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Novel difunctional ultraviolet luminescent material having long afterglow and mechanoluminescence

A luminescent material and stress luminescence technology, applied in luminescent materials, chemical instruments and methods, etc., can solve the problems that the luminous intensity does not meet the requirements of the application, and the types of stress luminescent materials are scarce.

Inactive Publication Date: 2013-07-10
INST OF URBAN ENVIRONMENT CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, since stress luminescence is a new type of luminescence phenomenon, there are few studies at present, and the types of stress luminescence materials developed are rare, and the luminous intensity is far from meeting the requirements of applications.

Method used

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  • Novel difunctional ultraviolet luminescent material having long afterglow and mechanoluminescence
  • Novel difunctional ultraviolet luminescent material having long afterglow and mechanoluminescence
  • Novel difunctional ultraviolet luminescent material having long afterglow and mechanoluminescence

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0008] Take Sr 1.98 MgSi 1.95 al 0.05 o 6 : Ce 0.01 , Dy 0.01 As an example, it is synthesized by a typical solid-state synthesis method. About to analyze pure SrCO 3 , MgO, SiO 2 、Al 2 o 3 , CeO 2 、Dy 2 o 3 After adding ethanol according to the molar ratio for thorough grinding and mixing, pre-fired at 800°C for 2 hours, then fully ground, put it into an atmosphere furnace and roast at 1200°C for 4 hours in a hydrogen atmosphere to obtain the required sample. The resulting samples were tested for fluorescence properties (see attached figure 1 , figure 2 ), the results show that the developed sample has a strong luminescence at 347nm, and the afterglow can last for 3 hours. Mix the obtained luminescent powder sample with high elastic resin (mass ratio 1:3) to prepare a rectangular module (4X2X2cm). And use the self-made instrument to carry out stress luminescence test on it, the result (see image 3 ) shows that the stress luminescence wavelength is consistent...

Embodiment 2

[0010] According to the chemical formula Sr 1.98 MgSi 1.95 Ga 0.05 o 6 : Ce 0.01 ,La 0.01 Accurately weigh analytically pure SrCO by molar ratio 3 , MgO, SiO 2 , Ga 2 o 3 , CeO 2 , La 2 o 3 After adding ethanol for thorough grinding and mixing, pre-fire at 800 degrees for 2 hours, then fully grind, put into the hydrogen atmosphere of the atmosphere furnace (H 2 / Ar) at 1200°C for 4 hours to obtain the desired sample. The obtained sample was tested for fluorescence performance, and the results showed that the developed sample had a strong luminescence at 347nm, and the afterglow could last for 3.5 hours. Mix the obtained luminescent powder sample with high elastic resin (mass ratio 1:3) to prepare a rectangular module (4X2X2cm). And use the autonomous instrument to carry out the stress luminescence test, the results show that the stress luminescence wavelength is consistent with the photoluminescence wavelength, located at 347nm, and has a high sensitivity to stres...

Embodiment 3

[0012] According to the chemical formula Sr 1.98 MgSi 1.95 B 0.05 o 6 : Ce 0.01 ,Ho 0.01 Accurately weigh analytically pure SrCO by molar ratio 3 , MgO, SiO 2 、B 2 o 3 , CeO 2 、Ho 2 o 3 After adding ethanol for thorough grinding and mixing, pre-fire at 800 degrees for 2 hours, then fully grind, put into the hydrogen atmosphere of the atmosphere furnace (H 2 / Ar) at 1200°C for 4 hours to obtain the desired sample. The obtained sample was tested for fluorescence performance, and the results showed that the developed sample had strong luminescence at 347nm, and the afterglow could last for 3 hours. The same stress luminescence performance test shows that the prepared samples have high stress luminescence performance (1000N, 2.1×10 6 cps).

[0013] The functional ultraviolet luminescent material in the present invention has the following superior properties:

[0014] 1. It has high stress luminous performance, under the action of low mechanical force (1000N), its st...

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PUM

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Abstract

The invention relates to a novel difunctional ultraviolet luminescent material having long afterglow and mechanoluminescence. The novel difunctional ultraviolet luminescent material has a chemical formula of aSrO. bMgO. cSiO2. dMe<III>2O3. xCeO2. yRe2O3, wherein Me<III> represents one or more of Al, Ga, B and V; Re represents one or more of Y, La, Pr, Nd, Sm, Ho, Gd, Sc, Tm, Dy and Lu; a, b, c, d, x and y represent mole numbers; a is greater than or equal to 1 and less than or equal to 3; b is greater than or equal to 0.8 and less than or equal to 1.2; c is greater than or equal to 1.5 and less than or equal to 3; d is greater than or equal to 0.01 and less than or equal to 0.1; x is greater than or equal to 0.001 and less than or equal to 0.1; and y is greater than or equal to 0.001 and less than or equal to 0.3. A preparation method of the novel difunctional ultraviolet luminescent material comprises the following steps of fully grinding a spectroscopically pure parent material, an activator, a coactivator and a fluxing agent, carrying out pre-sintering in air, hydrogen, hydrogen-nitrogen mixed gas and hydrogen-argon mixed gas at a temperature of 500 to 1000 DEG C for 2 to 6 hours, cooling to a room temperature, taking out the cooled materials, fully grinding again, uniformly mixing, carrying out sintering at a temperature of 800 to 1300 DEG C for 4 to 10 hours, taking out the obtained sample, and carrying out grinding. The novel difunctional ultraviolet luminescent material has long afterglow and good stress response sensitivity.

Description

technical field [0001] The invention relates to the invention of a novel ultraviolet luminescent material having both long afterglow and stress luminescent properties. The luminescent material has SrO.bSiO 2 .cMe 2 o 3 .xCeO 2 .yRe 2 o 3 chemical formula. More specifically, the present invention relates to changing the structure of the luminescent material by adding different chemical elements, thereby realizing a dual-functional ultraviolet luminescent material with both long afterglow and stress luminescent properties. Background technique [0002] Long afterglow luminescence nanomaterials have excellent long afterglow luminescence properties and are widely used in many fields. However, there are few types of traditional long-lasting luminescent materials, and the luminescent colors are limited to several colors such as green, blue, and red. How to develop full-color long-lasting luminescent materials is currently a hot spot in the field of luminescence research. S...

Claims

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Application Information

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IPC IPC(8): C09K11/64C09K11/62C09K11/63
Inventor 张洪武徐斌房立均
Owner INST OF URBAN ENVIRONMENT CHINESE ACAD OF SCI
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