Blue-green LED (light emitting diode) light-emitting material
A luminescent material, blue-green technology, applied in the field of materials, can solve the problems of lack of spectrum, LED phosphors are difficult to achieve color rendering index, etc., and achieve good thermal stability and good brightness
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[0021] Example 1: Ba 5.99 Ga 7 Al 7 SiO 29 :The preparation example of 0.01Eu luminescent material
[0022] According to the chemical formula Ba 5.99 Ga 7 Al 7 SiO 29 : 0.01Eu composition and stoichiometric ratio Weigh europium oxide, barium carbonate, gallium oxide, alumina, silicon dioxide; then weigh 6% barium fluoride of the total weight of the raw materials; after ball milling and mixing all the raw materials, Sieving with a 120-mesh screen; put the mixed raw materials into a tube furnace, sintering at 1460°C for 8 hours under the protection of 100% nitrogen; the resulting product is ground and sieved and washed with 10% nitric acid by mass concentration. After washing with deionized water and drying to obtain Ba 5.99 Ga 7 Al 7 SiO 29 : 0.01Eu blue-green phosphor.
[0023] figure 1 Is the excitation spectrum of Example 1 of the present invention, such as figure 1 As shown, it shows that the excitation wavelength of the luminescent material is 300-450nm; figure 2 Is the emis...
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[0025] Example 2: Sr 5.99 Ga 2 Al 12 SiO 29 :The preparation example of 0.01Eu luminescent material
[0026] According to the chemical formula Sr 5.99 Ga 2 Al 12 SiO 29 : 0.01Eu composition and stoichiometric ratio Weigh europium oxide, strontium carbonate, gallium oxide, alumina, silicon dioxide; then weigh 3% barium fluoride of the total weight of the raw materials; after ball milling and mixing all raw materials, Sieved with a 120-mesh screen; put the mixed raw materials into a tube furnace and sinter at 1480°C for 10 hours under the protection of 100% nitrogen; the resulting product is ground and sieved and washed with 10% nitric acid by mass concentration. Sr is obtained by washing with deionized water and drying 5.99 Ga 2 Al 12 SiO 29 : 0.01Eu blue-green phosphor.
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[0027] Example 3: Sr 5.03 Ba 0.95 Ga 10 Al 4 SiO 29 :The preparation example of 0.02Eu luminescent material
[0028] According to the chemical formula Sr 5.03 Ba 0.95 Ga 10 Al 4 SiO 29 :The composition and stoichiometric ratio of 0.02Eu Weigh europium oxide, strontium carbonate, barium carbonate, gallium oxide, alumina, silicon dioxide; then weigh 1% barium fluoride of the total weight of the raw materials; ball mill all the raw materials After mixing, sieve with a 120 mesh screen; put the mixed raw materials into a tube furnace and sinter at 1480°C for 10 hours under the protection of 100% argon; the resulting product is ground and sieved with 10% nitric acid by mass concentration Wash, then wash with deionized water and dry to get Sr 5.03 Ba 0.95 Ga 10 Al 4 SiO 29 :0.02Eu blue-green phosphor.
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