CN108707456B - Preparation method of red-light fluorescent powder - Google Patents
Preparation method of red-light fluorescent powder Download PDFInfo
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- CN108707456B CN108707456B CN201810484872.8A CN201810484872A CN108707456B CN 108707456 B CN108707456 B CN 108707456B CN 201810484872 A CN201810484872 A CN 201810484872A CN 108707456 B CN108707456 B CN 108707456B
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- 239000000843 powder Substances 0.000 title claims abstract description 32
- 238000002360 preparation method Methods 0.000 title claims abstract description 18
- GWEVSGVZZGPLCZ-UHFFFAOYSA-N Titan oxide Chemical compound O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 claims abstract description 24
- 238000001354 calcination Methods 0.000 claims abstract description 23
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Chemical compound O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 19
- PRXRUNOAOLTIEF-ADSICKODSA-N Sorbitan trioleate Chemical compound CCCCCCCC\C=C/CCCCCCCC(=O)OC[C@@H](OC(=O)CCCCCCC\C=C/CCCCCCCC)[C@H]1OC[C@H](O)[C@H]1OC(=O)CCCCCCC\C=C/CCCCCCCC PRXRUNOAOLTIEF-ADSICKODSA-N 0.000 claims abstract description 18
- 239000004147 Sorbitan trioleate Substances 0.000 claims abstract description 18
- 239000002243 precursor Substances 0.000 claims abstract description 18
- 229960000391 sorbitan trioleate Drugs 0.000 claims abstract description 18
- 235000019337 sorbitan trioleate Nutrition 0.000 claims abstract description 18
- 238000003756 stirring Methods 0.000 claims abstract description 18
- 238000005303 weighing Methods 0.000 claims abstract description 17
- 239000000126 substance Substances 0.000 claims abstract description 14
- 239000012716 precipitator Substances 0.000 claims abstract description 11
- 238000000034 method Methods 0.000 claims abstract description 10
- 239000008367 deionised water Substances 0.000 claims abstract description 9
- 229910021641 deionized water Inorganic materials 0.000 claims abstract description 9
- 238000001035 drying Methods 0.000 claims abstract description 9
- 159000000007 calcium salts Chemical class 0.000 claims abstract description 8
- 229910001940 europium oxide Inorganic materials 0.000 claims abstract description 6
- AEBZCFFCDTZXHP-UHFFFAOYSA-N europium(3+);oxygen(2-) Chemical compound [O-2].[O-2].[O-2].[Eu+3].[Eu+3] AEBZCFFCDTZXHP-UHFFFAOYSA-N 0.000 claims abstract description 6
- OGIDPMRJRNCKJF-UHFFFAOYSA-N titanium oxide Inorganic materials [Ti]=O OGIDPMRJRNCKJF-UHFFFAOYSA-N 0.000 claims abstract description 6
- 239000002253 acid Substances 0.000 claims abstract description 5
- VTYYLEPIZMXCLO-UHFFFAOYSA-L calcium carbonate Substances [Ca+2].[O-]C([O-])=O VTYYLEPIZMXCLO-UHFFFAOYSA-L 0.000 claims description 14
- GRYLNZFGIOXLOG-UHFFFAOYSA-N Nitric acid Chemical compound O[N+]([O-])=O GRYLNZFGIOXLOG-UHFFFAOYSA-N 0.000 claims description 8
- 229910000019 calcium carbonate Inorganic materials 0.000 claims description 8
- 238000010438 heat treatment Methods 0.000 claims description 8
- 229910017604 nitric acid Inorganic materials 0.000 claims description 8
- 238000000295 emission spectrum Methods 0.000 claims description 7
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 claims description 6
- 230000005284 excitation Effects 0.000 claims description 6
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 claims description 4
- 238000004020 luminiscence type Methods 0.000 claims description 3
- 239000002994 raw material Substances 0.000 claims description 3
- 239000011575 calcium Substances 0.000 claims description 2
- 238000006243 chemical reaction Methods 0.000 claims description 2
- 239000000463 material Substances 0.000 abstract description 2
- 238000002156 mixing Methods 0.000 abstract 1
- 239000000243 solution Substances 0.000 description 15
- RSEIMSPAXMNYFJ-UHFFFAOYSA-N europium(III) oxide Inorganic materials O=[Eu]O[Eu]=O RSEIMSPAXMNYFJ-UHFFFAOYSA-N 0.000 description 12
- 239000003814 drug Substances 0.000 description 7
- 239000011159 matrix material Substances 0.000 description 5
