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Nitride fluorescent powder material and preparation method thereof

A nitride phosphor and chemical technology, applied in the direction of luminescent materials, chemical instruments and methods, etc., can solve the problems of unfavorable batch production, high cost, complicated process, etc., and achieve product cost reduction, high quantum efficiency, and wide process window Effect

Inactive Publication Date: 2013-03-13
IRICO
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The conventional method of synthesizing nitride phosphor adopts metal direct nitriding method. The raw material used in this method is to synthesize expensive and poorly chemically stable metals after nitriding, or directly purchase more expensive and extremely unstable metal nitrides. Synthesis, 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 batch production

Method used

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  • Nitride fluorescent powder material and preparation method thereof
  • Nitride fluorescent powder material and preparation method thereof

Examples

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Comparison scheme
Effect test

Embodiment 1

[0026] Sr 1.96 Si 4.5 Al 0.5 N 8 : Preparation of 0.04Eu phosphor.

[0027] Using Sr, Si, Al, Eu as raw materials, the ratio of the amount of the above substances is Sr: Si: Al: Eu=1.96: 4.5: 0.5: 0.04, and the above metals (or non-metals) are put into the arc melting furnace The alloy body is formed by instant arc high temperature in the process, the obtained alloy body is crushed and ball milled to obtain alloy powder, and the alloy powder is placed in a zirconia crucible. 2 Sinter at 1400°C for 10 hours, take it out after natural cooling, wash with deionized water until the pH value of the washing liquid is neutral, and then dry at 120°C for 2 hours to obtain Sr 1.96 Si 4.5 Al 0.5 N 8 : 0.04Eu phosphor.

Embodiment 2

[0029] Sr 1.95 Ca 0.04 Si 4.5 Al 0.5 N 8 : Preparation of 0.01Eu phosphor.

[0030] Using Sr, Ca, Si, Al, Eu as raw materials, the ratio of the amount of the above substances is Sr: Ca: Si: Al: Eu=1.95: 0.04: 4.5: 0.5: 0.01, and the above metal (or non-metal) , Put into the arc melting furnace for instant arc high temperature formation alloy body, the obtained alloy body is crushed and ball milled to obtain the alloy powder, the alloy powder is put into the zirconia crucible, the N 2 Sinter at 1500℃ for 8 hours, take it out by natural cooling, wash with deionized water, the pH value of the washing solution is neutral, and dry at 120℃ for 2 hours to obtain Sr 1.95 Ca 0.04 Si 4.5 Al 0.5 N 8 : 0.01Eu phosphor.

Embodiment 3

[0032] Sr 1.5 Ba 0.2 Si 5 N 8 : Preparation of 0.3Eu phosphor.

[0033] Using Sr, Ba, Si, Eu as raw materials, the ratio of the amount of the above substances is Sr: Ba: Si: Eu=1.5: 0.2: 5: 0.3, and the above metals (or non-metals) are put into the arc melting furnace The alloy body is formed by instant arc high temperature in the process, the obtained alloy body is crushed and ball milled to obtain alloy powder, and the alloy powder is placed in a zirconia crucible. 2 Sinter at 1800°C for 8 hours, take it out by natural cooling, wash with deionized water, the pH value of the washing solution is neutral, and dry at 120°C for 2 hours to obtain Sr 1.5 Ba 0.2 Si 5 N 8 : 0.3Eu phosphor.

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Abstract

The invention relates to the technical field of fluorescent powder for LED, and in particular to a nitride fluorescent powder material and a preparation method thereof. The nitride fluorescent powder material is characterized by having a chemical formula of M2-xSi5-yAlyN8:xEu; M represents one or a combination of two selected from alkaline earth metals including Mg, Ca, Sr and Ba; and x and y satisfy the relations of: 0.01<=x<=0.3, and y<0<=1.0. The invention has the following beneficial effects: 1. the luminescent material provided by the invention is an Eu activated nitride with high quantum efficiency, stable physical and chemical properties, and excellent antidamping performance; 2. the luminescent material provided by the invention has a wide range of excitation wavelength, and can be adapted to excitation of excitation sources with various wave bands; and 3. the method omits a metal nitridation process in a conventional to greatly reduce the product cost.

Description

Technical field [0001] The invention relates to the technical field of phosphors for LEDs, in particular to a nitride phosphor material 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 LED products on the market mainly use GaN chips to excite yellow phosphors to achieve white light. This mode of white light generation has a serious shortcoming of lack of red components, which hinders the promotion and application of LEDs, especially in the field of lighting. [0003] At present, the solution to the lack of red components in white LEDs is to add red phosphor to the red phosphor to increase its color r...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K11/64C09K11/59
Inventor 赵金鑫
Owner IRICO
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