Single-phase rare earth vanadium phosphate white fluorescent powder for mercury lamp and preparation method thereof

A vanadium phosphate and phosphor technology, applied in the field of inorganic photoluminescent materials, can solve the problems of insignificant enhancement of the luminous intensity of phosphors, increase production costs, and be unfavorable for practical applications, and achieve a wide excitation range, low cost, and consistency. good effect

Inactive Publication Date: 2011-02-16
XIAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

But Bi 3+ and Y 3+ , La 3+ The enhancement effect of co-doping on the luminous intensity of phosphor is not obvious, and the above-mentioned co-doped ions are

Method used

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  • Single-phase rare earth vanadium phosphate white fluorescent powder for mercury lamp and preparation method thereof
  • Single-phase rare earth vanadium phosphate white fluorescent powder for mercury lamp and preparation method thereof
  • Single-phase rare earth vanadium phosphate white fluorescent powder for mercury lamp and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0076] A preparation of Mg 0.001 Y 0.989 P 0.8 V 0.2 o 4 : Dy 3+ 0.01 The method of single-phase rare earth vanadium phosphate white light phosphor:

[0077] (a) Prepare raw material B component Mg(OH) 2 , C component Y (NO 3 ) 3 ·6H 2 O, D component Dy 2 o 3 , E component (NH 4 ) 2 HPO 4 , F component NH 4 VO 3 , according to n=0, x=0.001, y=0.01, z=0.8, weigh 0.0006g Mg(OH) 2 , 3.8g Y(NO 3 ) 3 ·6H 2 O, 0.019g D y 2O 3 , 1.06g (NH 4 ) 2 HPO 4 and 0.228g NH 4 VO 3 ;

[0078] (b) Mg(OH) 2 , Y(NO 3 ) 3 ·6H 2 O and Dy 2 o 3 Mix evenly, add 25ml of nitric acid with a concentration of 69% and heat the mixture at 50°C to fully dissolve the mixture to obtain a clear solution A;

[0079] (c) Will (NH 4 ) 2 HPO 4 and NH 4 VO 3 Mix evenly, add 35ml of ammonia water with a concentration of 25% and heat the mixture at 50°C to fully dissolve the mixture to obtain a clear solution B;

[0080] (d) Mix solution A and solution B, heat the mixed solution ...

Embodiment 2

[0083] A preparation of Na 0.15 Mg 0.15 Y 0.75 PO 4 : Dy 3+ 0.1 The method of single-phase rare earth vanadium phosphate white light phosphor:

[0084] (a) Prepare raw material A component NaNO 3 , B component MgO, C component Y 2 o 3 , D component Dy(NO 3 ) 3 ·6H 2 O, E components (NH 4 ) 2 HPO 4 , according to n=1, x=0.15, y=0.1, z=1, weigh 0.135gNaNO 3 , 0.06g MgO, 0.85g Y 2 o 3 , 0.457g Dy(NO 3 ) 3 ·6H 2 O, 1.33g (NH 4 ) 2 HPO 4 ;

[0085] (b) NaNO 3 , MgO, Y 2 o 3 and Dy(NO 3 ) 3 ·6H 2 O mixed evenly, adding 25ml of nitric acid with a concentration of 69% and fully dissolving the mixture under heating conditions at 50°C to obtain a clear solution A;

[0086] (c) Will (NH 4 ) 2 HPO 4 Add 35ml of ammonia water with a concentration of 25% and fully dissolve it under heating at 50°C to obtain a clear solution B;

[0087] (d) Mix solution A and solution B, heat the mixed solution at 50°C and keep stirring, use NH 3 ·H 2 0 adjusts the pH value...

Embodiment 3

[0090] A kind of preparation K 0.004 Ca 0.001 La 0.699 VO 4 : Dy 3+ 0.3 The method of single-phase rare earth vanadium phosphate white light phosphor:

[0091] (a) Prepare raw material G component K 2 CO 3 , H component CaO, I component La 2 o 3 , J component Dy 2 o 3 , L component V 2 o 5 , press n=4, x=0.001, y=0.3, z=0, weigh 0.0028g K 2 CO 3 , 0.0006gCaO, 1.14g La 2 o 3 , 0.57g Dy 2 o 3 and 0.91g V 2 o 5 ;

[0092] (b) K 2 CO 3 , CaO, La 2 o 3 、Dy 2 o 3 and V 2 o 5 , after fully grinding and mixing uniformly, calcining at 1300°C for 5 hours, cooling to room temperature, taking out the material and grinding to obtain a single-phase rare earth vanadium phosphate white phosphor for mercury lamps.

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PUM

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Abstract

The invention relates to single-phase rare earth vanadium phosphate white fluorescent powder for the mercury lamp. The chemical formula of the fluorescent powder is M1nxM2xRE1-x-yPzV1-zO4:Dy3+y, wherein RE represents rare earth ion Y<3+>, La<3+>,Gd<3+> or Lu<3+>; M1 represents alkaline metal ion Li<+>, Na<+> or K<+>; M2 represents alkaline-earth metal ion Mg<2+>, Ca<2+>, Sr<2+> or Ba<2+>; and 0<=n<=4, 0<=x<=0.4, 0<=y<=0.3, and 0<=z<=1. The preparation method comprises the following steps: adopting the chemical co-precipitation method to dissolve raw materials with the corresponding negative ions and positive ions and generate precipitate, and washing, drying and calcining the precipitate in turn; or adopting the solid state reaction to fully mix and grinding raw materials, and calcining to obtain the single-phase fluorescent powder with the same crystalline structure of the matrix (RE(P,V)O4). By utilizing the co-sensitizing effect of alkali metal ions and alkaline earth metal ions, the luminous intensity of the fluorescent powder is increased.

Description

technical field [0001] The invention belongs to the technical field of inorganic photoluminescence materials, and relates to a single-phase rare earth vanadium phosphate white light fluorescent powder for mercury lamps and a preparation method. The material emits good white light under the ultraviolet excitation of mercury lamps, and can also be used for ultraviolet white light LEDs . Background technique [0002] Dy 3+ Activate rare earth vanadium phosphate (abbreviated as RE(P,V)O 4 : Dy 3+ ) under the excitation of ultraviolet light, Dy 3+ It has characteristic emission around 483nm and 573nm, and white light can be obtained after recombination. Luminous intensity is an important indicator of phosphor performance. For rare earth vanadium phosphate phosphors, the usual way to increase luminous intensity is to increase the degree of crystallization, that is, to increase the final heat treatment temperature. However, if the calcination temperature is too high, the vanad...

Claims

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Application Information

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IPC IPC(8): C09K11/83C09K11/81C09K11/82
CPCY02B20/181Y02B20/00
Inventor 何毓阳宋衍滟赵麦群艾璇李峰赵高扬
Owner XIAN UNIV OF TECH
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