CN112094639A - High-performance light-storage mosquito killer lamp fluorescent powder and preparation method thereof - Google Patents
High-performance light-storage mosquito killer lamp fluorescent powder and preparation method thereof Download PDFInfo
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- KRKNYBCHXYNGOX-UHFFFAOYSA-N citric acid Chemical compound OC(=O)CC(O)(C(O)=O)CC(O)=O KRKNYBCHXYNGOX-UHFFFAOYSA-N 0.000 claims description 15
- 238000000227 grinding Methods 0.000 claims description 15
- 239000007888 film coating Substances 0.000 claims description 14
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- GWEVSGVZZGPLCZ-UHFFFAOYSA-N titanium dioxide Inorganic materials O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 claims description 14
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- 230000002147 killing effect Effects 0.000 claims description 9
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- JHJLBTNAGRQEKS-UHFFFAOYSA-M sodium bromide Chemical compound [Na+].[Br-] JHJLBTNAGRQEKS-UHFFFAOYSA-M 0.000 claims description 6
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims description 5
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 claims description 5
- FPCJKVGGYOAWIZ-UHFFFAOYSA-N butan-1-ol;titanium Chemical compound [Ti].CCCCO.CCCCO.CCCCO.CCCCO FPCJKVGGYOAWIZ-UHFFFAOYSA-N 0.000 claims description 5
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- RSEIMSPAXMNYFJ-UHFFFAOYSA-N europium(III) oxide Inorganic materials O=[Eu]O[Eu]=O RSEIMSPAXMNYFJ-UHFFFAOYSA-N 0.000 claims description 5
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- 238000004506 ultrasonic cleaning Methods 0.000 claims description 5
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- 229910001845 yogo sapphire Inorganic materials 0.000 claims description 5
- OGIDPMRJRNCKJF-UHFFFAOYSA-N titanium oxide Inorganic materials [Ti]=O OGIDPMRJRNCKJF-UHFFFAOYSA-N 0.000 claims description 4
- 229910052757 nitrogen Inorganic materials 0.000 claims description 3
- HSFWRNGVRCDJHI-UHFFFAOYSA-N alpha-acetylene Natural products C#C HSFWRNGVRCDJHI-UHFFFAOYSA-N 0.000 claims description 2
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- 229910052739 hydrogen Inorganic materials 0.000 claims description 2
- 125000004435 hydrogen atom Chemical class [H]* 0.000 claims description 2
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 claims 2
- 150000002500 ions Chemical class 0.000 abstract description 7
- 238000010521 absorption reaction Methods 0.000 abstract description 6
- 150000004645 aluminates Chemical class 0.000 abstract description 6
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- 238000004020 luminiscence type Methods 0.000 description 3
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- BPQQTUXANYXVAA-UHFFFAOYSA-N Orthosilicate Chemical compound [O-][Si]([O-])([O-])[O-] BPQQTUXANYXVAA-UHFFFAOYSA-N 0.000 description 2
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- AZDRQVAHHNSJOQ-UHFFFAOYSA-N alumane Chemical class [AlH3] AZDRQVAHHNSJOQ-UHFFFAOYSA-N 0.000 description 1
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- 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
- C09K11/7783—Luminescent, e.g. electroluminescent, chemiluminescent materials containing inorganic luminescent materials containing rare earth metals containing two or more rare earth metals one of which being europium
- C09K11/7792—Aluminates
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Abstract
The invention relates to a high-performance light-storage mosquito-killing lamp fluorescent powder and a preparation method thereof, wherein the fluorescent powder has a chemical formula as follows: (Ba)x，M1‑2x)Al10O17：aEu2+，bMn2+，cR3+Wherein M is one of Li, Na, K or Cs, R is one of Ce, Pr, Sm, Gd, Bi, Dy, Tm or Yb, x is more than or equal to 0.2 and less than or equal to 0.45, a is more than or equal to 0.5 and less than or equal to 3, b is more than or equal to 0.1 and less than 0.5, and c is more than 0 and less than 0.06, pH is controlled to ensure that nitric acid aqueous solution is dissolved and ammonia gas is introduced to obtain crystalline precipitate, precursor powder is improved by microwave treatment and synthesized under high-temperature ignition, and TiO is coated on the surface by a sol-gel coating method2Coating with aEu2+，bMn2+，cR3+Co-doping activated alkaline earth aluminate system to make up the problem of insufficient absorption of excitation energy of luminescence center, high-temperature burning and sol-gel TiO by precipitation method2The film is coated, the impurity phase is less, the doping efficiency, the uniformity and the product purity of the active ions are improved, the method is suitable for industrial production, and the high-brightness long-afterglow stable light-storing fluorescent powder meets the requirements of extinctionThe mosquito lamp is required to be used.
