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Nitride phosphor material and preparation method thereof

A technology of nitride phosphors and oxides, applied in the direction of luminescent materials, chemical instruments and methods, etc., can solve the problems of unfavorable mass production, high price, complex process, etc., and achieve product cost reduction, low price, and wide process window Effect

Inactive Publication Date: 2010-08-11
IRICO
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The conventional method of synthesizing nitride phosphors adopts metal direct nitriding method. The raw materials used in this method are expensive and chemically stable metals that are synthesized after nitriding, or directly purchase more expensive and extremely unstable metal nitrides. , the above two methods must be operated in a glove box under the protection of an inert atmosphere, the cost is high and the process is complicated, which is not conducive to industrial mass production

Method used

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  • Nitride phosphor material and preparation method thereof
  • Nitride phosphor material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] Example 1: Sr 1.96 Si 5 N 8 : Preparation of 0.04Eu Phosphor Powder

[0024] SrCO 3 , SiO 2 , α-Si 3 N 4 、Eu 2 o 3 , Carbon powder is the raw material, and the ratio of the amount of the above substances is SrCO 3 : SiO 2 : α-Si 3 N 4 :Eu 2 o 3 : carbon powder=1.96: 2: 1: 0.02: 1.96, the above-mentioned raw materials are fully ball-milled and mixed, then taken out, put into Mo crucible, in N 2 After sintering at 800°C for 24 hours in the atmosphere, raise the sintering temperature to 1500°C and continue 2 Sinter in the atmosphere for 15 hours, take it out after cooling, wash 3 times with isopropanol 5 times the volume of the sample, and dry to obtain Sr 1.96 Si 5 N 8 : 0.04Eu phosphor, its XRD pattern and emission spectrum, please refer to figure 1 and figure 2 .

Embodiment 2

[0025] Example 2: Sr 1.92 Ba 0.07 Si 5 N 8 : Preparation of 0.01Eu Phosphor Powder

[0026] SrCO 3 , Ba(NO 3 ) 2 , SiO 2 , α-Si 3 N 4 、Eu 2 o 3 、C 3 h 6 N 6 As the raw material, the ratio of the amount of the above substances to the substances is SrCO 3 :Ba(NO 3 ) 2 : SiO 2 : α-Si 3 N 4 :Eu 2 o 3 : C 3 h 6 N 6 = 1.92: 0.07: 2: 1: 0.005: 0.33, the above-mentioned raw materials are fully ball-milled and mixed, taken out, put into a Mo crucible, and 2 After sintering at 900°C in the atmosphere for 16 hours, raise the sintering temperature to 1800°C and continue to sinter in N 2 Sintered in the atmosphere for 10 hours, cooled and taken out, washed 3 times with isopropanol 6 times the volume of the sample, and dried to obtain Sr 1.92 Ba 0.07 Si 5 N 8 : 0.01Eu phosphor.

Embodiment 3

[0027] Example 3: Sr 1.7 Si 4.5 Al 0.5 N 8 : Preparation of 0.3Eu Phosphor Powder

[0028] SrCO 3 , AlN, SiO 2 , α-Si 3 N 4 、Eu 2 o 3 、C 2 h 4 N 4 As the raw material, the ratio of the amount of the above substances to the substances is SrCO 3 :AlN:SiO 2 : α-Si 3 N 4 :Eu 2 o 3 : C 2 h 4 N 4 = 1.7: 0.5: 1.5: 1: 0.15: 0.49, the above-mentioned raw materials are fully ball-milled and mixed, taken out, put into a Mo crucible, and 2 After sintering at 1000°C in the atmosphere for 20 hours, raise the sintering temperature to 1500°C and continue 2 -NH 3 (The volume ratio is 90:10) sintered in the atmosphere for 12 hours, cooled and taken out, washed 3 times with isopropanol 8 times the volume of the sample, and dried to obtain Sr 1.7 Si 4.5 Al 0.5 N 8 : 0.3Eu phosphor.

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Abstract

The invention provides a nitride phosphor material and a preparation method thereof. The nitride phosphor material is characterized in that the general chemical formula is M2-xSi5-yZyN8:xEu, wherein M is one or a combination of two of the alkaline-earth metals including Mg, Ca, Sr and Ba, and Z is one of Al and Ge; x is not less than 0.01 and not more than 0.3; and y is not less than 0 and not more than 1.0. The nitride phosphor material has low-price synthetic raw materials, stable performance and simple synthesis technology and is suitable for industrialized volume production.

Description

technical field [0001] The invention belongs to the technical field of fluorescent powder for LEDs, and relates to a nitride fluorescent powder and a preparation method thereof. Background technique [0002] With the advancement of LED-related technologies, white LEDs have made great progress in terms of luminous efficiency, service life, and cost reduction. With the emergence of energy problems, high-efficiency, energy-saving and pollution-free LEDs have broad application prospects, and LED lighting is also a long-term goal pursued by scientific researchers. However, white light LED products on the market mainly use GaN chips to excite yellow phosphor to achieve white light. There is a serious deficiency in the white light produced by this mode, which is the lack of red components, which hinders the promotion and application of LEDs, especially in the lighting field. [0003] At present, the solution to the lack of red components in white LEDs is to add red phosphors to wh...

Claims

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Application Information

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IPC IPC(8): C09K11/80C09K11/79
Inventor 赵金鑫
Owner IRICO
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