CN110129048B - Mn (manganese)2+Activated niobium tantalate yellow luminescent phosphor and preparation and application thereof - Google Patents
Mn (manganese)2+Activated niobium tantalate yellow luminescent phosphor and preparation and application thereof Download PDFInfo
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- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 title claims abstract description 30
- 239000011572 manganese Substances 0.000 title claims abstract description 24
- 150000002821 niobium Chemical class 0.000 title claims abstract description 21
- 238000002360 preparation method Methods 0.000 title claims abstract description 11
- PUZPDOWCWNUUKD-UHFFFAOYSA-M sodium fluoride Chemical compound [F-].[Na+] PUZPDOWCWNUUKD-UHFFFAOYSA-M 0.000 claims abstract description 26
- 239000000843 powder Substances 0.000 claims abstract description 22
- WAEMQWOKJMHJLA-UHFFFAOYSA-N Manganese(2+) Chemical compound [Mn+2] WAEMQWOKJMHJLA-UHFFFAOYSA-N 0.000 claims abstract description 17
- 239000011775 sodium fluoride Substances 0.000 claims abstract description 16
- 235000013024 sodium fluoride Nutrition 0.000 claims abstract description 13
- 239000000126 substance Substances 0.000 claims abstract description 13
- 238000002156 mixing Methods 0.000 claims abstract description 10
- 238000003825 pressing Methods 0.000 claims abstract description 10
- BHPQYMZQTOCNFJ-UHFFFAOYSA-N Calcium cation Chemical class [Ca+2] BHPQYMZQTOCNFJ-UHFFFAOYSA-N 0.000 claims abstract description 9
- 229910001424 calcium ion Inorganic materials 0.000 claims abstract description 9
- 229910001437 manganese ion Inorganic materials 0.000 claims abstract description 9
- 239000004065 semiconductor Substances 0.000 claims abstract description 6
- DDFHBQSCUXNBSA-UHFFFAOYSA-N 5-(5-carboxythiophen-2-yl)thiophene-2-carboxylic acid Chemical compound S1C(C(=O)O)=CC=C1C1=CC=C(C(O)=O)S1 DDFHBQSCUXNBSA-UHFFFAOYSA-N 0.000 claims abstract description 5
- 238000010532 solid phase synthesis reaction Methods 0.000 claims abstract description 5
- 238000000034 method Methods 0.000 claims abstract description 4
- 150000001875 compounds Chemical class 0.000 claims description 25
- 238000001354 calcination Methods 0.000 claims description 24
- 239000000203 mixture Substances 0.000 claims description 24
- 238000000227 grinding Methods 0.000 claims description 23
- 238000005303 weighing Methods 0.000 claims description 14
- VTYYLEPIZMXCLO-UHFFFAOYSA-L Calcium carbonate Chemical compound [Ca+2].[O-]C([O-])=O VTYYLEPIZMXCLO-UHFFFAOYSA-L 0.000 claims description 9
- 230000005284 excitation Effects 0.000 claims description 8
- 229910052758 niobium Inorganic materials 0.000 claims description 8
- 239000010955 niobium Substances 0.000 claims description 8
- 239000002994 raw material Substances 0.000 claims description 8
- 239000011575 calcium Substances 0.000 claims description 7
- 238000001816 cooling Methods 0.000 claims description 7
- 239000011656 manganese carbonate Substances 0.000 claims description 6
- 229910000016 manganese(II) carbonate Inorganic materials 0.000 claims description 6
- -1 niobium ion Chemical class 0.000 claims description 6
- 229910001460 tantalum ion Inorganic materials 0.000 claims description 6
- 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 claims description 5
- 229910000019 calcium carbonate Inorganic materials 0.000 claims description 5
- 239000011734 sodium Substances 0.000 claims description 5
- 229910052708 sodium Inorganic materials 0.000 claims description 5
- 239000012769 display material Substances 0.000 claims description 2
- 235000006748 manganese carbonate Nutrition 0.000 claims description 2
- 229940093474 manganese carbonate Drugs 0.000 claims description 2
- XMWCXZJXESXBBY-UHFFFAOYSA-L manganese(ii) carbonate Chemical compound [Mn+2].[O-]C([O-])=O XMWCXZJXESXBBY-UHFFFAOYSA-L 0.000 claims description 2
- ZKATWMILCYLAPD-UHFFFAOYSA-N niobium pentoxide Inorganic materials O=[Nb](=O)O[Nb](=O)=O ZKATWMILCYLAPD-UHFFFAOYSA-N 0.000 claims description 2
