WO2024088057A1 - 一种氧化钒稀土双掺杂铁氧体磁性复合薄膜浆料制备工艺及镀膜方法 - Google Patents

一种氧化钒稀土双掺杂铁氧体磁性复合薄膜浆料制备工艺及镀膜方法 Download PDF

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WO2024088057A1
WO2024088057A1 PCT/CN2023/123736 CN2023123736W WO2024088057A1 WO 2024088057 A1 WO2024088057 A1 WO 2024088057A1 CN 2023123736 W CN2023123736 W CN 2023123736W WO 2024088057 A1 WO2024088057 A1 WO 2024088057A1
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rare earth
sol
vanadium oxide
ferrite
doped
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French (fr)
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彭显著
滕艾均
张东彬
尹翔鹭
代宇
刘天豪
曾泽华
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鞍钢集团北京研究院有限公司
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D7/00—Processes, other than flocking, specially adapted for applying liquids or other fluent materials to particular surfaces or for applying particular liquids or other fluent materials
    • B05D7/24—Processes, other than flocking, specially adapted for applying liquids or other fluent materials to particular surfaces or for applying particular liquids or other fluent materials for applying particular liquids or other fluent materials
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D1/00—Processes for applying liquids or other fluent materials
    • B05D1/18—Processes for applying liquids or other fluent materials performed by dipping
    • C—CHEMISTRY; METALLURGY
    • C01—INORGANIC CHEMISTRY
    • C01F—COMPOUNDS OF THE METALS BERYLLIUM, MAGNESIUM, ALUMINIUM, CALCIUM, STRONTIUM, BARIUM, RADIUM, THORIUM, OR OF THE RARE-EARTH METALS
    • C01F17/00—Compounds of rare earth metals
    • C01F17/10—Preparation or treatment, e.g. separation or purification
    • C—CHEMISTRY; METALLURGY
    • C01—INORGANIC CHEMISTRY
    • C01F—COMPOUNDS OF THE METALS BERYLLIUM, MAGNESIUM, ALUMINIUM, CALCIUM, STRONTIUM, BARIUM, RADIUM, THORIUM, OR OF THE RARE-EARTH METALS
    • C01F17/00—Compounds of rare earth metals
    • C01F17/20—Compounds containing only rare earth metals as the metal element
    • C01F17/206—Compounds containing only rare earth metals as the metal element oxide or hydroxide being the only anion
    • C—CHEMISTRY; METALLURGY
    • C01—INORGANIC CHEMISTRY
    • C01F—COMPOUNDS OF THE METALS BERYLLIUM, MAGNESIUM, ALUMINIUM, CALCIUM, STRONTIUM, BARIUM, RADIUM, THORIUM, OR OF THE RARE-EARTH METALS
    • C01F17/00—Compounds of rare earth metals
    • C01F17/20—Compounds containing only rare earth metals as the metal element
    • C01F17/206—Compounds containing only rare earth metals as the metal element oxide or hydroxide being the only anion
    • C01F17/224—Oxides or hydroxides of lanthanides
    • C—CHEMISTRY; METALLURGY
    • C01—INORGANIC CHEMISTRY
    • C01F—COMPOUNDS OF THE METALS BERYLLIUM, MAGNESIUM, ALUMINIUM, CALCIUM, STRONTIUM, BARIUM, RADIUM, THORIUM, OR OF THE RARE-EARTH METALS
    • C01F17/00—Compounds of rare earth metals
    • C01F17/20—Compounds containing only rare earth metals as the metal element
    • C01F17/206—Compounds containing only rare earth metals as the metal element oxide or hydroxide being the only anion
    • C01F17/224—Oxides or hydroxides of lanthanides
    • C01F17/235—Cerium oxides or hydroxides
    • C—CHEMISTRY; METALLURGY
    • C01—INORGANIC CHEMISTRY
    • C01G—COMPOUNDS CONTAINING METALS NOT COVERED BY SUBCLASSES C01D OR C01F
    • C01G25/00—Compounds of zirconium
    • C01G25/02—Oxides
    • C—CHEMISTRY; METALLURGY
    • C01—INORGANIC CHEMISTRY
    • C01G—COMPOUNDS CONTAINING METALS NOT COVERED BY SUBCLASSES C01D OR C01F
    • C01G31/00—Compounds of vanadium
    • C01G31/02—Oxides
    • C—CHEMISTRY; METALLURGY
    • C01—INORGANIC CHEMISTRY
    • C01G—COMPOUNDS CONTAINING METALS NOT COVERED BY SUBCLASSES C01D OR C01F
    • C01G49/00—Compounds of iron
    • C01G49/02—Oxides; Hydroxides
    • C—CHEMISTRY; METALLURGY
    • C01—INORGANIC CHEMISTRY
    • C01P—INDEXING SCHEME RELATING TO STRUCTURAL AND PHYSICAL ASPECTS OF SOLID INORGANIC COMPOUNDS
    • C01P2002/00—Crystal-structural characteristics
    • C01P2002/70—Crystal-structural characteristics defined by measured X-ray, neutron or electron diffraction data
    • C01P2002/72—Crystal-structural characteristics defined by measured X-ray, neutron or electron diffraction data by d-values or two theta-values, e.g. as X-ray diagram
    • C—CHEMISTRY; METALLURGY
    • C01—INORGANIC CHEMISTRY
    • C01P—INDEXING SCHEME RELATING TO STRUCTURAL AND PHYSICAL ASPECTS OF SOLID INORGANIC COMPOUNDS
    • C01P2004/00—Particle morphology
    • C01P2004/80—Particles consisting of a mixture of two or more inorganic phases
    • C01P2004/82—Particles consisting of a mixture of two or more inorganic phases two phases having the same anion, e.g. both oxidic phases
    • C—CHEMISTRY; METALLURGY
    • C01—INORGANIC CHEMISTRY
    • C01P—INDEXING SCHEME RELATING TO STRUCTURAL AND PHYSICAL ASPECTS OF SOLID INORGANIC COMPOUNDS
    • C01P2006/00—Physical properties of inorganic compounds
    • C01P2006/42—Magnetic properties

Definitions

  • the invention belongs to the field of vanadium-based functional materials, and specifically relates to the preparation of ferrite magnetic composite materials using vanadium oxide as a thermal expansion regulating additive and a forming technology thereof.
