CN115571911B - Praseodymium ion activated near infrared emission material and preparation method thereof - Google Patents
Praseodymium ion activated near infrared emission material and preparation method thereof Download PDFInfo
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- CN115571911B CN115571911B CN202211192125.XA CN202211192125A CN115571911B CN 115571911 B CN115571911 B CN 115571911B CN 202211192125 A CN202211192125 A CN 202211192125A CN 115571911 B CN115571911 B CN 115571911B
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- 239000000463 material Substances 0.000 title claims abstract description 35
- WCWKKSOQLQEJTE-UHFFFAOYSA-N praseodymium(3+) Chemical compound [Pr+3] WCWKKSOQLQEJTE-UHFFFAOYSA-N 0.000 title claims abstract description 25
- 238000002360 preparation method Methods 0.000 title abstract description 7
- 229910001451 bismuth ion Inorganic materials 0.000 claims abstract description 9
- 239000002994 raw material Substances 0.000 claims abstract description 9
- 239000000126 substance Substances 0.000 claims abstract description 8
- 239000000203 mixture Substances 0.000 claims description 36
- 238000001354 calcination Methods 0.000 claims description 25
- 150000001875 compounds Chemical class 0.000 claims description 25
- 239000011734 sodium Substances 0.000 claims description 16
- 238000000034 method Methods 0.000 claims description 13
- 238000005245 sintering Methods 0.000 claims description 13
- 238000001816 cooling Methods 0.000 claims description 12
- -1 praseodymium ions Chemical class 0.000 claims description 11
- CDBYLPFSWZWCQE-UHFFFAOYSA-L Sodium Carbonate Chemical compound [Na+].[Na+].[O-]C([O-])=O CDBYLPFSWZWCQE-UHFFFAOYSA-L 0.000 claims description 10
- BWHMMNNQKKPAPP-UHFFFAOYSA-L potassium carbonate Chemical compound [K+].[K+].[O-]C([O-])=O BWHMMNNQKKPAPP-UHFFFAOYSA-L 0.000 claims description 10
- LFVGISIMTYGQHF-UHFFFAOYSA-N ammonium dihydrogen phosphate Chemical compound [NH4+].OP(O)([O-])=O LFVGISIMTYGQHF-UHFFFAOYSA-N 0.000 claims description 9
- 238000000227 grinding Methods 0.000 claims description 9
- 238000003746 solid phase reaction Methods 0.000 claims description 6
- 229910052777 Praseodymium Inorganic materials 0.000 claims description 5
- 229910000387 ammonium dihydrogen phosphate Inorganic materials 0.000 claims description 5
- 229910000416 bismuth oxide Inorganic materials 0.000 claims description 5
- TYIXMATWDRGMPF-UHFFFAOYSA-N dibismuth;oxygen(2-) Chemical compound [O-2].[O-2].[O-2].[Bi+3].[Bi+3] TYIXMATWDRGMPF-UHFFFAOYSA-N 0.000 claims description 5
- 235000019837 monoammonium phosphate Nutrition 0.000 claims description 5
- 239000006012 monoammonium phosphate Substances 0.000 claims description 5
- MMKQUGHLEMYQSG-UHFFFAOYSA-N oxygen(2-);praseodymium(3+) Chemical compound [O-2].[O-2].[O-2].[Pr+3].[Pr+3] MMKQUGHLEMYQSG-UHFFFAOYSA-N 0.000 claims description 5
- 229910000027 potassium carbonate Inorganic materials 0.000 claims description 5
- 229910003447 praseodymium oxide Inorganic materials 0.000 claims description 5
- 229910000029 sodium carbonate Inorganic materials 0.000 claims description 5
- 229910015902 Bi 2 O 3 Inorganic materials 0.000 claims description 4
- NPYPAHLBTDXSSS-UHFFFAOYSA-N Potassium ion Chemical compound [K+] NPYPAHLBTDXSSS-UHFFFAOYSA-N 0.000 claims description 4
- 238000002156 mixing Methods 0.000 claims description 4
- 239000011574 phosphorus Substances 0.000 claims description 4
- 229910052698 phosphorus Inorganic materials 0.000 claims description 4
- 229910001414 potassium ion Inorganic materials 0.000 claims description 3
- 229910001415 sodium ion Inorganic materials 0.000 claims description 3
- 230000015572 biosynthetic process Effects 0.000 claims description 2
- 238000003786 synthesis reaction Methods 0.000 claims description 2
- FKNQFGJONOIPTF-UHFFFAOYSA-N Sodium cation Chemical compound [Na+] FKNQFGJONOIPTF-UHFFFAOYSA-N 0.000 claims 1
- 230000005284 excitation Effects 0.000 abstract description 5
- 150000002500 ions Chemical class 0.000 abstract description 3
- 239000011159 matrix material Substances 0.000 abstract description 3
- 229910019142 PO4 Inorganic materials 0.000 abstract description 2
- NBIIXXVUZAFLBC-UHFFFAOYSA-K phosphate Chemical compound [O-]P([O-])([O-])=O NBIIXXVUZAFLBC-UHFFFAOYSA-K 0.000 abstract description 2