Description
Technical Field
The invention relates to high-performance light-storage mosquito killer lamp fluorescent powder and a preparation method thereof, belonging to the technical field of fluorescent powder.
Background
The mosquito killing lamp is a simple and practical mechanical device for trapping mosquitoes by a negative pressure device or killing mosquitoes by a high-voltage grid after releasing light beam chemical substances according to the strong phototaxis and heat tendency habits of the mosquitoes, wherein fluorescent powder is an indispensable material in a light tube of an ultraviolet mosquito killing lamp. The fluorescent powder as solid luminous substance is mainly ionic crystal, and forms proper luminous center by means of a certain activator, when it is irradiated by natural light or artificial visible light, it can absorb energy from outside, and release fluorescence in the form of energy radiation, and after it is luminous, it can be returned to ground state by means of relaxation action center to wait for next excitation.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provides high-performance light-storage mosquito killer lamp fluorescent powder and a preparation method thereof, wherein aEu is adopted2+，bMn2+，cR3+Codoping activated alkaline earth aluminate system, high temperature burning and sol-gel TiO by precipitation method2The stable light-storing fluorescent powder with the advantages of film coating, high brightness and long afterglow meets the use requirements of the mosquito killer lamp.
The invention is realized by the following technical scheme:
a high-performance light-storage mosquito-killing lamp fluorescent powder has a chemical formula as follows: (Ba)x，M1-2x)Al10O17：aEu2+，bMn2+，cR3+Wherein M is one of Li, Na, K or Cs, R is one of Ce, Pr, Sm, Gd, Bi, Dy, Tm or Yb, x is more than or equal to 0.2 and less than or equal to 0.45, a is more than or equal to 0.5 and less than 3, b is more than or equal to 0.1 and less than 0.5, and c is more than 0 and less than 0.06.
The preparation method of the high-performance light-storage mosquito killer lamp fluorescent powder comprises the following steps:
s1: according to formula (Ba)x，M1-2x)Al10O17：aEu2+，bMn2+，cR3+Wherein M is one of Li, Na, K or Cs, R is one of Ce, Pr, Sm, Gd, Bi, Dy, Tm or Yb, and the raw material BaCO is weighed according to the proportion of one of the computational chemical components3,M2CO3,Al2O3,Eu2O3、R2O3Respectively placing the materials in a mortar for grinding;
s2: dissolving the raw material obtained in the step S1 in a nitric acid aqueous solution, keeping the pH of the solution after adding the nitric acid aqueous solution at 3-4, introducing ammonia gas for precipitation, introducing ammonia gas until the pH of the solution is 8 or more, keeping the solution for 10-20min, filtering to obtain a filter cake, drying, and performing microwave treatment to obtain precursor powder, wherein the microwave power is 50-120Ghz, and the microwave treatment procedure is to continuously treat the precursor powder for 10-15min at 2-5S microwave intervals every 4-8S;
s3: placing the precursor powder in a tubular furnace, adding a fluxing agent into the tubular furnace, wherein the fluxing agent is one or more of NaBr, KI, BaCl, NHCl, LiCl and LiCO, the addition amount of the fluxing agent accounts for 0.1-10% of the mass of the precursor powder, performing high-temperature firing in a reducing atmosphere, the reducing atmosphere is one or more of nitrogen, hydrogen, ammonia, methane and acetylene, the firing temperature is 1000-1300 ℃, the firing time is 2-8h, and taking out the material after the furnace temperature is cooled to room temperature for further crushing and grinding;
s4: ultrasonic cleaning the material treated by S3 with deionized water or ethanol, vacuum filtering, grinding and drying or further TiO2Film-coating treatment to obtain the invented mosquito-killing lamp fluorescent powder TiO2The film coating treatment comprises the following specific steps: mixing butyl titanate and ethanol, dissolving in nitric acid water solution, dripping citric acid solution under strong stirring till the dripping is complete, continuing stirring for 20-30min to obtain gel, vacuum drying to obtain gel powder, roasting with ground and dried fluorescent powder in reducing atmosphere at the roasting temperature of 600-800 ℃, for 1-2h, cooling, taking out to obtain surface TiO2Film coated fluorescent powder for mosquito killing lamp.
