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Preparation method of high brightness red light long afterglow luminous material

A luminescent material and red light technology, which is applied in the direction of luminescent materials, chemical instruments and methods, can solve the problems of short fluorescence intensity and afterglow time, and achieve the effects of long afterglow time, simple preparation process and high fluorescence brightness

Active Publication Date: 2018-05-08
JIANGNAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, there have been many reports on blue and green long-lasting luminous materials, but the fluorescence intensity and short afterglow time of the reported red luminous materials are far lower than those of blue and green long-lasting luminous materials.

Method used

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  • Preparation method of high brightness red light long afterglow luminous material
  • Preparation method of high brightness red light long afterglow luminous material
  • Preparation method of high brightness red light long afterglow luminous material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] Weigh 0.3g of red fluorescent dye and dissolve in 104.83g of deionized water; Weigh 34.67g of tetraethylorthosilicate (TEOS) and dissolve in 230g of absolute ethanol; then add the mixed solution of TEOS and absolute ethanol to the above In ionized water, adjust the pH of the mixed solution to 2 with nitric acid, and stir it magnetically for 30 minutes at 60°C and a stirring speed of 400 rpm to allow TEOS to be fully hydrolyzed to form a uniform and transparent sol;

[0020] Slowly pour 100g of SAOED, a yellow-green light-long afterglow luminous material, into the above sol solution, continue heating and stirring until SAOED begins to swell and loosen and form a flocculent gel; place the flocculent gel of SAOED in a sealed environment at room temperature and age After 20h, put it in a constant temperature blast drying oven, dry at 60℃ for 24h; after the gel is completely dried, put it in a tubular high-temperature calciner, calcined at 300℃ for 3h, take it out, filter with d...

Embodiment 2

[0022] Weigh 0.5g red fluorescent dye and dissolve it in 157.28g deionized water; weigh 52g tetraethylorthosilicate (TEOS) and dissolve it in 345g absolute ethanol; then add the mixed solution of TEOS and absolute ethanol to the above In ionized water, adjust the pH of the mixed solution to 3 with nitric acid, and stir it magnetically for 25 minutes at 70°C and stirring speed of 460 rpm to allow TEOS to be fully hydrolyzed to form a uniform and transparent sol;

[0023] Pour 100g of SAOED, a yellow-green light long afterglow luminous material, slowly into the above sol solution, continue to heat and stir until SAOED begins to swell and loosen and form a flocculent gel; place the flocculent gel of SAOED in a closed environment at room temperature, After 24h, put it in a constant temperature blast drying oven and dry at 70℃ for 20h; after the gel is completely dried, put it in a tubular high-temperature calciner, calcined at 250℃ for 4h, take it out, filter with deionized water, and...

Embodiment 3

[0025] Weigh 0.7g red fluorescent dye and dissolve it in 209.66g deionized water; weigh 69.34g tetraethylorthosilicate (TEOS) and dissolve it in 460g absolute ethanol; then add the mixed solution of TEOS and absolute ethanol to the above Ionized water with HNO 3 Adjust the pH of the mixed solution to 3, and stir it magnetically for 20 minutes at 70°C and a stirring speed of 420 rpm to allow TEOS to be fully hydrolyzed to form a uniform and transparent sol;

[0026] Pour 100g of SAOED, a yellow-green light long afterglow luminous material, slowly into the above sol solution, continue to heat and stir until SAOED begins to swell and loosen and form a flocculent gel; place the flocculent gel of SAOED in a closed environment at room temperature, After 24h, put it in a constant temperature blast drying oven and dry at 80℃ for 20h; after the gel is completely dried, put it in a tubular high-temperature calciner, calcined at 260℃ for 4h, take it out, filter with deionized water, and dry ...

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Abstract

The invention relates to a method for preparing a high-brightness red light long afterglow luminous material. The method comprises the following steps: (1) dissolving a red fluorescent dye in deionized water, then adding a mixed solution of tetraethyl orthosilicate and absolute ethyl alcohol in deionized water, adjusting the pH value of the mixed solution to 2-3, and carrying out magnetic stirring for 20-30 minutes under conditions of the temperature of 60-70 DEG C and the stirring speed of 400 r / min, to form a uniform and transparent sol solution; (2) pouring a yellow green light long afterglow luminous material into the sol solution of the step (1), and carrying out magnetic heating stirring for 5-10 minutes, to form a flocculent gel; and (3) placing the flocculent gel of the step (2) in a room-temperature closed environment, aging for 20-24 h, then putting the aged product into a drying box, and drying for 20-24 h at the temperature of 60-80 DEG C; and then calcining the dried product for 3-4 h at the temperature of 300 DEG C in a calcining furnace, then taking out the calcined product, carrying out suction filtration of the calcined product with deionized water, and drying the product. The prepared red light long afterglow luminous material has the advantages of high fluorescent brightness, long afterglow time, no toxicity, no radioactivity, simple preparation process and the like.

Description

Technical field [0001] The invention relates to a preparation method of a luminous material, in particular to a preparation method of a red light long-lasting luminous material, and belongs to the field of fluorescent material preparation. Background technique [0002] Long afterglow luminous material is a kind of luminescent material that can realize light energy absorption-storage-release. It can absorb and store sunlight energy in the internal crystal lattice. When the excitation light source is removed, it can continue to fluoresce Form to release stored energy. In addition, this fluorescent material can be reused repeatedly. After years of research, researchers have prepared a variety of long-lasting materials, including rare-earth-doped aluminates, silicates, and titanate-based long-lasting materials. Among them, the yellow-green light long afterglow material SrAl 2 O 4 :Eu 2+ ,Dy 3+ (Hereinafter referred to as SAOED) is the most representative due to its high fluorescenc...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09K11/80C09K11/06
CPCC09K11/06C09K11/7792C09K2211/1088
Inventor 陈志葛明桥
Owner JIANGNAN UNIV
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