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A kind of sialon fluorescent transparent ceramics for high-power warm white solid-state lighting and preparation method thereof

A technology of solid-state lighting and transparent ceramics, applied in energy-saving lighting, chemical instruments and methods, luminescent materials, etc., can solve the problems that it is difficult to guarantee the elimination of glass phase, the density is only 90%, and the reduction of glass phase, so as to reduce the intergranular Effect of glass phase content, light scattering reduction, and good thermal conductivity

Active Publication Date: 2021-11-12
ANHUI UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

In 2013, Y.J.Park et al prepared Ca-α-sialon:Eu with different components by pressure sintering at 1800-2000°C 2+ fluorescent ceramics, but the highest density of the sample is only 90% [J.Kor.Ceram.Soc.,2013,50 4 280-287]
In 2002, J.Krevel et al prepared (Ca 0.3125 Ce 0.209 )-α-sialon fluorescent transparent ceramics, but Ca-α-sialon:Eu 2+ Fluorescent transparent ceramics have not been reported [J.Solid State Chem.,2002,165 19-24]
Although the patent (CN201510174020.5) has disclosed Ca-α-sialon:Eu 2+ A method for preparing fluorescent transparent ceramics, but this patent uses a conventional ratio, which is difficult to ensure that most of the glass phase is eliminated
The patent (CN201110178303.9) discloses adding additional nitrides on the basis of the conventional ratio to reduce the glass phase and obtain Ca 2+ The preparation method of stable α-sialon translucent ceramics, but there is no report on the addition of rare earth luminescent ions to obtain luminescent properties

Method used

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  • A kind of sialon fluorescent transparent ceramics for high-power warm white solid-state lighting and preparation method thereof
  • A kind of sialon fluorescent transparent ceramics for high-power warm white solid-state lighting and preparation method thereof
  • A kind of sialon fluorescent transparent ceramics for high-power warm white solid-state lighting and preparation method thereof

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] α-Si with an oxygen content of 1.5wt% 3 N 4 , AlN with an oxygen content of 1.0 wt%, α-Al 2 o 3 , CaCO 3 and Eu 2 o 3 as raw material, according to Ca m / 2-x-yv / 2 Si 12-m-n al m+n o n N 16-n :xEu 2+ ,y M v+ The stoichiometric ratio of (m=0.8, n=1.0, x=0.02, y=0) selects the above-mentioned raw materials with a total weight of 50 g, mixes them, and adds 2.5 g of AlN to the mixture, and puts the above-mentioned raw materials in a plastic bottle mixed with Si 3 N 4 The ball is the ball milling medium, the mass ratio of the ball to the material is 4:1, add 400ml of absolute ethanol, and roll the ball mill for 24 hours to obtain the slurry; the slurry is evaporated to dryness in a rotary evaporator at 60°C, and then put into a vacuum drying oven to vacuum Dry for at least 24 hours, then take it out, grind for 20 minutes, and pass through a 100-mesh sieve to obtain the undersize; put the sieved undersize into a graphite mold with a diameter of 48 mm, then put it ...

Embodiment 2

[0036] α-Si with an oxygen content of 1.5wt% 3 N 4 , AlN with an oxygen content of 1.0 wt%, α-Al 2 o 3 , CaCO 3 、Eu 2 o 3 and Y 2 o 3 as raw material, according to Ca m / 2-x-yv / 2 Si 12-m-n al m+n o n N 16-n :xEu 2+ ,y M v+The stoichiometric ratio of (m=0.8, n=1.0, x=0.02, y=0.05) selects the above-mentioned raw materials with a total weight of 50 g, and additionally adds 20 g of AlN to the mixture, mixes the above-mentioned raw materials in a plastic bottle, and Si 3 N 4 The ball is the ball milling medium, the ball-to-material ratio is 4:1, add 400ml of absolute ethanol, and roll the ball mill for 24 hours to obtain the slurry; the slurry is evaporated to dryness in a rotary evaporator at 60°C, and then placed in a vacuum drying oven for vacuum drying At least 24 hours, then take it out, grind for 20min, and pass through a 100-mesh sieve to obtain the undersize; put the sieved undersize into a graphite mold with a diameter of 48mm, and then put it into a hot-pr...

