CN118005065A - Preparation method of rare earth samarium oxide prismatic particles - Google Patents
Preparation method of rare earth samarium oxide prismatic particles Download PDFInfo
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- CN118005065A CN118005065A CN202410173079.1A CN202410173079A CN118005065A CN 118005065 A CN118005065 A CN 118005065A CN 202410173079 A CN202410173079 A CN 202410173079A CN 118005065 A CN118005065 A CN 118005065A
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- samarium oxide
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- 229910001954 samarium oxide Inorganic materials 0.000 title claims abstract description 76
- 229940075630 samarium oxide Drugs 0.000 title claims abstract description 76
- 239000002245 particle Substances 0.000 title claims abstract description 59
- -1 rare earth samarium oxide Chemical class 0.000 title claims abstract description 37
- 229910052761 rare earth metal Inorganic materials 0.000 title claims abstract description 33
- 238000002360 preparation method Methods 0.000 title claims abstract description 23
- 238000000034 method Methods 0.000 claims abstract description 28
- 239000002244 precipitate Substances 0.000 claims abstract description 27
- 229910052772 Samarium Inorganic materials 0.000 claims abstract description 18
- KZUNJOHGWZRPMI-UHFFFAOYSA-N samarium atom Chemical compound [Sm] KZUNJOHGWZRPMI-UHFFFAOYSA-N 0.000 claims abstract description 18
- 238000001027 hydrothermal synthesis Methods 0.000 claims abstract description 15
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Chemical compound O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 13
- 239000008367 deionised water Substances 0.000 claims abstract description 12
- 229910021641 deionized water Inorganic materials 0.000 claims abstract description 12
- 239000004094 surface-active agent Substances 0.000 claims abstract description 11
- 238000006243 chemical reaction Methods 0.000 claims abstract description 10
- 238000000926 separation method Methods 0.000 claims abstract description 7
- 230000035484 reaction time Effects 0.000 claims abstract description 5
- 239000012716 precipitator Substances 0.000 claims abstract description 4
- 239000011259 mixed solution Substances 0.000 claims description 21
- 229920000036 polyvinylpyrrolidone Polymers 0.000 claims description 14
- 235000013855 polyvinylpyrrolidone Nutrition 0.000 claims description 14
- 239000001267 polyvinylpyrrolidone Substances 0.000 claims description 14
- 238000001035 drying Methods 0.000 claims description 9
- 238000003756 stirring Methods 0.000 claims description 9
- 238000005406 washing Methods 0.000 claims description 9
- POILWHVDKZOXJZ-ARJAWSKDSA-M (z)-4-oxopent-2-en-2-olate Chemical compound C\C([O-])=C\C(C)=O POILWHVDKZOXJZ-ARJAWSKDSA-M 0.000 claims description 8
- MSMNVXKYCPHLLN-UHFFFAOYSA-N azane;oxalic acid;hydrate Chemical group N.N.O.OC(=O)C(O)=O MSMNVXKYCPHLLN-UHFFFAOYSA-N 0.000 claims description 8
- 229920001343 polytetrafluoroethylene Polymers 0.000 claims description 5
- 239000004810 polytetrafluoroethylene Substances 0.000 claims description 5
- FKTOIHSPIPYAPE-UHFFFAOYSA-N samarium(iii) oxide Chemical compound [O-2].[O-2].[O-2].[Sm+3].[Sm+3] FKTOIHSPIPYAPE-UHFFFAOYSA-N 0.000 abstract description 46
- 239000000843 powder Substances 0.000 abstract description 27
- 239000000047 product Substances 0.000 abstract description 23
- 239000000463 material Substances 0.000 abstract description 5
- 230000002776 aggregation Effects 0.000 abstract description 4
- 239000003446 ligand Substances 0.000 abstract description 4
- 239000000203 mixture Substances 0.000 abstract description 4
- 239000002994 raw material Substances 0.000 abstract description 4
- 238000004220 aggregation Methods 0.000 abstract description 3
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 abstract description 3
- 239000001301 oxygen Substances 0.000 abstract description 3
- 229910052760 oxygen Inorganic materials 0.000 abstract description 3
- 238000006555 catalytic reaction Methods 0.000 abstract description 2
- 230000031700 light absorption Effects 0.000 abstract description 2
- 150000002910 rare earth metals Chemical class 0.000 abstract description 2
- 239000000376 reactant Substances 0.000 abstract description 2
- 238000003860 storage Methods 0.000 abstract description 2
- 238000001878 scanning electron micrograph Methods 0.000 description 12
- 239000000243 solution Substances 0.000 description 8
- 238000002441 X-ray diffraction Methods 0.000 description 6
- ATRRKUHOCOJYRX-UHFFFAOYSA-N Ammonium bicarbonate Chemical compound [NH4+].OC([O-])=O ATRRKUHOCOJYRX-UHFFFAOYSA-N 0.000 description 4
- 229910000013 Ammonium bicarbonate Inorganic materials 0.000 description 4