  • Ferromagnetic metal oxide materials mainly include permanent ferrite materials and soft ferrite materials, and are one of the most widely used magnetic materials.
  • Iron oxide powder is the main raw material for preparing ferromagnetic metal oxide materials, and is mainly derived from the steel manufacturing industry and the chemical industry.
  • Permanent ferrite materials are strong magnetic materials with strong anti-demagnetization ability and high residual magnetic induction intensity, which are made of ferric oxide as the main raw material and manufactured by ceramic process methods. Permanent ferrite materials are divided into sintered permanent ferrite materials and bonded permanent ferrite materials, among which sintered permanent ferrite materials are divided into dry-pressed permanent ferrite materials and wet-pressed permanent ferrite materials.
  • Ferrite soft magnetic materials are a kind of ferrite materials that are easy to magnetize and demagnetize in a weak magnetic field. Ferrite soft magnetic materials are divided into manganese-zinc ferrite materials, nickel-zinc ferrite materials, magnesium-zinc ferrite materials and lithium-zinc ferrite materials.
  • rare earth Due to its unique 4f electron layer structure, rare earth can form uniaxial magnetic anisotropy in some crystal structures combined with 3d element compounds, and has very excellent extraordinary magnetic properties.
  • nylon iron boron has the highest magnetic energy product, and samarium cobalt permanent magnets have high operating temperature and low temperature coefficient.
  • nanocrystalline two-phase exchange-coupled rare earth permanent magnet materials have the advantages of good high temperature resistance and high magnetic energy product.
  • This two-phase coupled rare earth permanent magnet material is obtained by exchange coupling of high magnetocrystalline anisotropy rare earth permanent magnet materials and high saturation magnetization intensity soft magnetic materials at the nanoscale. Its theoretical maximum magnetic energy product far exceeds that of nepheline iron boron, and has a magnetostriction coefficient several dozen times higher than that of iron, cobalt and nickel.
  • Rare earth oxide doped ferrite can greatly optimize the performance of ferrite and meet the application needs of high-end industrial production products, especially in magnetic thin film materials with extremely high application prospects.
  • Magnetic film materials refer to thin, strong magnetic (ferromagnetic and ferrimagnetic) materials, referred to as magnetic film materials.
  • the most commonly used coating methods in industry are mainly the Czochralski coating method and the screen printing coating method. These two methods have a shorter process and lower cost and are highly practical.
  • problems such as the difficulty in matching the thermal expansion coefficients of the film material and the substrate, the magnetic film detaching from the substrate during use, resulting in material inactivation, and the uneven distribution of the material causing cracks and gaps in the magnetic film material.
  • the purpose of the present invention is to provide a vanadium oxide rare earth dual doped ferrite magnetic composite film slurry preparation process and coating method.
  • adding an appropriate amount of vanadium oxide material to the magnetic film material can, to a certain extent, adjust the thermal expansion coefficient matching of the magnetic film material and the metal matrix material, solve the problems of the magnetic film material being separated from the matrix and causing the material to be inactivated during use, and the uneven distribution of the material causing cracks and gaps in the magnetic film material, and at the same time improve the performance of the magnetic film material.
  • a vanadium oxide rare earth dual doped ferrite magnetic composite thin film slurry preparation process and coating method comprises the following steps:
  • rare earth oxide sol process dissolve rare earth nitrate in water to form a saturated solution, add a dispersant and a complexing agent, stir to make it dispersed evenly, place in an oil bath or a water bath and stir until a sol is generated to obtain a rare earth oxide sol;
  • ferrite sol process dissolve ferric nitrate in water to form a saturated solution, add a dispersant and a complexing agent, stir to make it dispersed evenly, place in an oil bath or a water bath and stir until a sol is generated to obtain a ferrite sol;
  • rare earth ferrite sol gel process the rare earth oxide sol obtained in step S1.1 and the ferrite sol obtained in step S1.2 are mixed and stirred, and 1 mol ⁇ L -1 ammonia water is added to adjust the pH to 7.5 until a rare earth ferrite sol gel is formed;
  • step S1.4 vanadium-doped sol-gel slurry process: after the rare earth ferrite sol-gel obtained in step S1.3 is stirred evenly, it is placed in a constant temperature oscillation box and oscillated at 80-90°C for 10-12 hours, then taken out from the constant temperature oscillation box, vanadium oxide precursor is added and stirred evenly, and then it is placed in a constant temperature oscillation box and continued to oscillate until a composite gel is formed, thereby obtaining a vanadium-doped sol-gel slurry, i.e., vanadium oxide rare earth dual-doped ferrite magnetic composite film slurry;
  • the coating method of the vanadium oxide rare earth dual-doped ferrite magnetic composite thin film slurry obtained in step S1.4 includes a screen printing method and a pulling method, and the operation steps are as follows:
  • step S2.1.1 placing the vanadium oxide rare earth dual-doped ferrite magnetic composite film slurry obtained in step S1.4 on the surface of a screen printer, placing a metal substrate on the bottom of the screen printer, and performing printing and coating, the mass ratio of the screen printing slurry to the substrate is 1:1, the number of printings is 3, and the printing immersion time is 10 to 15 minutes;
  • step S2.1.2 placing the coated substrate obtained in step S2.1.1 into a muffle furnace, performing constant temperature thermal diffusion at 80-120°C, and then calcining into a film, with a heating rate of 5-10°C/min, a calcination temperature of 700-750°C, and a calcination time of 2-3h, and then annealing at an annealing rate of 10-15°C/min to 300-400°C, keeping the temperature for 2-3h, and finally cooling naturally in air;
  • step S2.2.1 vertically suspend the substrate on a pulling machine, and use the vanadium oxide rare earth dual-doped ferrite magnetic composite thin film slurry in step S1.4 to pull and coat the film, the mass ratio of the slurry to the substrate is 1:3, the pulling times are 5 times, and the pulling immersion time is 30 to 40 minutes;
  • S2.2.2.2 Place the coated substrate obtained in S2.2.1 into a muffle furnace and perform constant temperature thermal diffusion at 70-100°C. Then calcine it into a film at a heating rate of 5-10°C/min, a calcination temperature of 600-650°C, and a calcination time of 2-3h. Then anneal it at a rate of 10-15°C/min, anneal it to 200-300°C, keep it warm for 2-3h, and finally cool it naturally in air.