Embodiment 3

[0039] α-Si with an oxygen content of 1.5wt% 3 N 4 , AlN with an oxygen content of 1.0 wt%, α-Al 2 o 3 , CaCO 3 、Eu 2 o 3 and Sc 2 o 3 as raw material, according to Ca m / 2-x-yv / 2 Si 12-m-n al m+n o n N 16 -n:xEu 2+ ,y M v+ The stoichiometric ratio of (m=1.6, n=2.0, x=0.04, y=0.03) is selected as a total weight of 50 g of the above raw materials, and an additional 16 g of Si is added to the mixture 3 N 4 and 4gAlN complex, mix the above raw materials in a plastic bottle, and use Si 3 N 4 The ball is the ball milling medium, the ball-to-material ratio is 4:1, add 400ml of absolute ethanol, and roll the ball mill for 24 hours to obtain the slurry; the slurry is evaporated to dryness in a rotary evaporator at 60°C, and then placed in a vacuum drying oven for vacuum drying At least 24 hours, then take it out, grind for 20min, and pass through a 100-mesh sieve to obtain the undersize; put the sieved undersize into a graphite mold with a diameter of 48mm, and then pu...

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Abstract

The present invention involves a high -power warm white light solid lighting and the preparation method of SIALON fluorescent transparent ceramics and its preparation. This method includes the following steps: according to the general CA m / 2‑x‑yv / 2 SI 12‑m‑n AL m+ n O n N 16‑n : xeu 2+ , ym v+ , Of which V is the combined price, 0.8≤m≤2.0, 1.0 ≤ n.0, 0 <x ≤m / 4, 0 ≤ m / 2v‑2x / v, select α‑si according to the above general formula 3 N 4 , Aln, α 、al 2 O 3 , CACO 3 , EU 2 O 3 With the raw materials containing M, you get a mixture A, and then add a mixture B and mix. 3 N 4 The mixture of the mixture: the quality of the mixture B is 5-50WT % of the mass A quality, and the SI in the mixture B 3 N 4 The weight ratio to Aln is 0 to 5: 1, the ball grinds and dry, and uses hot -press sintering or discharged plasma sintering to obtain a sarcasm; 570‑600nm and the wavelength can be adjusted CA‑α‑sialon: EU 2+ Fluorescent transparent ceramics. The invention is simple, can be repetitive, and has a high heat guidance rate of fluorescent transparent ceramic, excellent thermal ham, and is suitable for high -power warm white light solid lighting.

Description

technical field [0001] The invention relates to a SiAlON fluorescent transparent ceramic for high-power warm white solid-state lighting and a preparation method thereof, belonging to the field of rare earth luminescent materials and solid-state lighting preparation. Background technique [0002] Solid-state lighting has the advantages of energy saving and environmental protection, high luminous efficiency, long life, high reliability, and small size. It is the green light source with the most development potential. White LED lighting is currently the mainstream of solid-state lighting, and the combination of "blue LED chip + yellow phosphor" is the most common way to achieve white LED lighting. However, the further development of high-power white LEDs is limited by the epoxy resin or silicone encapsulation materials used, which are prone to aging, poor high temperature resistance, and the resulting decrease in LED luminous efficacy, color shift, and shortened lifespan. Ther...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B35/584C04B35/622C04B35/626C09K11/77
CPCC04B35/584C04B35/622C04B35/62605C04B2235/3208C04B2235/3217C04B2235/3224C04B2235/3865C04B2235/6562C04B2235/6567C04B2235/9653C09K11/7728Y02B20/00
Inventor 杨章富徐刘鑫王燕王金梅花清照戴紫阳
Owner ANHUI UNIV OF SCI & TECH