- 238000000695 excitation spectrum Methods 0.000 description 3
- BPQQTUXANYXVAA-UHFFFAOYSA-N Orthosilicate Chemical compound [O-][Si]([O-])([O-])[O-] BPQQTUXANYXVAA-UHFFFAOYSA-N 0.000 description 2
- 229910052782 aluminium Inorganic materials 0.000 description 2
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 2
- 238000004134 energy conservation Methods 0.000 description 2
- 230000007613 environmental effect Effects 0.000 description 2
- 239000012535 impurity Substances 0.000 description 2
- 238000009776 industrial production Methods 0.000 description 2
- 238000009877 rendering Methods 0.000 description 2
- 238000010532 solid phase synthesis reaction Methods 0.000 description 2
- 229910000505 Al2TiO5 Inorganic materials 0.000 description 1
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 description 1
- 238000002441 X-ray diffraction Methods 0.000 description 1
- ULGYAEQHFNJYML-UHFFFAOYSA-N [AlH3].[Ca] Chemical compound [AlH3].[Ca] ULGYAEQHFNJYML-UHFFFAOYSA-N 0.000 description 1
- 229910052784 alkaline earth metal Inorganic materials 0.000 description 1
- 150000001342 alkaline earth metals Chemical class 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000001110 calcium chloride Substances 0.000 description 1
- 229910001628 calcium chloride Inorganic materials 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000003960 organic solvent Substances 0.000 description 1
- 230000008092 positive effect Effects 0.000 description 1
- 230000005855 radiation Effects 0.000 description 1
- -1 rare earth ion Chemical class 0.000 description 1
- 229910052761 rare earth metal Inorganic materials 0.000 description 1
- 238000012827 research and development Methods 0.000 description 1
- 230000035939 shock Effects 0.000 description 1
- 239000006104 solid solution Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
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- 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
- C09K11/67—Luminescent, e.g. electroluminescent, chemiluminescent materials containing inorganic luminescent materials containing refractory metals
- C09K11/671—Chalcogenides
- C09K11/673—Chalcogenides with alkaline earth metals
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- 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
- C09K11/7728—Luminescent, e.g. electroluminescent, chemiluminescent materials containing inorganic luminescent materials containing rare earth metals containing europium
- C09K11/7729—Chalcogenides
- C09K11/7731—Chalcogenides with alkaline earth metals
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- H—ELECTRICITY
- 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
- H01L33/501—Wavelength conversion elements characterised by the materials, e.g. binder
- H01L33/502—Wavelength conversion materials
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- Inorganic Chemistry (AREA)
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- Organic Chemistry (AREA)
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Abstract
The invention relates to a preparation method of red-light fluorescent powder, belonging to the luminescent material technologyField of chemical formula CaTi3O7:xMn4+Wherein x is more than or equal to 0.01 and less than or equal to 0.1; the method comprises the following specific steps: weighing calcium salt, titanium oxide, europium oxide and sorbitan trioleate according to the stoichiometric ratio of each element in the chemical formula; preparing a precipitant solution; dissolving europium oxide with concentrated acid, adding a proper amount of deionized water, and performing water bath treatment; adding calcium salt, titanium oxide and sorbitan trioleate, continuously stirring and uniformly mixing, dropwise adding a precipitator, adjusting the pH value, and continuously stirring for 1-4 hours; directly drying to obtain a precursor; and (3) placing the precursor in an air atmosphere furnace, calcining for 2-7h to obtain the required fluorescent powder, wherein the product has high and stable luminous intensity and is suitable for the red-light fluorescent powder for the LED.