  • the rare earth nitrates include cerium nitrate, samarium nitrate, yttrium nitrate, zirconium nitrate and lanthanum nitrate;
  • the complexing agent is citric acid monohydrate, the amount of substance n 1 rare earth metal ion/n 2 citric acid monohydrate is 10-11:1, and the amount of substance n 3 Fe 3+ /n 4 citric acid monohydrate is 10-11:1;
  • the dispersant includes propylene glycol and ethylene glycol, and the mass m 1 citric acid monohydrate/m 2 dispersant is 7-8:1.
  • the temperature of the oil bath pot and the water bath pot is 80-100° C., and the stirring rate is 70-100 r/min.
  • the added amounts of the rare earth oxide sol and the ferrite sol are calculated according to the molar ratio of rare earth element to iron element of 1-1.2:0.8-1.
  • the vanadium oxide precursor comprises vanadyl sulfate, and the mass ratio of the rare earth oxide sol to the vanadium oxide precursor is 0-1:5-6.
  • the present invention has the following beneficial effects:
  • the present invention uses the addition of composite rare earth to greatly improve the performance of the magnetic material
  • the present invention optimizes two traditional coating processes, screen printing and pulling coating, and the obtained film layer has excellent performance
  • a vanadium oxide precursor is used to adjust the matching of the thermal expansion coefficients of the film material and the substrate to avoid problems such as the magnetic film detaching from the substrate and causing material inactivation, and uneven distribution of the material causing cracks and gaps in the magnetic film material.
  • FIG. 1 is an XRD diagram of a yttrium zirconium rare earth oxide film.
  • FIG. 2 is an XRD diagram of a samarium cerium rare earth oxide film.
  • a vanadium oxide rare earth dual-doped ferrite magnetic composite thin film slurry preparation process and coating method are disclosed.
  • the following implementation cases are used to illustrate the specific implementation methods and implementation effects of the present invention.
  • a vanadium oxide rare earth dual doped ferrite magnetic composite film slurry preparation process and coating method is carried out according to the following steps:
  • rare earth oxide sol process yttrium nitrate and zirconium nitrate are dissolved in water to form a saturated solution, complexing agent citric acid monohydrate is added according to the amount of substance n 1 rare earth metal ion (yttrium ion + zirconium ion)/n 2 citric acid monohydrate 10.5:1, dispersant propylene glycol is added according to the mass m 1 citric acid monohydrate/m 2 propylene glycol 7.2:1, stirred (70r/min) to make it dispersed evenly, and then placed in an 80°C oil bath and stirred (70r/min) until sol is generated to obtain rare earth oxide sol;
  • ferrite sol process dissolve ferric nitrate in water to form a saturated solution, add complexing agent citric acid monohydrate according to the amount of substance n 3 Fe 3+ /n 4 citric acid monohydrate 10.5:1, add dispersant propylene glycol according to the mass m 1 citric acid monohydrate/m 2 propylene glycol 7.2:1, stir (70r/min) to make it dispersed evenly, then place in an 80°C oil bath and stir (70r/min) until sol is generated to obtain ferrite sol;
  • rare earth ferrite sol gel process the rare earth oxide sol obtained in step S1.1 and the ferrite sol obtained in step S1.2 are mixed and stirred (70r/min) in a molar ratio of rare earth element to iron element of 1:1, and 1 mol L -1 ammonia water is added to adjust the pH to 7.5 until a rare earth ferrite sol gel is formed;
  • step S1.4 vanadium-doped sol-gel slurry process: after the rare earth ferrite sol-gel obtained in step S1.3 is stirred (70r/min) evenly, it is placed in a constant temperature oscillation box and oscillated at 80-90°C for 10-12h, then taken out from the constant temperature oscillation box and added with vanadyl sulfate, the mass ratio of rare earth oxide sol and vanadyl sulfate is 1:5, after stirring (70r/min) evenly, it is placed in a constant temperature oscillation box and continues to oscillate until a composite gel is formed, to obtain vanadium-doped sol-gel slurry, i.e., vanadium oxide rare earth dual-doped ferrite magnetic composite film slurry;
  • step S2.1.1 placing the vanadium oxide rare earth dual-doped ferrite magnetic composite film slurry obtained in step S1.4 on the surface of a screen printer, placing a metal substrate on the bottom of the screen printer, and performing printing and coating, the mass ratio of the screen printing slurry to the substrate is 1:1, the number of printings is 3, and the printing immersion time is 10 minutes;
  • step S2.1.2 place the coated substrate obtained in step S2.1.1 into a muffle furnace, perform constant temperature thermal diffusion at 80°C, and then calcine into a film at a heating rate of 5°C/min, calcination temperature of 700°C, calcination time of 2h, and then anneal at an annealing rate of 10°C/min, anneal to 300°C, keep warm for 2h, and finally cool naturally in air.
