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Red light-emitting phosphor powder excited by UV and blue light LED

A phosphor and ultraviolet light technology, applied in the field of phosphors, can solve the problems of uneven distribution, large particle size, uneven luminescence of phosphors, etc., and achieve the effects of sufficient reaction, uniform mixing and good chemical stability

Active Publication Date: 2006-12-20
DALIAN LUMINGLIGHT SCIENCE & TECHNOLOGY CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Large particle size and uneven distribution, resulting in uneven light emission and low luminous intensity of phosphor powder in LED packaging resin

Method used

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  • Red light-emitting phosphor powder excited by UV and blue light LED
  • Red light-emitting phosphor powder excited by UV and blue light LED
  • Red light-emitting phosphor powder excited by UV and blue light LED

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] Embodiment one: (Sr0.6 Ba 0.1 Mg 0.3 )(Y 0.3 Al 0.4 Ga 0.3 ) 16 o 24 :Mn 0.005 T m 0.01 Eu 0.01

[0028] SrCO 3 8.856g Ga 2 o 3 44.98g Basic Magnesium 3.022g

[0029] BaCO 3 1.973g MnCO 3 0.115g

[0030] Y 2 o 3 54.19g Tm 2 o 3 0.193g

[0031] Al 2 o 3 32.64g Eu 2 o 3 0.176g

[0032] Flux 2.6g (CaF 2 , (NH 4 ) 2 HPO 4 , Li 2 CO 3 )

[0033] Put the above raw materials into a corundum ball mill jar and grind them evenly on a grinder, then put them into a 95% porcelain crucible, pre-fire at 1000°C for 8 hours in an oxygen atmosphere, cool and grind them, and then sinter at a high temperature of 1350°C for 10 hours. After crushing and sieving, the fluorescent powder was dispersed in an ethanol medium, classified by fluid sedimentation separation technology, and dried to obtain a material with a central particle diameter of 5.6 μm. Under the excitation of 300nm-500nm light (especially 400nm and 470nm), it presents an emission...

Embodiment 2

[0034] Embodiment two: (Sr 0.1 Ca 0.9 )(Gd 0.3 Al 0.7 ) 18 o 28 :Mn 0.03 Dy 0.02 SM 0.01

[0035] SrCO 3 1.471g MnSO 4 .H 2 O 0.507g

[0036] CaCO 3 9.000g Dy 2 o 3 0.373g

[0037] Gd 2 o 3 97.90g Sm 2 o 3 0.174g

[0038] Al 2 o 3 64.26g

[0039] Flux 2.4g (NH 4 F 1.0g MgF 2 0.5g H 3 BO 3 0.9g)

[0040] Put the above raw materials into a corundum ball mill pot and grind them evenly on a grinder, then put them into a 95% porcelain crucible, pre-fire at 1200°C for 6 hours in an oxygen atmosphere, cool and grind them, and then fire them at a high temperature of 1400°C for 6 hours. After crushing and sieving, the fluorescent powder was dispersed in an ethanol medium, classified by fluid sedimentation separation technology, and dried to obtain a material with a central particle diameter of 4.8 μm. Under the excitation of 300nm-500nm light (especially 400nm and 470nm), it presents an emission spectrum of 630nm-680nm. The peak w...

Embodiment 3

[0041] Embodiment three: Ca (Gd 0.1 Al 0.9 ) 14 o 22 :Mn 0.005 Eu 0.01 Ho 0.02

[0042] CaCO 3 10.00g MnCO 3 0.057g

[0043] Gd 2 o 3 25.38g Eu 2 o 3 0.176g

[0044] Al 2 o 3 64.26g Ho 2 o 3 0.378g

[0045] Flux 1.9g (NH 4 Cl 0.8g NaCl 0.4g K 3 PO 4 0.7g)

[0046] Put the above raw materials into a corundum ball mill jar and grind them evenly on a grinder, then put them into a 95% porcelain crucible, pre-fire at 900°C for 9 hours in an oxygen atmosphere, cool and grind them, and then fire at a high temperature of 1380°C for 6 hours. After pulverizing and sieving, the fluorescent powder was dispersed in an acetone medium, classified by fluid sedimentation separation technology, and dried to obtain a material with a central particle diameter of 4.0 μm. Under the excitation of 300nm-500nm light (especially 400nm and 470nm), it presents an emission spectrum of 630nm-680nm. The peak wavelength is 647.

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Abstract

This invention relates to a fluorescent powder which can emit red light by the radiation of ultraviolet light and blue light LED, with the general formula AMaOb:Mnx,Ry, wherein A is the combination of 1-3 elements of Mg, Ca, Sr, Ba, and Zn; M is the combination of 1-3 elements of Al, Ga, Y, and Gd; R is the combination of 1-3 elements of Ce, Pr, Nd, Sm, Td, Dy, Ho, Er, Tm and Cu; 0.9 C09K 11 / 78 H05B 33 / 14 2 9 1 2005 / 6 / 14 1880404 2006 / 12 / 20 000000000 Dalian Luming Light Science & Technology Co., Ltd. Dalian 116025 Liu Lifang Xia Wei Yu Jingjie Luo Xixian Xiao Zhiguo

Description

technical field [0001] The invention relates to a fluorescent powder which can be excited by ultraviolet light and blue light LED to emit red light and a manufacturing method thereof. (C09K11 / 77 H05B33 / 02) technical background [0002] The LED that came out in the 1960s has achieved rapid development in just over 30 years, especially the successful development of white LED in 1998, which made the application of LED take a substantial step from the simple sign display function to the lighting function. [0003] At present, white light LEDs generally use blue light-emitting LEDs superimposed with yellow-emitting yttrium aluminum garnet (YAG) phosphors excited by blue light to synthesize white light. Because its luminous spectrum only contains two main waves of blue and yellow, and lacks red light components, there are problems of high color temperature and low color rendering index, which do not meet the requirements of general lighting. Since the h...

Claims

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Application Information

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IPC IPC(8): C09K11/78H05B33/14
Inventor 刘丽芳夏威于晶杰罗昔贤肖志国
Owner DALIAN LUMINGLIGHT SCIENCE & TECHNOLOGY CO LTD
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