Description
Technical Field
The invention relates to a preparation method of red-light fluorescent powder, belonging to the technical field of luminescent materials.
Background
An led (light emitting diode) is a novel light emitting device, and emits ultraviolet/near ultraviolet light or visible light under the drive of low-voltage direct current (2.5-16V). White light LED is a novel LED illuminating device which is developed based on the traditional LED and emits white light, compared with the traditional illuminating light source, the white light LED has the advantages of energy conservation, environmental protection, long service life, low energy consumption, low heat, high brightness, water resistance, shock resistance, light beam concentration, simple and convenient maintenance and the like, is known as a fourth generation green illuminating light source, and has important significance for energy conservation and environmental protection.
At present, a method for realizing a white light LED is that a blue InGaN chip excites YAG fluorescent powder to generate yellow light, and the yellow light is mixed with blue light of the chip to form white light. The YAG fluorescent powder has the defects of low color rendering index, high color temperature and the like due to the lack of red light components in the emission spectrum. In the prior art, fangbei et al of Chinese academy of sciences disclose a patent of calcium aluminum titanate solid solution red phosphor (application publication No. CN 104861969A), but the product matrix is complex, and more organic solvents are used in the preparation method; wu Yi powder of the university of agriculture and forestry of Fujian, etc. discloses a near ultraviolet excited red fluorescent powder and a preparation method and an application patent thereof (application publication No. CN 106010520A), and the product preparation adopts a high-temperature solid phase method, has more impurities and can not prepare products with uniform granularity; roxifang et al of Jiangsu Rou new materials Co., Ltd discloses a double perovskite red phosphor and a preparation method thereof (application publication No. CN 107541210A), and also has the problems that the product matrix is complex, the product preparation adopts a high-temperature solid phase method, the impurities are more, the uniform-granularity product cannot be prepared, and the like. In order to solve the above problems, a near ultraviolet (350-420 nm) radiation InGaN tube core (UVLED) is generally adopted to excite the tricolor fluorescent powder to realize the white LED. The method can select the fluorescent powder with more comprehensive emission wavelength to prepare the light color of the white light LED, so that the color rendering index and the color temperature of the white light LED are effectively improved. The fluorescent powder for the near ultraviolet white light LED has various types, wherein the aluminum and silicate fluorescent powder is relatively common, particularly, the rare earth ion activated alkaline earth metal aluminum and silicate have good thermal stability and chemical stability, the excitation spectrum of the fluorescent powder is wide, the fluorescent powder can be excited by ultraviolet, near ultraviolet and blue light and has higher luminous efficiency, the emission wavelength covers a larger range, and the emission wavelength coverage range is easier to adjust relative to YAG fluorescent powder, but the titanate matrix fluorescent powder is relatively less, and has a development prospect.
Therefore, research and development of novel red-light fluorescent powder for LEDs are probably the key for solving the technical problem of the existing white-light LED, and have wide application prospect.
Disclosure of Invention
In order to solve the problems in the prior art, the invention provides a chemical expression of CaTi3O7:xMn4+Wherein x is more than or equal to 0.01 and less than or equal to 0.1, the emission peak of the fluorescent powder is near 612nm under the excitation of 270-500nm near ultraviolet light, the luminous performance is improved by adjusting the concentration of the luminous center, and the method is suitable for preparing the red fluorescent powder of the near ultraviolet excited white light LED.