- BPUBBGLMJRNUCC-UHFFFAOYSA-N oxygen(2-);tantalum(5+) Chemical compound [O-2].[O-2].[O-2].[O-2].[O-2].[Ta+5].[Ta+5] BPUBBGLMJRNUCC-UHFFFAOYSA-N 0.000 claims description 2
- 229910001936 tantalum oxide Inorganic materials 0.000 claims description 2
- ZCCIPPOKBCJFDN-UHFFFAOYSA-N calcium nitrate Chemical compound [Ca+2].[O-][N+]([O-])=O.[O-][N+]([O-])=O ZCCIPPOKBCJFDN-UHFFFAOYSA-N 0.000 claims 2
- PWHULOQIROXLJO-UHFFFAOYSA-N Manganese Chemical compound [Mn] PWHULOQIROXLJO-UHFFFAOYSA-N 0.000 claims 1
- 229910052748 manganese Inorganic materials 0.000 claims 1
- URLJKFSTXLNXLG-UHFFFAOYSA-N niobium(5+);oxygen(2-) Chemical compound [O-2].[O-2].[O-2].[O-2].[O-2].[Nb+5].[Nb+5] URLJKFSTXLNXLG-UHFFFAOYSA-N 0.000 claims 1
- 239000002243 precursor Substances 0.000 abstract 2
- PXGOKWXKJXAPGV-UHFFFAOYSA-N Fluorine Chemical compound FF PXGOKWXKJXAPGV-UHFFFAOYSA-N 0.000 abstract 1
- 239000003054 catalyst Substances 0.000 abstract 1
- 229910052731 fluorine Inorganic materials 0.000 abstract 1
- 239000011737 fluorine Substances 0.000 abstract 1
- 238000005245 sintering Methods 0.000 abstract 1
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 8
- 239000004570 mortar (masonry) Substances 0.000 description 8
- 238000005286 illumination Methods 0.000 description 7
- 238000000695 excitation spectrum Methods 0.000 description 6
- 238000000295 emission spectrum Methods 0.000 description 4
- 150000002500 ions Chemical class 0.000 description 4
- 239000000463 material Substances 0.000 description 3
- 239000011159 matrix material Substances 0.000 description 3
- 239000012856 weighed raw material Substances 0.000 description 3
- 238000001748 luminescence spectrum Methods 0.000 description 2
- 238000004020 luminiscence type Methods 0.000 description 2
- 238000000634 powder X-ray diffraction Methods 0.000 description 2
- 238000009877 rendering Methods 0.000 description 2
- 238000001878 scanning electron micrograph Methods 0.000 description 2
- 229910019901 yttrium aluminum garnet Inorganic materials 0.000 description 2
- NHNBFGGVMKEFGY-UHFFFAOYSA-N Nitrate Chemical compound [O-][N+]([O-])=O NHNBFGGVMKEFGY-UHFFFAOYSA-N 0.000 description 1
- 239000012190 activator Substances 0.000 description 1
- JNDMLEXHDPKVFC-UHFFFAOYSA-N aluminum;oxygen(2-);yttrium(3+) Chemical compound [O-2].[O-2].[O-2].[Al+3].[Y+3] JNDMLEXHDPKVFC-UHFFFAOYSA-N 0.000 description 1
- LDDQLRUQCUTJBB-UHFFFAOYSA-N ammonium fluoride Chemical compound [NH4+].[F-] LDDQLRUQCUTJBB-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 230000000295 complement effect Effects 0.000 description 1
- 238000002425 crystallisation Methods 0.000 description 1
- 230000008025 crystallization Effects 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- GUCVJGMIXFAOAE-UHFFFAOYSA-N niobium atom Chemical compound [Nb] GUCVJGMIXFAOAE-UHFFFAOYSA-N 0.000 description 1
- 239000012071 phase Substances 0.000 description 1
- 229910019655 synthetic inorganic crystalline material Inorganic materials 0.000 description 1
- 229910052715 tantalum Inorganic materials 0.000 description 1
- PBCFLUZVCVVTBY-UHFFFAOYSA-N tantalum pentoxide Inorganic materials O=[Ta](=O)O[Ta](=O)=O PBCFLUZVCVVTBY-UHFFFAOYSA-N 0.000 description 1
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- 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
- C09K11/67—Luminescent, e.g. electroluminescent, chemiluminescent materials containing inorganic luminescent materials containing refractory metals
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- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L33/00—Semiconductor devices having potential barriers specially adapted for light emission; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof
- H01L33/48—Semiconductor devices having potential barriers specially adapted for light emission; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof characterised by the semiconductor body packages
- H01L33/50—Wavelength conversion elements
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- H01L33/502—Wavelength conversion materials
