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Yellow long afterglow light-emitting material and preparing method thereof

A technology of long afterglow luminescence and long afterglow materials, which is applied in the direction of luminescent materials, chemical instruments and methods, etc. It can solve the problems of unpublished afterglow time, initial brightness of afterglow, difficult materials, waste of energy, etc., and achieve long afterglow duration and excellent preparation method Simple, good color purity effect

Inactive Publication Date: 2012-09-12
LANZHOU UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, it is very difficult to obtain a yellow long-lasting material
[0003]Patent "Red Rare Earth Long Afterglow Phosphor" (Patent No. and production method" (patent number ZL200410020722.X, announcement number CN1266250, announcement date 2006.07.26) and patent application "La2O2S red long afterglow luminescent material and Its preparation method" (application number 200410017538.X, publication number CN1563273, publication date 2005.01.12) discloses long-lasting luminescent materials based on sulfur oxides, which are prone to generate sulfur-containing harmful gases during the preparation process
And none of the above patents has published the afterglow time and the initial brightness of the afterglow
Patent "Orange Yellow Long Persistence Phosphor Powder and Its Preparation Method" (Patent No. ZL200710056035.7, Announcement No. CN100575452, Announcement Date 2009.12.30) discloses an orange-yellow phosphor with Eu2+ activated ion Long afterglow luminescent material, its main chemical composition is expressed as: Sr3SiO5: Eu, Dy, the temperature required for the preparation of this material is high, wasting a lot of energy , which increases the manufacturing cost of the material
In addition, the afterglow time of the material is 5 hours, which is relatively short, which is not conducive to industrialization

Method used

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  • Yellow long afterglow light-emitting material and preparing method thereof
  • Yellow long afterglow light-emitting material and preparing method thereof
  • Yellow long afterglow light-emitting material and preparing method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0042] According to Ca 1.98 BO 3 Cl: Eu 0.01 , Dy 0.01 The molecular formula weighs 1.4813gCaCO respectively 3 , 0.5549gCaCl 2 , 0.6183gH 3 BO 3 , 0.0176gEu 2 o 3 and 0.0186gDy 2 o 3 Add appropriate amount of alcohol to the weighed raw material and grind it in a mortar, mix it evenly, put it into an alumina crucible, put it in a tube furnace, and bake it for 4 hours at a temperature of 900 ° C and a reducing atmosphere. , the reducing atmosphere used is composed of 5%H by volume percentage 2 and 95%N 2 composition. After the calcination is completed, it is cooled to room temperature with the furnace, and the long afterglow material is obtained after grinding.

[0043] The X-ray diffraction pattern of the obtained long afterglow material is as follows: figure 1 It can be seen from the figure that the diffraction peaks of the sample are in good agreement with the PDF standard card. Illustrate that adopting the sample that the inventive method makes is all Ca 2 BO...

Embodiment 2

[0047] According to Ca 1.998 BO 3 Cl: Eu 0.001 , Dy 0.001 The molecular formula weighs 1.4993gCaCO respectively 3 , 0.6103gCaCl 2 , 0.3829gB 2 o 3 , 0.0018gEu 2 o 3 and 0.0017 g CeO 2 , where CaCl 2 and B 2 o 3 An excess of 10% is used to compensate for the volatilization during the calcination process. Add an appropriate amount of alcohol dropwise to the weighed raw materials and grind them in a mortar. After mixing evenly, put them into an alumina crucible and place them in a tube furnace. and roasting for 1 hour under the condition of introducing a reducing atmosphere, in the presence of 25%H 2 and 75%N 2 Insulated under the reducing atmosphere for 1h, the reducing atmosphere used was changed from 25%H 2 and 75%N 2 After the calcination is completed, it is cooled to room temperature with the furnace, and the yellow long afterglow material is obtained after grinding.

Embodiment 3

[0049] According to Ca 1.96 BO 3 Cl: Eu 0.02 , Nd 0.01 , Tm 0.01 Weigh 0.3979gCaO, 0.3608gCaCl respectively 2 , 0.3413gH 3 BO 3 , 0.0352gEu 2 o 3 , 0.0168gNd 2 o 3 and 0.0193gTm 2 o 3 , where CaCl 2 Excess 30%, H 3 BO 3 An excess of 20% is used to compensate for the volatilization during the calcination process. Add an appropriate amount of alcohol to the weighed raw material and grind it in a mortar. Under the condition of roasting for 2.5 hours, the reducing atmosphere used was 5% CO and 95% N by volume. 2 After the calcination is completed, it is cooled to room temperature with the furnace, and the yellow long afterglow material is obtained after grinding.

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Abstract

The invention provides a yellow long afterglow light-emitting material and a preparing method thereof. The molecular formula of the yellow long afterglow material is Ca2-x-yBO3Cl: Eux, Lny, wherein Ln is one or more of La, Ce, Pr, Nd, Sm, Gd, Tb, Dy, Ho, Er, Tm, Yb, Lu, Y and Mn; x is greater than or equal to 0.0005 and less than or equal to 0.05, and y is also greater than or equal to 0.0005 and less than or equal to 0.05; when Ln is the combination of a plurality of raw materials; and all the raw materials are blended in any ratio. The yellow long afterglow light-emitting material is prepared through the following steps of: weighing the corresponding raw materials in a stoichiometric ratio, feeding the raw materials after being ground into a reducing atmosphere environment for roasting, naturally cooling to the room temperature, and then carrying out grinding. The method for preparing the yellow long afterglow light-emitting material is simple, free of pollution and low in cost.

Description

technical field [0001] The invention belongs to the technical field of luminescent materials, and relates to a long afterglow luminescent material, in particular to a yellow long afterglow luminescent material which can emit a persistent and visible yellow afterglow after being excited by ultraviolet light or visible light; the invention also relates to a long afterglow yellow luminescent material Preparation method of luminescent material. Background technique [0002] Long afterglow luminescent materials are also called light storage materials or luminous materials, which refer to the light that stores a part of light energy under the irradiation of natural light or other artificial light sources, and can still slowly release this energy in the form of visible light when the light source is removed. Luminescent materials. Long afterglow luminescent materials have now been widely used in emergency indication equipment, low-light lighting, handicrafts, decorative materials ...

Claims

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Application Information

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IPC IPC(8): C09K11/63
Inventor 王育华曾巍陈文波王彦照韩少春
Owner LANZHOU UNIVERSITY
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