- 235000012538 ammonium bicarbonate Nutrition 0.000 description 4
- 239000001099 ammonium carbonate Substances 0.000 description 4
- BHXBZLPMVFUQBQ-UHFFFAOYSA-K samarium(iii) chloride Chemical compound Cl[Sm](Cl)Cl BHXBZLPMVFUQBQ-UHFFFAOYSA-K 0.000 description 4
- MUBZPKHOEPUJKR-UHFFFAOYSA-N Oxalic acid Chemical compound OC(=O)C(O)=O MUBZPKHOEPUJKR-UHFFFAOYSA-N 0.000 description 3
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 description 3
- 238000001354 calcination Methods 0.000 description 3
- 238000001816 cooling Methods 0.000 description 3
- VHUUQVKOLVNVRT-UHFFFAOYSA-N Ammonium hydroxide Chemical compound [NH4+].[OH-] VHUUQVKOLVNVRT-UHFFFAOYSA-N 0.000 description 2
- MHAJPDPJQMAIIY-UHFFFAOYSA-N Hydrogen peroxide Chemical compound OO MHAJPDPJQMAIIY-UHFFFAOYSA-N 0.000 description 2
- YRKCREAYFQTBPV-UHFFFAOYSA-N acetylacetone Chemical compound CC(=O)CC(C)=O YRKCREAYFQTBPV-UHFFFAOYSA-N 0.000 description 2
- 235000011114 ammonium hydroxide Nutrition 0.000 description 2
- 239000007864 aqueous solution Substances 0.000 description 2
- 239000006185 dispersion Substances 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 2
- 230000003287 optical effect Effects 0.000 description 2
- 239000007787 solid Substances 0.000 description 2
- 239000012798 spherical particle Substances 0.000 description 2
- 239000002202 Polyethylene glycol Substances 0.000 description 1
- PRQMIVBGRIUJHV-UHFFFAOYSA-N [N].[Fe].[Sm] Chemical compound [N].[Fe].[Sm] PRQMIVBGRIUJHV-UHFFFAOYSA-N 0.000 description 1
- 239000000654 additive Substances 0.000 description 1
- 230000000996 additive effect Effects 0.000 description 1
- 238000005054 agglomeration Methods 0.000 description 1
- 230000032683 aging Effects 0.000 description 1
- 238000003483 aging Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 235000014121 butter Nutrition 0.000 description 1
- 239000003054 catalyst Substances 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- KPLQYGBQNPPQGA-UHFFFAOYSA-N cobalt samarium Chemical compound [Co].[Sm] KPLQYGBQNPPQGA-UHFFFAOYSA-N 0.000 description 1
- 238000005049 combustion synthesis Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 239000000499 gel Substances 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- 238000009775 high-speed stirring Methods 0.000 description 1
- 230000007062 hydrolysis Effects 0.000 description 1
- 238000006460 hydrolysis reaction Methods 0.000 description 1
- 238000011031 large-scale manufacturing process Methods 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 239000004530 micro-emulsion Substances 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 235000006408 oxalic acid Nutrition 0.000 description 1
- FVBPMHBPHVSJRB-UHFFFAOYSA-N oxalic acid;samarium Chemical compound [Sm].OC(=O)C(O)=O FVBPMHBPHVSJRB-UHFFFAOYSA-N 0.000 description 1
- 229920001223 polyethylene glycol Polymers 0.000 description 1
- 238000001556 precipitation Methods 0.000 description 1
- 230000001737 promoting effect Effects 0.000 description 1
- 229910001404 rare earth metal oxide Inorganic materials 0.000 description 1
- 229910000938 samarium–cobalt magnet Inorganic materials 0.000 description 1
- 238000005118 spray pyrolysis Methods 0.000 description 1
- 239000011232 storage material Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 239000000725 suspension Substances 0.000 description 1
Landscapes
- Compounds Of Alkaline-Earth Elements, Aluminum Or Rare-Earth Metals (AREA)
Abstract
The invention discloses a preparation method of rare earth samarium oxide prismatic particles, which comprises the following specific processes: the samarium-containing complex, the precipitator and the surfactant are dissolved in deionized water and stirred uniformly, then the mixture undergoes a high-temperature high-pressure hydrothermal reaction to generate a white precipitate, and the white precipitate is washed, dried and roasted sequentially after centrifugal separation to obtain rare earth samarium oxide prismatic particles. The invention adopts a ligand exchange method, takes samarium-containing complex as raw material, carries out high-temperature high-pressure hydrothermal reaction with precipitant and surfactant, controls the process of preparing precipitate by hydrothermal reaction, avoids aggregation of products due to mass generation in a short time, combines and adjusts the concentration, reaction time and reaction temperature of reactant raw material, precipitant and surfactant, effectively controls the morphology, size and dispersibility of samarium oxide particles, obtains prismatic samarium oxide powder with relatively small particle size and better dispersibility, and has wide application prospect in the fields of ultraviolet light absorption, catalysis, oxygen storage, rare earth permanent magnet materials and the like.
