a kind of EU 3+ Ion-activated aluminophosphate fluorescent ceramics and its preparation method and application
A fluorescent ceramic and aluminophosphate technology, which is applied in chemical instruments and methods, luminescent materials, semiconductor devices, etc., can solve the problems of long preparation method, impure chromaticity, low luminous efficiency, etc., and achieves low equipment requirements and luminous The effect of high efficiency and simple synthesis process
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Embodiment 1
[0024] According to Li 9 Al 2.7 Eu 0.3 P 8 o 29 The stoichiometric ratio of Li, Al, Eu, P in Li, Al, Eu, P, respectively weigh lithium carbonate Li 2 CO 3 : 3.321 g, aluminum oxide Al 2 o 3 : 1.377 g, europium oxide Eu 2 o 3 : 0.528 g and monoammonium phosphate NH 4 h 2 PO 4 : 9.2 g. Add acetone to the weighed raw materials for wet grinding, so as to mix evenly, and the obtained mixture is calcined for the first time under the air atmosphere, the calcining temperature is 750 ° C, and the calcining time is 1 hour; the calcined samples are ground evenly, and the calcined samples are Calcination for the second time, the calcination temperature is 850°C, and the calcination time is 4 hours to obtain a Eu 3+ Ion-activated red fluorescent ceramics.
[0025] See attached figure 1 , is the X-ray ceramic powder diffraction pattern of the sample prepared by the technical scheme of Example 1. The XRD test results show that the prepared sample has a good crystallinity and i...
Embodiment 2
[0031] According to Li 9 Al 2.55 Eu 0.45 P 8 o 29 The stoichiometric ratios of Li, Al, Eu, and P in Li, Al, Eu, and P are respectively weighed lithium hydroxide LiOH: 2.155 grams, aluminum hydroxide Al(OH) 3 : 1.989 g, europium oxide Eu 2 o 3: 0.792 g, phosphoric acid H 3 PO 4 : 7.838 grams. Mix the weighed raw materials and add acetone for wet grinding, so as to mix evenly, and the obtained mixture is calcined for the first time under the air atmosphere, the calcining temperature is 300 ° C, and the calcining time is 7.5 hours; The second calcination, the calcination temperature is 1150 ° C, the calcination time is 2 hours, to obtain Eu 3+ Ion-activated red fluorescent ceramics.
[0032] The structure, morphology, excitation spectrum and emission spectrum of the fluorescent ceramic sample prepared in this example are similar to those in Example 1.
Embodiment 3
[0034] According to Li 9 Al 2.997 Eu 0.003 P 8 o 29 The stoichiometric ratio of Li, Al, Eu, P in Li, Al, Eu, P, respectively weigh lithium sulfate Li 2 SO 4 : 5.758 grams, aluminum nitrate Al (NO 3 ) 3 ·6H 2 O: 9.620 grams, europium nitrate Eu (NO 3 ) 3 ·6H 2 O: 1.338 g, phosphoric acid H 3 PO 4 : 7.838 grams. After mixing the weighed raw materials, add acetone for wet grinding, so as to mix uniformly, and the obtained mixture is calcined for the first time under air atmosphere, the calcining temperature is 450 ° C, and the calcining time is 3.5 hours; the calcined samples are ground uniformly, and the The second calcination under air atmosphere, the calcination temperature is 750°C, and the calcination time is 8 hours, to obtain a Eu 3+ Ion-activated red fluorescent ceramics.
[0035] The structure, morphology, excitation spectrum and emission spectrum of the fluorescent ceramic sample prepared in this example are similar to those in Example 1.
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