Fluorescent ceramic with high thermal stability and high quantum efficiency for white LED/LD and preparation method thereof

A technology of high thermal stability, fluorescent ceramics, applied in chemical instruments and methods, luminescent materials, etc., can solve the problems of difficult to accurately control concentration, thermal stability and quantum efficiency decline of fluorescent ceramics, etc., to improve coordination complexity, improve Luminescence thermal stability, high quantum efficiency effect

Active Publication Date: 2021-01-01
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

However, the disadvantages are also obvious. It is difficult to accurately control the concentration of added ions to form a pure garnet phase, and impurity phases are often generated, so the thermal stability and quantum efficiency of the corresponding fluorescent ceramics are significantly reduced.

Method used

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  • Fluorescent ceramic with high thermal stability and high quantum efficiency for white LED/LD and preparation method thereof
  • Fluorescent ceramic with high thermal stability and high quantum efficiency for white LED/LD and preparation method thereof
  • Fluorescent ceramic with high thermal stability and high quantum efficiency for white LED/LD and preparation method thereof

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0041] Embodiment 1: preparation chemical formula is (Lu 0.596 Y 0.4 Ce 0.004 ) 3 (Al 0.4 sc 0.6 ) 2 Al 3 o 12 Fluorescent Ceramics

[0042] (1) Set the target product quality as 60g, according to the chemical formula (Lu 0.594 Y 0.4 Ce 0.006 ) 3 (Al 0.2 sc 0.8 ) 2 Al 3 o 12 The stoichiometric ratio of each element in α-alumina (15.25g), yttrium oxide (10.55g), lutetium oxide (27.73g), scandium oxide (6.40g) and cerium oxide (0.16g) were weighed as raw material powder ; Mix the raw material powder and 120ml of absolute ethanol, add 210g of alumina balls with a diameter of 0.5mm, and perform ball milling in an alumina ball mill tank, the ball milling speed is 170r / min, and the ball milling time is 40h;

[0043] (2) Put the mixed slurry after ball milling in step (1) into a blast drying oven at 60° C. for 10 hours, and pass the dried mixed powder through a 50-mesh sieve for 6 times.

[0044] (3) putting the calcined powder in step (2) into an abrasive tool for ...

Embodiment 2

[0053] Embodiment 2: preparation chemical formula is (Lu 0.385 Y 0.6 Ce 0.015 ) 3 (Al 0.2 sc 0.8 ) 2 Al 3 o 12 Fluorescent Ceramics

[0054] (1) Set the target product quality as 60g, according to the chemical formula (Lu 0.385 Y 0.6 Ce 0.015 ) 3 (Al 0.2 sc 0.8 ) 2 Al 3 o 12 The stoichiometric ratio of each element in α-alumina (14.36g), yttrium oxide (16.84g), lutetium oxide (19.04g), scandium oxide (9.14g) and cerium oxide (0.64g) were weighed as raw material powder ; Mix the raw material powder and 180ml of absolute ethanol, add 270g of alumina balls with a diameter of 2mm, and perform ball milling in an alumina ball mill tank, the ball milling speed is 190r / min, and the ball milling time is 25h;

[0055] (2) Dry the mixed slurry after ball milling in step (1) in a blast drying oven at 70°C for 10 hours, and pass the dried mixed powder through a 150-mesh sieve for 4 times.

[0056] (3) putting the calcined powder in step (2) into an abrasive tool for dry p...

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Abstract

The invention discloses a fluorescent ceramic with high thermal stability and high quantum efficiency for white LED / LD and a preparation method thereof. The chemical formula of the fluorescent ceramicis (YyCezLu1ze) 3 (ScxAl1x) 2Al3O12, wherein z is the molar percentage of Ce < 3 + > doped Lu < 3 + >, y is the molar percentage of Y < 3 + > doped Lu < 3 + >, and x is the molar percentage of Sc < 3+ > doped octahedral Al < 3 + >. The transparent fluorescent ceramic material provided by the invention has an emission spectrum main peak of 520-550 nm and a full width at half maximum of 90-110 nm.Under the excitation of a high-power blue light LED (350-500mA) or a blue light LD (2W-10W), the emission from green light to green yellow light is realized, the color temperature is 4000-10000K, theluminous intensity is attenuated by 2%-5% at 150 DEG C, and the internal quantum efficiency is 82%-88%. 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 and high quantum efficiency for white light LED / LD and a preparation method thereof. Background technique [0002] Fluorescent conversion white light-emitting diodes and laser diodes (LED / LD for short), as a new generation of solid-state lighting sources, are widely used because of their high luminous efficiency, good robustness, small device size and long service life. Follow and study. With the upgrading of technology, the phosphor Ce 3+ :Y 3 Al 5 o 12 (abbreviation: Ce:YAG) mixed with organic silica gel is gradually being replaced by the remote excitation packaging method of excitation source and Ce:YAG fluorescent ceramics. As the core material for color conversion, Ce:YAG fluorescent ceramics has become a research hotspot at home and abroad due to its high thermal conductivity, good mechanical properties, s...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/44C04B35/50C09K11/80C04B35/64
CPCC04B35/44C04B35/50C09K11/7774C04B35/64C04B2235/9646C04B2235/3225C04B2235/3224C04B2235/3229C04B2235/3217C04B2235/608C04B2235/77C04B2235/6562C04B2235/6565C04B2235/663Y02B20/00
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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