Zirconate-base red phosphor, method for preparing same and application
A technology of red phosphor and zirconate, applied in the field of fluorescent materials, can solve the problems of short lifespan, unstable performance, low luminous efficiency of white LEDs, etc., and achieve the effects of no waste water and exhaust gas discharge, simple preparation process and environmental friendliness.
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Embodiment 1
[0035] According to the chemical formula Ba 2 Gd 0.8 Eu 0.2 ZrO 5.5 The stoichiometric ratio of each element in the formula is weighed separately from barium carbonate BaCO 3 : 1.9735 g, gadolinium oxide Gd 2 o 3 : 0.725 g, europium oxide Eu 2 o 3 : 0.176 g, Zirconia ZrO 2 : 0.6161 g, after grinding and mixing uniformly in an agate mortar, sintering twice at 1350°C in an air atmosphere for 24 hours, cooling to room temperature, and taking out the sample. The mixture is fully mixed and ground evenly again, sintered in air atmosphere at 1450°C for 24 hours, and cooled to room temperature to obtain powdery red phosphor doped with rare earth ion europium.
[0036] See attached figure 1 , The X-ray powder diffraction pattern of the sample prepared according to the technical scheme of this embodiment is compared with the standard card PDF#47-0389, and the XRD test results show that the prepared material is a single-phase material.
[0037] See attached figure 2 It can b...
Embodiment 2
[0041] According to the chemical formula Ba 2 EZrO 5.5 The stoichiometric ratio of each element in the formula is weighed separately from barium carbonate BaCO 3 : 1.9735 g, europium oxide Eu 2 o 3 : 0.88 g, Zirconia ZrO 2 : 0.6161 g, ground and mixed in an agate mortar, sintered at 1525°C in an air atmosphere, sintered for 6 hours, cooled to room temperature, and the sample was taken out to obtain a powder doped with rare earth ion europium red phosphor. The main structural properties, excitation spectrum, luminescence spectrum and luminescence decay curve are similar to those of Example 1.
[0042] See attached Figure 4 , The X-ray powder diffraction pattern of the sample prepared according to the technical scheme of this embodiment is compared with the standard card PDF#53-1007, and the XRD test results show that the prepared material is a single-phase material.
[0043] See attached Figure 5 , which is the Ba provided by this example 2 EZrO 5.5 The sample samp...
Embodiment 3
[0046] According to the chemical formula Ba 2 Dy 0.8 Eu 0.2 ZrO 5.5 The stoichiometric ratio of each element in the formula is weighed separately from barium carbonate BaCO 3 : 1.9735 g, dysprosium oxide Dy 2 o 3 : 0.746 g, europium oxide Eu 2 o 3 : 0.176 g, Zirconia ZrO 2 : 0.6161 g, after grinding and mixing uniformly in an agate mortar, sintering in an air atmosphere at 1200 ° C for 20 hours, cooling to room temperature, and taking out the sample. Mix and grind the mixture thoroughly again, sinter in an air atmosphere at 1300°C for 15 hours, and cool 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.
[0047] See attached Figure 7 , which is the Ba provided by this example 2 Dy 0.8 Eu 0.2 ZrO 5.5 Comparison of the X-ray powder diffraction pattern of the sample sample with the standard...
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