Silicate phosphor excited by ultraviolet light and blue light and preparation method and application thereof
A technology of blue light excitation and ultraviolet light, applied in the field of fluorescent materials, can solve the problem of narrow emission wavelength of phosphors, and achieve the effect of wide excitation wavelength range, easy mass production, and good luminous effect.
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[0031] The preparation method of the above-mentioned silicate phosphor excited by ultraviolet light and blue light comprises the following steps:
[0032] (1) Take by weighing the K-containing compound, the Ba-containing compound and the Si-containing compound according to the stoichiometric ratio, and grind and mix uniformly to obtain the mixture;
[0033] The K-containing compound is one or more of K-containing nitrates, K-containing hydroxides, and K-containing carbonates;
[0034] The Ba-containing compound is one or more of Ba-containing oxides, Ba-containing carbonates, Ba-containing nitrates, and Ba-containing hydroxides;
[0035] The Si-containing compound is one or both of Si-containing oxides and Si-containing oxyacids;
[0036] (2) Calcining the mixture obtained in step (1) at 1000-1300° C. for 1-10 hours in a reducing atmosphere to obtain a solid, which is a silicate phosphor excited by ultraviolet light and blue light;
Embodiment 1
[0046] combine figure 1 Illustrative Example 1
[0047] K 1.5 Li 0.5 Ba 6.86 Si 16 o 40 :0.14Eu 2+ Preparation of:
[0048] Weigh KNO 3 0.0833g, Li 2 CO 3 0.0092, BaCO 3 0.6769g, SiO 2 0.4806g, Eu 2 o 3 0.0123g, fully grind and mix, put into corundum crucible, put into high temperature furnace under 20%H 2 Calcined at 1000° C. for 2 hours in a mixed atmosphere with 80% N2, cooled naturally, taken out, and ground and dispersed to obtain silicate phosphor excited by ultraviolet light and blue light.
[0049] figure 1 for K 1.5 Li 0.5 Ba 6.86 Si 16 o 40 :0.14Eu 2+ The XRD (X-ray diffraction figure) spectrogram; As can be seen from the figure, phosphor powder of the present invention and K 1.5 Li 0.5 Ba 7 Si 16 o 40 The positions of the absorption peaks of the standard cards are basically the same, and there are no miscellaneous peaks, indicating that the present invention has indeed prepared the structural formula K 2(1-x) Ba 7(1-y) Si 16 o 40 :7zEu ...
Embodiment 2
[0051] K 1.5 Na 0.5 Ba 6.86 Si 16 o 40 :0.14Eu 2+ Preparation of:
[0052] Weigh KNO 3 0.0833g, NaNO 3 0.0195, Ba(NO 3 ) 2 0.8965g, SiO 2 0.4806g, Eu 2 o 3 0.0123g, fully grind and mix, put into corundum crucible, put into high temperature furnace under 10%H 2 and 90%N 2 Baking at 1050°C for 4 hours in a mixed atmosphere, taking it out after natural cooling, grinding and dispersing, and obtaining silicate phosphor excited by ultraviolet light and blue light.
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