A kind of Eu-doped aluminosilicate fluorescent material with high-efficiency blue light emission and preparation method thereof

A fluorescent material, aluminosilicate technology, applied in the direction of luminescent materials, chemical instruments and methods, etc., can solve the problems of expensive preparation facilities, uneven atmosphere contact, safety problems of reducing gas, etc., and achieve good ultraviolet absorption and product physicochemical The effect of stable performance and safety guarantee

Active Publication Date: 2019-01-11
NANCHANG UNIV
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  • Description
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  • Application Information

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Problems solved by technology

Europium ions exist in trivalent in nature, and Eu 2+ doped phosphor, Eu 2+ Ions are mainly obtained by high-temperature solid-phase method in reducing atmosphere or inert atmosphere. Products obtained by high-temperature solid-phase method in reducing or inert atmosphere usually have good reducibility, but there are also There are certain defects, such as uneven contact with the atmosphere, expensive preparation facilities, safety issues of reducing gases, etc.

Method used

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  • A kind of Eu-doped aluminosilicate fluorescent material with high-efficiency blue light emission and preparation method thereof
  • A kind of Eu-doped aluminosilicate fluorescent material with high-efficiency blue light emission and preparation method thereof
  • A kind of Eu-doped aluminosilicate fluorescent material with high-efficiency blue light emission and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] Weigh (MgCO 3 ) 4 Mg(OH) 2 • 5H 2 O: 0.4879g, Al 2 o 3 : 0.5121 g, Eu 2 o 3 : 0.0177 g, SiO 2 : 0.1509 g Total 1.1608 g. In this embodiment, the heat treatment temperature is 1000° C., and the reaction time is 20 h. X-ray diffraction results (such as figure 1 shown) shows that the sample is mainly MgAl 2 o 4 with a small amount of Mg 2 Al 2 SiO 7 Mutually. After grinding, measure its emission spectrum at room temperature with F-4600 fluorescence spectrophotometer (e.g. figure 2 shown). Under the excitation of 365nm near-ultraviolet light, Eu was detected 2+ : 5 d →4 f slightly stronger broadband emission, while Eu 3+ : 5 D. 0 − 7 f J (J = 0,1,2,3,4) the emission intensity is very weak, indicating that the incorporated Eu 3+ Partially self-reduced to Eu 2+ , and its emission spectrum color coordinate position is: x=0.1782 y=0.0868 (such as image 3 ), located in the blue light area, the fluorescent material emits a slightly stronger blue ligh...

Embodiment 2

[0025] Weigh (MgCO 3 ) 4 Mg(OH) 2 • 5H 2 O: 0.4879g, Al 2 o 3 : 0.5121 g, Eu 2 o 3 : 0.0177 g, SiO 2 : 0.3017 g, a total of 1.3194 g. In this embodiment, the heat treatment temperature is 1100° C., and the reaction time is 15 hours. X-ray diffraction results (such as figure 1 shown) shows that the sample except MgAl 2 o 4 with Mg 2 Al 2 SiO 7 A new phase MgAl 2 Si 2 o 8 . After grinding, measure its emission spectrum at room temperature with F-4600 fluorescence spectrophotometer (e.g. figure 2 shown). Under the excitation of 365nm near-ultraviolet light, Eu was detected 2+ : 5 d →4 f Strong broadband emission, while Eu 3+ : 5 D. 0 − 7 f J (J = 0,1,2,3,4) the emission intensity is very weak, indicating that the incorporated Eu 3+ More has been self-reduced to Eu 2+ , and its emission spectrum color coordinate position is: x=0.1681 y=0.0771 (such as image 3 ), located in the blue light region with a shorter wavelength, and the fluorescent materia...

Embodiment 3

[0027] Weigh (MgCO 3 ) 4 Mg(OH) 2 • 5H 2 O: 0.4879g, Al 2 o 3 : 0.5121 g, Eu 2 o 3 : 0.0177 g, SiO 2 : 0.4526 g Total 1.4703 g. In this embodiment, the heat treatment temperature is 1300° C., and the reaction time is 10 h. X-ray diffraction results (such as figure 1 shown) shows that the sample MgAlO 4 Phase reduction, while Mg 2 Al2 SiO 7 , MgAl 2 Si 2 o 8 phase increase. After grinding, measure its emission spectrum at room temperature with F-4600 fluorescence spectrophotometer (e.g. figure 2 shown). Under the excitation of 365nm near-ultraviolet light, Eu was detected 2+ : 5 d →4 f Strong broadband emission, while Eu 3+ : 5 D. 0 − 7 f J (J = 0,1,2,3,4) the emission intensity is very weak, indicating that the incorporated Eu 3+ A large fraction is self-reduced to Eu 2+ , its emission spectrum color coordinate position is: x= 0.1632 y= 0.0772 (such as image 3 ), located in the blue light area, the fluorescent material emits strong blue light vis...

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Abstract

The invention relates to a Eu-doped efficient-blue-light-emission aluminosilicate fluorescent material and a preparation method. According to the fluorescent material, raw materials consist of (MgCO3)4Mg(OH)2.5H2O and Al2O3 which are in the mole ratio of 0.2: 1, and dopants are Eu2O3 and SiO2; and a chemical formula of the fluorescent material is MgAl2SinO(2n+4):Eu, wherein n is 5, 1, 1.5 or 2. The preparation method comprises the preparation steps: mixing the raw materials according to a proportioning ratio, and then, carrying out grinding continuously until the material is mixed uniformly; and loading the mixture to a corundum crucible, carrying out a solid-phase reaction for 8 to 20 hours in an air atmosphere at the temperature of 1,000 DEG C to 1,300 DEG C in a muffle furnace, taking out a reaction product when the temperature is cooled to 900 DEG C through furnace cooling, cooling the reaction product to room temperature, and carrying out uniform grinding, thereby obtaining a sample. According to the aluminosilicate fluorescent material and the preparation method, the preparation process is simple and is low in cost, the aluminosilicate fluorescent material is non-toxic and pollution-free, and the physico-chemical properties of the product are stable; the requirements on equipment, particularly sealing performance, are relatively low; the safety is high, and mass production is easy; and the prepared fluorescent material has the advantages that Eu<2+> emission in an aluminate substrate is broadband emission, the intensity of emission is high, and the ultraviolet absorption is good.

Description

technical field [0001] The invention belongs to the field of solid luminescent materials. Background technique [0002] Eu 2+ ions are important low-priced rare earth ions, Eu 2+ Doped solid compounds have shown many excellent properties as fluorescent materials, and have been widely used in high-tech fields such as laser, fluorescence, photoluminescence and electroluminescence. Europium ions exist in trivalent in nature, and Eu 2+ doped phosphor, Eu 2+ Ions are mainly obtained by high-temperature solid-phase method in reducing atmosphere or inert atmosphere. Products obtained by high-temperature solid-phase method in reducing or inert atmosphere usually have good reducibility, but there are also There are certain defects, such as uneven contact with the atmosphere, expensive preparation facilities, safety issues of reducing gases, etc. The principle of self-reduction is that the structural modulation occurs uniformly throughout the material, which ensures the uniformit...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09K11/64
CPCC09K11/7734
Inventor 于立新李宋楚满孝琴
Owner NANCHANG UNIV
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