Preparation method of singe matrix LED (light-emitting diode) fluorescent powder
A phosphor, single-matrix technology, applied in the field of single-matrix LED phosphor preparation, can solve the problems of low luminous efficiency, the luminous efficiency does not reach practical application value, the effect of the lumen efficiency of the phosphor and the color reproducibility, etc., and achieves high luminous efficiency. , the preparation method is easy to operate, and the preparation method is simple
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[0017] Such as figure 1 As shown, a method for preparing a single-substrate LED phosphor includes the following steps:
[0018] SrCO 3 , MgO, BaCO 3 , (NH 4 ) 2 HPO 4 , Eu 2 O 3 According to the mass ratio of 1:1:1:1:1~1:1:1:2:1, put it into an agate mortar and grind evenly to obtain the precursor;
[0019] Place the obtained precursor in a corundum crucible and sinter it in a muffle furnace under the reducing atmosphere provided by activated carbon;
[0020] Take out the sintered sample and grind;
[0021] After grinding, put it into the muffle furnace again for sintering. After sintering, take it out and grind to obtain the single matrix LED phosphor BaSrMg (PO 4 ) 2 :Eu 2+ .
Example Embodiment
[0022] Example 1:
[0023] Prepare 10g single matrix LED phosphor BaSrMg (PO 4 ) 2 :Eu 2+ :Add 10g SrCO 3 , 10g MgO, 10g BaCO 3 , 10g(NH 4 ) 2 HPO 4 , 10g Eu 2 O 3 Put the precursor in an agate mortar and grind uniformly to obtain the precursor; place the precursor in the corundum crucible, and put it in the muffle furnace under the reducing atmosphere provided by activated carbon. The temperature of the muffle furnace is 10℃·min -1 The temperature is increased to 800℃ and kept at a constant temperature for 2h for sintering; the sample after sintering is taken out and ground; after grinding, it is put into the muffle furnace for sintering again, and the muffle furnace is heated at 10℃·min -1 The rate of heating to 1000 ℃, keeping the constant temperature for 2h, after sintering, take out and grind to obtain single matrix LED phosphor BaSrMg (PO 4 ) 2 :Eu 2+ .
Example Embodiment
[0024] Example 2:
[0025] Prepare 10g single matrix LED phosphor BaSrMg (PO 4 ) 2 :Eu 2+ :Add 10g SrCO 3 , 10g MgO, 10g BaCO 3 , 15g(NH 4 ) 2 HPO 4 , 10g Eu 2 O 3 Put the precursor in an agate mortar and grind uniformly to obtain the precursor; place the precursor in a corundum crucible, and put it in the muffle furnace under the reducing atmosphere provided by activated carbon. The temperature of the muffle furnace is 12℃·min -1 The temperature is increased to 850℃ and kept at a constant temperature for 2.5h for sintering; the sample after sintering is taken out and ground; after grinding, it is put into the muffle furnace for sintering again, and the muffle furnace is heated at 12℃·min -1 The temperature was raised to 1200℃, kept at a constant temperature for 2.5h, and after sintering, it was taken out and ground to obtain a single matrix LED phosphor BaSrMg (PO 4 ) 2 :Eu 2+ .
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