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Cyan mechanoluminescent material applied to low-temperature detection as well as preparation method and application thereof

An electroluminescence and cyan technology, applied in the field of cyan electroluminescence materials and their preparation, can solve the problems of lack of low temperature trap energy level, decreased application sensitivity, loss of stress detection ability, etc.

Active Publication Date: 2021-08-13
CHANGCHUN INST OF OPTICS FINE MECHANICS & PHYSICS CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The currently reported materials are mainly mechanoluminescent materials applied at room temperature. Due to the lack of low-temperature trap levels at low temperatures, the application sensitivity is reduced, and even the stress detection ability is lost at extremely low temperatures (such as -270°C).

Method used

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  • Cyan mechanoluminescent material applied to low-temperature detection as well as preparation method and application thereof
  • Cyan mechanoluminescent material applied to low-temperature detection as well as preparation method and application thereof
  • Cyan mechanoluminescent material applied to low-temperature detection as well as preparation method and application thereof

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preparation example Construction

[0041] The present invention also provides a method for preparing the above-mentioned cyan electroluminescent material, comprising the following steps:

[0042] (1) Weigh the raw material BaCO according to the stoichiometric ratio 3 , SiO 2 、Eu 2 o 3 , use a planetary ball mill according to the weight ratio of raw materials: balls: alcohol = 1:1:0.05 to perform ball milling for 24 hours to obtain a slurry mixture, place it in an oven and dry it at 60°C for 19 hours, then take it out and sieve it to obtain a uniformly dispersed powder;

[0043] (2) Put the powder in a crucible and put it in a tube furnace to feed a mixed gas with a volume ratio of 10% hydrogen and 90% nitrogen, and sinter at 1200°C for 6h to obtain Ba (2-2X) SiO 4 :Eu 2+ (2X) ;

[0044] (3) Take raw material Ba by stoichiometric ratio (2-2X) SiO 4 :Eu 2+ (2X) 、Si 3 N 4 ; Use a planetary ball mill according to the weight ratio of raw materials: balls: alcohol = 1:1:0.05 to perform ball milling for 1...

Embodiment 1

[0056] The preparation process of a kind of cyan electroluminescent material is as follows:

[0057] (1) Weigh the raw material BaCO according to the stoichiometric ratio 3 , SiO 2 、Eu 2 o 3 , use a planetary ball mill according to the weight ratio of raw materials: balls: alcohol = 1:1:0.05 ball mill the slurry mixture for 24 hours, put the obtained slurry mixture in an oven at 60 ° C for 19 hours, then take it out and sieve , to obtain a uniformly dispersed powder;

[0058] (2) Put the powder in a crucible, place it in a tube furnace, feed 10% hydrogen-nitrogen mixed gas, and sinter at 1200°C for 6 hours to obtain Ba 1.9998 SiO 4 :Eu 2+ 0.0002 ;

[0059] (3) Take raw material Ba by stoichiometric ratio 1.9998 SiO 4 :Eu 2+ 0.0002 、Si 3 N 4 ; Use a planetary ball mill according to the weight ratio of raw materials: balls: alcohol = 1:1:0.05 to perform ball milling for 1.5 hours to obtain a slurry mixture, place it in an oven and dry it at 60°C for 19 hours, then ...

Embodiment 2

[0063] The preparation process of a kind of cyan electroluminescent material is as follows:

[0064] (1) Weigh the raw material BaCO according to the stoichiometric ratio 3 , SiO 2 、Eu 2 o 3 , use a planetary ball mill according to the weight ratio of raw materials: balls: alcohol = 1:1:0.05 ball mill the slurry mixture for 24 hours, put the obtained slurry mixture in an oven at 60 ° C for 19 hours, then take it out and sieve , to obtain a uniformly dispersed powder;

[0065](2) Put the powder in a crucible, place it in a tube furnace, feed 10% hydrogen-nitrogen mixed gas, and sinter at 1200°C for 6 hours to obtain Ba 1.0 SiO 4 :Eu 2+ 1.0 ;

[0066] (3) Take raw material Ba by stoichiometric ratio 1.0 SiO 4 :Eu 2+ 1.0 、Si 3 N 4 ; Use a planetary ball mill according to the weight ratio of raw materials: balls: alcohol = 1:1:0.05 to perform ball milling for 1.5 hours to obtain a slurry mixture, place it in an oven and dry it at 60°C for 19 hours, then take it out a...

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Abstract

The invention provides a cyan mechanoluminescent material which can realize material damage detection at a low temperature of -270 DEG C to -50 DEG C. The chemical general formula of the cyan mechanoluminescent material is Ba (1-X) Si2O2N2: Eu < 2 + > (X), wherein 0.0001 < = X < = 0.5, and the trap distribution range of the cyan mechanoluminescent material is -270 DEG C to 400 DEG C. The invention also provides a preparation method and application of the cyan mechanoluminescent material. According to the cyan mechanoluminescent material, Eu < 2 + > is used as a light absorption center, energy is stored in an electron trap after visible light is absorbed, and the cyan mechanoluminescent material is used for detection under a low-temperature condition and is more beneficial to damage detection application under an extremely low temperature.

Description

technical field [0001] The invention belongs to the technical field of material damage detection, and relates to a cyan mechanoluminescent material for realizing material damage detection under low temperature conditions, a preparation method and application thereof. Background technique [0002] As the load increases, the material will appear damage phenomena such as new wear, fracture, abnormal deformation, etc., which will affect the life of the material. Therefore, monitoring the damage of the material is an important means to protect related facilities. Mechanoluminescent materials are one of the commonly used materials for material damage monitoring. The principle is that there are luminescent centers and trap energy levels in mechanoluminescent materials. Under specific illumination, photoexcited electrons enter the trap energy levels and are stored. When the mechanoluminescent material is subjected to external stress, the electrons in the mechanoluminescent material ...

Claims

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Application Information

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IPC IPC(8): C09K11/59G01L1/24G01B11/16
CPCC09K11/7734C09K11/0883G01L1/24G01B11/16
Inventor 张亮亮刘雪晴张家骅吴昊武华君潘国徽
Owner CHANGCHUN INST OF OPTICS FINE MECHANICS & PHYSICS CHINESE ACAD OF SCI
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