High-color-rendering-index and high-luminous-efficiency complex-phase fluorescent ceramic for LED/LD illumination, and preparation method thereof

A technology of fluorescent ceramics and high light efficiency, which is applied in energy-saving lighting, chemical instruments and methods, and luminescent materials. effective effect

Active Publication Date: 2020-04-24
XUZHOU NORMAL UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The preparation process of transparent ceramics in CN 107651955 A is relatively cumbersome, which is not conducive to industrial production

Method used

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  • High-color-rendering-index and high-luminous-efficiency complex-phase fluorescent ceramic for LED/LD illumination, and preparation method thereof
  • High-color-rendering-index and high-luminous-efficiency complex-phase fluorescent ceramic for LED/LD illumination, and preparation method thereof
  • High-color-rendering-index and high-luminous-efficiency complex-phase fluorescent ceramic for LED/LD illumination, and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] Embodiment 1: prepare 0.9 (Ce 0.005 Y 0.995 ) 3 Al 5 o 12 -0.1 (Eu 0.02 Y 0.98 ) 2 o 3 Composite fluorescent ceramics

[0035] (a) Set the target product quality as 60g, according to (Ce 0.005 Y 0.995 ) 3 Al 5 o 12 Each element stoichiometric ratio in weighs 32.62g of yttrium oxide, 24.67g of aluminum oxide, 0.25g of cerium oxide as raw material to prepare main phase Ce:YAG;

[0036] (b) Mix the raw material powder, 0.3g of polyetherimide, and 60ml of absolute ethanol, add 300g of alumina balls with a diameter of 0.2mm, and carry out planetary ball milling in a nylon ball milling tank at a ball milling speed of 200r / min. The time is 14 hours; the mixed slurry after ball milling is put into a blast drying oven at 55°C and dried for 5 hours, and the dried mixed powder is passed through a 150-mesh sieve, sieved 6 times, and then placed in a muffle furnace for calcination at a temperature of 800°C, holding time 3h, to remove residual organic matter;

[0037] ...

Embodiment 2

[0042] Embodiment 2: prepare 0.8 (Ce 0.007 Y 0.993 ) 3 Al 5 o 12 -0.2 (Eu 0.02 Y 0.98 ) 2 o 3 Composite fluorescent ceramics

[0043] (a) Set the target product quality as 60g, according to (Ce 0.007 Y 0.993 ) 3 Al 5 o 12 Each element stoichiometric ratio in weighs 30.96g of yttrium oxide, 23.46g of aluminum oxide, 0.33g of cerium oxide as raw material to prepare main phase Ce:YAG;

[0044] (b) Mix the raw material powder, 0.5g of polyetherimide, and 100ml of absolute ethanol, add 120g of alumina balls with a diameter of 5mm, and carry out planetary ball milling in a nylon ball mill tank with a ball milling speed of 150r / min and a ball milling time 30h; put the mixed slurry after ball milling into a blast drying oven at 70°C to dry for 10h, and pass the dried mixed powder through a 300-mesh sieve, sieve 10 times, and then place it in a muffle furnace for calcination at a temperature of 900 ℃, holding time 6h, to remove residual organic matter;

[0045] (c) Put t...

Embodiment 3

[0050] Embodiment 3: prepare 0.8 (Ce 0.02 Y 0.98 ) 3 Al 5 o 12 -0.2 (Eu 0.01 Y 0.99 ) 2 o 3 Composite fluorescent ceramics

[0051] (a) Set the target product quality as 60g, according to (Ce 0.02 Y 0.98 ) 3 Al 5 o 12 The stoichiometric ratio of each element in the method takes 30.45g of yttrium oxide, 23.40g of aluminum oxide, and 0.94g of cerium oxide as raw materials to prepare the main phase Ce:YAG;

[0052] (b) Mix the raw material powder, 0.4g of polyetherimide, and 75ml of absolute ethanol, add 180g of alumina balls with a diameter of 0.5mm, and carry out planetary ball milling in a nylon ball mill tank at a ball milling speed of 170r / min. The time is 17 hours; the mixed slurry after ball milling is put into a blast drying oven at 58°C to dry for 7 hours, and the dried mixed powder is passed through a 200-mesh sieve, sieved 7 times, and then calcined in a muffle furnace at a temperature of 800°C, holding time 5h, to remove residual organic matter;

[0053] ...

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Abstract

The invention discloses a high-color-rendering-index and high-luminous-efficiency complex-phase fluorescent ceramic for LED/LD illumination, and a preparation method thereof. The chemical general formula of the complex-phase fluorescent ceramic is a(CexY1-x)3Al5O12-b(EuyY1-y)2O3 or c(CexY1-x)3Al5O12-dEuzSr1-zAlSi4N7. The preparation method comprises the following steps: preparing Ce:YAG fluorescent powder, mixing and ball-milling the Ce:YAG fluorescent powder, commercial Y2O3:Eu<3+> powder or commercial SrAlSi4N7:Eu<2+> powder, a dispersing agent and anhydrous ethanol according to a certain ratio, and drying and sieving a mixed slurry obtained by ball-milling; and calcining the sieved powder, carrying out spark plasma sintering, cooling to room temperature, and carrying out double-sided polishing treatment to obtain the complex-phase fluorescent ceramic. The complex-phase fluorescent ceramic material emits low-color-temperature high-color-rendering-index white light under the excitation of an LED (300-500 mA)/LD (2-10 W), the main emission peaks are 530-550 nm and 600-640 nm, the relative color temperature is 2500-3700 K, the color rendering index is 80 to 88, and the visual luminous efficiency can reach 290-350 lm/W. The complex-phase fluorescent ceramic is simple in preparation process and easy for industrial production.

Description

technical field [0001] The invention relates to a fluorescent ceramic, in particular to a composite fluorescent ceramic with high CRI and high light efficiency for LED / LD lighting and a preparation method thereof, belonging to the technical field of inorganic luminescent materials. Background technique [0002] The new solid-state lighting device prepared with LED / LD as the excitation source has many advantages such as green energy saving, fast response, resistance to harsh environments, simple structure, small size, light weight and good safety, and can replace traditional xenon lamps and high-pressure sodium lamps. , has unparalleled energy-saving advantages, and has been widely used in solid-state lighting, automotive headlights, road lighting and other fields. In this field, the main means of obtaining white light is based on blue light (440nm ~ 460nm) LED / LD chip with organic resin packaged Ce 3+ :Y 3 Al 5 o 12 (Ce:YAG) phosphor. Because high-power LED / LD chips wil...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/505C04B35/622C04B35/63C09K11/77
CPCC04B35/505C04B35/622C04B35/6303C09K11/7792C04B2235/3217C04B2235/3229C04B2235/656C04B2235/6567C04B2235/6562C04B2235/6565C04B2235/3224C04B2235/3213C04B2235/3873C04B2235/3852C04B2235/666C04B2235/658C04B2235/5445C04B2235/5454Y02B20/00
Inventor 张乐黄今马跃龙邵岑康健黄国灿李明陈浩
Owner XUZHOU NORMAL UNIVERSITY
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