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Abstract
The invention discloses Mn2+Activated niobium tantalate yellow luminescent phosphor and preparation and application thereof, wherein the chemical formula of the phosphor is NaCa1‑xMnxTaNbO6F, x is a divalent manganese ion Mn2+Substituted Ca2+X is more than or equal to 0.001 and less than or equal to 0.2, firstly, preparing a precursor Ca without fluorine by using a solid-phase synthesis method1‑xMnxTaNbO6(x is more than or equal to 0.001 and less than or equal to 0.2); then adding sodium fluoride and ammonium fluoride into the precursor, fully mixing, pressing into blocks, and sintering by solid-phase synthesis again to obtain the catalyst. The fluorescent powder provided by the invention can well absorb near ultraviolet light and emit pure yellow light, can be well matched with a near ultraviolet semiconductor LED chip, and is a potential yellow luminescent powder for preparing a white light LED lighting device.
Description
Technical Field
The invention relates to the field of inorganic fluorescent materials, in particular to Mn2+Activated niobium tantalate yellow luminescent phosphor and preparation and application thereof.
Background
In recent years, with the innovation and development of semiconductors, the LED illumination based on semiconductors is greatly valued, the illumination based on purple light and near ultraviolet light semiconductor chips forms the mainstream commercial white light LED illumination device at present, and compared with the traditional fluorescent lamp, energy-saving illumination and other light sources, the rapidly developed new generation illumination based on the LED chips has great advantages, such as long service life, the LED illumination can work for more than 50000 hours without faults, and the service life is hundreds of times of that of an incandescent lamp; the power is saved, the power consumption of the LED is only 1/10 of that of an incandescent lamp, and the use voltage range is wide; brightness far exceeds that of incandescent lamps, etc.
At present, the principle of coating efficient fluorescent powder which can be excited by blue light to emit yellow light on a blue LED chip is commonly adopted for realizing the white light LED, the blue light LED excites a fluorescent material to generate yellow light which is complementary with the blue light, and then the blue light and the yellow light are mixed by utilizing the lens principle, so that human eyes generate the vision of the white light. The fluorescent powder is mainly YAG yttrium aluminum garnet with the chemical formula of Y3Al5O12:Ce3+But due to its luminescence center Ce3+The emission of the fluorescent powder is seriously short in a red light part, so that the color rendering of a white light LED product is poor, the low color temperature illumination requirement is difficult to meet, and the fluorescent powder is difficult to obtain the white light LED with the low color temperature below 4000K. Therefore, the research of the novel yellow fluorescent powder for the LED, which has good excitation efficiency in the near ultraviolet light and blue light interval, is very important.
Disclosure of Invention
An object of the present invention is to provide a Mn2+The activated niobium tantalate yellow luminescent fluorescent powder can be excited by near ultraviolet light or blue light.
Another object of the present invention is to provide the above Mn2+A preparation method of activated niobium tantalate yellow luminescent phosphor.
It is another object of the present invention to provide the above Mn2+The application of the activated niobium tantalate yellow luminescent phosphor.
In order to achieve the purpose, the technical scheme adopted by the invention is as follows: mn (manganese)2+Activated niobium tantalate yellow luminescent phosphor with chemical formula of NaCa1-xMnxTaNbO6F, x is a divalent manganese ion Mn2+Substituted Ca2+The value range of x is more than or equal to 0.001 and less than or equal to 0.2.
