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Garnet-based fluorescent material and preparation method thereof

A fluorescent material, garnet-based technology, applied in the field of fluorescent materials, can solve the problems of complex preparation methods, low yield, poor stability, etc., and achieve the effects of reducing energy consumption, improving transparency, and high stability

Pending Publication Date: 2020-09-29
安徽晶宸科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The garnet-based fluorescent materials produced in the prior art usually have defects such as poor stability and brittleness. The preparation methods of the existing garnet-based fluorescent materials are complicated and the yield is low.

Method used

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  • Garnet-based fluorescent material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] A garnet-based fluorescent material has a composition of the following chemical formula:

[0033] Ce 3 Al 4.8 Ga 0.2 o 12 :Tb 3

[0034] A method for preparing a garnet-based fluorescent material, comprising the following steps:.

[0035] 1), weighing raw materials: weighing 7 parts of Ce-containing compound, 9 parts of Al 2 o 3 , 0.5 parts of Ga-containing chemicals, 0.6 parts of Tb-containing compounds, 3 parts of MgO 2 , and stir and mix evenly to obtain a mixture;

[0036] 2) High-temperature calcination: put the mixture into the calcination furnace, and calcine at 850°C for 3 hours;

[0037] 3) Raw material washing: wash the raw material calcined in step 2 with deionized water, and dry at 105° C. for 5.5 hours using a dryer;

[0038] 4) Roasting of raw materials: Add the washed and dried raw materials into a roasting furnace, and roast them at 1550°C for 2 hours. After the roasting is completed, stand still in the roasting furnace for 0.75 hours. During t...

Embodiment 2

[0041] A garnet-based fluorescent material has a composition of the following chemical formula:

[0042] Ce 3 Al 4.8 Ga 0.2 o 12 : Eu 3

[0043] A method for preparing a garnet-based fluorescent material, comprising the following steps:.

[0044] 1), weighing raw materials: weighing 6 parts of Ce-containing compound, 7 parts of Al 2 o 3, 0.2 parts of Ga-containing chemicals, 0.5 parts of Eu-containing compounds, 2 parts of CaO, and stirred and mixed evenly to obtain a mixture;

[0045] 2) High-temperature calcination: add the mixture into the calcination furnace, and calcine at 800°C for 2 hours;

[0046] 3) Raw material washing: wash the raw material calcined in step 2 with deionized water, and dry at 100° C. for 5 hours using a dryer;

[0047] 4) Roasting of raw materials: Add the washed and dried raw materials into a roasting furnace, and roast at 1500°C for 1.5 hours. After the roasting is completed, stand still in the roasting furnace for 0.5 hours. During this p...

Embodiment 3

[0050] A garnet-based fluorescent material has a composition of the following chemical formula:

[0051] Ce 3 al 4.8 Ga 0.2 o 12 : Dy 3

[0052] A method for preparing a garnet-based fluorescent material, comprising the following steps:.

[0053] 1), weighing raw materials: weighing 8 parts of Ce-containing compound, 11 parts of Al 2 o 3 , 0.9 parts of Ga-containing chemicals, 0.8 parts of Dy-containing compounds, 5 parts of MgO 2 , and stir and mix evenly to obtain a mixture;

[0054] 2) High-temperature calcination: add the mixture into the calcination furnace, and calcine at 900°C for 4 hours;

[0055] 3) Raw material washing: wash the raw material calcined in step 2 with deionized water, and dry at 110° C. for 6 hours using a dryer;

[0056] 4) Roasting of raw materials: Add the washed and dried raw materials into the roasting furnace, and roast at 1600 ° C for 2.5 hours. After the roasting is completed, stand still in the roasting furnace for 1 hour, and nitroge...

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Abstract

The invention relates to the technical field of fluorescent materials, and particularly discloses a garnet-based fluorescent material and a preparation method thereof. The composition of the garnet-based fluorescent material is as described by the chemical formula A<3>Al<5-z>GaZO<12>: X<3>, wherein A<3>Al<5-z>GaZO<12> is used as a matrix; X is an activating agent; A is a rare earth element; X is one or more selected from a group consisting of Tb, Eu and Dy; and Z is greater than 0.1 and smaller than 0.5. The garnet-based fluorescent material prepared by the method has excellent properties including high stability, high transparency, difficulty in embrittlement and the like; and the preparation method of the garnet-based fluorescent material is simple in process and high in yield.

Description

technical field [0001] The invention relates to the technical field of fluorescent materials, in particular to a garnet-based fluorescent material and a preparation method thereof. Background technique [0002] White light LED is a common semiconductor device that converts electrical energy into visible light. It has the advantages of non-toxicity, long life, high efficiency and energy saving, solid state, low working voltage, strong shock resistance and good safety. In the process of making white light LEDs, the basic operations are all related to phosphor powder, so when making white light LEDs, the phosphor powder must be carefully studied. Phosphor is a very critical material, and its performance directly affects the brightness, color coordinates, color temperature and color rendering of white LEDs. Garnet is a very important class of inorganic materials, widely used in the field of fluorescent materials. [0003] The vast majority of garnet-based fluorescent materials...

Claims

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Application Information

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IPC IPC(8): C09K11/80
CPCC09K11/7787C09K11/7769
Inventor 马孙明彭方郭玉勇窦仁勤毛炯陈仪翔张庆礼
Owner 安徽晶宸科技有限公司
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