Mn<4+> activated polyfluoride red luminous material and preparation method
A polyfluoride, red light-emitting technology, applied in the direction of luminescent materials, chemical instruments and methods, etc., can solve the problem that there are not many reports on polyfluoride phosphors
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Embodiment 1
[0016] Weigh barium carbonate: 1.97 g, zirconium dioxide: 0.615 g, potassium hexafluoromanganate: 0.124 g, then add 10 mL (40 %) hydrofluoric acid (HF) to the above solid mixture and stir to dissolve, then add 40 mL distilled water. Subsequently, the resulting solution was reacted in an autoclave at 180°C for 12 hours, cooled to room temperature, washed with distilled water, and then dried in a vacuum oven for 24 hours. Finally, the white powder obtained was the final Ba 2 ZrF 8 :Mn 4+ .
[0017] The XRD diffraction pattern of this fluorescent powder is attached figure 1 As shown, the diffraction peak of the sample is consistent with the standard card JCPDS 89-0861 (Ba 2 ZrF 8 ) are completely consistent, and no diffraction peaks of any heterogeneous phases are observed, which indicates that our synthesized samples have a single crystal phase.
[0018] attached figure 2 Shown are the room temperature excitation spectrum (monitored at 628 nm) and emission spectrum (exci...
Embodiment 2
[0020] Weigh barium carbonate: 1.97 g, hafnium dioxide: 1.052 g, potassium hexafluoromanganate: 0.062 g, then add 15 mL (40 %) hydrofluoric acid (HF) to the above solid mixture and stir to dissolve, then add 35 mL distilled water. Subsequently, the resulting solution was reacted in an autoclave at 180°C for 10 hours, cooled to room temperature, washed with distilled water, and then dried in a vacuum oven for 24 hours, and finally the white powder obtained was the final Ba 2 Hf 8 :Mn 4+ Luminescent material.
[0021] attached image 3 Shown is the XRD diffraction pattern of this phosphor, which is consistent with the standard card JCPDS 89-0861 (Ba 2 ZrF 8 ) are basically consistent, which indicates that the structure of our synthesized sample is similar to that of Ba 2 ZrF 8 :Mn 4+ unanimous.
[0022] attached Figure 4 Shown are the room temperature excitation spectrum (monitored at 627 nm) and emission spectrum (excited at 465 nm) of the sample. The sample has str...
Embodiment 3
[0024] Weigh barium fluoride: 0.875 g, zirconium dioxide: 0.584 g, potassium hexafluoromanganate: 0.186 g, then add 5 mL (40 %) hydrofluoric acid (HF) to the above solid mixture and stir to dissolve, then add 45 mL of distilled water. Subsequently, the resulting solution was reacted in an autoclave at 160°C for 10 hours, cooled to room temperature, washed with distilled water, and then dried in a vacuum oven for 24 hours. Finally, the white powder obtained was the final Ba 2 ZrF 8 :Mn 4+ .
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