- 239000010452 phosphate Substances 0.000 abstract description 2
- 230000005855 radiation Effects 0.000 abstract description 2
- 230000007704 transition Effects 0.000 abstract description 2
- 239000012190 activator Substances 0.000 abstract 1
- 238000003912 environmental pollution Methods 0.000 abstract 1
- 239000000843 powder Substances 0.000 abstract 1
- 238000000295 emission spectrum Methods 0.000 description 7
- 238000000695 excitation spectrum Methods 0.000 description 6
- 238000000634 powder X-ray diffraction Methods 0.000 description 6
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 3
- 230000031700 light absorption Effects 0.000 description 3
- 238000001748 luminescence spectrum Methods 0.000 description 3
- 239000004570 mortar (masonry) Substances 0.000 description 3
- 239000012071 phase Substances 0.000 description 3
- 229910052747 lanthanoid Inorganic materials 0.000 description 2
- 230000035515 penetration Effects 0.000 description 2
- 229910052761 rare earth metal Inorganic materials 0.000 description 2
- DGAQECJNVWCQMB-PUAWFVPOSA-M Ilexoside XXIX Chemical compound C[C@@H]1CC[C@@]2(CC[C@@]3(C(=CC[C@H]4[C@]3(CC[C@@H]5[C@@]4(CC[C@@H](C5(C)C)OS(=O)(=O)[O-])C)C)[C@@H]2[C@]1(C)O)C)C(=O)O[C@H]6[C@@H]([C@H]([C@@H]([C@H](O6)CO)O)O)O.[Na+] DGAQECJNVWCQMB-PUAWFVPOSA-M 0.000 description 1
- 238000004497 NIR spectroscopy Methods 0.000 description 1
- 206010070834 Sensitisation Diseases 0.000 description 1
- 238000010521 absorption reaction Methods 0.000 description 1
- 230000003213 activating effect Effects 0.000 description 1
- 230000003321 amplification Effects 0.000 description 1
- 238000004458 analytical method Methods 0.000 description 1
- 238000000149 argon plasma sintering Methods 0.000 description 1
- 238000012984 biological imaging Methods 0.000 description 1
- 239000003054 catalyst Substances 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 239000011651 chromium Substances 0.000 description 1
- 229910001430 chromium ion Inorganic materials 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 239000013078 crystal Substances 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 238000005286 illumination Methods 0.000 description 1
- 238000004020 luminiscence type Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 230000004297 night vision Effects 0.000 description 1
- 231100000956 nontoxicity Toxicity 0.000 description 1
- 238000003199 nucleic acid amplification method Methods 0.000 description 1
- 230000003287 optical effect Effects 0.000 description 1
- 239000013307 optical fiber Substances 0.000 description 1
- 230000010287 polarization Effects 0.000 description 1
- 230000008313 sensitization Effects 0.000 description 1
- 239000000779 smoke Substances 0.000 description 1
- 229910052708 sodium Inorganic materials 0.000 description 1
- 230000003595 spectral effect Effects 0.000 description 1
- 238000004611 spectroscopical analysis Methods 0.000 description 1
- 238000005303 weighing Methods 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01G—COMPOUNDS CONTAINING METALS NOT COVERED BY SUBCLASSES C01D OR C01F
- C01G29/00—Compounds of bismuth
- C01G29/006—Compounds containing, besides bismuth, two or more other elements, with the exception of oxygen or hydrogen
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
- C09K11/00—Luminescent, e.g. electroluminescent, chemiluminescent materials
- C09K11/08—Luminescent, e.g. electroluminescent, chemiluminescent materials containing inorganic luminescent materials
- C09K11/77—Luminescent, e.g. electroluminescent, chemiluminescent materials containing inorganic luminescent materials containing rare earth metals
- C09K11/7709—Phosphates
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01P—INDEXING SCHEME RELATING TO STRUCTURAL AND PHYSICAL ASPECTS OF SOLID INORGANIC COMPOUNDS
- C01P2002/00—Crystal-structural characteristics
- C01P2002/70—Crystal-structural characteristics defined by measured X-ray, neutron or electron diffraction data
- C01P2002/72—Crystal-structural characteristics defined by measured X-ray, neutron or electron diffraction data by d-values or two theta-values, e.g. as X-ray diagram