The matrix of the fluorescent powder is NaCaTaNbO6F，Mn2+The ions are activators.
The present invention also provides the above Mn2+The preparation method of the activated niobium tantalate yellow luminescent phosphor adopts a solid-phase synthesis method, and comprises the following specific steps:
(1) according to the chemical formula Ca1-xMnxTaNbO6The stoichiometric ratio of each element in x is more than or equal to 0.001 and less than or equal to 0.2, and the elements are respectively called a calcium ion-containing compound, a manganese ion-containing compound, a tantalum ion-containing compound and a niobium ion-containing compound; according to the chemical formula NaCa1-xMnxTaNbO6F, weighing sodium fluoride according to the stoichiometric ratio of sodium element in the x which is more than or equal to 0.001 and less than or equal to 0.2, and then weighing ammonium fluoride with the same molar quantity as the sodium fluoride;
(2) weighing the raw materials obtained in the step (1): grinding and mixing a calcium ion-containing compound, a manganese ion-containing compound, a tantalum ion-containing compound and a niobium ion-containing compound, and then placing the mixture in an air atmosphere for pre-calcination at 850-1200 ℃ for 1-10 hours;
(3) grinding the pre-calcined raw material obtained in the step (2) again, pressing the obtained mixture into blocks, and placing the blocks in an air atmosphere for secondary calcination, wherein the calcination temperature is 1200-1400 ℃, and the calcination time is 1-10 hours;
(4) naturally cooling the product obtained in the step (3), grinding the product into powder, thoroughly grinding and mixing the powder and the sodium fluoride and the ammonium fluoride weighed in the step (1), pressing the obtained mixture into blocks, calcining the blocks in air atmosphere at 850-1000 ℃ for 1-10 hours, naturally cooling the blocks to room temperature, and grinding the blocks to obtain Mn2+Activated niobium tantalate yellow luminescent phosphor.
Preferably, the compound containing calcium ions is calcium carbonate CaCO3Ca (NO), Ca nitrate3)2One of (1); the compound containing manganese ions is manganese carbonate MnCO3(ii) a The compound containing tantalum ions is tantalum oxide Ta2O5(ii) a The compound containing niobium ions is niobium pentoxide Nb2O5。
The present invention also provides the above Mn2+The luminescent application of the activated niobium tantalate yellow luminescent phosphor.
The fluorescent powder can be effectively lasered in an ultraviolet-blue light region between 200 and 500 nanometers to emit yellow light with a central wavelength of 565 nanometers, is suitable for preparing an LED (light-emitting diode) lighting or display device taking a near-ultraviolet and blue-light semiconductor chip as an excitation light source, and can also be used in the manufacture of light-emitting diodes, display materials, three-primary-color fluorescent lamps and field emission displays.
Compared with the prior art, the invention has the following beneficial effects:
1. mn of the invention2+The activated niobium tantalate yellow luminous fluorescent powder has matrix lattice comprising multiple ion polyhedrons (Nb, Ta), and negative ions bonded with F ions, so that it has very high lattice strength and thus fluorescent lightThe powder has excellent thermal stability and is suitable for preparing high-power lighting equipment.
2. The excitation spectrum of the yellow luminescent phosphor is 200 nm-500 nm, the main excitation peak is 330nm, the emission spectrum is 500 nm-620 nm, the main peak is near 565nm, and the yellow luminescent phosphor has the advantages of stable chemical property, good luminescent property, high luminescent intensity and higher color rendering index; compared with the existing common commercial yellow-light-emitting fluorescent powder, the fluorescent powder has strong excitation efficiency in near ultraviolet and blue light wavelength regions, and is more suitable for preparing white-light LED lighting equipment prepared by matching near ultraviolet LED diode chips.
3. The preparation method of the manganese-doped yellow fluorescent powder with niobium tantalate as the matrix is based on a solid-phase synthesis method, has strong operability, is mainly prepared in air atmosphere, has a simple heating process, is simple and easy to implement, has good reproducibility and is short in preparation period.
Drawings
FIG. 1 is an X-ray powder diffraction pattern of a phosphor prepared in example 1 of the present invention.
FIG. 2 is an SEM image of phosphor prepared in example 1 of the present invention.