The invention has the beneficial effects that:
(1) an alkaline earth aluminate system which is co-doped and activated by aEu2+, bMn2+ and cR3+ can be effectively excited by long-wave ultraviolet and blue-violet light, cation charge compensation forms a stable matrix crystal structure and is easy to move and dope on a mirror layer, the conversion requirement of photon energy is met to the maximum extent, energy is transferred from a matrix lattice to a main activator Eu2+ ion, and Eu is prevented from being caused by reverse energy transfer2+Change in ionic valence state, energyThe quantity is transferred from the sensitizer to the secondary activator, the problem of insufficient absorption of excitation energy of a luminescence center is solved, and the luminescent material has the characteristics of long light storage afterglow time, high luminescence intensity and stable chemical performance;
(2) controlling pH to dissolve a nitric acid aqueous solution and introducing ammonia gas to obtain a crystalline precipitate, treating and improving precursor powder by microwave, reducing the melting temperature of a substance under high-temperature ignition to assist regular crystal growth, reducing the reaction period of production energy consumption, having few impurity phases, and improving the doping efficiency, uniformity and product purity of active ions, thereby improving the lumen efficiency of the fluorescent powder and being suitable for industrial production;
(3) surface TiO is obtained by adopting a sol-gel film coating method2The coated mosquito-killing lamp fluorescent powder has stable temperature characteristics under the long-term use of the purple light tube of the mosquito-killing lamp, particularly has the effect of resisting aluminate deliquescence, reduces the brightness and color coordinate attenuation under the influence of the temperature characteristics, ensures the mosquito-killing effect and the service life under the long-term use, and meets the use requirements of the mosquito-killing lamp.
Detailed Description
The following examples further illustrate embodiments of the present invention.
Example 1:
a preparation method of high-performance light-storage mosquito-killing lamp fluorescent powder comprises the following steps:
s1: according to formula (Ba)x，M1-2x)Al10O17：aEu2+，bMn2+，cR3+Wherein, M is Li, R is Gd, x is 0.3, a is 1, b is 0.4, c is 0.03, and the raw material BaCO is weighed according to the proportion of the calculated chemical components3,M2CO3,Al2O3,Eu2O3、R2O3Respectively placing the materials in a mortar for grinding;
s2: dissolving the raw material obtained in the step S1 in a nitric acid aqueous solution, keeping the pH of the solution after adding the nitric acid aqueous solution at 3.5, introducing ammonia gas for precipitation, introducing ammonia gas until the pH of the solution is 8.5, keeping the solution for 10-20min, filtering to obtain a filter cake, drying, and performing microwave treatment to obtain precursor powder, wherein the microwave power is 100Ghz, and the microwave treatment procedure is to perform continuous treatment for 12min at every 6S of microwave intervals of 3S;
s3: placing the precursor powder in a tubular furnace, adding a fluxing agent into the tubular furnace, wherein the fluxing agent is LiCO, the addition amount of the fluxing agent accounts for 2% of the mass of the precursor powder, performing high-temperature firing in a reducing atmosphere, the reducing atmosphere is nitrogen, the firing temperature is 1050 ℃, the firing time is 6 hours, and taking out the material after the furnace temperature is cooled to room temperature for further crushing and grinding;
s4: ultrasonic cleaning the material treated by S3 with deionized water or ethanol, vacuum filtering, grinding and drying or further TiO2Film-coating treatment to obtain the invented mosquito-killing lamp fluorescent powder TiO2The film coating treatment comprises the following specific steps: mixing butyl titanate and ethanol, dissolving in nitric acid water solution, dripping citric acid solution under strong stirring till the dripping is complete, continuing stirring for 25min to obtain gel, vacuum drying to obtain gel powder, roasting with ground and dried fluorescent powder in reducing atmosphere at 700 deg.C for 1.5h, cooling, and taking out to obtain surface TiO2Film coated fluorescent powder for mosquito killing lamp.