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01P—INDEXING SCHEME RELATING TO STRUCTURAL AND PHYSICAL ASPECTS OF SOLID INORGANIC COMPOUNDS
- C01P2002/00—Crystal-structural characteristics
- C01P2002/80—Crystal-structural characteristics defined by measured data other than those specified in group C01P2002/70
- C01P2002/82—Crystal-structural characteristics defined by measured data other than those specified in group C01P2002/70 by IR- or Raman-data
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- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Inorganic Chemistry (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Luminescent Compositions (AREA)
Abstract
The invention relates to a praseodymium ion activated near infrared emission material, which takes phosphate as a matrix and praseodymium ion (Pr3+) as an activator, and has a chemical formula of Na0.8K0.2Bi44xPr4xPO9, wherein x is the mole number of the praseodymium ion (Pr3+) substituted bismuth ion (Bi3+), and x is 0.005 to or less than 0.07. The material shows effective near infrared emission of 0.95-1.2 microns, corresponds to 1D 2-3F2,3,4 radiation transition of Pr3+ ions, has strong excitation in a near ultraviolet blue light red light range (400-650 nanometers), and shows effective near infrared emission in the excitation range. The material synthesized by the invention has stable physical and chemical properties, simple and feasible preparation method, low raw material cost, good powder crystallinity and no environmental pollution. Is expected to be used as near infrared emitting material.
Description
Technical Field
The invention relates to a praseodymium ion activated near infrared emission material and a preparation method thereof, belonging to the technical field of inorganic fluorescent materials.
Background
Near infrared light (780-2526, nm) is the earliest recognized electromagnetic wave in the non-visible region, and modern near infrared spectroscopy was the fastest growing and most attractive spectroscopic analysis technique since the 90 s. Near infrared light exhibits excellent spectral characteristics, with no visibility to the naked eye; high penetration in haze, smoke and dust; has low light scattering and absorption in biological tissue; optical amplification and the like can be realized. In recent years, the near infrared luminescent material is a promising material because of the characteristics of large penetration depth (applicable to biomedical application), no toxicity, up-conversion luminescence and the like, and is widely applied to the fields of illumination and display equipment, temperature sensing, solar cells, chemical analysis, biological imaging, modern optical fiber communication, night vision monitoring and the like.
Common activating ions for realizing near infrared luminescent materials are bismuth ions (Bi 3+ ) Chromium ion (Cr) 3 + ) C and lanthanide rare earth ions (Ln 3+ ) Etc.; in the lanthanide rare earth ions, praseodymium ions (Pr 3+ ) Has a unique 4f energy level structure, pr when light absorption and light emission in the middle-infrared wavelength region visible from ultraviolet can be realized 3+ Has excellent radiation transition characteristics in the near infrared wavelength region, e.g 1 D 2 → 3 F 2,3,4 (800-1200 nm), 1 G 4 → 3 H 5 (-1300 nm), 1 D 2 → 1 G 4 (-1500 nanometers), the infrared-emitting material has the unique advantages of wide infrared emission spectrum coverage, high output power, good spatial resolution and the like, and is one of the preferred luminescent materials of the near infrared photoelectric device. The patent uses praseodymium ions (Pr 3+ ) The novel near infrared emission material is synthesized by taking phosphate as a matrix and adopting a component design and a solid phase reaction method which is convenient and quick to use.
Disclosure of Invention
In order to solve the problems of low emission efficiency, short wavelength, poor application stability, complex preparation method and the like of the existing near infrared luminescent material, the invention provides a near infrared luminescent material and a preparation method thereof, wherein the near infrared luminescent material can be effectively excited by blue light and red light and emits broadband near infrared light at 850-1100 nm.
