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
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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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