Multi-wavelength-excited high-performance red fluorescent powder and preparation method thereof
A red phosphor, high-performance technology, applied in the direction of luminescent materials, chemical instruments and methods, etc., can solve the problems of low luminous efficiency and high luminous efficiency, and achieve simple preparation process, low synthesis temperature, good chemical stability and thermal stability sexual effect
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[0027] Example 1
[0028] A method for preparing multi-wavelength excited high-performance red phosphor includes the following steps:
[0029] 1) According to the doping amount of Europium as SiO 2 -Y 2 O 3 -TiO 2 9% of the molar fraction of the oxide matrix, the molar ratio of each oxide in the oxide matrix: SiO 2 :TiO 2 :Y 2 O 3 =1:0.8:0.2, weigh 3.168g of europium trioxide and 4.518g of yttrium trioxide, and dissolve them in a 6mol / L nitric acid solution.
[0030] 2) Add 27.503 g of tetrabutyl titanate and 20.823 g of ethyl orthosilicate to the salt solution obtained in step 1), and stir for 3.5 hours under the heating condition of a water bath at 80°C to form a colloid.
[0031] 3) Put the colloid obtained in step 2) into an oven and bake it at 70°C for 55h.
[0032] 4) Raise the temperature of the muffle furnace to 400°C, then put in the dried colloid, raise the temperature to 800°C, and calcinate for 3.5h to obtain a white powder.
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[0033] Example 2
[0034] The difference from Example 1 is that the amount of europium trioxide is 0.88g, and the amount of europium doped is SiO 2 -Y 2 O 3 -TiO 2 2.5% of the oxide matrix mole fraction, and the rest is the same as in Example 1.
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[0035] Example 3
[0036] The difference from Example 1 is that the amount of Europium trioxide is 1.76g, and the amount of Europium doped is SiO 2 -Y 2 O 3 -TiO 2 5% of the mole fraction of the oxide matrix, and the rest are the same as in Example 1.
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