In order to achieve the above purpose, the invention adopts the technical scheme that:
praseodymium ion activated near infrared emission material, and molecular formula is written as Na 0.8 K 0.2 Bi 4-4x Pr 4x PO 9 Wherein x is praseodymium ion (Pr 3+ ) Doping with substituted bismuth ions (Bi) 3+ ) X is more than or equal to 0.005 and less than or equal to 0.07.
The invention is further arranged to comprise the steps of:
(1) According to chemical formula Na 0.8 K 0.2 Bi 4-4x Pr 4x PO 9 The stoichiometric ratio of each element, wherein x is more than or equal to 0.005 and less than or equal to 0.07, respectively weighing the bismuth ion (Bi) 3+ ) Compounds of (2) containing sodium ionsSon (Na) + ) A compound containing potassium ion (K) + ) A compound containing praseodymium ion (Pr) 3+ ) A compound of (2) containing a phosphorus ion (P) 5+ ) Mixing and grinding the compounds uniformly;
(2) Pre-calcining the raw material mixture obtained in the step (1) in an air atmosphere, wherein the calcining temperature is 350-750 ℃ and the pre-calcining time is 1-10 hours;
(3) And (3) carrying out solid-phase reaction synthesis sintering on the precalcined mixture obtained in the step (2) in an air atmosphere, wherein the sintering temperature is 750-850 ℃, the sintering time is 1-10 hours, and naturally cooling the sintered product to room temperature to obtain the praseodymium ion activated near infrared emission material.
The invention is further arranged that the catalyst contains sodium ions (Na + ) The compound of (a) is sodium carbonate (Na 2 CO 3 ) But is not limited to this compound; the composition contains potassium ion (K + ) The compound of (C) is potassium carbonate (K) 2 CO 3 ) But is not limited to this compound; the bismuth ion (Bi) 3+ ) The compound of (a) is bismuth oxide (Bi) 2 O 3 ) But is not limited to this compound; the praseodymium ion (Pr) 3+ ) The compound of (a) is praseodymium oxide (Pr) 6 O 11 ) But is not limited to this compound; the phosphorus ion (P) 5 + ) The compound of (a) is monoammonium phosphate (NH) 4 H 2 PO 4 ) But is not limited to this compound either.
The present invention is further configured such that the pre-calcination frequency for the raw material mixture is one or more times, and the preferable pre-calcination frequency is 2 to 3 times.
Compared with the prior art, the technical scheme of the invention has the advantages that:
1. compared with the existing similar materials, the matrix material of the patent has the advantages that: the crystal lattice is made of PO with high rigidity 4 The polyhedron is formed in three-dimensional space, and the prepared near infrared emitting material has high thermal stability.
2. Lattice ionsBismuth ion has d 10 The characteristic lone electron of the electron configuration of (2) causes the material to have high polarization, resulting in effective light absorption in the visible wavelength range; bismuth ion (Bi) 3+ ) Is specific to praseodymium ions (Pr) 3+ ) Has great sensitization.
3. The praseodymium ion activated near infrared emission material obtained by the method has the advantages of effective light absorption in visible light, high near infrared luminous efficiency and good thermal stability.
4. The preparation method of the praseodymium ion activated near infrared emission material is simple and feasible, has low production cost and does not pollute the environment.
Drawings
FIG. 1 is a comparison of the X-ray powder diffraction pattern of the sample prepared in example 1 of the present invention with a standard card;
FIG. 2 shows the near infrared emission spectrum of the sample prepared in example 1 of the present invention;
FIG. 3 excitation spectrum of sample prepared in example 1 of the present invention;
FIG. 4 is a comparison of the X-ray powder diffraction pattern of the sample obtained in example 2 of the present invention with a standard card;
FIG. 5 near infrared emission spectrum of the sample prepared in example 2 of the present invention;
FIG. 6 excitation spectrum of sample prepared in example 2 of the present invention;
FIG. 7 is a comparison of the X-ray powder diffraction pattern of the sample prepared in example 3 of the present invention with a standard card;
FIG. 8 near infrared emission spectrum of the sample prepared in example 3 of the present invention;
FIG. 9 shows the excitation spectrum of the sample obtained in example 3 of the present invention.
Detailed Description
The technical scheme of the invention is further described below with reference to the attached drawings and specific embodiments.
