Eureka AIR delivers breakthrough ideas for toughest innovation challenges, trusted by R&D personnel around the world.

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
View PDF5 Cites 12 Cited by
  • 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 materials of various colors
At present, blue and green long-lasting luminescent materials have become mature and have been used in actual production. However, yellow long-lasting luminescent materials are still scarce, which limits the application of long-lasting luminescent materials.

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Long-afterglow luminescent material and preparation method thereof
  • Long-afterglow luminescent material and preparation method thereof
  • Long-afterglow luminescent material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

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...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

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

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
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
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Eureka Blog
Learn More
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com