Europium ion Eu<3+> activated red phosphor, preparation method and application
A technology of red phosphor and europium ions, which is applied in the field of fluorescent materials, can solve the problems of low luminous efficiency of red phosphor, low luminous efficiency of white LED, and unstable performance, and achieve good luminous intensity, environmental friendliness, and easy production. Effect
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Embodiment 1
[0024] According to the chemical formula CaMg 3 Y 7.2 Eu 0.8 o 16 The stoichiometric ratio of each element in, respectively weighed calcium carbonate CaCO 3 : 0.2500 g, magnesium basic carbonate C 4 Mg 4 o 2 -H 2 MgO 2 -5H 2 O: 0.7284 g, yttrium oxide Y 2 o 3 : 2.0322 g, europium oxide Eu 2 o 3 : 0.3520 g, ground in an agate mortar and mixed evenly, then sintered twice at 600°C in an air atmosphere, the sintering time is 18 hours, cooled to room temperature, and the sample was taken out. Mix and grind the mixture thoroughly again, sinter in an air atmosphere at 1100°C for 18 hours, and cool to room temperature to obtain a powdery red phosphor doped with rare earth ion europium.
[0025] See attached figure 1 , which is compared with the standard card PDF#84-1054 of the X-ray powder diffraction pattern of the sample prepared according to the technical scheme of this embodiment, and the XRD test results show that the prepared material is a single-phase material.
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Embodiment 2
[0030] According to the chemical formula CaMg 3 Y 6.8 Eu 1.2 o 16 The stoichiometric ratio of each element in, respectively weighed calcium carbonate CaCO 3 : 0.2500 g, magnesium oxide MgO: 0.3023 g, yttrium oxide Y 2 o 3 : 1.9193 grams, europium nitrate Eu (NO 3 ) 3: 1.0141 g, after grinding and mixing uniformly in an agate mortar, sintering twice at 950°C in an air atmosphere for 10 hours, cooling to room temperature, and taking out the sample. The mixture is fully mixed and ground evenly again, and sintered in an air atmosphere at 1450°C for 10 hours, and cooled to room temperature to obtain a powdery red phosphor doped with rare earth ion europium. The main structural properties, excitation spectrum, luminescence spectrum and luminescence decay curve are similar to those of Example 1.
Embodiment 3
[0032] According to the chemical formula CaMg 3 Y 6.4 Eu 1.6 o 16 The stoichiometric ratio of each element in, respectively weighed calcium carbonate CaCO 3 : 0.2500 g, magnesium basic carbonate C 4 Mg 4 o 2 -H 2 MgO 2 -5H 2 O: 0.7284 g, yttrium nitrate Y (NO 3 ) 3 : 3.6128 grams, europium nitrate Eu (NO 3 ) 3 : 1.3522 g, ground and mixed in an agate mortar, then sintered twice at 1075°C in an air atmosphere, the sintering time is 14 hours, cooled to room temperature, and the sample was taken out. Mix and grind the mixture thoroughly again, sinter in air atmosphere at 1375°C for 16 hours, and cool to room temperature to obtain powdery red phosphor doped with rare earth ion europium. The main structural properties, excitation spectrum, luminescence spectrum and luminescence decay curve are similar to those of Example 1.
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