Example 2:
a preparation method of high-performance light-storage mosquito-killing lamp fluorescent powder comprises the following steps:
s1: according to formula (Ba)x，M1-2x)Al10O17：aEu2+，bMn2+，cR3+Wherein M is Na, R is Dy, x is 0.4, a is 2.1, b is 0.25, c is 0.02, and the raw material BaCO is weighed according to the proportion of the computational chemical components3,M2CO3,Al2O3,Eu2O3、R2O3Respectively placing the materials in a mortar for grinding;
s2: dissolving the raw material obtained in the step S1 in a nitric acid aqueous solution, keeping the pH of the solution after adding the nitric acid aqueous solution at 4, introducing ammonia gas for precipitation, introducing ammonia gas until the pH of the solution is 8.5, keeping the solution for 18min, filtering to obtain a filter cake, drying, and performing microwave treatment to obtain precursor powder, wherein the microwave power is 60Ghz, and the microwave treatment procedure is to perform continuous treatment for 13min at every 5S microwave interval of 4S;
s3: placing the precursor powder in a tubular furnace, adding a fluxing agent into the tubular furnace, wherein the fluxing agent is NaBr, the addition amount of the fluxing agent accounts for 3% of the mass of the precursor powder, performing high-temperature firing in a reducing atmosphere, the reducing atmosphere is ammonia gas, the firing temperature is 1100 ℃, the firing time is 4 hours, and taking out the material after the furnace temperature is cooled to room temperature for further crushing and grinding;
s4: ultrasonic cleaning the material treated by S3 with deionized water or ethanol, vacuum filtering, grinding and drying or further TiO2Film-coating treatment to obtain the invented mosquito-killing lamp fluorescent powder TiO2The film coating treatment comprises the following specific steps: mixing butyl titanate and ethanol, dissolving in nitric acid water solution, dripping citric acid solution under strong stirring till the dripping is complete, continuing stirring for 22min to obtain gel, vacuum drying to obtain gel powder, roasting with ground and dried fluorescent powder in reducing atmosphere at 680 deg.C for 1h, cooling, and taking out to obtain surface TiO2Film coated fluorescent powder for mosquito killing lamp.
Example 3:
a preparation method of high-performance light-storage mosquito-killing lamp fluorescent powder comprises the following steps:
s1: according to formula (Ba)x，M1-2x)Al10O17：aEu2+，bMn2+，cR3+Wherein M is Cs, R is Yb, x is 0.32, a is 1.4, b is 0.42, c is 0.05, and the raw material BaCO is weighed according to the proportion of the computational chemical components3,M2CO3,Al2O3,Eu2O3、R2O3Respectively placing the materials in a mortar for grinding;
s2: dissolving the raw material obtained in the step S1 in a nitric acid aqueous solution, keeping the pH of the solution after adding the nitric acid aqueous solution at 3, introducing ammonia gas for precipitation, introducing ammonia gas until the pH of the solution is 8.5, keeping the solution for 12min, filtering to obtain a filter cake, drying, and performing microwave treatment to obtain precursor powder, wherein the microwave power is 110Ghz, and the microwave treatment procedure is to perform continuous treatment for 14min at every 5S microwave interval of 5S;
s3: putting precursor powder into a tubular furnace, adding a fluxing agent into the tubular furnace, wherein the fluxing agent consists of NHCl and LiCl according to the mass ratio of 1:1, the addition amount of the fluxing agent accounts for 6% of the mass of the precursor powder, performing high-temperature firing in a reducing atmosphere, wherein the reducing atmosphere is methane, the firing temperature is 1250 ℃, the firing time is 7 hours, and taking out the material for further crushing and grinding after the furnace temperature is cooled to room temperature;
s4: ultrasonic cleaning the material treated by S3 with deionized water or ethanol, vacuum filtering, grinding and drying or further TiO2Film-coating treatment to obtain the invented mosquito-killing lamp fluorescent powder TiO2The film coating treatment comprises the following specific steps: mixing butyl titanate and ethanol, dissolving in nitric acid water solution, dripping citric acid solution under strong stirring till the dripping is complete, continuing stirring for 30min to obtain gel, vacuum drying to obtain gel powder, roasting with ground and dried fluorescent powder in reducing atmosphere at 750 deg.C for 1.5h, cooling, and taking out to obtain surface TiO2Film coated fluorescent powder for mosquito killing lamp.
