Long-afterglow yellow fluorophor and preparation method thereof
A technology of yellow phosphor and long afterglow, applied in the field of materials, can solve the problems of difficult control of finished product quality and complicated preparation process, and achieve the effects of good afterglow luminescence performance, simple preparation method and wide excitation range
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Embodiment 1
[0010] Example 1 2 (Ca 0.995 Eu 0.005 )O·0.8CaBr 2 0.7SiO2 2 :0.01 Synthesis of Ti material
[0011] Accurately weigh CaCO 3 1.992 g, CaBr 2 2H 2 O1.887g, SiO 2 0.421 g, Eu 2 o 3 0.018 g, TiO 2 0.008 g, H 3 BO 3 0.043 grams. Grind and mix the above raw materials evenly, put them into a corundum crucible, compact them, cover them, and sinter them in two steps. First, pre-sinter at a lower temperature of 500°C for 4 hours, cool to room temperature, take it out and grind it again, and then sinter at 900°C for 6 hours in a carbon-reducing atmosphere to obtain the target phosphor. The material can absorb ultraviolet and visible light well, and has a long-lasting yellow long afterglow luminous effect.
Embodiment 2
[0012] Example 2 2(Ca 0.98 Eu 0.02 )O·0.9CaBr 2 ·SiO2 2 : Synthesis of 0.04Zr material
[0013] Accurately weigh CaCO 3 1.962 g, CaBr 2 2H 2 O2.123g, SiO 2 0.601 g, Eu 2 o 3 0.072 g, ZrO 2 0.049 g, H 3 BO 3 0.086 grams. Grind and mix the above raw materials evenly, put them into a corundum crucible, compact them, cover them, and sinter them in two steps. First, pre-sinter at a lower temperature of 400°C for 5 hours, cool to room temperature, take it out and grind it again, and then sinter at 1100°C for 6 hours in a carbon-reducing atmosphere to obtain the target phosphor. The material can absorb ultraviolet and visible light well, and has a long-lasting yellow long afterglow luminous effect.
Embodiment 3
[0014] Example 3 2(Ca 0.95 Eu 0.05 )O·CaBr 2 ·SiO2 2 : Synthesis of 0.1La material
[0015] Accurately weigh CaCO 3 1.902 g, CaBr 2 2H 2 O2.359 g, SiO 2 0.601 g, Eu 2 o 3 0.176 g, La 2 o 3 0.163 grams. Grind and mix the above raw materials evenly, put them into a corundum crucible, compact them, cover them, and sinter them in two steps. First, pre-sinter at a lower temperature of 500°C for 3 hours, cool to room temperature, take it out and grind it again, and then sinter at 1000°C for 5 hours in a carbon-reducing atmosphere to obtain the target phosphor. The material can absorb ultraviolet and visible light well, and has a long-lasting yellow long afterglow luminous effect.
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