Method for preparing amorphous aluminum-based nano fluorescent powder by sol-gel method and application of amorphous aluminum-based nano fluorescent powder
A nano-phosphor, sol-gel technology, applied in the field of rare earth amorphous aluminum-based nanomaterials, can solve the problems of lack of red light emission, low display index, unfavorable development, etc., and achieves a reasonable and simple preparation method and eliminates crystal lattices. Thermal energy, good amorphous effect
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Embodiment 1
[0047] Prepare ethanol and water into the solution according to the molar ratio of 1:6, then add aluminum nitrate according to the molar ratio of water and aluminum source of 1:10, after it is fully dissolved, add according to the molar ratio of europium source and aluminum source of 1:2 The europium nitrate is fully stirred to dissolve it, and finally polyvinylpyrrolidone with a mass fraction of 2% is added, and magnetically stirred to make it uniformly dispersed to obtain a sol-gel precursor. Slowly evaporate the solution to dryness at 550°C to obtain a black powder and press it into a block, then transfer it to a muffle furnace and raise it to 550°C at a rate of 3°C / min for 1 hour to obtain amorphous aluminum base phosphor.
[0048] see figure 1 , the obtained amorphous aluminum-based nano-phosphor powder is scanned between 10 and 80 degrees by an X-ray diffractometer, and the sample shows amorphous diffraction characteristics.
Embodiment 2
[0050] Prepare ethanol and water into the solution according to the molar ratio of 1:1, then add aluminum sulfate according to the molar ratio of water and aluminum source of 1:50, after it is fully dissolved, add according to the molar ratio of europium source and aluminum source of 1:10 The europium nitrate was fully stirred to dissolve it, and finally polyvinylpyrrolidone with a mass fraction of 3% was added, and magnetically stirred to make it uniformly dispersed to obtain a sol-gel precursor. Slowly evaporate the solution to dryness at 550°C to obtain a black powder and press it into a block, then transfer it to a muffle furnace and raise it to 600°C at a rate of 4°C / min for 2 hours to obtain amorphous aluminum base phosphor.
[0051] see figure 2 , shows the emission spectrum of the obtained amorphous aluminum-based nano-phosphor powder at 365nm. Depend on figure 2 It can be seen that four peaks appear at 592nm, 614nm, 653nm and 703nm respectively, among which the i...
Embodiment 3
[0053] Prepare ethanol and water into the solution according to the molar ratio of 1:9, then add aluminum nitrate according to the molar ratio of water and aluminum source of 1:100, after it is fully dissolved, add according to the molar ratio of europium source and aluminum source of 1:20 The europium acetate is fully stirred to dissolve it, and finally polyvinylpyrrolidone with a mass fraction of 5% is added, and magnetically stirred to make it uniformly dispersed to obtain a sol-gel precursor. Slowly evaporate the solution to dryness at 550°C to obtain a black powder and press it into a block, then transfer it to a muffle furnace and raise it to 700°C at a rate of 5°C / min for 2 hours to obtain amorphous aluminum base phosphor.
[0054] see image 3 , the obtained amorphous aluminum-based nano-phosphor powder is scanned between 10 and 80 degrees by an X-ray diffractometer, and the sample shows amorphous diffraction characteristics.
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