstract

The invention belongs to semiconductor blue light chip optical excitation and white light transmission, and discloses boron bismuthate glass based Ce:YAG glass ceramic for white light LED and a preparation method thereof. The glass ceramic is prepared from matrix red light glass sheet and printing slurry through silk-screen printing and sintering, wherein the printing slurry is prepared from low-melting-point fine glass powder, organic mixture and YAG:Ce <3+> fluorescent powder; the matrix red light glass sheet has a chemical general formula of x1B2O3.x2Bi2O3.x3Mo.x4Eu2O3; the low-melting-point fine glass powder has a chemical general formula of x5B2O3.x6Bi2O3.x7Al2O3.x8M'O; and the organic mixture contains terpilenol C10H18O and ethyecellulose C23H24N6O4. The glass ceramic has good thermal stability, good chemical stability, excellent color rendering and luminescence property; and the preparation method has low cost, and can be produced in batches.

Description

technical field [0001] The invention belongs to the technical field of optical excitation and white light emission of semiconductor blue light chips, and in particular relates to a boron-bismuthate glass-based Ce:YAG glass ceramic for white light LEDs and a preparation method thereof. Background technique [0002] White light LEDs are widely used in general lighting, indicator displays, backlights, automotive headlights and other fields because of their long life, energy saving, and environmental friendliness. However, the current commercial white LEDs have problems such as poor thermal stability caused by organic packaging and low color rendering due to lack of red light, which limit their application and development in the field of high-power, high-quality lighting. [0003] Oxide glass, because of its good thermal conductivity and thermal stability, can replace the silicone or epoxy resin packaging in the current commercial white LED, and solve its current problems of poo...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C03C17/00C03C3/15C03C4/12C03C12/00C03C6/00F21V9/00
CPCC03C1/00C03C3/15C03C4/12C03C12/00C03C17/007C03C17/008C03C2217/452C03C2217/475C03C2217/48C03C2217/70C03C2218/119C03C2218/32F21V9/00
Inventor 夏李斌宋碧清岳远盈杨雪莉邓缘李承月庄翊君
Owner JIANGXI UNIV OF SCI & TECH
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