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Preparation method of phosphate luminescent material with adjustable luminescent color and luminescent material prepared by method

A technology of luminescent materials and luminescent colors, which is applied in the direction of luminescent materials, chemical instruments and methods, sustainable buildings, etc., can solve problems such as differences in the thermal stability of phosphors, and achieve the effects of simple methods, good dispersibility, and good material properties

Active Publication Date: 2020-11-24
SHANDONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the strong self-absorption phenomenon between different phosphors and the thermal stability difference among phosphors are two unavoidable and challenging issues for multi-phosphor conversion WLEDs.

Method used

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  • Preparation method of phosphate luminescent material with adjustable luminescent color and luminescent material prepared by method
  • Preparation method of phosphate luminescent material with adjustable luminescent color and luminescent material prepared by method
  • Preparation method of phosphate luminescent material with adjustable luminescent color and luminescent material prepared by method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0055] Embodiment 1: x=2%, CMNP(sol)@2%CENP fluorescent material of yellow light emission

[0056] (1) Synthesis of 1mmol CMNP(sol)

[0057] 2.1253gCa(NO 3 ) 2 • 4H 2 O, 0.0850gNaNO 3 , 0.2451gMn(CH 3 COO) 2 • 4H 2 O was dissolved in deionized water, added 4.6231g of citric acid monohydrate, and stirred to dissolve.

[0058] Add 0.8052 g (NH 4 )H 2 PO 4 , join HNO 3 Adjust the pH value to 3, add deionized water until the total volume of the solution is 50ml, add 5g of PEG, and stir for 2 hours to form a uniform wet sol.

[0059] at 80 o C in a water bath and heated until the xerogel is formed; finally, the xerogel was heated at 500 o The CMNP precursor (CMNP(sol)) was obtained after calcination in C air atmosphere for 4 hours.

[0060] (2) Preparation of CMNP(sol)@2%CENP samples

[0061] 0.0425gCa(NO 3 ) 2 • 4H 2 O, 0.0017gNaNO 3 , 2 mlEu(NO 3 ) 3 The solution (concentration: 0.01mol / L) was dissolved in deionized water, 0.0925g of citric acid monohydrate w...

Embodiment 2

[0064] Example 2: x=5%, CMNP(sol)@5%CENP fluorescent material emitting white light

[0065] (1) Synthesis of 1mmol CMNP(sol)

[0066] 2.1253gCa(NO 3 ) 2 • 4H 2 O, 0.0850gNaNO 3 , 0.2451gMn(CH 3 COO) 2 • 4H 2 O was dissolved in deionized water, added 4.6231g of citric acid monohydrate, and stirred to dissolve.

[0067] Add 0.8052 g (NH 4 )H 2 PO 4 , join HNO 3 Adjust the pH value to 3, add deionized water until the total volume of the solution is 50ml, add 5g of PEG, and stir for 2 hours to form a uniform wet sol.

[0068] at 80 o C water bath heated to xerogel formation; xerogel at 500 o The CMNP precursor (CMNP(sol)) was obtained after calcination in C air atmosphere for 4 hours.

[0069] (2) Preparation of CMNP(sol)@5%CENP samples

[0070] 0.1063gCa(NO 3 ) 2 • 4H 2 O, 0.0042gNaNO 3 , 5mlEu(NO 3 ) 3 The solution (concentration: 0.01mol / L) was dissolved in deionized water, 0.2312g of citric acid monohydrate was added, and stirred to dissolve.

[0071] Add...

Embodiment 3

[0073] Example 3: x=20%, CMNP(sol)@20%CENP fluorescent material emitting green light

[0074] (1) Synthesis of 1mmol CMNP(sol)

[0075] 2.1253gCa(NO 3 ) 2 • 4H 2 O, 0.0850gNaNO 3 , 0.2451gMn(CH 3 COO) 2 • 4H 2 O was dissolved in deionized water, added 4.6231g of citric acid monohydrate, and stirred to dissolve.

[0076] Add 0.8052 g (NH 4 )H 2 PO 4 , join HNO 3 Adjust the pH value to 3, add deionized water until the total volume of the solution is 50ml, add 5g of PEG, and stir for 2 hours to form a uniform wet sol.

[0077] at 80 o C water bath heated to xerogel formation; xerogel at 500 o The CMNP precursor (CMNP(sol)) was obtained after calcination in C air atmosphere for 4 hours.

[0078] (2) Preparation of CMNP(ol)@20%CENP samples

[0079] 0.4251Ca(NO 3 ) 2 • 4H 2 O, 0.0170gNaNO 3 , 20ml Eu(NO 3 ) 3 The solution (concentration: 0.01mol / L) was dissolved in deionized water, 0.9246g of citric acid monohydrate was added, and stirred to dissolve.

[0080] Ad...

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Abstract

The invention discloses a preparation method of a beta-Ca3(PO4)2 type phosphate luminescent material with adjustable luminescent color and a luminescent material prepared by the method, and belongs tothe technical field of luminescent materials. The preparation method which adopts two steps of a sol-gel method comprises the following steps: preparing a CMNP precursor by a first step of the sol-gel method, and preparing Ca9EuNa(PO4)7 wet sol by a second step of the sol-gel method; and calcining Ca9MnNa(PO4)7 xerogel at low temperature to obtain the CMNP precursor, dispersing the CMNP precursorin the Ca9EuNa(PO4)7 wet sol to obtain a uniform mixture, then heating the uniform mixture to form mixed xerogel, and finally, calcining the mixed xerogel to obtain the phosphate luminescent material. From the aspect of synthesis, the luminescent property of the CMNP material is regulated and controlled by a two-step sol-gel synthesis strategy, and thus, regulation and control of the material from red light to yellow light to white light to green light are realized. The method is simple and easy to operate, and the obtained material has favorable properties.

Description

[0001] technical field [0002] The invention relates to the technical field of luminescent materials, in particular to a β-Ca with adjustable luminous color 3 (PO 4 ) 2 A method for preparing a type phosphate luminescent material and a luminescent material prepared by the method. Background technique [0003] Electricity lights up the world, but with the accelerated development of the digital age, global electricity consumption is increasing year by year. In the context of global energy saving and emission reduction, phosphor-converted white light-emitting diodes (pc-WLEDs) are receiving more and more attention in the fields of backlight display, general lighting, and architectural decoration due to their advantages of energy saving, pollution-free, and long life. research and attention. [0004] In the field of full-spectrum lighting and full-color display, it is usually necessary to combine ultraviolet (UV) or blue LED chips with various phosphors to obtain spectral emi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K11/71C09K11/81C09K11/02
CPCC09K11/02C09K11/71C09K11/7738Y02B20/00
Inventor 尚蒙蒙黄帅王金迪
Owner SHANDONG UNIV
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