A kind of fluorescent powder based on ultraviolet light or blue light excitation and its preparation method and application
A technology of blue light excitation and fluorescent powder, which is applied in the field of fluorescent materials, can solve the problems of low luminous efficiency, achieve high luminous intensity, wide range of emission wavelengths, and simple methods
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[0025] Example 1
[0026] A phosphor powder based on ultraviolet or blue light excitation, the material chemical formula is: (M 3-x Mn x )(R 2-y Ce y )(Si, Ge) 3 O 12 , wherein when M=Ca and Sr in the chemical formula, R=Sc, x=0.1, y=0.0001, the preparation molecular formula is (Ca 2.5 Sr 0.4 Mn 0.1 )(Sc 1.9999 Ce 0.0001 )(Si 2.7 Ge 0.3 )O 12 phosphor.
[0027] Weigh 2.5mol CaCO in molar ratio 3 , 0.4molSrCO 3 , 0.1molMnCO 3 , 0.99995molSc 2 O 3 , 0.0001molCeO 2 , 2.7molSiO 2 , 0.3molGeO 2 , after mixing and grinding evenly, placed in a high-purity corundum crucible, placed in a high-temperature tubular furnace for calcination under hydrogen reducing atmosphere, and calcined at 1400 ° C for 4 hours to obtain (Ca 2.5 Sr 0.4 Mn 0.1 )(Sc 1.9999 Ce 0.0001 )(Si 2.7 Ge 0.3 )O 12 phosphor.
Example Embodiment
[0028] Example 2
[0029] A phosphor powder based on ultraviolet or blue light excitation, the material chemical formula is: (M 3-x Mn x )(R 2-y Ce y )(Si, Ge) 3 O 12 , wherein when M=Ca and Sr, R=Sc, x=0.1, y=0.1 in the chemical formula, the preparation molecular formula is (Ca 2.5 Sr 0.4 Mn 0.1 )(Sc 1.9 Ce 0.1 )(Si 2.7 Ge 0.3 )O 12 phosphor.
[0030] Weigh 2.5mol CaCO in molar ratio 3 , 0.4molSrCO 3 , 0.1molMnCO 3 , 0.95molSc 2 O 3 , 0.1molCeO 2 , 2.7molSiO 2 , 0.3molGeO 2 , after mixing and grinding evenly, placed in a graphite crucible, placed in a high-temperature tube furnace for calcination under hydrogen reducing atmosphere, and calcined at 1400 ° C for 4 hours to obtain (Ca 2.5 Sr 0.4 Mn 0.1 )(Sc 1.9 Ce 0.1 )(Si 2.7 Ge 0.3 )O 12 phosphor. figure 1 is the excitation spectrum (λ) of the phosphor in the embodiment of the present invention em =575nm) schematic diagram; figure 2 is the emission spectrum (λ) of the phosphor in the embodiment ...
Example Embodiment
[0031]Example 3
[0032] A phosphor powder based on ultraviolet or blue light excitation, the material chemical formula is: (M 3-x Mn x )(R 2-y Ce y )(Si, Ge) 3 O 12 , wherein when M=Ca and Sr, R=Sc, x=0.1, y=0.5 in the chemical formula, the preparation formula is (Ca 2.5 Sr 0.4 Mn 0.1 )(Sc 1.5 Ce 0.5 )(Si 2.7 Ge 0.3 )O 12 phosphor.
[0033] Weigh 2.5mol CaCO in molar ratio 3 , 0.4molSrCO 3 , 0.1molMnCO 3 , 0.75molSc 2 O 3 , 0.5molCeO 2 , 2.7molSiO 2 , 0.3molGeO 2 , after mixing and grinding evenly, placed in a platinum crucible, placed in a high-temperature tube furnace for calcination under hydrogen reducing atmosphere, and calcined at 1400 ° C for 4 hours to obtain (Ca 2.5 Sr 0.4 Mn 0.1 )(Sc 1.5 Ce 0.5 )(Si 2.7 Ge 0.3 )O 12 phosphor.
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