Example 1
According to chemical formula Na 0.8 K 0.2 Bi 3.88 Pr 0.12 PO 9 The molar ratio of each element in the mixture is measured to obtain sodium carbonate Na 2 CO 3 :0.551 g of potassium carbonate K 2 CO 3 :0.18 g of bismuth oxide Bi 2 O 3 :7.884 g and praseodymium oxide Pr 6 O 11 :0.266 g of monoammonium phosphate NH 4 H 2 PO 4 :1.495 grams. The raw materials weighed according to the weight are placed in an agate mortar and fully ground to be fully and uniformly mixed, then the obtained mixture is placed in a crucible and is pre-calcined for the first time in a muffle furnace under the air atmosphere, wherein the pre-calcination temperature is 350 ℃, and the pre-calcination time is 10 hours; naturally cooling the obtained first pre-calcined mixture to room temperature, and fully grinding to fully mix the mixture. Then pre-calcining for the second time in air atmosphere, wherein the pre-calcining temperature is 750 ℃ and the pre-calcining time is 1 hour; naturally cooling the mixture of the second precalcination to room temperature, fully grinding to uniformly mix the mixture, putting the mixture into a crucible, and carrying out third solid-phase reaction sintering in an air atmosphere at the sintering temperature of 850 ℃ for 4 hours. And naturally cooling the third sintered product to room temperature to obtain the praseodymium ion activated near infrared emission material.
Referring to FIG. 1, the X-ray powder diffraction pattern of the sample prepared according to the technical scheme of example 1 is compared with that of standard cards 28-1047, and the positions and the relative intensities of the diffraction peaks are completely consistent with those of the standard cards, which indicates that the sample prepared in example 1 is a pure phase. Referring to fig. 2, a luminescence spectrum of the sample prepared according to the technical scheme of example 1 is shown, and it can be seen that the emission spectrum shows near infrared emission of 0.8-1.2 microns. Referring to fig. 3, an excitation spectrum of a sample prepared according to the technical scheme of this example 1 is shown, and the near infrared emission material has very effective excitation in blue and red regions of visible light.
Example 2
According to chemical formula Na 0.8 K 0.2 Bi 3.76 Pr 0.24 PO 9 The molar ratio of each element in the mixture is measured to obtain sodium carbonate Na 2 CO 3 :0.466 g of potassium carbonate K 2 CO 3 :0.152 g of bismuth oxide Bi 2 O 3 :6.464 g and praseodymium oxide Pr 6 O 11 :0.449 g of monoammonium phosphate NH 4 H 2 PO 4 :1.265 g. The raw materials weighed according to the weight are placed in an agate mortar and fully ground to be fully and uniformly mixed, then the obtained mixture is placed in a crucible and is pre-calcined for the first time in a muffle furnace under the air atmosphere, wherein the pre-calcination temperature is 350 ℃, and the pre-calcination time is 3 hours; naturally cooling the obtained first pre-calcined mixture to room temperature, and fully grinding to fully mix the mixture. Then pre-calcining for the second time in air atmosphere, wherein the pre-calcining temperature is 550 ℃ and the pre-calcining time is 5 hours; naturally cooling the mixture subjected to the second precalcination to room temperature, fully grinding and uniformly mixing the mixture, putting the mixture into a crucible, and carrying out third precalcination in an air atmosphere at a precalcination temperature of 750 ℃ for 6 hours; naturally cooling the mixture subjected to the third precalcination to room temperature, fully grinding and uniformly mixing the mixture, putting the mixture into a crucible, and carrying out the fourth solid-phase reaction sintering in an air atmosphere at the sintering temperature of 800 ℃ for 5 hours. And naturally cooling the fourth sintering product to room temperature to obtain the praseodymium ion activated near infrared emission material.
Referring to FIG. 4, the X-ray powder diffraction pattern of the sample prepared according to the technical scheme of example 2 was compared with the standard cards 28-1047, and the positions and relative intensities of the diffraction peaks were completely identical to those of the standard cards, which indicated that the sample prepared in example 1 was a pure phase. Referring to FIG. 5, a graph of luminescence spectrum of a sample prepared according to the technical scheme of example 2 shows that the emission spectrum shows near infrared emission of 0.8-1.2 microns. Referring to fig. 6, an excitation spectrum of a sample prepared according to the technical scheme of this example 2 is shown, and the near infrared emission material has very effective excitation in blue and red regions of visible light.
