Near-infrared long-afterglow fluorescent powder and preparation method thereof
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A technology of phosphors and foreign ministers, applied in chemical instruments and methods, luminescent materials, etc., can solve problems such as unsatisfactory afterglow effect
Inactive Publication Date: 2014-07-09
GUANGDONG UNIV OF TECH
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but only doped with Cr 3+ The afterglow
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example 1
[0034] Atomic ratio Zn:Ga:Cr:Nd=1:2:0.01:0.01
[0035] ① Weighing ZnO, Ga 2 o 3 , Cr 2 o 3 ,Nd 2 o 3 The masses of the compounds are respectively: 0.0814g, 1.8744g, 0.0076g, 0.0168g.
[0036] ②Mix these substances in a mortar and grind for an hour to make the mixture evenly mixed.
[0037] ③Then pour the mixture into the crucible, and put it into the furnace to synthesize by high-temperature solid-phase synthesis.
[0038] ④Raise the temperature to 1400°C in 6 hours, keep it warm for 6 hours, cool down to 800°C in 5 hours, and then let the temperature drop to room temperature.
[0039] ⑤Take out the sample and grind it to a powdery fluorescent powder with a small particle size.
[0040] By measuring the emission wavelength and afterglow performance of phosphor powder, we get figure 1 ,2.
[0041]
example 2
[0043] Atomic ratio Zn:Ga:Cr:Nd=1:2:0.01:0.02
[0044] ① Weighing ZnO, Ga 2 o 3 , Cr 2 o 3 ,Nd 2 o 3 The masses of the compounds are respectively: 0.0814g, 1.8744g, 0.0076g, 0.0336g.
[0045] ②Repeat steps ②③④⑤ of Example 1.
[0046] By measuring the emission wavelength and afterglow performance of phosphor powder, we get image 3 ,4.
[0047]
example 3
[0049] Atomic ratio Zn:Ga:Cr:Nd=1:2:0.01:0.03
[0050] ① Weighing ZnO, Ga 2 o 3 , Cr 2 o 3 ,Nd 2 o 3 The masses of the compounds are: 0.0814g, 1.8744g, 0.0076g, 0.0504g, respectively.
[0051] ②Repeat steps ②③④⑤ of Example 1.
[0052] By measuring the emission wavelength and afterglow performance of phosphor powder, we get Figure 5 , 6.
[0053]
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Abstract
The invention discloses near-infrared long-afterglow fluorescent powder and a preparation method thereof. The near-infrared long-afterglow fluorescent powder has a chemical expression formula of ZnGa2O4: aCr<3+>: bNd<3+>, and in the chemical expression formula, a is identically equal to 0.01 and b is alterable in a range of 0.01-0.05. The near-infrared long-afterglow fluorescent powder is obtained by a high-temperature solid-phase synthesis method. The ZnG2O4-based near-infrared long-afterglow fluorescent powder has the characteristics of small hardness, small particle size and high crystallization degree and can be widely used in fields of illumination, printing, luminescence decoration, luminous marking and display.
Description
technical field [0001] The invention relates to a near-infrared long-lasting phosphor and a preparation method thereof, belonging to the field of luminescent materials. Background technique [0002] Long afterglow luminescent materials are referred to as long afterglow materials, also known as light-storing luminescent materials and luminescent materials. A substance that can continue to emit light after the excitation stops, which can store energy in energy traps, is a material with broad application prospects. Solid-doped luminescent materials are widely used in practice, and have been well developed in the fields of lighting, printing, luminescent decoration, and luminous marking. In the actual production at this stage, on the one hand, the chemical stability and luminescence of the blue and green long-lasting luminescent materials basically meet the practical needs. On the other hand, compared with the long-lasting luminescence in the visible light range, the research ...
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