The purpose of the invention is realized as follows:
a preparation method of red-light fluorescent powder, the chemical expression of which is CaTi3O7:xMn4+Wherein x is more than or equal to 0.01 and less than or equal to 0.1, and the specific preparation method comprises the following steps:
(1) according to the chemical formula CaTi3O7:xMn4+Respectively weighing calcium salt, titanium oxide and europium oxide according to the stoichiometric ratio of the elements, and then respectively weighing sorbitan trioleate accounting for 0.2-1 wt% of the total mass of the medicaments;
(2) preparing a precipitant solution with the concentration of 1-3 mol/L;
(3) dissolving the weighed europium oxide with a proper amount of concentrated acid, adding a proper amount of deionized water, and heating to 35-80 ℃ for water bath treatment;
(4) adding the weighed calcium salt, titanium oxide and sorbitan trioleate into the solution, stirring simultaneously, dropwise adding a precipitator until the pH value of the solution is more than or equal to 7, and continuously stirring for 1-4 hours until the reaction is fully carried out;
(5) directly drying the solution to obtain a fluffy precursor;
(6) and (3) calcining the precursor in an air atmosphere furnace at the temperature of 1000-1300 ℃ for 2-7 hours to obtain the target product.
The calcium salt in the step (1) is Ca (NO)3)2·4H2O、CaCl2Or CaCO3One kind of (1).
In the invention, the precipitator in the step (2) is NH4HCO3One kind of (1).
In the invention, the concentrated acid in the step (3) is analytically pure nitric acid or hydrochloric acid.
The product prepared by the invention has uniform granularity, and the average grain diameter is 10-80 mu m.
The product prepared by the invention has high luminous efficiency and stable luminescence, and the peak value of an emission spectrum is positioned near 612nm under the excitation of near ultraviolet light.
Has the positive and beneficial effects that: 1. the fluorescent powder prepared by the invention has a very wide excitation spectrum, the peak value of the emission spectrum is positioned near 612nm under the excitation of near ultraviolet light, the luminous intensity is high, and the fluorescent powder is suitable for the red fluorescent powder excited by a near ultraviolet LED; 2. the fluorescent powder prepared by the invention is obtained by calcining at a lower temperature, the generation and doping of the matrix can be completed by one-time calcining, the time is short, the energy is saved, the raw materials are cheap and easy to obtain, the process is simple, and the industrial production is easy to realize.
Drawings
FIG. 1 is an XRD pattern of the red phosphors of examples 1 and 2;
FIG. 2 is an emission spectrum of red phosphor.
Detailed Description
The invention will be further described with reference to specific examples:
example 1:
according to the chemical formula CaTi3O7:0.01Mn4+Weighing CaCO3(A.R.)0.99mol、TiO2 3mol、Eu2O3(99.99%)0.005 mol; then 0.8wt% of sorbitan trioleate is weighed according to the total mass of the medicaments; preparation of precipitant NH4HCO3The concentration of the solution is 1 mol/L; weighing Eu2O3Dissolving with appropriate amount of nitric acid, adding appropriate amount of deionized water, heating to 35 deg.C, and performing water bath treatment; adding CaCO to the above solution3、TiO2Stirring the sorbitan trioleate simultaneously, dropwise adding a precipitator, adjusting the pH to be =8, and continuously stirring for 2 hours; directly drying to obtain a fluffy precursor; and (3) putting the precursor into an air atmosphere furnace for calcination, wherein the calcination temperature is 1050 ℃, and the calcination time is 5 hours, so that the target product is obtained.
Example 2:
according to the chemical formula CaTi3O7:0.015Mn4+Weighing CaCO3 (A.R.)0.985mol、TiO2 3mol、Eu2O3(99.99%)0.0075 mol; then 0.6wt% of sorbitan trioleate is weighed according to the total mass of the medicaments; preparation of precipitant NH4HCO3The concentration of the solution is 1 mol/L; weighing Eu2O3Dissolving with appropriate amount of nitric acid, adding appropriate amount of deionized water, heating to 45 deg.C, and performing water bath treatment; adding into the above solutionCaCO3、TiO2Stirring the sorbitan trioleate simultaneously, dropwise adding a precipitator, adjusting the pH to be =8, and continuously stirring for 2 hours; directly drying to obtain a fluffy precursor; and (3) calcining the precursor in an air atmosphere furnace at 1300 ℃ for 3 hours to obtain the target product.