  • a vanadium oxide rare earth dual doped ferrite magnetic composite thin film slurry preparation process and coating method is carried out according to the following steps:
  • rare earth oxide sol process yttrium nitrate and zirconium nitrate are dissolved in water to form a saturated solution, complexing agent citric acid monohydrate is added according to the amount of substance n 1 rare earth metal ion (yttrium ion + zirconium ion)/n 2 citric acid monohydrate 10.5:1, dispersant propylene glycol is added according to the mass m 1 citric acid monohydrate/m 2 propylene glycol 7.2:1, stirred (70r/min) to make it dispersed evenly, and then placed in an 80°C oil bath and stirred (70r/min) until sol is generated to obtain rare earth oxide sol;
  • ferrite sol process dissolve ferric nitrate in water to form a saturated solution, add complexing agent citric acid monohydrate according to the amount of substance n 3 Fe 3+ /n 4 citric acid monohydrate 10.5:1, add dispersant propylene glycol according to the mass m 1 citric acid monohydrate/m 2 propylene glycol 7.2:1, stir (70r/min) to make it dispersed evenly, then place in an 80°C oil bath and stir (70r/min) until sol is generated to obtain ferrite sol;
  • rare earth ferrite sol gel process the rare earth oxide sol obtained in step S1.1 and the ferrite sol obtained in step S1.2 are mixed and stirred (70r/min) in a molar ratio of rare earth element to iron element of 1:1, and 1 mol L -1 ammonia water is added to adjust the pH to 7.5 until a rare earth ferrite sol gel is formed;
  • step S1.4 vanadium-doped sol-gel slurry process: after the rare earth ferrite sol-gel obtained in step S1.3 is stirred (70r/min) evenly, it is placed in a constant temperature oscillation box and oscillated at 80-90°C for 10-12h, then taken out from the constant temperature oscillation box and added with vanadyl sulfate, the mass ratio of rare earth oxide sol and vanadyl sulfate is 1:5, after stirring (70r/min) evenly, it is placed in a constant temperature oscillation box and continues to oscillate until a composite gel is formed, to obtain vanadium-doped sol-gel slurry, i.e., vanadium oxide rare earth dual-doped ferrite magnetic composite film slurry;
  • step S2.2.1 vertically suspend the substrate on a pulling machine, and use the vanadium oxide rare earth dual-doped ferrite magnetic composite thin film slurry in step S1.4 to pull and coat the film, the mass ratio of the slurry to the substrate is 1:3, the number of pulling is 5 times, and the pulling and immersion time is 30 minutes;
  • a vanadium oxide rare earth dual doped ferrite magnetic composite thin film slurry preparation process and coating method is carried out according to the following steps:
  • rare earth oxide sol process dissolve cerium nitrate and samarium nitrate in water to form a saturated solution, add complexing agent citric acid monohydrate according to the amount of substance n 1 rare earth metal ion (cerium ion + samarium ion)/n 2 citric acid monohydrate 10.5:1, add dispersant propylene glycol according to the mass m 1 citric acid monohydrate/m 2 propylene glycol 7.2:1, stir (70r/min) to make it dispersed evenly, then place in an 80°C oil bath and stir (70r/min) until sol is generated to obtain rare earth oxide sol;
  • ferrite sol process dissolve ferric nitrate in water to form a saturated solution, add complexing agent citric acid monohydrate according to the amount of substance n 3 Fe 3+ /n 4 citric acid monohydrate 10.5:1, add dispersant propylene glycol according to the mass m 1 citric acid monohydrate/m 2 propylene glycol 7.2:1, stir (70r/min) to make it dispersed evenly, then place in an 80°C oil bath and stir (70r/min) until sol is generated to obtain ferrite sol;
  • rare earth ferrite sol gel process the rare earth oxide sol obtained in step S1.1 and the ferrite sol obtained in step S1.2 are mixed and stirred (70r/min) in a molar ratio of rare earth element to iron element of 1:1, and 1 mol L -1 ammonia water is added to adjust the pH to 7.5 until a rare earth ferrite sol gel is formed;
  • step S1.4 vanadium-doped sol-gel slurry process: after the rare earth ferrite sol-gel obtained in step S1.3 is stirred (70r/min) evenly, it is placed in a constant temperature oscillation box and oscillated at 80-90°C for 10-12h, then taken out from the constant temperature oscillation box and added with vanadyl sulfate, the mass ratio of rare earth oxide sol and vanadyl sulfate is 1:5, after stirring (70r/min) evenly, it is placed in a constant temperature oscillation box and continues to oscillate until a composite gel is formed, to obtain vanadium-doped sol-gel slurry, i.e., vanadium oxide rare earth dual-doped ferrite magnetic composite film slurry;
  • step S2.1.1 placing the vanadium oxide rare earth dual-doped ferrite magnetic composite film slurry obtained in step S1.4 on the surface of a screen printer, placing a metal substrate on the bottom of the screen printer, and performing printing and coating, the mass ratio of the screen printing slurry to the substrate is 1:1, the number of printings is 3, and the printing immersion time is 10 minutes;
  • step S2.1.2 place the coated substrate obtained in step S2.1.1 into a muffle furnace, perform constant temperature thermal diffusion at 80°C, and then calcine into a film at a heating rate of 5°C/min, calcination temperature of 700°C, calcination time of 2h, and then anneal at an annealing rate of 10°C/min, anneal to 300°C, keep warm for 2h, and finally cool naturally in air.
