Silicate-based phosphor material and preparation method thereof
A phosphor and silicate technology, applied in the directions of luminescent materials, chemical instruments and methods, electrical components, etc., to achieve the effects of wide excitation range, low cost, and simple operation
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Embodiment 1
[0039] A phosphor material for near-infrared fluorescent conversion LED, the chemical expression of the phosphor is NaSc 0.96 Si 2 o 6 : 0.04Cr, its preparation steps are as follows:
[0040] 1. Weigh the raw material Na 2 CO 3 0.007mol, Sc 2 o 3 0.0048mol, SiO2 0.014mol, Cr 2 o 3 0.0002mol;
[0041] 2. The weighed raw materials and 1.5% NH 4 After F is fully mixed as a flux, it is sintered in air at 1200 ° C for 10 hours to obtain a roasted product;
[0042] 3. Fully grind the roasted product into powder and pass through a 200-mesh sieve, wash with deionized water for 3 times, and dry at 80°C to obtain the NaSc of the present invention. 0.96 Si 2 o 6 : 0.04Cr near-infrared phosphor.
[0043] The excitation spectrum and emission spectrum of this example are as figure 1 shown.
Embodiment 2
[0045] A phosphor material for near-infrared fluorescent conversion LED, the chemical expression of the phosphor is LiSc 0.96 Si 2 o 6 : 0.04Cr, its preparation steps are as follows:
[0046] 1. Weigh the raw material Li 2 CO 3 0.005mol, Sc 2 o 3 0.0048mol, SiO 2 0.012mol, Cr 2 o 3 0.0002mol;
[0047] 2. The weighed raw materials and 1.5% NH 4 After F is fully mixed as a flux, it is sintered at 1200 ° C in air for 5 hours to obtain a roasted product;
[0048] 3. Grind the roasted product into powder and pass it through a 200-mesh sieve, wash it three times with deionized water, and dry it at 100°C to obtain the near-infrared phosphor LiSc of the present invention. 0.96 Si 2 o 6 : 0.04Cr.
[0049] The excitation spectrum and emission spectrum of this example are as figure 2 , 3 shown.
Embodiment 3
[0051] A phosphor material for near-infrared fluorescent conversion type LED, the chemical expression of the phosphor is Na 0.8 Li 0.2 sc 0.98 Si 2 o 6 : 0.02Cr, its preparation steps are as follows:
[0052] 1. Weigh the raw material Na 2 CO 3 0.004mol, Li 2 CO 3 0.001mol, Sc 2 o 3 0.0049mol, SiO 2 0.01mol, Cr 2 o 3 0.0001mol;
[0053] 2. The weighed raw materials and 2% H of the total weight of the raw materials 3 BO 3 After being fully mixed as a flux, it was sintered at 1250°C in air for 6 hours to obtain a calcined product;
[0054] 3. Fully grind the calcined product into powder and pass through a 200-mesh sieve, wash with deionized water for 3 times, and dry at 120°C to obtain the near-infrared fluorescent powder Na 0.8 Li 0.2 sc 0.98 Si 2 o 6 : 0.02Cr.
[0055] The excitation spectrum and emission spectrum of this example are as Figure 4 , 5 shown.
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