Description
Technical Field
The invention belongs to the technical field of material preparation, and particularly relates to a preparation method of rare earth samarium oxide prismatic particles.
Background
Samarium oxide (Sm 2O3) is used as classical rare earth oxide, and the powder is light yellow and is commonly used for preparing metal samarium, samarium cobalt and samarium-iron-nitrogen permanent magnet materials. The samarium element with variable valence can be used as active catalyst and oxygen storage material. In addition, samarium oxide has excellent optical properties of absorbing ultraviolet rays and transmitting visible rays, and is also used as an additive in specialty glass and optical materials. In view of the wide range of applications in the above fields, a number of processes have been used to prepare samarium oxide powders, such as: precipitation, hydrolysis, hydrothermal, sol-gel, microemulsion, spray pyrolysis, combustion synthesis, sonochemistry, and the like.
Patent CN114671450A discloses a preparation method of samarium oxide spherical particles, which comprises the steps of firstly, at 50-70 ℃, dropwise adding a samarium chloride solution and an ammonium bicarbonate solution into a reactor containing a base solution in parallel, stirring and reacting to obtain a reaction suspension, then, carrying out solid-liquid separation to obtain a first solid, and roasting the first solid to obtain the samarium oxide spherical particles, wherein the size of the spherical samarium oxide particles is larger, and the range of the spherical samarium oxide particles is 40-65 mu m. Patent CN103086416a discloses a method for preparing ellipsoidal samarium oxide particles, firstly preparing ammonium bicarbonate solution by using ammonium bicarbonate, ammonia water and deionized water, then adding samarium chloride solution into the solution to prepare mixed solution of samarium chloride, ammonium bicarbonate and ammonia water, then adding hydrogen peroxide into the mixed solution to generate a precipitate of samarium carbonate peroxide, ageing, filtering, washing and roasting to obtain ellipsoidal samarium oxide particles, wherein the particle size is still larger, and the range is 30-55 μm. Patent CN113636584A discloses a preparation method of high-purity high-specific surface rare earth samarium oxide, which comprises the steps of adding prepared samarium chloride solution, butter and polyethylene glycol into a closed reaction kettle respectively, stirring for 15 minutes, and standing for half an hour; then adding sodium hydroxide, heating to 80 ℃, starting high-speed stirring, heating, preserving heat for 12 hours at 170-190 ℃, and cleaning and roasting to obtain samarium oxide particles with the particle size of about 20nm, wherein the particles are adhered and have slightly poor dispersibility. From the above, it is known how to prepare samarium oxide powder having relatively small particle size and good dispersibility, which is a difficulty in the samarium oxide preparation process.
Disclosure of Invention
The technical problem to be solved by the invention is to provide a preparation method of rare earth samarium oxide prismatic particles aiming at the defects of the prior art. The method adopts a ligand exchange method to prepare the samarium oxide through hydrothermal reaction, effectively controls the process of preparing the precipitate through the hydrothermal reaction, avoids the aggregation of products due to mass generation in a short time, effectively controls the morphology, the size and the dispersibility of the samarium oxide particles, obtains the prismatic samarium oxide powder with relatively smaller particle size and better dispersibility, and solves the problem that the particle size, the morphology and the dispersibility are not easy to control in the preparation process of the samarium oxide powder.
