Nitride fluorescent powder and preparation method thereof

A technology of nitride phosphors and phosphors, applied in chemical instruments and methods, luminescent materials, etc., can solve the problems of low purity, poor anti-aging performance, and poor heat and humidity resistance of red fluorescent pink, and achieve long light decay time, Excellent high temperature resistance and high humidity resistance, excellent performance effect

Inactive Publication Date: 2017-05-10
HEBEI LIFU CHEM TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to provide a nitride fluorescent powder and its preparation method to solve the problems of low purity, poor heat and humidity resistance and poor anti-aging performance of the existing nitride red fluorescent powder.

Method used

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

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] According to Ca 0.992 AlMo 0.1 Si 0.9 N 3 : Eu 0.008 Stoichiometric ratio, weigh 0.331mol of Ca in an inert gas environment 3 N 2 , 1mol of AlN, 0.033mol of Mo 3 N 2 , 0.008mol of EuN and 0.3mol of Si 3 N 4 , and Ca 3 N 2 , AlN, Mo 3 N 2 , EuN purity are higher than 99.999%, D502 : MgF 2 :SrCl 2 =1:1:1 weigh BaCl 2 , MgF 2 and SrCl 2, and mixed evenly in denatured alcohol, then dried, and passed through a 300-mesh sieve to obtain a flux. The prepared flux was weighed, and the amount of the flux was 3wt% of the total mass of the above mixture. Mix the raw materials and flux in the air-flow mixer for 3 hours and then fill them in the molybdenum crucible, put the molybdenum crucible in another boron nitride crucible with a slightly larger diameter, and fill the SiC powder between the two crucibles , cover the crucible lid. Put this boron nitride crucible in a pressure furnace under H 2 The nitrogen-hydrogen mixture with a volume fraction of 5% is sinte...

Embodiment 2～22

[0041] The preparation methods of Examples 2-22 are the same as those of Example 1, except that the Mo content is changed.

[0042] Table 1 shows the samples prepared in Examples 1-22 and Comparative Example 1 and their performance parameters.

[0043] Table 1

[0044] Example structural formula light intensity x color coordinate Peak wavelength / nm Particle size / μm Comparative example 1 Eu 0.008 Ca 0.992 AlSiN 3

100 0.669 653 15 Example 1 Ca 0.992 AlMo 0.1 Si 0.9 N 3 : Eu 0.008

100.5 0.6685 652 12 Example 2 Ca 0.992 AlMo 0.15 Si 0.85 N 3 : Eu 0.008

102 0.6682 652 12 Example 3 Ca 0.992 AlMo 0.2 Si 0.8 N 3 : Eu 0.008

103 0.6678 652 12 Example 4 Ca 0.992 AlMo 0.25 Si 0.75 N 3 : Eu 0.008

105 0.6673 651 12 Example 5 Ca 0.992 AlMo 0.3 Si 0.7 N 3 : Eu 0.008

104 0.6665 651 12 Example 6 Ca 0.992 AlMo 0.35 Si 0.65 N 3 : Eu...

Embodiment 23～35

[0048] The preparation method of Examples 23-35 is the same as that of Example 1, except that the concentration of Eu is changed. Table 2 shows the prepared samples and their performance parameters.

[0049] Table 2

[0050] Example structural formula light intensity x color coordinate Peak wavelength / nm Particle size / μm Example 23 Ca 0.996 AlMoN 3 : Eu 0.002

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Abstract

The invention provides nitride fluorescent powder and a preparation method thereof. The general chemical formula of the nitride fluorescent powder is AxDENy:R(1-x), wherein A represents one or two of Sr, Ca, Mg, Zn and Ba; D represents one or two of B, Al, Ga, In, Tl, Sc, Y, La, Gd, Lu and W, and Al is necessary; E represents one or two of Si, C, Ge, Sn, Ti, Zr, Hf and Mo, and Mo is necessary; R represents one or two of Ce, Pr, Nd, Sm, Eu, Tb, Dy, Ho, Er, Tm, Yb and Mn; 0<x<1, and 2<y<4. The nitride fluorescent powder has the advantages that the nitride fluorescent powder is high in luminance, excellent in high temperature resistance and high humidity resistance, good in aging resistance and long in light attenuation time, and the nitride fluorescent powder can be effectively excited by ultraviolet and blue light to emit long-wave-band red light with the wavelength being 600-670 nanometers. The preparation method has the advantages that the method is simple in preparation process, low in operation cost, wide in process window and suitable for large-scale industrial production, and the prepared fluorescent powder can be applied to the LED lighting field or the backlight field.

Description

technical field [0001] The invention relates to a luminescent material and a preparation method thereof, in particular to a nitride fluorescent powder and a preparation method thereof. Background technique [0002] Compared with traditional incandescent lamps, fluorescent lamps and high-intensity gas discharge lamps, white LEDs that realize photoelectric conversion through semiconductor light-emitting diodes not only have the characteristics of high luminous efficiency, long life, low energy consumption, and no pollution to the environment, but also have high brightness. , small size, fast response, less heat generation, etc., is considered to be one of the high-tech products with the most development potential and market prospects in the 21st century, and has become the fourth generation of lighting sources after tungsten filament lamps, fluorescent lamps and energy-saving lamps. [0003] At present, the relatively mature method in the industry is to use InGaN blue light ch...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K11/68
CPCC09K11/7734C09K11/0883
Inventor 杨志平李璇璇赵金鑫
Owner HEBEI LIFU CHEM TECH
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