  • a vanadium oxide rare earth dual doped ferrite magnetic composite thin film slurry preparation process and coating method is carried out according to the following steps:
  • rare earth oxide sol process dissolve cerium nitrate and samarium nitrate in water to form a saturated solution, add complexing agent citric acid monohydrate according to the amount of substance n 1 rare earth metal ion (cerium ion + samarium ion)/n 2 citric acid monohydrate 10.5:1, add dispersant propylene glycol according to the mass m 1 citric acid monohydrate/m 2 propylene glycol 7.2:1, stir (70r/min) to make it dispersed evenly, then place in an 80°C oil bath and stir (70r/min) until sol is generated to obtain rare earth oxide sol;
  • ferrite sol process dissolve ferric nitrate in water to form a saturated solution, add complexing agent citric acid monohydrate according to the amount of substance n 3 Fe 3+ /n 4 citric acid monohydrate 10.5:1, add dispersant propylene glycol according to the mass m 1 citric acid monohydrate/m 2 propylene glycol 7.2:1, stir (70r/min) to make it dispersed evenly, then place in an 80°C oil bath and stir (70r/min) until sol is generated to obtain ferrite sol;
  • rare earth ferrite sol gel process the rare earth oxide sol obtained in step S1.1 and the ferrite sol obtained in step S1.2 are mixed and stirred (70r/min) in a molar ratio of rare earth element to iron element of 1:1, and 1 mol L -1 ammonia water is added to adjust the pH to 7.5 until a rare earth ferrite sol gel is formed;
  • step S1.4 vanadium-doped sol-gel slurry process: after the rare earth ferrite sol-gel obtained in step S1.3 is stirred (70r/min) evenly, it is placed in a constant temperature oscillation box and oscillated at 80-90°C for 10-12h, then taken out from the constant temperature oscillation box and added with vanadyl sulfate, the mass ratio of rare earth oxide sol and vanadyl sulfate is 1:5, after stirring (70r/min) evenly, it is placed in a constant temperature oscillation box and continues to oscillate until a composite gel is formed, to obtain vanadium-doped sol-gel slurry, i.e., vanadium oxide rare earth dual-doped ferrite magnetic composite film slurry;
  • step S2.2.1 vertically suspend the substrate on a pulling machine, and use the vanadium oxide rare earth dual-doped ferrite magnetic composite thin film slurry in step S1.4 to pull and coat the film, the mass ratio of the slurry to the substrate is 1:3, the number of pulling is 5 times, and the pulling and immersion time is 30 minutes;