In order to solve the technical problems, the invention adopts the following technical scheme: the preparation method of the rare earth samarium oxide prismatic particles is characterized by comprising the following specific processes: dissolving samarium-containing complex, precipitator and surfactant in deionized water, placing on a magnetic stirrer for stirring uniformly to obtain a mixed solution, transferring the mixed solution into a polytetrafluoroethylene reaction kettle for high-temperature high-pressure hydrothermal reaction to generate a white precipitate, and washing, drying and roasting the white precipitate in sequence after centrifugal separation to obtain rare earth samarium oxide prismatic particles.
The preparation method of the rare earth samarium oxide prismatic particles is characterized in that the samarium-containing complex is samarium acetylacetonate, and the concentration of the samarium acetylacetonate in the mixed solution is 0.015 mol/L-0.045 mol/L.
The preparation method of the rare earth samarium oxide prismatic particles is characterized in that the precipitant is ammonium oxalate monohydrate, and the concentration of the ammonium oxalate monohydrate in the mixed solution is 0.15-0.45 mol/L.
The preparation method of the rare earth samarium oxide prismatic particles is characterized in that the surfactant is polyvinylpyrrolidone with an average molecular weight of not less than 5000, and the concentration of polyvinylpyrrolidone in the mixed solution is 13 g/L-26 g/L. The invention preferably adopts polyvinylpyrrolidone as a surfactant, and utilizes the characteristic of good solubility in aqueous solution to ensure that polyvinylpyrrolidone is easy to attach on the generated white precipitate particles, thereby improving the dispersibility of the product particles and avoiding agglomeration; meanwhile, the higher the molecular weight of polyvinylpyrrolidone, the higher the viscosity, the stronger the cohesiveness, the more favorable the dispersion of product particles and the formation of prismatic morphology, but the higher the molecular weight, the higher the price, so by controlling the average molecular weight of polyvinylpyrrolidone to be not less than 5000, the dispersion promoting performance and economy are taken into account, more preferably, the polyvinylpyrrolidone with the average molecular weight of 24000 is selected.
The preparation method of the rare earth samarium oxide prismatic particles is characterized in that the stirring time is 0.5-1.0 h.
The preparation method of the rare earth samarium oxide prismatic particles is characterized in that the temperature of the high-temperature high-pressure hydrothermal reaction is 100-120 ℃ and the reaction time is 6-24 hours.
In the research process of the invention, the influence of the factors on the morphology, the size and the dispersibility of the product samarium oxide particles is researched by adopting a variable control method and changing the concentration of the samarium-containing complex and the precipitant, the addition amount of the surfactant, the reaction temperature and the reaction time, so that the preferable variable range is optimized and obtained.
The preparation method of the rare earth samarium oxide prismatic particles is characterized in that the washing mode is that deionized water is adopted for washing 3-5 times.
The preparation method of the rare earth samarium oxide prismatic particles is characterized in that the drying temperature is 60-100 ℃ and the drying time is 12-24 hours.
The preparation method of the rare earth samarium oxide prismatic particles is characterized in that the roasting temperature is 800-950 ℃ and the roasting time is 2-4 hours.
The preparation method of the rare earth samarium oxide prismatic particles is characterized in that the sizes of the rare earth samarium oxide prismatic particles are as follows: the length is 3-10 μm, the width is 3-10 μm, and the height is 1-4 μm. The rare earth samarium oxide prismatic particles prepared by the method have smaller size and higher structural strength, and are beneficial to application and popularization.
Compared with the prior art, the invention has the following advantages:
1. The invention adopts a ligand exchange method to prepare samarium oxide through hydrothermal reaction, uses samarium-containing complex samarium acetylacetonate as a raw material, uses ammonium oxalate monohydrate as a precipitator, uses oxalic acid to replace acetylacetone to realize ligand replacement, and generates samarium oxalic acid complex which is insoluble in water to precipitate and separate out, thereby effectively controlling the process of preparing the precipitate through hydrothermal reaction, avoiding the aggregation of products generated in a large amount in a short time, effectively controlling the morphology, the size and the dispersity of samarium oxide particles, obtaining prismatic samarium oxide powder with relatively small particle size and better dispersity, and being applicable to the fields of ultraviolet light absorption, catalysis, oxygen storage, rare earth permanent magnet materials and the like.
