Method for producing ultraviolet light excitated single phase white radiation fluorescent powder
A fluorescent powder and ultraviolet light technology, applied in chemical instruments and methods, luminescent materials, etc., can solve the problems of high reaction energy consumption, easy generation of heterogeneous phases, uneven mixing of raw materials, etc., to achieve good luminescence performance, easy to obtain raw materials, Operational Security Effects
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[0029] Example 1Sr 0.995 Eu 0.005 Zn 1.995 Mn 0.005 (PO 4 ) 2
[0030] Weigh SrCO 3 (Analytical pure) 2.938g, ZnO (Analytical pure) 3.247g, MnCO 3 (99.99%) 0.0115g and Eu 2 O 3 (99.99%) 0.0176g. The above raw materials are dissolved in excess concentrated nitric acid. After mixing the solution thoroughly, 0.55 g of salicylic acid complexing agent is added. After stirring evenly, add 0.24g of urea, 0.3g of PEG, NH to the solution 4 H 2 PO 4 (Analytical purity) 4.601g, and stir well. Heat the solution at 60°C until all the water in the solution is evaporated to form a gel. In the process of heating the solution, add ammonia water to the solution to control the pH of the solution to about 4. The obtained gel was burned in an air atmosphere at 900° C. for 5 hours to obtain a precursor powder. The obtained precursor powder is sintered in a reducing atmosphere at 1000° C. for 2 hours to obtain the desired phosphor.
[0031] figure 1 It is the excitation spectrum of the phosphor, whic...
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[0032] Example 2Sr 0.99 Eu 0.01 Zn 1.99 Mn 0.01 (PO 4 ) 2
[0033] Weigh SrCO 3 (Analytical grade) 2.923g, ZnO (Analytical grade) 3.239g, MnCO 3 (99.99%) 0.023g and Eu 2 O 3 (99.99%) 0.0352g. The above raw materials are dissolved in excess concentrated nitric acid. After mixing the solution thoroughly, 0.7 g of salicylic acid complexing agent is added. After stirring evenly, add 0.6g urea, 0.3g PEG, NH to the solution 4 H 2 PO 4(Analytical purity) 4.601g, and stir well. Heat the solution at 70°C until all the water in the solution is evaporated to form a gel. In the process of heating the solution, add ammonia water to the solution to control the pH of the solution to about 7. The obtained gel was burned in an air atmosphere at 900°C for 2 hours to obtain a precursor powder. The obtained precursor powder is sintered in a reducing atmosphere at 1000° C. for 15 hours to obtain the desired phosphor.
[0034] figure 2 It is the excitation spectrum of the phosphor, which exhibits th...
Example Embodiment
[0035] Example 3Sr 0.99 Eu 0.01 Zn 1.99 Mn 0.01 (PO 4 ) 2
[0036] Weigh SrCO 3 (Analytical grade) 2.923g, ZnO (Analytical grade) 3.223g, MnCO 3 (99.99%) 0.046g and Eu 2 O 3 (99.99%) 0.0352g. The above raw materials are dissolved in an excess of concentrated nitric acid. Mix the solution thoroughly and add 2 g of salicylic acid complexing agent. After stirring evenly, add 1g of urea, 1g of PEG, and NH to the solution 4 H 2 PO 4 (Analytical purity) 4.601g, and stir well. Heat the solution at 90°C until all the water in the solution is evaporated to form a gel. In the process of heating the solution, add ammonia water to the solution to control the pH of the solution to about 5. The obtained gel was burned in an air atmosphere at 900° C. for 3 hours to obtain a precursor powder. The obtained precursor powder is sintered in a reducing atmosphere at 1000° C. for 25 hours to obtain the desired phosphor.
[0037] Figure 4 It is the excitation spectrum of the phosphor, which exhibits ...
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