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Red long afterglow luminous material and preparing process thereof

A long afterglow luminescence, red technology, applied in the red long afterglow luminescent material and its preparation, the new red long afterglow luminescent material and its preparation field, can solve the problems of impure chromaticity, practical application is still far away, environmental pollution, etc. High energy transfer efficiency, high brightness, and the effect of improving crystal structure

Inactive Publication Date: 2009-07-22
KUNMING UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The afterglow time is not mentioned in the patent, and the chromaticity is impure, which is far from practical application and needs further research
In addition, hydrochloric acid solution is used in its preparation process, which pollutes the environment
And with Gd 2 o 2 S-based long-lasting luminescent materials are rarely reported

Method used

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  • Red long afterglow luminous material and preparing process thereof
  • Red long afterglow luminous material and preparing process thereof
  • Red long afterglow luminous material and preparing process thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] Raw material ratio:

[0024] Raw material name: Quality: Percentage of mass:

[0025] Gadolinium Oxide (Gd 2 O 3 ) 11.6545g 33.43%

[0026] Europium Oxide (Eu 2 O 3 ) 0.5955g 1.71%

[0027] Sulfur (S) 12.2500g 35.14%

[0028] Anhydrous sodium carbonate (Na 2 CO 3 ) 8.7475g 25.09%

[0029] Lithium carbonate (Li 2 CO 3 ) 1.4821g 4.25%

[0030] Titanium Dioxide (TiO 2 ) 0.1352g 0.39%

[0031] Fully grind and mix in an agate mortar, use a tablet press to press into pieces of appropriate size, put them in a corundum crucible, close the lid, heat in a high-temperature furnace, keep 350℃ for 20min, 1240℃ for 3.0h, After cooling to room temperature, the product is taken out of the oven, washed with deionized water, filtered, and dried in a constant temperature drying oven at 110°C for 3.0 hours to obtain a white powder sample Gd 2 O 2 S: Eu 3+ , Ti 4+ . After X-ray diffraction identification, as attached figure 1 As shown, the diffraction peak data of the prepared sample and Gd 2 ...

Embodiment 2

[0033] Raw material ratio:

[0034] Raw material name: Quality: Percentage of mass:

[0035] Gadolinium Oxide (Gd 2 O 3 ) 11.6545g 33.30%

[0036] Europium Oxide (Eu 2 O 3 ) 0.5955g 1.70%

[0037] Sulfur (S) 12.2500g 35.00%

[0038] Anhydrous sodium carbonate (Na 2 CO 3 ) 8.6319g 24.66%

[0039] Lithium carbonate (Li 2 CO 3 ) 1.4625g 4.18%

[0040] Magnesium oxide (MgO) 0.1352g 0.39%

[0041] Titanium Dioxide (TiO 2 ) 0.2704g 0.77%

[0042] Fully grind and mix in an agate mortar, use a tablet press to press into a suitable size tablet, put it in a small corundum crucible, cover it, and place it in a high-temperature furnace for heating, keep 300℃ for 30min, 1280℃ for 2.0 h, cooling to room temperature, the product is out of the oven, washed with deionized water, filtered, and dried in a constant temperature drying oven at 90°C for 5.0 hours to obtain a white powder sample Gd 2 O 2 S: Eu 3+ , Mg 2+ , Ti 4+ . After X-ray diffraction identification, the crystal structure of the produ...

Embodiment 3

[0044] Raw material ratio:

[0045] Raw material name: Quality: Percentage of mass:

[0046] Gadolinium Oxide (Gd 2 O 3 ) 11.6545g 33.30%

[0047] Europium Oxide (Eu2O 3 ) 0.5955g 1.70%

[0048] Sulfur (S) 12.2500g 35.00%

[0049] Anhydrous sodium carbonate (Na2CO 3 ) 8.5741g 24.50%

[0050] Lithium carbonate (Li 2 CO 3 ) 1.4527g 4.15%

[0051] Silica (SiO 2 ) 0.2028g 0.58%

[0052] Titanium Dioxide (TiO 2 ) 0.2704g 0.77%

[0053] Fully grind and mix in an agate mortar, use a tablet press to press into a piece of appropriate size, put it into a small corundum crucible, cover it, and place it in a high-temperature furnace for heating. Keep the temperature at 330°C for 25 minutes and hold at 1250°C for 2.5 h, cooling to room temperature, the product is out of the oven, washed with deionized water, filtered, and dried in a constant temperature drying oven at 100°C for 4.0 hours to obtain a white powder sample Gd 2 O 2 S: Eu 3+ , Si 4+ , Ti 4+ . After X-ray diffraction identification,...

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Abstract

The invention relates to a red long afterglow luminescent material and preparation thereof; the red long afterglow luminescent material takes Gd2O2S as a matrix and Eu as an activator and appropriately intermingles TiO2; MgO is codoped with TiO2; and SiO2 is codoped with TiO2. The composition thereof is Gd2O2S:Eu, Ti; Gd2O2S:Eu, Mg, Ti or Gd2O2S:Eu, Si, and Ti . The mass percentage content of each raw material to prepare the luminescent material is as follows: 32.27 percent to 33.98 percent of gadolinium oxide; 1.02 percent to 2.73 percent of europia, 32.0 percent to 38.0 percent of sulfur, 23.1 percent to 28.2 percent of anhydrous sodium carbonate, 3.9 percent to 4.8 percent of lithium carbonate, 0 to 0.58 percent of magnesia, 0 to 0.87 percent of silicon dioxide and 0.19 percent to 1.15 percent of titanic oxide; in addition, the mole ratio of gadolinium oxide and europia is that: n(Gd#-(2O3)):n(Eu#-(2O3)) equals to 11.50 to 32.33. The roasting temperature is 1240 DEG C to 1280 DEG C, and the heat preserving time is 2.0 to 3.0h. The emission peak value of the luminescent material is about 627nm. Through the irradiation of an ultraviolet lamp or visible light (such as the ray of the sun and a fluorescent lamp), the red long afterglow luminescent material is characterized by obvious, bright and pure red long afterglow luminescence, and can be used for emergency indicating lights, such as emergency exit direction for crowd evacuation when service interruption occurs in the public places, fire exit signs, red alert of other specific occasions, etc.

Description

Technical field [0001] The invention relates to a new type of red long afterglow luminescent material and its preparation method, in particular to Gd 2 O 2 S is the matrix, Eu 3+ Activator, doped with TiO 2 , MgO and TiO 2 Co-doped, or SiO 2 With TiO 2 A co-doped red long afterglow luminescent material and a preparation method thereof belong to the technical field of luminescent materials. Background technique [0002] Rare earth long afterglow luminescent materials have the advantages of non-toxic, harmless, non-radioactive, long luminous time, high luminous brightness, and good material stability. They are energy-saving and recyclable. They are a class of light-induced energy storage functional materials. It is used in low-light lighting, emergency indicator lights, architectural decoration, arts and crafts, information storage and high-energy ray detection. At present, blue-green and yellow-green long-lasting materials are mainly rare earth element-doped aluminates and silicat...

Claims

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Application Information

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IPC IPC(8): C09K11/84
Inventor 王飞刘利军杨斌马文会刘大春戴永年王其洪于凯立谢克强伍继君刘永成周晓奎汪竞福徐宝强秦博
Owner KUNMING UNIV OF SCI & TECH
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