  • the present invention studies the physical phase of the film obtained after the rare earth (cerium nitrate and samarium nitrate)/(yttrium nitrate and zirconium nitrate) undergoes the entire preparation process.
  • the specific method is to prepare the substrate film through S1.1, S1.3 (without adding ferrite oxide sol), S1.4 (without adding vanadyl sulfate), and S2.1, and perform in-situ high-temperature XRD detection on the film in different intervals.
  • the yttrium zirconium rare earth oxide film is shown in Figure 1 and the samarium cerium rare earth oxide film is shown in Figure 2. It can be seen from the figure that the obtained film metal oxide presents a complete phase structure without the generation of other impurities, and by comparing the in-situ high-temperature XRD test results, it is shown that the obtained oxide film has good thermochemical stability.

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Abstract

本发明公开了一种氧化钒稀土双掺杂铁氧体磁性复合薄膜浆料制备工艺及镀膜方法。该方法通过稀土氧化物溶胶工艺、铁氧体溶胶工艺、稀土铁氧体溶胶凝胶工艺、掺钒溶胶凝胶浆料工艺得到氧化钒稀土双掺杂铁氧体磁性复合薄膜浆料，该浆料可通过改进的提拉镀膜和丝网印刷镀膜工艺完成基体镀膜。本发明解决了磁膜材料在使用过程中出现磁膜脱离基体而导致材料失活，材料的分布不均导致磁膜材料出现裂口和缝隙等问题，同时改善了磁性薄膜材料的性能。

Description

一种氧化钒稀土双掺杂铁氧体磁性复合薄膜浆料制备工艺及镀膜方法 技术领域
本发明属于钒基功能材料领域，具体涉及，钒氧化物作为热膨胀调节添加剂制备铁氧体磁性复合材料及其成材技术。
 背景技术
“十四五”期间国家明确大力发展5G基站、光伏、风电、储能、新能源汽车等领域，与磁材行业发展而言，是难得的拓展机遇期，谁能抢占市场需求先机，谁就能获得更强的竞争力和更长远的生命力。
铁磁性的金属氧化物材料主要包括永磁铁氧体材料和软磁铁氧体材料，是应用最为广泛的磁性材料之一。氧化铁粉是制备铁磁性的金属氧化物材料的主要原料，主要来源于钢铁制造行业和化工行业。永磁铁氧体材料是以三氧化二铁为主要原料，通过陶瓷工艺方法制造而成的具有强抗退磁能力和高的剩余磁感应强度的强磁性材料。永磁铁氧体材料分为烧结永磁铁氧体材料和粘结永磁铁氧体材料，其中烧结永磁铁氧体材料分为干压永磁铁氧体材料和湿压永磁铁氧体材料。铁氧体软磁材料是在较弱的磁场下，易磁化也易退磁的一种铁氧体材料。铁氧体软磁材料分为锰锌铁氧体材料，镍锌铁氧体材料，镁锌铁氧体材料以及锂锌铁氧体材料。
稀土由于其独特的4f电子层结构，可以在一些与3d元素化合物组合成的晶体结构中形成单轴磁各向异性，而具有十分优异的超常磁性能，如稀土永磁体中铷铁硼的磁能积最高，钐钴永磁体工作温度高，温度系数低。
目前已有研究表明纳米晶双相交换耦合稀土永磁材料具备较好的耐高温和高磁能积的优点，这种双相耦合稀土永磁材料是高磁晶各向异性的稀土永磁材料与高饱和磁化强度的软磁材料在纳米尺度交换耦合得到的。其理论最大磁能积远远超过铷铁硼，并且具备比铁钴镍高几十倍磁致伸缩系数。稀土氧化物掺杂铁氧体可以极大的优化铁氧体的性能，满足高端工业生产产品的应用需求，特别是在磁性薄膜材料中具备极高的应用前景。
[根据细则91更正 06.02.2024]
磁性薄膜材料是指厚度较薄的强磁性(铁磁性和亚铁磁性)材料，简称磁膜材料。目前工业上应用比较普遍的镀膜方法主要是提拉镀膜法和丝网印刷镀膜法，这两种方法因流程较短，成本较低具备较高的实际应用性，但存在因膜材料与基体的热膨胀系数难匹配，在使用过程中出现磁膜脱离基体而导致材料失活，材料的分布不均导致磁膜材料出现裂口和缝隙等问题。
发明内容
[根据细则91更正 06.02.2024]
本发明的目的是提供一种氧化钒稀土双掺杂铁氧体磁性复合薄膜浆料制备工艺及镀膜方法。利用氧化钒材料具有细化晶粒的效果，在磁膜材料中添加适量的氧化钒材料可以在一定程度上起到调节磁膜材料与金属基体材料的热膨胀系数匹配性，解决磁膜材料在使用过程中出现磁膜脱离基体而导致材料失活，材料的分布不均导致磁膜材料出现裂口和缝隙等问题，同时改善磁性薄膜材料的性能。
为实现上述目的，本发明通过以下技术方案实现：
一种氧化钒稀土双掺杂铁氧体磁性复合薄膜浆料制备工艺及镀膜方法包括如下步骤：
S1，氧化钒稀土双掺杂铁氧体磁性复合薄膜浆料的制备工艺：
S1.1，稀土氧化物溶胶工艺：将稀土类硝酸盐溶解到水中形成饱和溶液，加入分散剂和络合剂，搅拌使其分散均匀，置于油浴锅或水浴锅中搅拌直至溶胶生成，得到稀土氧化物溶胶；
S1.2，铁氧体溶胶工艺：将硝酸铁溶解到水中形成饱和溶液，加入分散剂和络合剂，搅拌使其分散均匀，置于油浴锅或水浴锅中搅拌直至溶胶生成，得到铁氧体溶胶；
[根据细则91更正 06.02.2024]
