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Red long-persistence nano-luminescent materials, its production and use

A nano-luminescent material, long afterglow technology, applied in luminescent materials, chemical instruments and methods, instruments, etc., can solve problems such as short afterglow, and achieve the effects of not easy precipitation, excellent luminescence performance, and good chemical stability

Inactive Publication Date: 2007-04-04
SHANGHAI NORMAL UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The technical problem to be solved by the present invention is to provide a red long afterglow nano-luminescent material excited by visible light and its preparation method and application, so as to overcome the short afterglow defect of the existing red luminescent material

Method used

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  • Red long-persistence nano-luminescent materials, its production and use
  • Red long-persistence nano-luminescent materials, its production and use
  • Red long-persistence nano-luminescent materials, its production and use

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] Preparation of ultra-long afterglow luminescent material (sample 1)

[0039] in Eu 2 o 3 and Dy 2 o 3(99.99% pure), Cr(NO 3 ) 3 9H 2 O, Sr(NO 3 ) 2 , Al(NO 3 ) 3 9H 2 O and H 3 BO 3 , EDTA (both analytically pure) is raw material, takes by weighing 0.3080g Cr (NO 3 ) 3 9H 2 O, 5.2908gSr(NO 3 ) 2 and 34.6995g Al(NO 3 ) 3 9H 2 O was dissolved in deionized water and weighed 0.1355g Eu 2 o 3 and 0.2872g Dy 2 o 3 Concentrated HNO 3 Heat to dissolve, mix the above solutions, then pour 34.5644g of additive EDTA into the above mixed solution, place in a constant temperature magnetic stirrer, keep heating and stirring at 80°C-90°C for 1-2 hours, adjust the pH value with ammonia water until light yellow is formed Transparent sol, and then the solution is heated or aged to obtain a gel.

[0040] The gel obtained above was calcined at 1000° C. for 2 hours, and then calcined at 1200° C. in a reducing atmosphere for 2 hours to obtain a nano-luminescent powde...

Embodiment 2-4

[0042] Preparation of ultra-long afterglow luminescent material (sample 2-4)

[0043] According to the similar method described in Example 1, the difference lies in the use of the combination contents and preparation conditions shown in Table 1. As a result, the long-lasting luminescent material (sample 2-4) of the present invention was obtained.

[0044] Example 1

Embodiment 5

[0046] The performance measurement of the sample 1 prepared by embodiment 1

[0047] In this example, the dimensions and properties of the samples prepared in Example 1 were tested.

[0048] (1) Average particle size and composition

[0049] The average particle size was determined by TEM electron microscope. The results are shown in Figure 1, indicating that the particle sizes of the samples all reached the nanoscale.

[0050] Its composition was determined by XRD powder diffraction method. The results are shown in Figure 2, indicating that the sample components meet the design requirements.

[0051] (2) Luminous properties

[0052] The result is shown in Figure 3. It shows that the sample wavelength and intensity meet the design requirements.

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PUM

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Abstract

A red long afterglow nano-luminescent material, its production and use are disclosed. The structural formula is: Sr4Al14O25:Cr3+, Eu2+ and Dy3+; it excites visible light instantaneously, afterglow time is above 10hrs and the range of grain diameter is between 30-50nm. It can be used for coating, dyes, plastics, rubber, resin composite materials, traffic sign, clock, stationery, clothing and luminescent ink.

Description

technical field [0001] The invention belongs to the field of materials, and more specifically relates to the field of nano-luminescent materials. Background technique [0002] Since the discovery of the long afterglow phenomenon in the early 20th century, the development of long afterglow materials has made great progress. The earliest long-lasting luminescent materials used as commercial products are sulfide systems doped with transition metal ions. For example, the ZnS:Cu system can produce a longer afterglow time after adding activators such as Co and Mn. However, the chemical properties of this kind of sulfide are unstable, and it will gradually decay under ultraviolet irradiation, the body color will turn black, the luminous intensity is low, and the afterglow time is only about 1h, so its application range is limited. In the mid-1990s, Japanese scientist Matsuzawa T discovered a new type of long afterglow material SrAl 2 o 4 :Eu 2+ , Dy 3+ After being excited by ...

Claims

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Application Information

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IPC IPC(8): C09K11/80G09F13/20
Inventor 彭子飞周亚丽
Owner SHANGHAI NORMAL UNIVERSITY
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