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a lapo 4 : CE coated calcium strontium aluminum europium composite luminescent material and its preparation method and application

A luminescent material and coating technology, applied in luminescent materials, chemical instruments and methods, etc., can solve the problem of single rare-earth luminescent material, and achieve the effects of easy synthesis and simple method operation.

Active Publication Date: 2022-03-22
北斗兄弟天津科技股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] However, the existing rare earth luminescent materials are relatively single, and the demand for multiple anti-counterfeiting technologies puts forward further requirements for luminous anti-counterfeiting technology

Method used

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  • a lapo <sub>4</sub> : CE coated calcium strontium aluminum europium composite luminescent material and its preparation method and application
  • a lapo <sub>4</sub> : CE coated calcium strontium aluminum europium composite luminescent material and its preparation method and application
  • a lapo <sub>4</sub> : CE coated calcium strontium aluminum europium composite luminescent material and its preparation method and application

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preparation example Construction

[0033] The present invention provides the LaPO described in the technical scheme 4 The preparation method of Ce-coated calcium strontium aluminum europium composite luminescent material comprises the following steps:

[0034] Strontium nitrate, calcium nitrate, europium nitrate, aluminum nitrate, urea and water are mixed to obtain a mixed solution; the molar ratio of strontium nitrate, calcium nitrate, europium nitrate and aluminum nitrate is 0.49:0.49:0.02:2;

[0035] Combusting the mixed solution to obtain calcium strontium aluminum europium complex;

[0036] The calcium strontium aluminum europium complex, sodium phosphate, lanthanum nitrate, cerium nitrate and water are mixed for aqueous solution synthesis to obtain LaPO 4 : Ce coated calcium strontium aluminum europium composite luminescent material.

[0037] The invention mixes strontium nitrate, calcium nitrate, europium nitrate, aluminum nitrate, urea and water to obtain a mixed solution.

[0038] In the present inven...

Embodiment 1

[0049] 0.49mmol strontium carbonate (SrCO 3 ) was diluted with deionized water, stirred and mixed, and then added 0.98mmol concentrated nitric acid (97% in mass fraction), and the reaction was observed. When bubbles did not continue to appear, stop adding concentrated nitric acid, and heated and stirred at 50°C to obtain strontium nitrate (Sr(NO 3 ) 2 )solid;

[0050] to 0.49mmol Sr(NO 3 ) 2 , 0.49mmol Ca(NO 3 ) 2 4H 2 O, 0.02mmol Eu(NO 3 ) 3 ·6H 2 Add 10mL deionized water to O to obtain the first mixed solution;

[0051] to 2mmolAl(NO 3 ) 3 9H 2 Add 10mL deionized water in O and 2.2g urea, obtain the second mixed solution;

[0052] Add the first mixed solution to the second mixed solution, put the resulting solution into the crucible of the muffle furnace, preheat to 600°C, and heat for 2 minutes and 52 seconds to obtain the calcium strontium aluminum europium complex Ca 0.49 Sr 0.49 Al 2 o 4 : Eu 0.02 ;

[0053] Mix 0.1 mmol of the calcium strontium alumi...

Embodiment 2

[0055] The only difference between this example and Example 1 is that the synthesis time of the aqueous solution is 2h, which is recorded as 2h LaPO 4 :Ce@Ca 0.49 Sr 0.49 Al 2 o 4 :Eu 0.02 .

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Abstract

The invention provides a LaPO 4 The invention relates to a Ce-coated calcium strontium aluminum europium composite luminescent material and a preparation method and application thereof, belonging to the technical field of luminescent materials. LaPO of the present invention 4 :Ce coated calcium strontium aluminum europium composite luminescent material including Ca 0.49 Sr 0.49 Al 2 o 4 :Eu 0.02 and coated on the Ca 0.49 Sr 0.49 Al 2 o 4 :Eu 0.02 Lanthanum cerium phosphate complexes on the surface. The present invention uses lanthanum cerium phosphate complex to coat Ca 0.49 Sr 0.49 Al 2 o 4 :Eu 0.02 , LaPO 4 : The composite material after Ce doping can absorb ultraviolet light, and can 0.49 Sr 0.49 Al 2 o 4 :Eu 0.02 The corresponding spectrum is emitted in the absorption spectrum range, so as to achieve the effect of spectrum adjustment.

Description

technical field [0001] The invention relates to the technical field of luminescent materials, in particular to a LaPO 4 : Ce-coated calcium strontium aluminum europium composite luminescent material and its preparation method and application. Background technique [0002] Rare earth luminescence is caused by the transition of rare earth 4f electrons at different energy levels. According to different excitation methods, luminescence can be divided into photoluminescence, cathodoluminescence, electroluminescence, radioluminescence, X-ray luminescence, triboluminescence, chemiluminescence and bioluminescence. Rare earth luminescence has strong absorption capacity, high conversion efficiency, can be emitted from the ultraviolet spectrum to the infrared spectrum, especially has the advantages of strong transmission capacity in the visible light region. Rare earth luminescent materials have been widely used in displays, new light sources, X-ray intensified screens, etc., and gra...

Claims

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Application Information

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IPC IPC(8): C09K11/81
CPCC09K11/7777
Inventor 王纪刚高存津曾海珠黄星海刘全校张春秀李东立罗世永曹国荣许文才
Owner 北斗兄弟天津科技股份有限公司
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