FIG. 3 shows the excitation spectrum of the phosphor prepared in example 1 of the present invention at 565 nm.
FIG. 4 shows the emission spectrum of the phosphor prepared in example 1 of the present invention under excitation at 330 nm.
Detailed Description
The invention is described in further detail below with reference to the figures and specific examples.
Example 1: NaCa0.85Mn0.15TaNbO6F
According to the chemical formula Ca0.85Mn0.15TaNbO6Weighing the following elements in stoichiometric ratio: CaCO3: 4.25 g; MnCO3: 0.862 g; ta2O5: 11.051 g; nb2O5: 6.645 g; placing the weighed raw materials into an agate mortar, carefully grinding to obtain a mixture of the raw materials, and pre-calcining the mixture in an air atmosphere at the calcining temperature of 900 ℃ for 9 hours; placing the obtained pre-calcined raw material againGrinding in an agate mortar, pressing the obtained mixture into blocks, calcining for the second time in air atmosphere at 1400 ℃ for 1 hour, naturally cooling, and grinding in the agate mortar into powder to obtain the pre-calcined mixture.
According to NaCa0.85Mn0.15TaNbO6Weighing NaF in the stoichiometric ratio of sodium element in F: 2.1 g, and weighing NH with the same molar quantity as NaF4F: 1.85 g; mixing the pre-calcined mixture with weighed NaF and NH4And F, grinding to obtain a mixture, pressing into blocks, and calcining in an air atmosphere at the calcining temperature of 1000 ℃ for 1 hour. Grinding the naturally cooled block sample to obtain the Mn2+Activated niobium tantalate yellow luminescent phosphor.
Referring to the attached figure 1, the X-ray powder diffraction pattern of the fluorescent powder prepared by the technical scheme of the embodiment 1 shows that the prepared material is a single phase and has no other impurities;
referring to the attached figure 2, the SEM image of the phosphor prepared according to the technical scheme of the embodiment 1 is good in crystallization property;
referring to the attached figure 3, the excitation spectrum of the phosphor prepared according to the technical scheme of the embodiment 1 at 565nm is monitored. The excitation spectrum shows that the excitation source of yellow luminescence is mainly in the ultraviolet to blue light region between 200 and 500 nanometers, and the emission of the yellow luminescence can be well matched with that of a near ultraviolet LED chip;
referring to fig. 4, it is the emission spectrum under near ultraviolet 330nm excitation of the phosphor prepared according to the technical scheme of example 1. The emission spectrum showed that the emission was a very pure-chroma yellow emission with a central emission wavelength of 565 nm.
Example 2: NaCa0.999Mn0.001TaNbO6F
According to the chemical formula Ca0.999Mn0.001TaNbO6Weighing the following elements in stoichiometric ratio: ca (NO)3)2: 14.74 g; MnCO3: 0.011 g; ta2O5: 19.89 g; nb2O5: 11.96 g; placing the weighed raw materials into an agate mortar, and carefully grinding to obtain a mixture of the raw materialsPre-calcining the compound in an air atmosphere at 1200 ℃ for 1 hour; and grinding the obtained pre-calcined raw material in an agate mortar again, pressing the obtained mixture into blocks, calcining for the second time in an air atmosphere at the calcining temperature of 1200 ℃ for 10 hours, naturally cooling, and grinding the blocks in the agate mortar into powder to obtain the pre-calcined mixture.
According to NaCa0.999Mn0.001TaNbO6Weighing NaF in the stoichiometric ratio of sodium element in F: 3.78 g, and weighing NH in an amount equimolar to NaF4F: 3.33 g; mixing the pre-calcined mixture with weighed NaF and NH4And F, grinding and mixing, pressing the obtained mixture into blocks, and calcining in an air atmosphere at 850 ℃ for 10 hours. Grinding the naturally cooled block sample to obtain the Mn2+Activated niobium tantalate yellow luminescent phosphor.
The main structural properties, excitation spectrum and luminescence spectrum are similar to those of example 1.