S1.3，稀土铁氧体溶胶凝胶工艺：将步骤S1.1所得稀土氧化物溶胶和S1.2所得铁氧体溶胶混合搅拌，同时加入1mol·L-1氨水调节PH至7.5，至稀土铁氧体溶胶凝胶形成；
S1.4，掺钒溶胶凝胶浆料工艺：将步骤S1.3所得稀土铁氧体溶胶凝胶搅拌均匀后，置恒温震荡箱中在80～90℃震荡10～12h，然后从恒温震荡箱中取出加入氧化钒前驱体搅拌均匀后，放入恒温振荡箱中继续震荡至复合凝胶形成，得到掺钒溶胶凝胶浆料，即氧化钒稀土双掺杂铁氧体磁性复合薄膜浆料；
S2，镀膜：
步骤S1.4得到的氧化钒稀土双掺杂铁氧体磁性复合薄膜浆料镀膜方法包括丝网印刷法和提拉法，操作步骤如下：
S2.1，丝网印刷法：
S2.1.1，将步骤S1.4所得氧化钒稀土双掺杂铁氧体磁性复合薄膜浆料置于丝网印刷机表面，将金属基体置于丝网印刷机底面，进行印刷镀膜，丝网印刷浆料与基体质量比为1:1，印刷次数为3次，印刷浸渍时间为10～15min；
S2.1.2，将步骤S2.1.1所得镀膜后基体放入马弗炉中，80～120℃进行恒温热扩散，然后煅烧成膜，升温速率5～10℃/min，煅烧温度700～750℃，煅烧时间2～3h，再退火，退火速率10～15℃/min，退火至300～400℃，保温2～3h，最后在空气中自然冷却；
S2.2，提拉法：
S2.2.1，将基体垂直悬置于提拉机上，用步骤S1.4氧化钒稀土双掺杂铁氧体磁性复合薄膜浆料进行提拉镀膜，浆料与基体质量比为1:3，提拉次数为5次，提拉浸渍时间30～40min；
S2.2.2，将S2.2.1中所得镀膜基体放入马弗炉中，70～100℃进行恒温热扩散，然后煅烧成膜，煅烧升温速率5～10℃/min，煅烧温度600～650℃，煅烧时间2～3h，再退火，退火速率10～15℃/min，退火至200～300℃，保温2～3h，最后在空气中自然冷却。
所述的稀土类硝酸盐包括硝酸铈、硝酸钐、硝酸钇、硝酸锆、硝酸镧；所述的络合剂为一水合柠檬酸，物质的量n1稀土金属离子/n2一水合柠檬酸为10～11:1，物质的量n3Fe3+/n4一水合柠檬酸为10～11:1；所述的分散剂包括丙二醇、乙二醇，质量m1一水合柠檬酸/m2分散剂为7～8:1。
所述的油浴锅和水浴锅的温度为80～100℃，所述的搅拌速率为70～100r/min。
所述的稀土氧化物溶胶和铁氧体溶胶按照稀土元素与铁元素的摩尔比1～1.2:0.8～1计算二者加入量。
所述的氧化钒前驱体包括硫酸氧钒，稀土氧化物溶胶和氧化钒前驱体的质量比为0～1:5～6。
与现有技术相比，本发明的有益效果是：
(1)本发明采用添加复合稀土的可极大的提高磁材的性能；
(2)本发明对两种传统的镀膜工艺丝网印刷和提拉镀膜进行了优化，得到的膜层性能优异；
[根据细则91更正 06.02.2024]
(3)采用氧化钒前驱体调节膜材料与基体的热膨胀系数的匹配性，避免出现磁膜脱离基体而导致材料失活，材料的分布不均导致磁膜材料出现裂口和缝隙等问题。
 附图说明
图1是钇锆稀土氧化物膜层XRD图。
图2是钐铈稀土氧化物膜层XRD图。
 具体实施方式
一种氧化钒稀土双掺杂铁氧体磁性复合薄膜浆料制备工艺及镀膜方法，采用以下实施案例举例说明了本发明的具体实施方式和实施效果。
【实施例1】：
一种氧化钒稀土双掺杂铁氧体磁性复合薄膜浆料制备工艺及镀膜方法按照如下步骤进行：
S1，氧化钒稀土双掺杂铁氧体磁性复合薄膜浆料的制备工艺：
S1.1，稀土氧化物溶胶工艺：将硝酸钇，硝酸锆溶解到水中形成饱和溶液，按照物质的量n1稀土金属离子(钇离子+锆离子)/n2一水合柠檬酸10.5:1加入络合剂一水合柠檬酸，按照质量m1一水合柠檬酸/m2丙二醇7.2:1加入分散剂丙二醇，搅拌(70r/min)使其分散均匀，然后置于80℃油浴锅中搅拌(70r/min)至溶胶生成，得到稀土氧化物溶胶；
S1.2，铁氧体溶胶工艺：将硝酸铁溶解到水中形成饱和溶液，按照物质的量n3Fe3+/n4一水合柠檬酸10.5:1加入络合剂一水合柠檬酸，按照质量m1一水合柠檬酸/m2丙二醇7.2:1加入分散剂丙二醇，搅拌(70r/min)使其分散均匀，然后置于80℃油浴锅中搅拌(70r/min)至溶胶生成，得到铁氧体溶胶；
S1.3，稀土铁氧体溶胶凝胶工艺：将步骤S1.1所得稀土氧化物溶胶和S1.2所得铁氧体溶胶，按照稀土元素与铁元素的摩尔比1:1混合搅拌(70r/min)，同时加入1mol L-1氨水调节PH至7.5，至稀土铁氧体溶胶凝胶形成；
S1.4，掺钒溶胶凝胶浆料工艺：将步骤S1.3所得稀土铁氧体溶胶凝胶搅拌(70r/min)均匀后，置恒温震荡箱中在80～90℃震荡10～12h，然后从恒温震荡箱中取出加入硫酸氧钒，稀土氧化物溶胶和硫酸氧钒的质量比为1:5，搅拌(70r/min)均匀后，放入恒温振荡箱中继续震荡至复合凝胶形成，得到掺钒溶胶凝胶浆料，即氧化钒稀土双掺杂铁氧体磁性复合薄膜浆料；
S2，镀膜：
S2.1，丝网印刷法：
S2.1.1，将步骤S1.4所得氧化钒稀土双掺杂铁氧体磁性复合薄膜浆料置于丝网印刷机表面，将金属基体置于丝网印刷机底面，进行印刷镀膜，丝网印刷浆料与基体质量比为1:1，印刷次数为3次，印刷浸渍时间为10min；
S2.1.2，将步骤S2.1.1所得镀膜后基体放入马弗炉中，80℃进行恒温热扩散，然后煅烧成膜，升温速率5℃/min，煅烧温度700℃，煅烧时间2h，再退火，退火速率10℃/min，退火至300℃，保温2h，最后在空气中自然冷却。
【实施例2】：
一种氧化钒稀土双掺杂铁氧体磁性复合薄膜浆料制备工艺及镀膜方法按照如下步骤进行：
S1，氧化钒稀土双掺杂铁氧体磁性复合薄膜浆料的制备工艺：
S1.1，稀土氧化物溶胶工艺：将硝酸钇，硝酸锆溶解到水中形成饱和溶液，按照物质的量n1稀土金属离子(钇离子+锆离子)/n2一水合柠檬酸10.5:1加入络合剂一水合柠檬酸，按照质量m1一水合柠檬酸/m2丙二醇7.2:1加入分散剂丙二醇，搅拌(70r/min)使其分散均匀，然后置于80℃油浴锅中搅拌(70r/min)至溶胶生成，得到稀土氧化物溶胶；
