Red light-emitting phosphor powder excited by UV and blue light LED
A phosphor and ultraviolet light technology, applied in the field of phosphors, can solve the problems of uneven distribution, large particle size, uneven luminescence of phosphors, etc., and achieve the effects of sufficient reaction, uniform mixing and good chemical stability
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[0027] Example one: (Sr0.6 Ba 0.1 Mg 0.3 )(Y 0.3 Al 0.4 Ga 0.3 ) 16 O 24 :Mn 0.005 Tm 0.01 Eu 0.01
[0028] SrCO 3 8.856g Ga 2 O 3 44.98g basic magnesium 3.022g
[0029] BaCO 3 1.973g MnCO 3 0.115g
[0030] Y 2 O 3 54.19g Tm 2 O 3 0.193g
[0031] Al 2 O 3 32.64g Eu 2 O 3 0.176g
[0032] Flux 2.6g (CaF 2 , (NH 4 ) 2 HPO 4 , Li 2 CO 3 )
[0033] Put the above raw materials into a corundum ball mill jar and grind them evenly on the grinder, put them into a 95 porcelain crucible, pre-fire at 1000°C for 8 hours in an oxygen atmosphere, cool and grind at 1350°C and fire at a high temperature for 10 hours. After pulverization and sieving, the phosphor is dispersed in an ethanol medium, and classified using fluid sedimentation separation technology, and dried to obtain a material with a center particle diameter of 5.6 μm. Under the excitation of 300nm-500nm light (especially 400nm and 470nm), it presents an emission spectrum of 630nm-680nm. The peak wavelength is 654nm. Its excit...
Example Embodiment
[0034] Embodiment 2: (Sr 0.1 Ca 0.9 )(Gd 0.3 Al 0.7 ) 18 O 28 :Mn 0.03 Dy 0.02 Sm 0.01
[0035] SrCO 3 1.471g MnSO 4 .H 2 O 0.507g
[0036] CaCO 3 9.000g Dy 2 O 3 0.373g
[0037] Gd 2 O 3 97.90g Sm 2 O 3 0.174g
[0038] Al 2 O 3 64.26g
[0039] Flux 2.4g (NH 4 F 1.0g MgF 2 0.5g H 3 BO 3 0.9g)
[0040] Put the above raw materials into the corundum ball mill jar and grind them evenly on the grinder, put them into a 95 porcelain crucible, pre-fire at 1200°C for 6 hours in an oxygen atmosphere, cool and grind and fire at a high temperature at 1400°C for 6 hours. After pulverization and sieving, the phosphor is dispersed in an ethanol medium, and classified using fluid sedimentation separation technology, and dried to obtain a material with a center particle diameter of 4.8 μm. Under the excitation of 300nm-500nm light (especially 400nm and 470nm), it presents an emission spectrum of 630nm-680nm. The peak wavelength is 650nm.
Example Embodiment
[0041] Example 3: Ca(Gd 0.1 Al 0.9 ) 14 O 22 :Mn 0.005 Eu 0.01 Ho 0.02
[0042] CaCO 3 10.00g MnCO 3 0.057g
[0043] Gd 2 O 3 25.38g Eu 2 O 3 0.176g
[0044] Al 2 O 3 64.26g Ho 2 O 3 0.378g
[0045] Flux 1.9g (NH 4 Cl 0.8g NaCl 0.4g K 3 PO 4 0.7g)
[0046] Put the above raw materials into the corundum ball mill jar and grind them evenly on the grinder, put them into 95 porcelain crucibles, pre-fire at 900°C for 9 hours in an oxygen atmosphere, cool and grind and fire at 1380°C for 6 hours. After pulverization and sieving, the phosphor is dispersed in an acetone medium, and is classified by fluid sedimentation separation technology. After drying, a material with a center particle diameter of 4.0 μm is obtained. Under the excitation of 300nm-500nm light (especially 400nm and 470nm), it presents an emission spectrum of 630nm-680nm. The peak wavelength is 647.
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