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YAG (yttrium aluminum garnet)-type fluorescent powder, preparation method of YAG-type fluorescent powder, YAG-type transparent ceramic fluorescent body prepared from YAG-type fluorescent powder and application of YAG-type transparent ceramic fluorescent body

A technology of transparent ceramics and phosphors, which is applied in the field of ceramic materials, can solve the problems of lack of red light components of phosphors and low overall light efficiency, and achieve good stability and anti-light decay performance, high color rendering index and luminous efficiency, Improve the effect of low color rendering index

Inactive Publication Date: 2017-11-24
FUJIAN INST OF RES ON THE STRUCTURE OF MATTER CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] The present invention aims at the lack of red light components of phosphors in the prior art and the problem of low overall light efficiency. Firstly, YAG:Ce is synthesized in a reducing atmosphere. 3+ ,Mn 2+ , M 4+ Phosphor powder, where Mn 2+ Ribbon-shaped red spectrum can be produced by energy transfer

Method used

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  • YAG (yttrium aluminum garnet)-type fluorescent powder, preparation method of YAG-type fluorescent powder, YAG-type transparent ceramic fluorescent body prepared from YAG-type fluorescent powder and application of YAG-type transparent ceramic fluorescent body
  • YAG (yttrium aluminum garnet)-type fluorescent powder, preparation method of YAG-type fluorescent powder, YAG-type transparent ceramic fluorescent body prepared from YAG-type fluorescent powder and application of YAG-type transparent ceramic fluorescent body
  • YAG (yttrium aluminum garnet)-type fluorescent powder, preparation method of YAG-type fluorescent powder, YAG-type transparent ceramic fluorescent body prepared from YAG-type fluorescent powder and application of YAG-type transparent ceramic fluorescent body

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0072] Example 1 Preparation of YAG-type phosphor sample P01 and YAG-type transparent ceramic phosphor C1

[0073] Using yttrium oxide (Y) with a purity of 99.9% 2 o 3 ), alumina (Al 2 o 3 ), cerium oxide (CeO 2 ), manganese monoxide (MnO), silicon dioxide (SiO 2 ) powder, press Y 2.97 Al 4.85 o 12 :0.03Ce 3+ ,0.075Mn 2+ ,0.075Si 4+ Composition Prepare a total of 50g of raw materials, put the powder in the same container; add 25g of acetone to the container containing the powder, stir the mixed powder thoroughly through mechanical stirring, and place the mixed slurry in a rotary evaporator to evaporate quickly Remove acetone, dry in a drying oven at 80°C for 5 hours and then sieve; put the sieved mixture into a crucible, 2 / H 2 (Volume ratio 90:10) atmosphere, in a tube furnace, first raise the temperature to 1000°C at a heating rate of 10°C / min, then raise the temperature to 1450°C at a heating rate of 5°C / min, react for 5 hours and then cool naturally , that is,...

Embodiment 2

[0075] Example 2 Preparation of YAG-type phosphor sample P02 and YAG-type transparent ceramic phosphor C2

[0076] Using yttrium oxide (Y) with a purity of 99.9% 2 o 3 ), aluminum hydroxide (Al(OH) 3 ), cerium oxide (CeO 2 ), manganese acetate (Mn(C 2 h 3 o 2 ) 2 ), zirconium dioxide (ZrO 2 ) powder, press Y 2.94 Al 4.8 o 12 : 0.06Ce 3+ ,0.1Mn 2+ ,0.1Zr 4+ Composition Prepare a total of 50g of raw materials, put the powder in the same container; add 50g of ethanol to the container containing the powder, mix the powder thoroughly through mechanical stirring, and place the mixed slurry in a rotary evaporator to evaporate quickly Remove the solvent, dry in a drying oven at 80°C for 5 hours and then sieve; put the sieved mixture into a crucible, and put it under flowing N 2 / H 2(Volume ratio is 85:15) atmosphere, in a tube furnace, first raise the temperature to 1000°C at a heating rate of 10°C / min, then raise the temperature to 1500°C at a heating rate of 5°C / min, ...

Embodiment 3

[0078] Example 3 Preparation of YAG-type phosphor sample P03 and YAG-type transparent ceramic phosphor C3

[0079] Using lutetium nitrate (Lu(NO) with a purity of 99.9% 3 ) 3 ), aluminum nitrate (Al(NO 3 ) 3 ), cerium oxide (CeO 2 ), manganese carbonate (MnCO 3 ), titanium dioxide (TiO 2 ) powder, press Y 2.91 Al 4.7 o 12 : 0.09Ce 3+ ,0.15Mn 2+ ,0.15Ti 4+ Composition Prepare a total of 50g of raw materials, put the powder in the same container; add 50g of ether to the container containing the powder, stir the mixed powder thoroughly through mechanical stirring, and place the mixed slurry in a rotary evaporator to evaporate quickly. Remove the solvent, dry in a drying oven at 80°C for 5 hours and then sieve; put the sieved mixture into a crucible, and put it under flowing N 2 / H 2 (Volume ratio 85:15) atmosphere, in a tube furnace, first raise the temperature to 1000°C at a heating rate of 10°C / min, then raise the temperature to 1550°C at a heating rate of 5°C / min,...

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Abstract

The application discloses YAG (yttrium aluminum garnet)-type fluorescent powder and preparation method thereof. The YAG-type fluorescent powder comprises R(3-x)Al(5-2y)O12:xCe<3+>, yMn<2+> and yM<4+>, wherein R is selected from at least one of rare earth elements; M<4+> is a valence state compensation ion; x is equal to 0.005-0.2; and y is equal to 0.05-0.4. The preparation method comprises the following steps: mixing all the materials into an organic solvent; calcining in the reducing atmosphere, so as to obtain the YAG-type fluorescent powder. High-quality white light with soft color and high color rendering index can be generated by a YAG-type fluorescent transparent ceramic prepared from the YAG-type fluorescent powder instead of fluorescent powder and an organic resin or silica gel encapsulating material in the existing white light LED (light-emitting diode), and an encapsulating structure, the lighting effect and the stability of an LED light source can be globally optimized.

Description

technical field [0001] The application relates to a YAG-type phosphor and a preparation method thereof, a YAG-type transparent ceramic phosphor prepared by the same and its application, belonging to the field of ceramic materials. Background technique [0002] As a new type of solid-state light source, white LED has the advantages of energy saving and environmental protection, high luminous efficiency, long life, and fast response. It is the fourth generation of green light source after the three major light sources of incandescent lamp, fluorescent lamp and high-pressure gas discharge lamp. Widely used in digital products, home or outdoor lighting and other fields. From the perspective of industrialization factors such as technological maturity and production cost, phosphor conversion white light LED is the current mainstream technology, and the realization method is to coat YAG:Ce phosphor powder on the blue LED chip through organic resin or silica gel. , Absorb part of t...

Claims

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Application Information

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IPC IPC(8): C09K11/80H01L33/50C04B35/44C04B35/626
CPCC04B35/44C04B35/6261C04B2235/3224C04B2235/3225C04B2235/3229C04B2235/3232C04B2235/3244C04B2235/3262C04B2235/3418C04B2235/6562C04B2235/9646C09K11/7774C09K11/7775H01L33/502Y02B20/00
Inventor 周有福许文涛洪茂椿郭旺张云峰
Owner FUJIAN INST OF RES ON THE STRUCTURE OF MATTER CHINESE ACAD OF SCI
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