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Long-persistence luminescent material and its preparing method

A technology of long afterglow luminescence and luminescent materials, applied in luminescent materials, chemical instruments and methods, etc., can solve the problems of weak recognition ability of the human eye, slow light absorption speed, less luminous color, etc., to improve the application performance of products and reduce wear brightness. Loss, powder loose and brittle effect

Active Publication Date: 2007-03-28
DALIAN LUMINGLIGHT SCIENCE & TECHNOLOGY CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In fact, under this luminance, the recognition ability of the human eye is very weak, which has great limitations for the application of long-lasting luminescent materials
[0005] 2. Poor application performance: the high luminance of luminescent materials is not equal to the high luminance of products made of luminescent materials, and the luminance of luminescent products largely depends on the compatibility of luminescent materials and the medium used to prepare luminescent material products
[0006] 3. Fast light absorption cannot be achieved: the light absorption speed of the long afterglow luminescent materials prepared by the prior art is slow under low-light lighting conditions, and it is difficult to reach saturation, which leads to poor luminous intensity and afterglow time of the luminescent materials and luminescent products. Meet the requirements in practical applications
[0007] 4. Single luminous color: few luminous colors, if you want to achieve multiple colors (emission spectrum peak wavelength 440-620nm), you must use different systems of luminescent materials to achieve
There is no luminescent material of the same system to achieve multi-color luminescence

Method used

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  • Long-persistence luminescent material and its preparing method
  • Long-persistence luminescent material and its preparing method
  • Long-persistence luminescent material and its preparing method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0069] Raw materials

[0070] The raw materials of the above composition are fully mixed by ball milling, put into the crucible, put into the electric furnace, and sintered in an oxidizing atmosphere at 900°C for 10 hours. After cooling, take out the crucible. After the sintered body in the crucible is naturally cooled to room temperature, It is sintered in a furnace filled with 95% hydrogen, 3% nitrogen and 2% hydrogen sulfide mixed gas. The furnace temperature is raised from 400°C to 1400°C within 10 hours, and the temperature is kept at 1400°C for 5 hours. . After that, the furnace temperature was reduced to 200°C within 6 hours, and the crucible was taken out. After the sintered body in the crucible was naturally cooled to room temperature, it was crushed, ground with a ball mill, and then sieved with a 325-mesh sieve for luminescent particles. Invented luminescent material SrO·0.002 SrS·Al 2 O 3 ·0.02B 2 O 3 ·0.01P 2 O 5 :0.004Eu. This material is labeled as Example...

Embodiment 1-7

[0072] The long-lasting luminescent material of Examples 2-7 with yellow-green luminescent color was prepared by using the same method as that of the luminescent material of Example 1 and compared with the comparative sample A(SrO·Al) prepared in the prior art. 2 O 3 ·0.02B 2 O 3 :0.004Eu) Comparison of long afterglow luminescent materials. The material compositions of Examples 1-7 are listed in Table 1. In Table 1 and the table of examples at the back of this specification, "comparative examples" are corresponding long-lasting luminescent materials prepared according to the prior art, and are abbreviated as "comparative samples". Table 1 shows the composition of each luminescent material and the relative brightness of the corresponding luminescent powder and luminescent film 10 minutes after stopping excitation, relative to the powder and luminescent film of Comparative Sample A indicated as 100.

[0073] Figure 1 illustrates the emission spectra of the luminescent powders of Exa...

Embodiment 8-12

[0078] The long-lasting luminescent materials of Examples 8-12 with different molar contents of europium and different molar contents of dysprosium were prepared by using the same method as the preparation of the luminescent material of Example 1, and the corresponding comparative samples were prepared according to the prior art and used the same The powder routine test and film routine test method measure the luminous brightness of these luminescent powder and luminescent film 10 minutes after stopping excitation. Table 2 lists the results of the examples and comparative samples and their relative brightness. The addition of europium with different molar content and dysprosium with different molar content has been a consensus in the industry on the influence of the long-lasting luminescent material, which can make the powder body and the luminescent film of the long-lasting luminescent material have different brightness. In the present invention, due to the addition of sulfur and...

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Abstract

The invention relates to long afterglow luminescent material. Its expression is as follows: a MO.b M'(S beta Se1-beta).c Al2O3.d B2O3.eP2O5: x Eu.y Ln, whose M is selected from one or many elements combination of Sr, Ca, Ba, Mg; M' is selected from one or many elements combination of Sr, Ca, Ba; ln can be one or many elements combination of Nd, Dy, Tm, La, Ce, Pr etc; a, b, c, d, e, x, and y are mol coefficients and their range are respectively as follows: a is more than 0.5 and less than 6.0; b is not less than 0.0001 and not more than 2.0; c is not less than 0.5 and not more than 9.0; d is not less than 0 and not more than 1.0; e is that as the d; x is not less than 0.00001 and not more than 0.25; y is not less than 0.00001 and not more than 0.3; beta is not less than 0 and not more than 1.0; the sum of the a and b is more than 0.5 and not more than 6.0; the sum of the d and e is not less than 0 and not more than 1.0. The preparing method is high temperature solid phase reaction for first oxidation, and then reduction.

Description

Technical field [0001] The present invention is a long-lasting luminescent material, and particularly relates to a composite aluminate luminescent material containing sulfur and / or selenium, or containing sulfur and / or selenium and phosphorus elements and activator ions, and a method for manufacturing the same. Background technique [0002] Since the invention of the traditional ZnS series of long afterglow luminescent materials in the 19th century, through continuous improvement, several typical products have been formed, such as: ZnS: Cu (green emission), (CaSr)S: Bi (blue emission), ( ZnCd)S:Cu (yellow-orange luminescence), and used in some commercial fields, but the shortcomings of this type of material are poor stability, easy to decompose in the air, easy to gray to black under sunlight, and short afterglow time. Generally within 0.5-2 hours, and the luminous brightness is low, which cannot meet the requirements of practical applications. In order to improve the brightness ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K11/80
CPCC09K11/7738C09K11/7797C09K11/774C09K11/886C09K11/7796C09K11/7795C09K11/55
Inventor 夏威罗昔贤肖志国于晶杰柴旗
Owner DALIAN LUMINGLIGHT SCIENCE & TECHNOLOGY CO LTD
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