2. In the high-temperature high-pressure hydrothermal reaction process, the shape, the size and the dispersity of the samarium oxide particles are further controlled by adjusting the concentration, the reaction time and the reaction temperature of reactant raw materials, the precipitant and the surfactant, so that the product prismatic samarium oxide powder is ensured to have relatively smaller particle size and better dispersity.
3. In the preparation process of the invention, polyvinylpyrrolidone is used as a surfactant, and the characteristic of good solubility in aqueous solution is utilized to enable the polyvinylpyrrolidone to be easily attached to the generated white precipitate particles, so that the dispersibility of the product particles is improved, and the good dispersibility of the prismatic samarium oxide powder is further ensured.
4. The preparation process has the advantages of simple operation flow, strong operability and high stability, and can be used for large-scale production.
The technical scheme of the invention is further described in detail through the drawings and the embodiments.
Drawings
FIG. 1 is an SEM image of a white precipitated product prepared according to example 1 of the present invention.
FIG. 2 is an SEM image of a prismatic samarium oxide powder prepared according to example 1 of the invention.
FIG. 3 is an XRD pattern of the prismatic samarium oxide powder prepared in example 1 of the present invention.
Fig. 4 is an SEM image of a white precipitated product prepared in example 2 of the present invention.
Fig. 5 is an SEM image of the prismatic samarium oxide powder prepared in example 2 of the present invention.
FIG. 6 is an XRD pattern of the prismatic samarium oxide powder prepared in example 2 according to the present invention.
Fig. 7 is an SEM image of a white precipitated product prepared in example 3 of the present invention.
FIG. 8 is an SEM image of a prismatic samarium oxide powder prepared according to example 3 of the invention.
Fig. 9 is an XRD pattern of the prismatic samarium oxide powder prepared in example 3 of the present invention.
Detailed Description
Example 1
The specific process of the embodiment is as follows: dissolving 0.5g of samarium acetylacetonate and 1.6g of ammonium oxalate monohydrate and 1.0g of polyvinylpyrrolidone with average molecular weight of 24000 in 75mL of deionized water, placing the mixture on a magnetic stirrer, stirring uniformly for 0.5h to obtain a mixed solution, transferring the mixed solution into a polytetrafluoroethylene reaction kettle, placing the mixed solution into a muffle furnace, performing high-temperature high-pressure hydrothermal reaction at 100 ℃ for 24h to generate a white precipitate, washing the white precipitate with deionized water for 3 times sequentially after centrifugal separation, placing the white precipitate in an oven, drying at 60 ℃ for 12h, placing the dried white precipitate in the muffle furnace, roasting at 800 ℃ for 2h, and cooling to obtain prismatic samarium oxide powder with the length of 3-10 μm, the width of 3-10 μm and the height of 1-4 μm.
Fig. 1 is an SEM image of a white precipitated product prepared in this example, and as can be seen from fig. 1, the morphology of the white precipitated product is prismatic, and the dispersibility is good.
Fig. 2 is an SEM image of the prismatic samarium oxide powder prepared in this example, and as can be seen from fig. 2, the particle morphology of the samarium oxide powder is prismatic, similar to the morphology of the white precipitate product before roasting, and has better dispersibility.
FIG. 3 is an XRD pattern of the prismatic samarium oxide powder prepared in this example, and it can be judged from FIG. 3 that the product obtained after calcination is samarium oxide.
Example 2
The specific process of the embodiment is as follows: dissolving 0.75g of samarium acetylacetonate and 2.42g of ammonium oxalate monohydrate, 1.0g of polyvinylpyrrolidone with average molecular weight of 24000 in 75mL of deionized water, placing the mixture on a magnetic stirrer, stirring uniformly for 0.8h to obtain a mixed solution, transferring the mixed solution into a polytetrafluoroethylene reaction kettle, placing the mixed solution into a muffle furnace, performing high-temperature high-pressure hydrothermal reaction at 100 ℃ for 6h to generate a white precipitate, washing the white precipitate with deionized water for 3 times sequentially after centrifugal separation, placing the white precipitate in an oven, drying for 12h at 80 ℃, placing the dried white precipitate in the muffle furnace, roasting for 3h at 850 ℃, and cooling to obtain prismatic samarium oxide powder.
Fig. 4 is an SEM image of the white precipitated product prepared in this example, and as can be seen from fig. 4, the particle morphology of the white precipitated product is prismatic, and the dispersibility is good.
