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Red luminescent fluorescent powder and preparation method thereof

A technology for red light-emitting and phosphor powder, applied in the field of phosphor materials, can solve the problems of high cost, inability to be widely used, difficult preparation and the like of red light-emitting phosphor powder, and achieve the effects of low price, easy storage conditions, and easy preparation process.

Active Publication Date: 2015-02-04
HEBEI LIFU CHEM TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] One of the purposes of the present invention is to provide a red light-emitting phosphor to solve the problem that the existing red light-emitting phosphor cannot be widely used due to the disadvantages of high cost and difficult preparation.

Method used

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  • Red luminescent fluorescent powder and preparation method thereof
  • Red luminescent fluorescent powder and preparation method thereof
  • Red luminescent fluorescent powder and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] Example 1: Ca 0.95 AlGdSiN 4 : Preparation of 0.05Eu phosphor.

[0030] Using elemental Ca, Al, Gd, Si, and Eu as raw materials, and by weighing the ratio of the amount of the above raw materials to satisfy Ca:Al:Gd, Si:Eu=0.95:1:1:1:0.05, the above The weighed raw materials are put into an electric arc melting furnace for instant electric arc high-temperature melting to form an alloy body, and the obtained alloy body is crushed and ball-milled to obtain an alloy powder, which is put into a zirconia crucible and placed in a N 2 / H 2 Mixed atmosphere (N 2 with H 2 The volume ratio can be 75:25-95:5, the same below) and sinter at 1800°C for 5 hours, take out the sintered sample after cooling, and wash the sintered sample with deionized water until the pH value of the washing liquid is neutral. After drying, Ca 0.95 AlGdSiN 4 : 0.05Eu phosphor.

[0031] For the prepared Ca 0.95 AlGdSiN 4 : 0.05Eu fluorescent powder for X-ray diffraction test, the obtained X-ray d...

Embodiment 2

[0034] Example 2: Sr 0.1 Ca 0.8 Mg 0.09 Gd 0.05 Al 1.95 SiN 4 : Preparation of 0.01Eu phosphor.

[0035] Use elemental Sr, Ca, Mg, Gd, Al, Si, and Eu as raw materials, and make the ratio of the amount of the above raw materials meet Sr:Ca:Mg:Gd:Al:Si:Eu=0.1:0.8 by weighing: 0.09: 0.05: 1.95: 1: 0.01, put the raw materials weighed above into the arc melting furnace for instantaneous arc high-temperature melting to form alloy body, crush the obtained alloy body and obtain alloy powder after ball milling, put the alloy powder into oxidation Zirconium crucible, in N 2 / H 2 Sinter at 1600°C for 8 hours in a mixed atmosphere, take out the sintered sample after cooling, wash the sintered sample with deionized water until the pH value of the washing solution is neutral, and then dry to obtain Sr 0.1 Ca 0.8 Mg 0.09 Gd 0.05 Al 1.95 SiN 4 : 0.01Eu phosphor.

[0036] For the prepared Sr 0.1 Ca 0.8 Mg 0.09 Gd 0.05 Al 1.95 SiN 4 : 0.01Eu phosphor for excitation spectrum ...

Embodiment 3

[0038] Example 3: Ca 0.7 Ba 0.1 Ga 0.05 Al 1.95 SiN 4 : Preparation of 0.2Eu phosphor.

[0039] Elemental Ca, Ba, Ga, Al, Si, and Eu are used as raw materials, and the ratio of the amount of the above raw materials is satisfied by weighing Ca:Ba:Ga:Al:Si:Eu =0.7:0.1:0.05:1.95: 1:0.2, put the raw materials weighed above into an electric arc melting furnace for instantaneous arc high-temperature melting to form an alloy body, crush and ball-mill the obtained alloy body to obtain alloy powder, put the alloy powder into a zirconia crucible, and 2 / H 2 Sinter at 2100°C for 3 hours in a mixed atmosphere, take out the sintered sample after cooling, wash the sintered sample with deionized water until the pH value of the washing solution is neutral, and then dry to obtain Ca 0.7 Ba 0.1 Ga 0.05 Al 1.95 SiN 4 : 0.2Eu phosphor.

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Abstract

The invention provides red luminescent fluorescent powder and a preparation method thereof. The chemical general formula of the red luminescent fluorescent powder is M1-xAyAl2-ySiN4: xEu, wherein, M is at least one of Mg, Ca, Sr, Ba, Y, and Sc, A is at least one of Gd and Ga, x is not less than 0.01 and not more than 0.2, and y is not less than 0 and not more than 1. The preparation method of the red luminescent fluorescent powder comprises the following steps: a) weighing raw materials, namely M, A, Al, Si and Eu according to the stoichiometric ratio of various elements in the chemical general formula M1-xAyAl2-ySiN4: xEu, and putting the weighed raw materials into an electric arc smelting furnace for smelting to form an alloy; and b) crushing and ball-milling the alloy obtained in the step a), then performing high-temperature sintering in a protective atmosphere, cooling, then taking out, washing and drying to obtain the red luminescent fluorescent powder. The red luminescent fluorescent powder provided by the invention is low in preparation cost, and the preparation process is simple and easy to control.

Description

technical field [0001] The invention relates to a fluorescent powder material, in particular to a red light-emitting fluorescent powder and a preparation method thereof. Background technique [0002] In the field of lamp lighting, light-emitting diodes (LEDs) are more and more widely used due to their advantages of energy saving, environmental protection, long life and small size. LED will gradually replace traditional light source products and become the most competitive mainstream lighting source. At present, the white light LEDs on the market mainly use GaN chips to excite yellow phosphors to achieve white light. This mode of producing white light has a serious shortcoming that it lacks red components, which makes the LED color rendering index low, hindering the use of LEDs in the field of lighting. promotion and application. [0003] At present, the solution to the lack of red components in white LEDs is to add red luminescent phosphors (referred to as red phosphors) t...

Claims

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Application Information

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IPC IPC(8): C09K11/80
Inventor 杨志平赵金鑫
Owner HEBEI LIFU CHEM TECH
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