Example 3
According to the chemical formula CaTi3O7:0.02Mn4+Weighing CaCO3 (A.R.)0.98mol、TiO2 3mol、Eu2O3(99.99%)0.01 mol; then 0.6wt% of sorbitan trioleate is weighed according to the total mass of the medicaments; preparation of precipitant NH4HCO3The concentration of the solution is 1 mol/L; weighing Eu2O3Dissolving with appropriate amount of nitric acid, adding appropriate amount of deionized water, heating to 55 deg.C, and performing water bath treatment; adding CaCO to the above solution3、TiO2Stirring the sorbitan trioleate simultaneously, dropwise adding a precipitator, adjusting the pH to be =8, and continuously stirring for 2 hours; directly drying to obtain a fluffy precursor; and (3) putting the precursor into an air atmosphere furnace for calcination, wherein the calcination temperature is 1100 ℃, and the calcination time is 4 hours, so as to obtain the target product.
Example 4
According to the chemical formula CaTi3O7:0.05Mn4+Weighing CaCO3 (A.R.)0.95mol、TiO2 3mol、Eu2O3(99.99%)0.025 mol; then 1wt% of sorbitan trioleate is weighed according to the total mass of the medicaments; preparation of precipitant NH4HCO3The concentration of the solution is 1 mol/L; weighing Eu2O3Dissolving with appropriate amount of nitric acid, adding appropriate amount of deionized water, heating to 60 deg.C, and performing water bath treatment; adding CaCO to the above solution3、TiO2Stirring the sorbitan trioleate simultaneously, dropwise adding a precipitator, adjusting the pH to be =8, and continuously stirring for 2 hours; directly drying to obtain a fluffy precursor; and (3) putting the precursor into an air atmosphere furnace for calcination, wherein the calcination temperature is 1150 ℃, and the calcination time is 5 hours, so that the target product is obtained.
Example 5
According to the chemical formula CaTi3O7:0.08Mn4+Weighing CaCO3 (A.R.)0.92mol、TiO2 3mol、Eu2O3(99.99%)0.04 mol; then 0.8wt% of sorbitan trioleate is weighed according to the total mass of the medicaments; preparation of precipitant NH4HCO3The concentration of the solution is 1 mol/L; weighing Eu2O3Dissolving with appropriate amount of nitric acid, adding appropriate amount of deionized water, heating to 65 deg.C, and performing water bath treatment; adding CaCO to the above solution3、TiO2Stirring the sorbitan trioleate simultaneously, dropwise adding a precipitator, adjusting the pH to be =8, and continuously stirring for 2 hours; directly drying to obtain a fluffy precursor; and (3) putting the precursor into an air atmosphere furnace for calcination, wherein the calcination temperature is 1200 ℃, and the calcination time is 6 hours, so that the target product is obtained.
Example 6
According to the chemical formula CaTi3O7:0.1Mn4+Weighing CaCO3 (A.R.)0.92mol、TiO2 3mol、Eu2O3(99.99%)0.05 mol; then 0.6wt% of sorbitan trioleate is weighed according to the total mass of the medicaments; preparation of precipitant NH4HCO3The concentration of the solution is 1 mol/L; weighing Eu2O3Dissolving with appropriate amount of nitric acid, adding appropriate amount of deionized water, heating to 75 deg.C, and performing water bath treatment; adding CaCO to the above solution3、TiO2Stirring the sorbitan trioleate simultaneously, dropwise adding a precipitator, adjusting the pH to be =8, and continuously stirring for 2 hours; directly drying to obtain a fluffy precursor; and (3) putting the precursor into an air atmosphere furnace for calcination, wherein the calcination temperature is 1250 ℃, and the calcination time is 6.5 hours, and the target product is obtained.
The product prepared by the invention has uniform granularity, and the average grain diameter is 10-80 mu m; the product prepared by the invention has high luminous efficiency and stable luminescence, and the peak value of an emission spectrum is positioned near 612nm under the excitation of near ultraviolet light; the fluorescent powder prepared by the invention has a very wide excitation spectrum, the peak value of the emission spectrum is positioned near 612nm under the excitation of near ultraviolet light, the luminous intensity is high, and the fluorescent powder is suitable for the red fluorescent powder excited by a near ultraviolet LED; the fluorescent powder prepared by the invention is obtained by calcining at a lower temperature, the generation and doping of the matrix can be completed by one-time calcining, the time is short, the energy is saved, the raw materials are cheap and easy to obtain, the process is simple, and the industrial production is easy to realize.