Fig. 5 is an SEM image of the prismatic samarium oxide powder prepared in this example, and as can be seen from fig. 5, the particle morphology of the samarium oxide powder is prismatic, similar to the morphology of the white precipitate product before roasting, and has better dispersibility.
Fig. 6 is an XRD pattern of the prismatic samarium oxide powder prepared in this example, and it can be judged from fig. 6 that the product obtained after calcination is samarium oxide.
Example 3
The specific process of the embodiment is as follows: dissolving 1.5g of samarium acetylacetonate and 4.84g of ammonium oxalate monohydrate, 2.0g of polyvinylpyrrolidone with average molecular weight of 24000 in 75mL of deionized water, placing the mixture on a magnetic stirrer, stirring uniformly for 1.0h to obtain a mixed solution, transferring the mixed solution into a polytetrafluoroethylene reaction kettle, placing the mixed solution into a muffle furnace, performing high-temperature high-pressure hydrothermal reaction at 120 ℃ for 24h to generate a white precipitate, washing the white precipitate with deionized water for 5 times sequentially after centrifugal separation, placing the white precipitate in an oven, drying for 24h at 100 ℃, placing the dried white precipitate in the muffle furnace, roasting for 4h at 950 ℃, and cooling to obtain prismatic samarium oxide powder.
Fig. 7 is an SEM image of the white precipitated product prepared in this example, and as can be seen from fig. 7, the particle morphology of the white precipitated product is prismatic, and the dispersibility is good.
Fig. 8 is an SEM image of the prismatic samarium oxide powder prepared in this example, and as can be seen from fig. 8, the particle morphology of the samarium oxide powder is prismatic, similar to the morphology of the white precipitate product before roasting, and has better dispersibility.
Fig. 9 is an XRD pattern of the prismatic samarium oxide powder prepared in this example, and it can be judged from fig. 9 that the product obtained after calcination is samarium oxide.
The above description is only of the preferred embodiments of the present invention, and is not intended to limit the present invention. Any simple modification, variation and equivalent variation of the above embodiments according to the technical substance of the invention still fall within the scope of the technical solution of the invention.
Claims (10)
1. The preparation method of the rare earth samarium oxide prismatic particles is characterized by comprising the following specific processes: dissolving samarium-containing complex, precipitator and surfactant in deionized water, placing on a magnetic stirrer for stirring uniformly to obtain a mixed solution, transferring the mixed solution into a polytetrafluoroethylene reaction kettle for high-temperature high-pressure hydrothermal reaction to generate a white precipitate, and washing, drying and roasting the white precipitate in sequence after centrifugal separation to obtain rare earth samarium oxide prismatic particles.
2. The method for preparing the rare earth samarium oxide prismatic particles according to claim 1, wherein the samarium-containing complex is samarium acetylacetonate, and the concentration of the samarium acetylacetonate in the mixed solution is 0.015mol/L to 0.045mol/L.
3. The method for preparing the rare earth samarium oxide prismatic particles according to claim 1, wherein the precipitant is ammonium oxalate monohydrate, and the concentration of the ammonium oxalate monohydrate in the mixed solution is 0.15mol/L to 0.45mol/L.
4. The method for preparing the rare earth samarium oxide prismatic particles according to claim 1, wherein the surfactant is polyvinylpyrrolidone having an average molecular weight of not less than 5000, and the concentration of polyvinylpyrrolidone in the mixed solution is 13g/L to 26g/L.
5. The method for preparing the rare earth samarium oxide prismatic particles according to claim 1, wherein the stirring time is 0.5 h-1.0 h.
6. The method for preparing the rare earth samarium oxide prismatic particles according to claim 1, wherein the high-temperature high-pressure hydrothermal reaction temperature is 100-120 ℃ and the reaction time is 6-24 hours.
7. The method for preparing the rare earth samarium oxide prismatic particles according to claim 1, wherein the washing mode is to wash 3-5 times with deionized water.
8. The method for preparing the rare earth samarium oxide prismatic particles according to claim 1, wherein the drying temperature is 60-100 ℃ and the drying time is 12-24 hours.
9. The method for preparing the rare earth samarium oxide prismatic particles according to claim 1, wherein the roasting temperature is 800-950 ℃ and the roasting time is 2-4 hours.
10. The method of claim 1, wherein the dimensions of the rare earth samarium oxide prismatic particles are: the length is 3-10 μm, the width is 3-10 μm, and the height is 1-4 μm.
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