The working mechanism of the invention is as follows:
using aEu2+，bMn2+，cR3+The co-doped activated alkaline earth aluminate system can be effectively excited by long-wave ultraviolet and blue-violet light and Eu is absorbed by matrix crystal lattice2+4f-5d electron transition in the ion, the generated energy is transferred from the host crystal lattice to the main activator Eu2+Ion transfer, effective shielding by outer s and p orbits, linear spectrum of f-f transition, high luminous color purity, and high Mn content2+Does not absorb ultraviolet radiation, and R3+Absorbing ultraviolet radiation, and exciting energy from R under irradiation of ultraviolet light or blue-violet light3Transfer to Mn2+R is one of Ce, Pr, Sm, Gd, Bi, Dy, Tm or Yb, energy is transferred from the sensitizer to the secondary activator, so that Eu caused by reverse energy transfer is avoided2+The ionic valence state changes, so that the problem of insufficient absorption of excitation energy of a luminescence center is solved, the luminescence brightness is improved, and the afterglow time is prolonged;
the preparation method is characterized in that the pH of a solution obtained by adding a nitric acid aqueous solution into raw materials is 3-4, ammonia gas is introduced for precipitation, the ammonia gas is introduced until the pH of the solution is 8, cations are precipitated, agglomeration is reduced, crystalline precipitates are obtained, the dispersibility of powder is better, a sensitizer and an activator are uniformly distributed, energy transfer is reliable, the synthesis temperature and the fineness of fluorescent powder are reduced, the phenomenon that the peak width is too large due to the fact that the particle size is too large and the particle size is dispersed is avoided, precursor powder is continuously treated and improved by a microwave interval program, the deterioration degree is small, the sensitizer and the activator act with a fluxing agent, the melting temperature of substances is reduced during high-temperature ignition to assist regular crystal growth, the reaction period of production energy consumption is reduced, impurity phases are few, and the doping efficiency, uniformity and the product purity of activated ions are;
reducing agglomeration by ball milling, and obtaining surface TiO by adopting a sol-gel film coating method2The film-coated mosquito killer lamp fluorescent powder has the advantages that the component proportion of the dry gel powder and the fluorescent powder raw material is easy to control, the molecular level is uniform, the activity of the dry gel powder is high, the film coating temperature is easy to reduce, the film coating uniformity is ensured, the temperature characteristic is stable under the long-term use of the mosquito killer lamp ultraviolet light tube, particularly the aluminum salt deliquescence effect is resisted, the brightness and the color coordinate attenuation under the influence of the temperature characteristic are reduced, and the mosquito killing effect and the service life under the long-term use are ensured;
testing and analyzing: and (3) carrying out X-ray diffraction analysis on the synthesized sample by a TD-3000 XRD analyzer, wherein the tube pressure is 30KV tube flow: 20mA, examples 1-3 (Ba)x，M1-2x)Al10O17：aEu2+，bMn2+，cR3+The excitation spectrum is a broadband spectrum with the peak wavelength of 450-550nm, and the emission peaks are positioned at about 460nm, 485nm and 505 nm;
(Bax，M1-2x)Al10O17wherein M is one of Li, Na, K or Cs, monovalent M and divalent Ba cations satisfy charge balance through ion replacement, morphology analysis is carried out by adopting a scanning electron microscope, and Al10O17Comprises a loose non-close-packed crystal form, a spinel cell block polyhedral connecting structure forms a large gap and a stable matrix crystal structure formed by cation charge compensation, so that cations are easy to move and dope in a mirror layer, the silicate crystal structure has the characteristics of long light storage afterglow time, high luminous intensity and stable chemical performance, the field intensity of the silicate crystal is corrected by the cations in the mirror layer, the energy transfer efficiency is higher, and the energy transfer efficiency is more than or equal to 0.2x≤0.45，Bax，M1-2xThe ratio increases with the increase of x, the diffraction peak shifts to the high angle direction, the crystal field is enhanced, and Al is improved10O17Crystallization, reduction of impure phases and improvement of stability;
the co-doped absorption and excitation broad spectrum is matched with an alkaline earth aluminate system, the conversion requirement of photon energy is met to the maximum extent, fluorescence is released in the form of energy radiation, the fluorescence returns to the ground state through a relaxation effect center after luminescence to wait for the next excitation, a is more than or equal to 0.5 and less than 3, b is more than or equal to 0.1 and less than 0.5, c is more than 0 and less than 0.06, the concentration of luminescent particles is improved, the advantages of strong absorption capacity and high conversion efficiency are achieved, the quantity and the absorption energy of electrons stored in the energy level are improved, the light attenuation under the intense bombardment of electrons and ions generated by long-term irradiation and inert gas discharge is reduced, the afterglow time is prolonged, an afterglow luminance measuring instrument is used for measurement, a D65 light source is used, the surface illumination of a sample is 10000x, the afterglow luminance is measured every 52-0.5mcd/m2The afterglow time is 120-.
