Blue-fluorescence luminescent material and method for making same
A luminescent material, blue fluorescent technology, applied in the field of fluorescent materials, can solve the problems of pollution and high cost, achieve the effect of cost reduction and large-scale application
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Embodiment 1
[0034] Weigh sodium carbonate Na 2 CO 3 :1.59g, strontium carbonate SrCO 3 :5.94g, barium carbonate BaCO 3 :7.89g, ammonia dihydrogen phosphate NH 4 H 2 (PO 4 ): 3.195g, after grinding and mixing uniformly, select air atmosphere for the first calcination, the temperature is 450℃, the calcination time is 1.5 hours, then cool to room temperature, and take out the sample.
[0035] Adding Europium Oxide (Eu) to the raw materials for the first calcination 2 O 3 :0.0528g, again mix and grind the mixture well, and sinter it for the second time at 700℃ in a reducing atmosphere such as hydrogen or nitrogen-hydrogen mixture. The sintering time is 5 hours, and it is cooled to room temperature to obtain a powder. A blue fluorescent luminescent material doped with rare earth ion europium strontium barium sodium phosphate.
[0036] The sample obtained in this embodiment is excited under vacuum ultraviolet light to obtain blue fluorescence.
[0037] Refer to Figure 1, which is a comparison betwe...
Embodiment 2
[0042] Weighing out sodium carbonate Na 2 CO 3 :1.590 grams, strontium carbonate SrCO 3 :3.100g, barium carbonate BaCO 3 :1.776 g, ammonia dihydrogen phosphate NH 4 H 2 (PO 4 ): 3.195g, after grinding and mixing uniformly, select the first calcination in air atmosphere, the temperature is 500℃, the pre-sintering time is 2 hours, and it is cooled to room temperature. Take out the sample and add Europium Oxide Eu at this time 2 O 3 :0.108g, again fully ground and mixed uniformly, the second calcination, in the reducing atmosphere of carbon monoxide gas, sintering at 720 ℃ for 6 hours, then the divalent rare earth Eu 2+ The activated blue luminescent powder, the main structural properties, excitation spectrum and luminescence spectrum are similar to those in Example 1.
Embodiment 3
[0044] According to the ratio of the elements in the expression, weigh the sodium carbonate Na 2 CO 3 :1.0812g, barium carbonate BaCO 3 :3.947g, ammonia dihydrogen phosphate NH 4 H 2 (PO 4 ): 2.3466 g, after grinding and mixing uniformly, calcination in air atmosphere, first pre-sintering at 480°C for 1 hour, cool to room temperature, take out the sample, add europium oxide at this time 2 O 3 :0.018g, fully grind again and mix evenly, in a reducing atmosphere such as nitrogen (add activated carbon), carbon monoxide gas, hydrogen or nitrogen-hydrogen mixture, sinter for the second time at 750℃, and the sintering time is 5 hours, you can get Rare Earth Eu 2+ Activated blue glowing luminescent powder. The main structural properties, excitation spectrum and luminescence spectrum are similar to those in Example 1.
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