Orange-red rear-earth phosphors and preparation method thereof
A rare earth phosphor, orange-red technology, applied in the field of orange-red rare earth phosphor and its preparation, can solve the problems of low luminous efficiency of red light, low absorption efficiency, no research on the thermal quenching temperature of the phosphor, etc., and achieve high luminous efficiency , good thermal stability
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Embodiment 1
[0018] Weigh strontium carbonate (SrCO 3 ): 2.89 g (51.70%), calcium chloride (CaCl 2 ): 1.11 g (19.86%), aluminum hydroxide [Al(OH) 3 ]: 1.56 g (27.90 %), europium trioxide (Eu 2 o 3 ): 0.03 g (0.54 %), fully ground in an agate mortar and mixed evenly, pre-fired at 500°C for 4 hours, cooled to room temperature, taken out and ground again, reduced and sintered in a CO atmosphere at 1200°C for 4 hours, Grinding the obtained sintered product to 350-400 nm to obtain the final product.
[0019] The luminescent properties of this phosphor are as follows figure 1 As shown, it has a strong excitation broadband excitation in the near ultraviolet region, and the emission spectrum under the excitation of 400 nm light is shown as figure 1 As shown, the emission of the sample is dominated by the orange-red emission around 600 nm.
[0020] The emission spectra of this phosphor at different temperatures are as follows: figure 2 shown. As the temperature increases, the luminous in...
Embodiment 2
[0023] Weigh strontium carbonate: 2.89 g (41.40%), strontium chloride hexahydrate: 2.67 g (38.25%), aluminum hydroxide: 0.78 g (11.17%), boric acid 0.61 g (8.74%), europium trioxide: 0.03 g (0.44%), ground in an agate mortar and mixed evenly, pre-fired at 400°C for 6 hours, cooled to room temperature, taken out and ground again, reduced and sintered in a CO atmosphere at 1100°C for 7 hours, and the obtained sintered Grind to get the final product.
Embodiment 3
[0025] Weigh strontium carbonate: 2.91 g (45.75%), strontium fluoride: 0.63 g (9.90%), strontium bromide: 1.24 g (19.50%), aluminum hydroxide: 1.56 g (24.53%), europium trioxide: 0.02 g (0.32%), fully ground in an agate mortar and mixed evenly, pre-fired at 500 °C for 3 hours, cooled to room temperature, taken out and ground again, reduced and sintered in a CO atmosphere at 1000 °C for 8 hours, the obtained The sinter is ground to obtain the final product.
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