The above embodiments are only for illustrating the preferred embodiments of the present invention, but the present invention is not limited to the above embodiments, and any modifications, equivalent substitutions and improvements made within the spirit and principle of the present invention within the knowledge of those skilled in the art should be considered as the protection scope of the present application.
Claims (4)
1. A preparation method of red light fluorescent powder is characterized by comprising the following steps: the chemical expression of the red fluorescent powder is as follows
CaTi 307 :xEu3+Wherein x is more than or equal to 0.01 and less than or equal to 0.1, and the method comprises the following specific steps:
(1) respectively weighing calcium salt, titanium oxide and europium oxide according to the stoichiometric ratio of each element in the chemical formula, and respectively weighing sorbitan trioleate accounting for 0.2-1 wt% of the total mass of the raw materials;
(2) preparing a precipitant solution with the concentration of 1-3 mol/L;
(3) dissolving the weighed europium oxide with a proper amount of concentrated acid, adding a proper amount of deionized water, and heating to 35-80 ℃ for water bath treatment;
(4) adding the weighed calcium salt, titanium oxide and sorbitan trioleate into the solution prepared in the step (3), stirring simultaneously, dropwise adding a precipitator until the pH value of the solution is more than or equal to 7, and continuously stirring for 1-4 hours until the reaction is fully carried out;
(5) directly drying the solution obtained in the step (4) to obtain a fluffy precursor;
(6) placing the precursor in an air atmosphere furnace for calcination at the temperature of 1000-1300 ℃ for 2-7 hours to obtain a target product;
the target product obtained in the step (6) has uniform granularity, and the average grain diameter is 10-80 μm; the target product obtained in the step (6) has high luminous efficiency and stable luminescence, and the emission spectrum peak is positioned near 612nm under the excitation of near ultraviolet light.
2. The method for preparing a red-light phosphor according to claim 1, wherein: characterized in that the calcium salt in the step (1) is Ca (NO)3) 3 · 4H 3 O、CaCl3Or CaCO3One kind of (1).
3. The method for preparing a red-light phosphor according to claim 1, wherein: the precipitator in the step (2) is NH3HCO3 。
4. The method for preparing a red-light phosphor according to claim 1, wherein: in the step (3), the concentrated acid is analytically pure nitric acid or hydrochloric acid.
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0993865A2 (en) * | 1998-10-09 | 2000-04-19 | Basf Aktiengesellschaft | Basic catalyst based on titanates, zirconates and hafnates |
| CN101775287A (en) * | 2009-11-13 | 2010-07-14 | 东华大学 | CaTiO3:Eu<3+> fluorescent powder and preparation method thereof |
| CN104861969A (en) * | 2015-05-20 | 2015-08-26 | 中国科学院新疆理化技术研究所 | Aluminum calcium titanate solid-solution type red phosphor and preparation method thereof |
| CN107641510A (en) * | 2017-11-13 | 2018-01-30 | 河北紫旭节能环保技术咨询有限公司 | A kind of red fluorescence powder and preparation method thereof |
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Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0993865A2 (en) * | 1998-10-09 | 2000-04-19 | Basf Aktiengesellschaft | Basic catalyst based on titanates, zirconates and hafnates |
| CN101775287A (en) * | 2009-11-13 | 2010-07-14 | 东华大学 | CaTiO3:Eu<3+> fluorescent powder and preparation method thereof |
| CN104861969A (en) * | 2015-05-20 | 2015-08-26 | 中国科学院新疆理化技术研究所 | Aluminum calcium titanate solid-solution type red phosphor and preparation method thereof |
| CN107641510A (en) * | 2017-11-13 | 2018-01-30 | 河北紫旭节能环保技术咨询有限公司 | A kind of red fluorescence powder and preparation method thereof |
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