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Method for preparing high-brightness red light long afterglow luminous material

A luminous 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, high fluorescence brightness and wide application value

Active Publication Date: 2016-10-12
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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  • Method for preparing high-brightness red light long afterglow luminous material
  • Method for preparing high-brightness red light long afterglow luminous material
  • Method for preparing high-brightness red light long afterglow luminous material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

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

[0020] Slowly pour 100g of SAOED, a yellow-green light long afterglow luminous material, into the above-mentioned sol solution, continue heating and stirring until SAOED begins to expand and loosen, forming a flocculent gel; place the flocculent gel of SAOED in a closed environment at room temperature, and age After 20 hours, put it into a constant temperature blast drying oven, and dry it at 60°C for 24 hours; after the gel is completely dry, put it in a tubular high-temperature calciner, cal...

Embodiment 2

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

[0023] Slowly pour 100g of the yellow-green long-lasting luminous material SAOED into the above-mentioned sol solution, and continue heating and stirring until the SAOED begins to expand and loosen to form a flocculent gel; place the flocculent gel of SAOED in a closed environment at room temperature, After melting for 24 hours, put it into a constant temperature blast drying oven, and dry it at 70°C for 20 hours; after the gel is completely dry, put it in a tube-type high-temperature calciner, calci...

Embodiment 3

[0025] Weigh 0.7g red fluorescent dye and dissolve it in 209.66g deionized water; weigh 69.34g tetraethyl orthosilicate (TEOS) and dissolve it in 460g dehydrated ethanol; then add the mixed solution of TEOS and dehydrated ethanol to the above deionized water In deionized water, use nitric acid HNO 3 Adjust the pH value of the mixed solution to 3, and magnetically stir for 20 minutes at 70°C and a stirring speed of 420 rpm to allow TEOS to fully hydrolyze and form a uniform and transparent sol;

[0026] Slowly pour 100g of the yellow-green long-lasting luminous material SAOED into the above-mentioned sol solution, and continue heating and stirring until the SAOED begins to expand and loosen to form a flocculent gel; place the flocculent gel of SAOED in a closed environment at room temperature, After melting for 24 hours, put it into a constant temperature blast drying oven, and dry it at 80°C for 20 hours; after the gel is completely dry, put it in a tubular high-temperature ca...

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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 afterglow luminous material, which belongs to the field of fluorescent material preparation. Background technique [0002] Long afterglow luminous material is a luminescent material that can realize light energy absorption-storage-release. It can absorb and store sunlight energy in the internal lattice. When the excitation light source is removed, it can continuously emit light Form releases stored energy. In addition, this fluorescent material can also be recycled repeatedly. After years of research, researchers have prepared a variety of long afterglow materials, including rare earth-doped aluminate, silicate, and titanate-based long afterglow 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 advantage...

Claims

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Application Information

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IPC IPC(8): C09K11/80C09K11/06
CPCC09K11/06C09K11/7792C09K2211/1088
Inventor 陈志葛明桥
Owner JIANGNAN UNIV
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