Preparation method of Mn<4+> doped fluoride luminous crystal capable of being excited by blue light
A technology for blue light excitation and luminescent crystals, applied in chemical instruments and methods, luminescent materials, etc., can solve the problem that the luminescent properties and applications of crystal materials are not involved, and achieve the effect of high luminous efficiency and high transparency
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Embodiment 1
[0020] Weigh 11.05 g of tantalum pentoxide and add it to 25 ml (40%) hydrofluoric acid (HF) and stir vigorously for 90 minutes, then add 0.22 g of potassium hexafluoromanganate to the solution and continue the reaction for 30 minutes. Then 5.81 g of potassium fluoride were added and stirring was continued for 60 minutes. Finally, the resulting transparent solution was slowly volatilized at room temperature for 14 days, and the orange-red long strip crystals were washed with ethanol for 5 times and dried in a vacuum oven for 24 hours, that is, the required K 2 TaF 7 :Mn 4+ glowing crystals.
[0021] attached figure 1 Shown is the structural diagram of this luminescent crystal, which is monoclinic, and the space group is P21 / c .
[0022] attached figure 2 shown as K 2 TaF 7 :Mn 4+ Photo of luminescent crystals under natural light, the sample shows regular strip shape and has good light transmission performance.
[0023] image 3 For this purpose, the excitation spec...
Embodiment 2
[0027] Weigh 6.65 g of niobium pentoxide and add it to 25 ml (40%) hydrofluoric acid (HF) and stir vigorously for 60 minutes, then add 0.22 g of potassium hexafluoromanganate to the solution and continue the reaction for 30 minutes. Then 5.81 g of potassium fluoride were added and stirring was continued for 60 minutes. Finally, the resulting transparent solution was slowly volatilized at room temperature for 10 days, and the orange-red long strip crystals were washed with ethanol for 5 times and dried in a vacuum oven for 24 hours, that is, the required K 2 NbF 7 :Mn 4+ glowing crystals.
[0028] attached Figure 6 The structure diagram of this luminescent crystal is shown, which also belongs to the monoclinic crystal system, and the space group is P21 / c .
[0029] attached Figure 7shown as K 2 NbF 7 :Mn 4+ Photo of luminescent crystals under natural light, the sample shows regular strip shape and has good light transmission performance.
[0030] Figure 8 For thi...
Embodiment 3
[0032] Weigh 11.05 g of tantalum pentoxide and add it to 25 ml (40%) hydrofluoric acid (HF) and stir vigorously for 90 minutes, then add 0.27 g of potassium hexafluoromanganate to the solution and continue the reaction for 60 minutes. Then 5.81 g of potassium fluoride were added and stirring was continued for 60 minutes. Finally, the resulting transparent solution was slowly volatilized at room temperature for 14 days, and the orange-red long strip crystals were washed with ethanol for 5 times and dried in a vacuum oven for 24 hours, that is, the required K 2 TaF 7 :Mn 4+ glowing crystals.
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