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Novel fluorescent glass and preparation method thereof

A fluorescent glass and glass technology, applied in the field of new fluorescent glass and its preparation, can solve the problems of low luminous efficiency, inability to meet the requirements of high reliability, ultra-long life and high light transmittance, unstable luminous performance, etc. Luminous efficiency, improve light conversion efficiency, solve the effect of uneven coating

Inactive Publication Date: 2013-04-17
SOUTH CHINA NORMAL UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

There are still disadvantages such as low luminous efficiency and unstable luminous performance, which cannot meet people's requirements for high reliability, long life, and high light transmittance of LEDs, as well as requirements for LED preparation, packaging methods, efficiency, and cost.

Method used

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  • Novel fluorescent glass and preparation method thereof
  • Novel fluorescent glass and preparation method thereof
  • Novel fluorescent glass and preparation method thereof

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preparation example Construction

[0026] Novel fluorescent glass of the present invention, this fluorescent glass is made of P 2 o 5 , ZnO, MgO, Na 2 O. Li 2 The glass matrix composed of O and the Ce-YAG phosphor raw material are synthesized, wherein the molar percentage of each component of the glass matrix is: P 2 o 5 : 30%~50%, ZnO: 15%~30%, MgO: 15%~25%, Na 2 O: 5% to 13%, Li 2 O: 0.5% to 2%, and the amount of Ce-YAG phosphor accounts for 1% to 50% of the total weight of the glass matrix. Wherein, when each component in the present invention adopts the following percentage ranges, the effect is the best. At this time, the above-mentioned P 2 o 5 The molar percentage of ZnO in the glass matrix is ​​35% to 45%, the molar percentage of the above ZnO in the glass matrix is ​​18% to 25%, the molar percentage of the above MgO in the glass matrix is ​​18% to 20%, and the above Na 2 The molar percentage of O in the glass matrix is ​​6.5% to 10.5%, and the above Li 2 The molar percentage of O in the glass ...

Embodiment 1

[0032] Embodiment 1: a kind of novel fluorescent glass, by P 2 o 5 , ZnO, MgO, Na 2 O. Li2 Synthesis of O and Ce-YAG phosphor raw materials. Raw material mole percentages and process parameters are shown in the table below:

[0033] 1)

[0034] 2) Weigh a certain weight of analytically pure raw material P according to the formula in the above table 2 o 5 , ZnO, MgO, sodium hexametaphosphate, Li 2 O and Ce-YAG phosphors.

[0035] 3) Calcining the glass matrix raw material at 1050°C and keeping it warm for 0.5-2h to obtain molten glass.

[0036] 4) Pour the obtained molten glass into cold water for water quenching to obtain a transparent glass matrix.

[0037] 5) Crush and ball mill the glass matrix obtained in the previous step to obtain micron-sized glass powder.

[0038] 6) Fully mix the glass powder with Ce-YAG fluorescent powder accounting for 10% by weight of the glass powder in a ball mill, calcining at 600°C for...

Embodiment 2

[0039] Embodiment 2: a kind of novel fluorescent glass, by P 2 o 5 , ZnO, MgO, Na 2 O. Li 2 Synthesis of O and Ce-YAG phosphor raw materials. Raw material mole percentages and process parameters are shown in the table below:

[0040] 7)

[0041] 8) Weigh a certain weight of analytically pure raw material P according to the formula in the above table 2 o 5 , ZnO, MgO, sodium hexametaphosphate, Li 2 O and Ce-YAG phosphors.

[0042] 9) Calcining the glass matrix raw material at 1050°C and keeping it warm for 0.5-2h to obtain molten glass.

[0043] 10) Pour the obtained molten glass into cold water for water quenching to obtain a transparent glass matrix.

[0044] 11) Crush and ball mill the glass matrix obtained in the previous step to obtain micron-sized glass powder.

[0045] 10) Fully mix the glass powder with Ce-YAG phosphor powder accounting for 15% by weight of the glass powder in a ball mill, calcining at 700°C for 1.5 hours, then casting, annealing, cutting, g...

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Abstract

The invention discloses novel fluorescent glass and a preparation method thereof. The fluorescent glass is synthesized from a glass matrix prepared from 30%-50% of P2O5, 15%-30% of ZnO, 15%-25% of MgO, 5%-13% of Na2O and 0.5%-2% Li2O according to molar percentage, and a Ce-YAG fluorescent powder material accounting for 1%-50% of the total weight of the glass matrix. A fluorescent glass sheet is taken as an encapsulation material of a white light-emitting diode (LED), the shape and the thickness of the fluorescent glass sheet can be effectively controlled, and the uneven coating of the fluorescent powder is well avoided, so that the luminous efficiency, the service life and the spectrum stability of the white LED are improved. Furthermore, the novel fluorescent glass has the advantages that the preparation process is simple, the processing and shaping are easy, the raw materials are cheap, and the large-scale industrial production can be realized.

Description

technical field [0001] The invention relates to material preparation of LED fluorescent lamps, in particular to a novel fluorescent glass and a preparation method thereof. Background technique [0002] Since its inception, white LED has been praised as the fourth-generation lighting source after incandescent lamp, fluorescent lamp and gas discharge because of its advantages such as long service life, high efficiency and energy saving, and environmental protection. At present, the working current of low-power LEDs is tens of milliamps, and the power is relatively small. The existing packaging materials and packaging technologies can already meet its needs. For watt-level high-power LEDs, the working current of the chip is generally above 350mA, and the power consumption ranges from 1W to 5W or even higher. This kind of high-power chip packaging puts forward new requirements for packaging materials and technologies. High power will lead to accelerated aging of epoxy resin pac...

Claims

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Application Information

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IPC IPC(8): C03C4/12C03C3/16
Inventor 陈志武范广涵郑树文张涛肖瑶贺龙飞
Owner SOUTH CHINA NORMAL UNIVERSITY
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