Blue-purple light or blue light excitation fluorophor, preparation method thereof, and packaged white light diode
A blue light excitation and phosphor technology, applied in the field of white light diodes, can solve the problems of uneven composition, instability and toxic hydrolysis conditions of the phosphor, and achieve the effects of stable color coordinates, high manufacturing efficiency and excellent characteristics
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[0025] Example 1
[0026] According to the composition of the phosphor and the process flow in Figure 1, take a = 0.0, b = 0.05, c = 0.0, d = 0.0, and e = 0.0. Weigh the analytically pure strontium nitrate with a purity of 99.9% and an average size of 10 Nano SiO 2 Put it into a beaker with the spectrally pure europium nitrate. According to the solid:liquid volume ratio=1:10, add deionized water, mechanically stir, titrate with a 30% nitric acid aqueous solution to pH=1, and stir for 3 hours to obtain a composite silica sol. The composite silica sol is sprayed and granulated, and the compressed air temperature is set to 110°C at the inlet temperature and the dry air volume is 100m 3 / h, the material flow is 1L / h, and the dry gel particles are obtained; the dry gel particles are put into a corundum crucible and pre-fired in a common muffle furnace at a temperature of 600°C for 3 hours, and the pre-fired powder is obtained after natural cooling. Place the crucible containing the pre...
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[0028] Example 2
[0029] According to the composition of the phosphor and the process flow of Figure 1, take a = 0.1, b = 0.1, c = 0.05, d = 0.0, c: e = 10:1, weigh the analytically pure strontium nitrate and barium nitrate, and their purity 99.9% SiO with an average size of 10 nanometers 2 And spectrally pure Ce with an average size of 50 nanometers 2 O 3 , Analytical pure lithium nitrate and spectrally pure europium nitrate are put into a beaker together. According to the solid:liquid volume ratio=1:15, add deionized water, mechanically stir, titrate with a 30% nitric acid aqueous solution to pH=2, and stir for 5 hours to obtain a composite silica sol. The composite silica sol is sprayed and granulated, and the compressed air temperature is set to an inlet temperature of 150°C, and the amount of dry air is 150m. 3 / h, the material flow is 2L / h, and the dry gel particles are obtained; the dry gel particles are put into a corundum crucible and pre-fired in a common muffle furnace ...
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[0030] Example 3
[0031] According to the composition of the phosphor and the process flow of Figure 1, take a = 0.0, b = 0.0, c = 0.1, d = 0.0, c: e = 1: 0.05, and weigh the analytically pure strontium nitrate with a purity of 99.9% SiO with an average size of 10 nanometers 2 And spectrally pure Ce with an average size of 50 nanometers 2 O 3 Analyze pure lithium nitrate and put them into a beaker together. According to the solid:liquid volume ratio=1:20, add deionized water, mechanically stir, titrate with a 30% nitric acid aqueous solution to pH=3, and stir for 6 hours to obtain a composite silica sol. The composite silica sol is sprayed and granulated, and the compressed air temperature is set to 200℃ at the inlet temperature and the dry air volume is 200m 3 / h, the material flow is 1.5L / h, and the dry gel particles are obtained; the dry gel particles are put into a corundum crucible and pre-fired in a common muffle furnace at a temperature of 800°C for 6 hours. After natural ...
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