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High-thermal-stability fluorescent ceramic for white LED/LD and preparation method thereof

A high thermal stability, fluorescent ceramic technology, applied in electrical components, circuits, semiconductor devices, etc., can solve the problems of temperature quenching, thermal stability deterioration of fluorescent ceramics, etc., to eliminate lattice distortion, improve service performance, improve The effect of thermal stability

Active Publication Date: 2020-07-10
XUZHOU ALL TO PHOTOELECTRIC TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The above method has its own advantages, but the disadvantages are also obvious, that is, the thermal stability of fluorescent ceramics becomes poor, and temperature quenching is very easy to occur.

Method used

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  • High-thermal-stability fluorescent ceramic for white LED/LD and preparation method thereof
  • High-thermal-stability fluorescent ceramic for white LED/LD and preparation method thereof
  • High-thermal-stability fluorescent ceramic for white LED/LD and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] Embodiment 1: preparation chemical formula is (Gd 0.06 Y 0.938 Ce 0.002 ) 3 (Al 0.4 sc 0.6 ) 2 Al 3 o 12 Fluorescent Ceramics

[0036] (1) Set the target product quality as 60g, according to the chemical formula (Gd 0.06 Y 0.938 Ce 0.002 ) 3 (Al 0.4 sc0.6 ) 2 al 3 o 12 The stoichiometric ratio of each element in takes aluminum oxide (18.515g), yttrium oxide (30.365g), gadolinium oxide (3.118g), scandium oxide (7.908g) and cerium oxide (0.99g) respectively as raw material powder; Mix raw material powder, 0.00156g tetraethyl orthosilicate, 0.0078g PEI, and 120ml of absolute ethanol, add 120g of alumina balls with a diameter of 1mm, and perform ball milling in an alumina ball mill tank with a ball milling speed of 180r / min and a ball milling time of 25h ;

[0037] (2) Put the mixed slurry after ball milling in step (1) in a blast drying oven at 50°C for 10 hours, and pass the dried mixed powder through an 80-mesh sieve, sieve it 5 times, and then calcinate...

Embodiment 2

[0047] Embodiment 2: preparation chemical formula is (Gd 0.07 Y 0.928 Ce 0.002 ) 3 (Al 0.3 sc 0.7 ) 2 al 3 o 12 Fluorescent Ceramics

[0048] (1) Set the target product mass to 60g, weigh alumina (17.384g), yttrium oxide (29.773g), gadolinium oxide (3.605g), and scandium oxide (9.144g) respectively according to the stoichiometric ratio of each element in the chemical formula and cerium oxide (0.098g) as the raw material powder; mix the raw material powder, 0.00234g ethyl orthosilicate, 0.00936g PEI, 130ml absolute ethanol, add 150g of alumina balls with a diameter of 2mm, and carry out the process in an alumina ball mill tank Ball milling, the ball milling speed is 190r / min, and the ball milling time is 22h;

[0049] (2) Put the mixed slurry after ball milling in step (1) into a blast oven at 55°C and dry for 15 hours. The dried mixed powder is passed through a 90-mesh sieve, sieved 4 times, and then calcined in an air atmosphere to remove residual For organic matter...

Embodiment 3

[0059] Embodiment 3: preparation chemical formula is (Gd 0.075 Y 0.922 Ce 0.003 ) 3 (Al 0.25 sc 0.75 ) 2 al 3 o 12 Fluorescent Ceramics

[0060] (1) Set the target product mass to 60g, weigh alumina (16.822g), yttrium oxide (29.442g), gadolinium oxide (3.845g), and scandium oxide (9.751g) respectively according to the stoichiometric ratio of each element in the chemical formula and cerium oxide (0.146g) as the raw material powder; the raw material powder, 0.00312g tetraethyl orthosilicate, 0.0156gPEI, 150ml absolute ethanol are mixed, and a diameter of 5mm is added to the alumina ball 180g, and the grinding process is carried out in an alumina ball mill tank. Ball milling, the ball milling speed is 200r / min, and the ball milling time is 25h;

[0061] (2) Put the mixed slurry after ball milling in step (1) in a blast drying oven at 60°C for 20 hours, and pass the dried mixed powder through a 100-mesh sieve, sieve 3 times, and then calcine in an air atmosphere to remove...

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Abstract

The invention discloses a high-thermal-stability fluorescent ceramic for white light LED / LD and a preparation method of the fluorescent ceramic. The chemical formula of the fluorescent ceramic is shown in the specification: (GdzCexY1-X-Z)3(ScyAl1-Y)2Al3O12, wherein x is the molar percentage of Ce<3+> doped Y<3+> sites, y is the molar percentage of Sc<3+> doped octahedron Al <3+> sites, z is the molar percentage of Gd<3+> doped Y<3+> sites, x is greater than 0 and less than or equal to 0.02, y is greater than or equal to 0.6 and less than or equal to 0.8, and y: z is 10: 1. The transparent fluorescent ceramic material disclosed by the invention has an emission spectrum main peak of 520-540nm and a full width at half maximum of 80-90nm. Under the excitation of a high-power blue light LED (350-500mA) or a blue light LD (4W-10W), warm white light to light green light emission is realized, the color temperature is 2800-6500K, and the luminous intensity is attenuated by 5%-10% at 150 DEG C.The prepared ceramic is simple in process and easy for industrial production.

Description

technical field [0001] The invention relates to the technical field of fluorescent ceramics, in particular to a fluorescent ceramic with high thermal stability for white light LED / LD and a preparation method thereof. Background technique [0002] Global problems such as energy crisis, climate warming, and ecological environment pollution have made the environmental protection and energy-saving industry widely valued at home and abroad. In the field of semiconductor lighting, white LEDs, as a new generation of green solid-state lighting sources, have unparalleled competitive advantages due to their high luminous efficiency, small device size, and long service life. With the development of society and the improvement of quality of life, people are more keen on pursuing high-power, high-quality and healthy green lighting sources. Therefore, the traditional phosphor Ce 3+ :Y 3 Al 5 o 12 The method of mixing (Ce:YAG) with organic silica gel is gradually being replaced by the...

Claims

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Application Information

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IPC IPC(8): C04B35/505C04B35/622C04B35/63H01L33/50
CPCC04B35/505C04B35/622C04B35/6303H01L33/502C04B2235/3224C04B2235/3217C04B2235/3229C04B2235/602C04B2235/656C04B2235/6567C04B2235/6562C04B2235/6565C04B2235/6581C04B2235/662C04B2235/608C04B2235/77H01L2933/0041
Inventor 张乐马跃龙孙炳恒康健邵岑陈东顺周天元黄国灿李明陈浩
Owner XUZHOU ALL TO PHOTOELECTRIC TECH CO LTD
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