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A kind of cyan electroluminescent material applied to low temperature detection and its preparation method and application

A luminescent, cyan technology, applied in the field of cyan mechanoluminescent materials and their preparation, can solve the problems of lack of low-temperature trap levels, decreased application sensitivity, and loss of stress detection capabilities

Active Publication Date: 2022-03-22
CHANGCHUN INST OF OPTICS FINE MECHANICS & PHYSICS CHINESE ACAD OF SCI
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  • 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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  • A kind of cyan electroluminescent material applied to low temperature detection and its preparation method and application
  • A kind of cyan electroluminescent material applied to low temperature detection and its preparation method and application
  • A kind of cyan electroluminescent material applied to low temperature detection and its preparation method and application

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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 under the low temperature condition of -270°C to -50°C, and its general chemical formula is Ba (1‑X) Si 2 O 2 N 2 :Eu 2+ (X) , where the value range of X is: 0.0001≤X≤0.5, and the trap distribution range is from -270°C to 400°C. The present invention also provides the preparation method and application of the above-mentioned cyan electroluminescent material. Cyan mechanoluminescent material of the present invention uses Eu 2+ As a light absorption center, after absorbing visible light, the energy is stored in the electron trap, which is used for detection applications under low temperature conditions, and is more conducive to damage detection applications at extremely low temperatures.

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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Patent Type & Authority Patents(China)
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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