Long-afterglow luminescent material and preparation method thereof

A long afterglow luminescence and general formula technology, applied in the direction of luminescent materials, chemical instruments and methods, etc., can solve the problems of limiting the application of long afterglow luminescent materials and the shortage of long afterglow luminescent materials, and achieve the effect of long afterglow time and high brightness

Active Publication Date: 2015-07-15
ZHONGKE RARE EARTH (CHANGCHUN) CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the different attenuation of long-lasting luminescent materials of various colors, it is impossible for long-lasting luminescence to achieve this goal through the three primary colors of red, green and blue. Therefore, it is necessary to develop long-lasting mater

Method used

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  • Long-afterglow luminescent material and preparation method thereof
  • Long-afterglow luminescent material and preparation method thereof
  • Long-afterglow luminescent material and preparation method thereof

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preparation example Construction

[0040]The present invention also provides a method for preparing the long-lasting luminescent material described in the above technical solution, comprising the following steps:

[0041] a) mixing a barium source, a silicon source, a europium source and a doping metal source, and roasting in a reducing atmosphere to obtain a long-lasting luminescent material;

[0042] The long afterglow luminescent material has the general formula shown in formula (I):

[0043] Ba (1-x-y) SiO 3 :xEu 2+ ,yR 3+ Formula (I);

[0044] In formula (I), R is one or more of Sc, Y, La, Ce, Pr, Nd, Gd, Tb, Dy, Ho, Er, Tm, Yb and Lu;

[0045] 0.0001≤x≤0.2; 0.0001≤y≤0.2.

[0046] In the present invention, a barium source, a silicon source, a europium source and a dopant metal source are mixed. In the present invention, the barium source preferably includes one or more of barium oxide, barium carbonate, barium phosphate, barium nitrate and barium oxalate, more preferably barium Carbonate; In a p...

Embodiment 1

[0059] Take 3.1555g BaCO 3 (analytical pure), 1.0007g SiO 2 (analytical pure), 0.0586g Eu 2 o 3 (99.99%) and 0.0561g Nd 2 o 3 (99.99%) mixed, fully ground to obtain a mixture.

[0060] Put the mixture into a corundum crucible, put the above corundum crucible with the mixture into a high-temperature furnace, and bake it at 1400°C for 6 hours in the presence of CO, cool it down to room temperature naturally, take it out and grind it, and obtain a light yellow The powdered product is the long afterglow luminescent material Ba 0.96 SiO 3 :0.02Eu 2+ ,0.02Nd 3+ .

[0061] Gained product is carried out X-ray diffraction analysis, used instrument is German Bruker / D8-FOCUS X-Ray Diffractometer, radiation source is Cu Kα1 (λ=1.5405nm), scanning range: 2θ=10 °~70 °, scanning speed 10 ° / min. See results figure 1 , figure 1 The long afterglow luminescent material and JCPDS 26-1402 card (BaSiO 3 ) XRD diffraction pattern. Depend on figure 1 It can be seen that the sample obt...

Embodiment 2

[0064] Take 3.1555g BaCO 3 (analytical pure), 1.0007g SiO 2 (analytical pure), 0.0586g Eu 2 o 3 (99.99%) and 0.0561g Nd 2 o 3 (99.99%) mixed, and added 0.02g H 3 BO 3 , fully ground to obtain a mixture.

[0065] Put the mixture into a corundum crucible, put the above corundum crucible with the mixture into a high-temperature furnace, and bake it at 1300°C for 6 hours in the presence of CO, cool it down to room temperature naturally, take it out and grind it, and get a light yellow The powdered product is the long afterglow luminescent material Ba 0.96 SiO 3 :0.02Eu 2+ ,0.02Nd 3+ .

[0066] The obtained product is carried out X-ray diffraction analysis according to the method for embodiment 1, and the result sees figure 1 . figure 1 The long afterglow luminescent material and JCPDS 26-1402 card (BaSiO 3 ) XRD diffraction pattern. Depend on figure 1 It can be seen that the sample obtained in Example 2 and BaSiO 3 have the same structure.

[0067] Excitation spe...

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Abstract

The invention provides a long-afterglow luminescent material and a preparation method thereof. The general formula of the long-afterglow luminescent material is Ba(1-x-y)SiO3:xEu2+, yR3+, wherein R is one or more of Sc, Y, La, Ce, Pr, Nd, Gd, Tb, Dy, Ho, Er, Tm, Yb and Lu, x is larger than or equal to 0.0001 and smaller than or equal to 0.2, and y is larger than or equal to 0.0001 and smaller than or equal to 0.2. The long-afterglow luminescent material regards barium metasilicate as a matrix, europium ions as activating agents and trivalent rare earth ions as auxiliary activating agents, can be effectively excited by a near infrared or visible light source to produce yellow long afterglow, and is long in afterglow time and high in luminance. The experiment result shows that the yellow long afterglow of 450 nm to 700 nm is produced after the long-afterglow luminescent material is excited, the afterglow endurance can reach 5 hours or more when the luminance is larger than 0.32 mcd/m<2>.

Description

technical field [0001] The present invention relates to the technical field of photoluminescent materials, and more specifically relates to a long-lasting luminescent material and a preparation method thereof. Background technique [0002] Long-lasting luminescent material is a material that can store the energy of external light radiation such as ultraviolet light and visible light, and then slowly release the stored energy in the form of visible light at room temperature. As a new type of energy-saving amblyopia lighting material, long afterglow luminescent material is widely used in amblyopia lighting, building flaw detection, luminous indication and other fields. [0003] The long afterglow phenomenon of long afterglow luminescent materials is produced by the impurity level caused by doping. In the excitation stage, the impurity energy level captures holes or electrons. When the excitation is completed, these electrons or holes are released due to thermal motion, and th...

Claims

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Application Information

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IPC IPC(8): C09K11/59
Inventor 李成宇贾永雷庞然姜丽宏张粟
Owner ZHONGKE RARE EARTH (CHANGCHUN) CO LTD
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