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Sunlight excitable orange-yellow long-afterglow luminescent material and preparation method thereof

A long afterglow material and long afterglow luminous technology, applied in luminescent materials, luminescent coatings, chemical instruments and methods, etc., can solve the problems of low afterglow luminous efficiency, unstable chemical properties, and gap in comprehensive performance, and achieve rare afterglow luminescent colors , easy to promote, and does not affect the effect of performance

Inactive Publication Date: 2020-04-07
UNIV OF SCI & TECH BEIJING
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The above-mentioned types of orange-red afterglow materials have two major disadvantages: the afterglow luminous efficiency is very low under sunlight irradiation conditions, and most afterglow luminescence can only occur under ultraviolet light irradiation conditions, which greatly limits their practical application. Applications in life; and the current commercialized SrS:Eu 2+ ,Pr 3+ , Ca 1-x Sr x S:Eu 2+ , Dy 3+ , Y 2 o 2 S: Eu 3+ ,Mg 2+ , Ti 4+ etc. (CN 103627387A; CN 101514289A etc.), there is still a big gap in comprehensive performance
However, even for commercial sulfide long-lasting luminescent materials, the afterglow time is generally less than 6 hours, and the chemical properties are unstable, easy to deliquescence, and degenerate to produce H 2 Toxic gas such as S

Method used

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  • Sunlight excitable orange-yellow long-afterglow luminescent material and preparation method thereof
  • Sunlight excitable orange-yellow long-afterglow luminescent material and preparation method thereof
  • Sunlight excitable orange-yellow long-afterglow luminescent material and preparation method thereof

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] The chemical composition formula of this embodiment is Sr 2.997 SiO 5 :0.002Eu 2+ ,0.001Zn 2+ The specific preparation method of the orange-yellow long-lasting luminescent material is as follows:

[0039] Step 1, according to the chemical composition formula Sr 2.997 SiO 5 :0.002Eu 2+ ,0.001Zn 2+ Stoichiometric ratio, weigh Sr(NO 3 ) 2 , Eu(NO 3 ) 6 ·6H 2 O, Zn(NO 3 ) 2 , nano-SiO 2 For high-purity raw materials, put them in an agate mortar and add an appropriate amount of ethanol to grind for 20-60 minutes to mix the raw materials evenly. After drying, transfer the mixed raw materials to a ceramic bowl and add 2-100mL of deionized water. It is placed in a high-temperature box-type furnace and burned at 200-950°C for 5-50 minutes, taken out after natural cooling, and ground again, and the obtained material is stored for later use;

[0040] Step 2. Put the mixture obtained in step 1 under a reducing atmosphere with a temperature of 1000°C-1600°C (reducing ...

Embodiment 2

[0043] The chemical composition formula of this embodiment is Sr 2.99 Si 0.998 o 5 :0.002Eu 2+ ,0.002Nb,0.01Zn 2+ The specific preparation method of the orange-yellow long-lasting luminescent material is as follows:

[0044] Step 1, according to the chemical composition formula Sr 2.99 Si 0.998 o 5 :0.002Eu 2+ ,0.002Nb,0.01Zn 2+ Stoichiometric ratio, weigh Sr(NO 3 ) 2 , Eu(NO 3 ) 6 ·6H 2 O, Zn(NO 3 ) 2 , nano-SiO 2 , Nb 2 o 5 For high-purity powder raw materials, put them in an agate mortar and add an appropriate amount of ethanol to grind for 20-60 minutes, so that the raw materials are fully mixed and even, after drying, transfer the mixed raw materials to a ceramic bowl and add 2-100mL of deionized water, then Put it in a high-temperature box furnace and burn it at 200-950°C for 5-50 minutes, take it out after natural cooling, grind it again, and put the obtained material aside for later use;

[0045] Step 2. Put the mixture obtained in step 1 under a red...

Embodiment 3

[0049] The chemical composition formula of this embodiment is Sr 2.968 Si 0.994 o 5 :0.002Eu 2+ ,0.006Nb,0.03Zn 2+ The specific preparation method of the orange-yellow long-lasting luminescent material is as follows:

[0050] Step 1, according to the chemical composition formula Sr 2.968 Si 0.994 o 5 :0.002Eu 2+ ,0.003Nb,0.03Zn 2+ Stoichiometric ratio, weigh Sr(NO 3 ) 2 , Eu(NO 3 ) 6 ·6H 2 O, Zn(NO 3 ) 2 , nano-SiO 2 , Nb 2 o 5 For high-purity powder raw materials, put them in an agate mortar and add an appropriate amount of ethanol to grind for 20-60 minutes, so that the raw materials are fully mixed and even, after drying, transfer the mixed raw materials to a ceramic bowl and add 2-100mL of deionized water, then Put it in a high-temperature box furnace and burn it at 200-950°C for 5-50 minutes, take it out after natural cooling, grind it again, and put the obtained material aside for later use;

[0051] Step 2. Put the mixture obtained in step 1 under a r...

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Abstract

The invention discloses a sunlight excitable orange-yellow long-afterglow luminescent material and a preparation method thereof. The chemical composition formula of the orange-yellow long-afterglow luminescent material is M3-x-y-nSi1-zO5:yEu<2+>, zNb, nZn, wherein M is Ca, Ba and Sr, and at least contains Sr; x is greater than or equal to 0 and smaller than or equal to 0.5, y is greater than or equal to 0.0002 and less than 0.06, z is greater than or equal to 0 and less than 0.35, and n is greater than 0 and less than 0.5. The preparation method includes: (1) weighing materials: selecting oxides in the structural formula or corresponding salts as the raw materials; (2) grinding and mixing the materials uniformly, and then performing presintering by combustion method; and (3) grinding the material obtained in step (2) uniformly, and performing sintering at 1000DEG C-1600DEG C for 2-8h in an H2 weak reducing atmosphere to synthesize the luminescent material. The emission band of the material is at 540-650nm, and the emission peak value is at about 585nm. After being irradiated by ultraviolet excitation light, the luminescent material has obvious macroscopic orange-yellow afterglow. And after being irradiated for a period of time under the sun, the material also has macroscopic obvious orange-yellow afterglow luminescence. The preparation method is simple in process, the light-emitting color is unique, and the material can be coordinated with organic materials, glass, ceramic and the like to be prepared into novel afterglow devices, has cheap raw materials, and is easy to popularize.

Description

technical field [0001] The invention relates to the technical field of luminescent materials, in particular to an orange-yellow long afterglow material that can be excited by sunlight and corresponding products. Background technique [0002] Long afterglow material is also called long afterglow luminescent material, and it is also a light storage material, and its essence is a photoluminescent material. It can absorb energy, such as: X-rays, ultraviolet light, visible light, etc. The main reason is that it has different depths of trap energy levels, which can trap and store electrons in the energy level traps, and can continue to emit light after the excitation source is removed, or can still emit light under the action of temperature and other photostimuli. Therefore, it is a promising material. Long afterglow luminescent materials have a wide range of uses, and can be used for indication lighting in dark environments, such as emergency passage lighting, long afterglow ro...

Claims

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Application Information

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IPC IPC(8): C09K11/59C09D5/22C09D11/03
CPCC09D5/22C09D11/03C09K11/7734
Inventor 刘泉林王志珍宋振
Owner UNIV OF SCI & TECH BEIJING