The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the present invention are also included in the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.
Claims (9)
1. A high-performance light-storage mosquito-killing lamp fluorescent powder is characterized in that the fluorescent powder has a chemical formula: (Ba)x，M1-2x)Al10O17：aEu2+，bMn2+，cR3+Wherein M is one of Li, Na, K or Cs, and R is one of Ce, Pr, Sm, Gd, Bi, Dy, Tm or Yb.
2. The phosphor for a high performance light-storing mosquito killer lamp as claimed in claim 1, wherein x is 0.2. ltoreq. x.ltoreq.0.45.
3. The phosphor for a high performance light-storing mosquito killer lamp as claimed in claim 1, wherein a is 0.5. ltoreq. a < 3, b is 0.1. ltoreq. b < 0.5, c is 0 < 0.06.
4. The preparation method of the high-performance light-storing mosquito killer lamp fluorescent powder according to any one of claims 1 to 3, characterized in that the preparation method comprises the following steps:
s1: according to formula (Ba)x，M1-2x)Al10O17：aEu2+，bMn2+，cR3+Wherein M is one of Li, Na, K or Cs, R is one of Ce, Pr, Sm, Gd, Bi, Dy, Tm or Yb, and the raw material BaCO is weighed according to the proportion of one of the computational chemical components3,M2CO3,Al2O3,Eu2O3、R2O3Respectively placing the materials in a mortar for grinding;
s2: dissolving the raw material obtained in the step S1 in a nitric acid aqueous solution, introducing ammonia gas for precipitation, filtering to obtain a filter cake, drying, and performing microwave treatment to obtain precursor powder;
s3: placing the precursor powder in a tubular furnace, carrying out high-temperature firing in a reducing atmosphere, and taking out the material after the furnace temperature is cooled to room temperature for further crushing and grinding;
s4: ultrasonic cleaning the material treated by S3 with deionized water or ethanol, vacuum filtering, grinding and drying or further TiO2And (5) performing film covering treatment to obtain the fluorescent powder of the mosquito killer lamp.
5. The method of claim 4, wherein the pH of the solution after adding the aqueous solution of nitric acid in step S2 is 3-4, and ammonia gas is introduced until the pH of the solution is 8 or more and kept for 10-20 min.
6. The method as claimed in claim 4, wherein the microwave power in step S2 is 50-120Ghz, and the microwave treatment process is continuous treatment for 10-15min at 2-5S intervals every 4-8S of microwave.
7. The method for preparing high-performance light-accumulating mosquito killer lamp fluorescent powder according to claim 4, characterized in that a fluxing agent is further added into the step S3 tube furnace, wherein the fluxing agent is one or more of NaBr, KI, BaCl, NHCl, LiCl and LiCO, and the addition amount of the fluxing agent accounts for 0.1-10% of the mass of the precursor powder.
8. The method as claimed in claim 4, wherein the reducing atmosphere in step S3 is one or more selected from nitrogen, hydrogen, ammonia, methane and acetylene, the burning temperature is 1000-.
9. The method for preparing a high performance fluorescent powder for a light-storing mosquito killer lamp as claimed in claim 4, wherein TiO 4 step2The film coating treatment comprises the following specific steps: mixing butyl titanate and ethanol, dissolving in nitric acid water solution, dripping citric acid solution under strong stirring till the dripping is complete, continuing stirring for 20-30min to obtain gel, vacuum drying to obtain gel powder, roasting with ground and dried fluorescent powder in reducing atmosphere at the roasting temperature of 600-800 ℃, for 1-2h, cooling, taking out to obtain surface TiO2Film coated fluorescent powder for mosquito killing lamp.
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