Example 3
According to chemical formula Na 0.8 K 0.2 Bi 3.98 Pr 0.02 PO 9 Molar ratio of each element, sodium carbonate Na 2 CO 3 :1.314 g, potassium carbonate K 2 CO 3 :0.428 g of bismuth oxide Bi 2 O 3 :19.284 g and praseodymium oxide Pr 6 O 11 :0.105 g of monoammonium phosphate NH is weighed 4 H 2 PO 4 ：3566 g. The raw materials weighed according to the weight are placed in an agate mortar and fully ground to be fully and uniformly mixed, then the obtained mixture is placed in a crucible and is pre-calcined for the first time in a muffle furnace under the air atmosphere, wherein the pre-calcination temperature is 400 ℃, and the pre-calcination time is 6 hours; naturally cooling the obtained first pre-calcined mixture to room temperature, and fully grinding to fully mix the mixture. Then pre-calcining for the second time in air atmosphere, wherein the pre-calcining temperature is 700 ℃ and the pre-calcining time is 3 hours; naturally cooling the mixture of the second precalcination to room temperature, fully grinding to uniformly mix the mixture, putting the mixture into a crucible, and carrying out third solid-phase reaction sintering in an air atmosphere at the sintering temperature of 830 ℃ for 5 hours. And naturally cooling the third sintered product to room temperature to obtain the praseodymium ion activated near infrared emission material.
Referring to FIG. 7, the X-ray powder diffraction pattern of the sample prepared according to the technical scheme of example 3 was compared with the standard cards 28-1047, and the positions and relative intensities of the diffraction peaks were completely identical to those of the standard cards, indicating that the sample prepared in example 1 was a pure phase. Referring to FIG. 8, a graph of the luminescence spectrum of a sample prepared according to the technical scheme of example 3 shows that the emission spectrum shows near infrared emission of 0.8-1.2 microns. Referring to fig. 9, an excitation spectrum of a sample prepared according to the technical scheme of this example 3 is shown, and the near infrared emission material has very effective excitation in blue and red regions of visible light.
Claims (4)
1. Praseodymium ion activated near infrared emission material, and molecular formula is written as Na 0.8 K 0.2 Bi 4-4x Pr 4x PO 9 Wherein x is praseodymium ion Pr 3+ Doping of substituted bismuth ions Bi 3+ X is more than or equal to 0.005 and less than or equal to 0.07.
2. The method for preparing the praseodymium ion activated near infrared emission material according to claim 1, wherein the method comprises the following steps: the method comprises the following steps: according to chemical formula Na 0.8 K 0.2 Bi 4-4x Pr 4x PO 9 Stoichiometric ratio of each element in (a)X is more than or equal to 0.005 and less than or equal to 0.07, and Bi containing bismuth ions is respectively weighed 3+ A compound containing Na ion + A compound containing potassium ion K + A compound containing praseodymium ions Pr 3+ A compound containing phosphorus ion P 5+ Mixing and grinding the compounds uniformly; pre-calcining the raw material mixture obtained in the step (1) in an air atmosphere, wherein the calcining temperature is 350-750 ℃ and the pre-calcining time is 1-10 hours; and (3) carrying out solid-phase reaction synthesis sintering on the precalcined mixture obtained in the step (2) in an air atmosphere, wherein the sintering temperature is 750-850 ℃, the sintering time is 1-10 hours, and naturally cooling the sintered product to room temperature to obtain the praseodymium ion activated near infrared emission material.
3. The method for preparing the praseodymium ion activated near infrared emission material according to claim 2, wherein the method comprises the following steps: the sodium ion Na + The compound of (a) is sodium carbonate Na 2 CO 3 The method comprises the steps of carrying out a first treatment on the surface of the The said composition contains potassium ion K + The compound of (a) is potassium carbonate K 2 CO 3 The method comprises the steps of carrying out a first treatment on the surface of the The bismuth ion Bi 3+ The compound of (a) is bismuth oxide Bi 2 O 3 The method comprises the steps of carrying out a first treatment on the surface of the The Pr contains praseodymium ions Pr 3+ The compound of (a) is praseodymium oxide Pr 6 O 11 The method comprises the steps of carrying out a first treatment on the surface of the The phosphorus ion P 5+ The compound of (2) is monoammonium phosphate NH 4 H 2 PO 4 。
4. The method for preparing a praseodymium ion activated near infrared emission material according to claim 2, wherein the pre-calcination of the raw materials is characterized in that: the pre-calcination frequency for the raw material mixture is 2 to 3 times.
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