Example 3: NaCa0.8Mn0.2TaNbO6F
According to the chemical formula Ca0.8Mn0.2TaNbO6Weighing the following elements in stoichiometric ratio: CaCO3: 4.8 g; MnCO3: 1.380 g; ta2O5: 13.26 g; nb2O5: 7.974 g; placing the weighed raw materials into an agate mortar, carefully grinding to obtain a mixture of the raw materials, and pre-calcining the mixture in an air atmosphere at 850 ℃ for 10 hours; and (3) grinding the obtained pre-calcined raw material in an agate mortar again, pressing the obtained mixture into blocks, calcining for the second time in an air atmosphere, wherein the calcining temperature is 1300 ℃, the calcining time is 4 hours, and naturally cooling the product obtained in the step to obtain a pre-calcined substance.
According to NaCa0.8Mn0.2TaNbO6Weighing NaF in the stoichiometric ratio of sodium element in F: 2.52 g, and weighing NH in an amount equimolar to NaF4F: 2.22 g; mixing the pre-calcined mixture with weighed NaF and NH4F grinding and mixing to obtainThe obtained mixture was pressed into a block and calcined in an air atmosphere at 900 ℃ for 5 hours. Grinding the naturally cooled block sample to obtain the Mn2+Activated niobium tantalate yellow luminescent phosphor.
The main structural properties, excitation spectrum and luminescence spectrum are similar to those of example 1.
Claims (4)
1. Mn (manganese)2+The activated niobium tantalate yellow luminescent phosphor is characterized in that the chemical formula of the phosphor is NaCa1-xMnxTaNbO6F, x is a divalent manganese ion Mn2+Substituted Ca2+X is more than or equal to 0.001 and less than or equal to 0.2, and Mn2+The preparation method of the activated niobium tantalate yellow luminescent phosphor adopts a solid-phase synthesis method, and comprises the following specific steps:
(1) according to the chemical formula Ca1-xMnxTaNbO6The stoichiometric ratio of each element in x is more than or equal to 0.001 and less than or equal to 0.2, and the elements are respectively called a calcium ion-containing compound, a manganese ion-containing compound, a tantalum ion-containing compound and a niobium ion-containing compound; according to the chemical formula NaCa1-xMnxTaNbO6F, weighing sodium fluoride according to the stoichiometric ratio of sodium element in the x which is more than or equal to 0.001 and less than or equal to 0.2, and then weighing ammonium fluoride with the same molar quantity as the sodium fluoride;
(2) grinding and mixing the calcium ion-containing compound, the manganese ion-containing compound, the tantalum ion-containing compound and the niobium ion-containing compound obtained in the step (1), and then placing the mixture in an air atmosphere for pre-calcination at the calcination temperature of 850-1200 ℃ for 1-10 hours;
(3) grinding the pre-calcined raw material obtained in the step (2) again, pressing the obtained mixture into blocks, and placing the blocks in an air atmosphere for secondary calcination, wherein the calcination temperature is 1200-1400 ℃, and the calcination time is 1-10 hours;
(4) naturally cooling the product obtained in the step (3), grinding the product into powder, thoroughly grinding and mixing the powder and the sodium fluoride and the ammonium fluoride weighed in the step (1), pressing the obtained mixture into blocks, calcining the blocks in air atmosphere at 850-1000 ℃ for 850-1000 DEG CNaturally cooling the mixture to room temperature for 1-10 hours, and grinding the cooled mixture to obtain Mn2+Activated niobium tantalate yellow luminescent phosphor.
2. Mn according to claim 12+The activated niobium tantalate yellow luminescent phosphor is characterized in that the compound containing calcium ions is one of calcium carbonate and calcium nitrate; the compound containing manganese ions is manganese carbonate; the compound containing tantalum ions is tantalum oxide; the compound containing niobium ions is niobium pentoxide.
3. An Mn as set forth in claim 12+The activated niobium tantalate yellow luminescent phosphor is applied to the preparation of LED lighting or display devices which take near ultraviolet and blue semiconductor chips as excitation light sources.
4. An Mn as set forth in claim 12+The activated niobium tantalate yellow luminescent phosphor is applied to the preparation of light-emitting diodes, display materials, tricolor fluorescent lamps and field emission displays.
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| Structures and luminescence properties of Yb3+ in the double perovskites Ba2YB"O6 (B"=Ta5+,Nb5+) phosphors;周文龙，等;《周文龙，等》;20110115;第20卷(第1期);016101 * |
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