S1.2，铁氧体溶胶工艺：将硝酸铁溶解到水中形成饱和溶液，按照物质的量n3Fe3+/n4一水合柠檬酸10.5:1加入络合剂一水合柠檬酸，按照质量m1一水合柠檬酸/m2丙二醇7.2:1加入分散剂丙二醇，搅拌(70r/min)使其分散均匀，然后置于80℃油浴锅中搅拌(70r/min)至溶胶生成，得到铁氧体溶胶；
S1.3，稀土铁氧体溶胶凝胶工艺：将步骤S1.1所得稀土氧化物溶胶和S1.2所得铁氧体溶胶，按照稀土元素与铁元素的摩尔比1:1混合搅拌(70r/min)，同时加入1mol L-1氨水调节PH至7.5，至稀土铁氧体溶胶凝胶形成；
S1.4，掺钒溶胶凝胶浆料工艺：将步骤S1.3所得稀土铁氧体溶胶凝胶搅拌(70r/min)均匀后，置恒温震荡箱中在80～90℃震荡10～12h，然后从恒温震荡箱中取出加入硫酸氧钒，稀土氧化物溶胶和硫酸氧钒的质量比为1:5，搅拌(70r/min)均匀后，放入恒温振荡箱中继续震荡至复合凝胶形成，得到掺钒溶胶凝胶浆料，即氧化钒稀土双掺杂铁氧体磁性复合薄膜浆料；
S2，镀膜：
S2.2，提拉法：
S2.2.1，将基体垂直悬置于提拉机上，用步骤S1.4氧化钒稀土双掺杂铁氧体磁性复合薄膜浆料进行提拉镀膜，浆料与基体质量比为1:3，提拉次数为5次，提拉浸渍时间30min；
S2.2.2，将S2.2.1中所得镀膜基体放入马弗炉中，100℃进行恒温热扩散，然后煅烧成膜，煅烧升温速率5℃/min，煅烧温度600℃，煅烧时间2h，再退火，退火速率10℃/min，退火至200℃，保温2h，最后在空气中自然冷却。
【实施例3】：
一种氧化钒稀土双掺杂铁氧体磁性复合薄膜浆料制备工艺及镀膜方法按照如下步骤进行：
S1，氧化钒稀土双掺杂铁氧体磁性复合薄膜浆料的制备工艺：
S1.1，稀土氧化物溶胶工艺：将硝酸铈，硝酸钐溶解到水中形成饱和溶液，按照物质的量n1稀土金属离子(铈离子+钐离子)/n2一水合柠檬酸10.5:1加入络合剂一水合柠檬酸，按照质量m1一水合柠檬酸/m2丙二醇7.2:1加入分散剂丙二醇，搅拌(70r/min)使其分散均匀，然后置于80℃油浴锅中搅拌(70r/min)至溶胶生成，得到稀土氧化物溶胶；
S1.2，铁氧体溶胶工艺：将硝酸铁溶解到水中形成饱和溶液，按照物质的量n3Fe3+/n4一水合柠檬酸10.5:1加入络合剂一水合柠檬酸，按照质量m1一水合柠檬酸/m2丙二醇7.2:1加入分散剂丙二醇，搅拌(70r/min)使其分散均匀，然后置于80℃油浴锅中搅拌(70r/min)至溶胶生成，得到铁氧体溶胶；
S1.3，稀土铁氧体溶胶凝胶工艺：将步骤S1.1所得稀土氧化物溶胶和S1.2所得铁氧体溶胶，按照稀土元素与铁元素的摩尔比1:1混合搅拌(70r/min)，同时加入1mol L-1氨水调节PH至7.5，至稀土铁氧体溶胶凝胶形成；
S1.4，掺钒溶胶凝胶浆料工艺：将步骤S1.3所得稀土铁氧体溶胶凝胶搅拌(70r/min)均匀后，置恒温震荡箱中在80～90℃震荡10～12h，然后从恒温震荡箱中取出加入硫酸氧钒，稀土氧化物溶胶和硫酸氧钒的质量比为1:5，搅拌(70r/min)均匀后，放入恒温振荡箱中继续震荡至复合凝胶形成，得到掺钒溶胶凝胶浆料，即氧化钒稀土双掺杂铁氧体磁性复合薄膜浆料；
S2，镀膜：
S2.1，丝网印刷法：
S2.1.1，将步骤S1.4所得氧化钒稀土双掺杂铁氧体磁性复合薄膜浆料置于丝网印刷机表面，将金属基体置于丝网印刷机底面，进行印刷镀膜，丝网印刷浆料与基体质量比为1:1，印刷次数为3次，印刷浸渍时间为10min；
S2.1.2，将步骤S2.1.1所得镀膜后基体放入马弗炉中，80℃进行恒温热扩散，然后煅烧成膜，升温速率5℃/min，煅烧温度700℃，煅烧时间2h，再退火，退火速率10℃/min，退火至300℃，保温2h，最后在空气中自然冷却。
【实施例4】：
一种氧化钒稀土双掺杂铁氧体磁性复合薄膜浆料制备工艺及镀膜方法按照如下步骤进行：
S1，氧化钒稀土双掺杂铁氧体磁性复合薄膜浆料的制备工艺：
S1.1，稀土氧化物溶胶工艺：将硝酸铈，硝酸钐溶解到水中形成饱和溶液，按照物质的量n1稀土金属离子(铈离子+钐离子)/n2一水合柠檬酸10.5:1加入络合剂一水合柠檬酸，按照质量m1一水合柠檬酸/m2丙二醇7.2:1加入分散剂丙二醇，搅拌(70r/min)使其分散均匀，然后置于80℃油浴锅中搅拌(70r/min)至溶胶生成，得到稀土氧化物溶胶；
S1.2，铁氧体溶胶工艺：将硝酸铁溶解到水中形成饱和溶液，按照物质的量n3Fe3+/n4一水合柠檬酸10.5:1加入络合剂一水合柠檬酸，按照质量m1一水合柠檬酸/m2丙二醇7.2:1加入分散剂丙二醇，搅拌(70r/min)使其分散均匀，然后置于80℃油浴锅中搅拌(70r/min)至溶胶生成，得到铁氧体溶胶；
S1.3，稀土铁氧体溶胶凝胶工艺：将步骤S1.1所得稀土氧化物溶胶和S1.2所得铁氧体溶胶，按照稀土元素与铁元素的摩尔比1:1混合搅拌(70r/min)，同时加入1mol L-1氨水调节PH至7.5，至稀土铁氧体溶胶凝胶形成；
S1.4，掺钒溶胶凝胶浆料工艺：将步骤S1.3所得稀土铁氧体溶胶凝胶搅拌(70r/min)均匀后，置恒温震荡箱中在80～90℃震荡10～12h，然后从恒温震荡箱中取出加入硫酸氧钒，稀土氧化物溶胶和硫酸氧钒的质量比为1:5，搅拌(70r/min)均匀后，放入恒温振荡箱中继续震荡至复合凝胶形成，得到掺钒溶胶凝胶浆料，即氧化钒稀土双掺杂铁氧体磁性复合薄膜浆料；
S2，镀膜：
S2.2，提拉法：
S2.2.1，将基体垂直悬置于提拉机上，用步骤S1.4氧化钒稀土双掺杂铁氧体磁性复合薄膜浆料进行提拉镀膜，浆料与基体质量比为1:3，提拉次数为5次，提拉浸渍时间30min；
S2.2.2，将S2.2.1中所得镀膜基体放入马弗炉中，100℃进行恒温热扩散，然后煅烧成膜，煅烧升温速率5℃/min，煅烧温度600℃，煅烧时间2h，再退火，退火速率10℃/min，退火至200℃，保温2h，最后在空气中自然冷却。
为了证明本工艺能得到完好的稀土相，本发明研究了稀土(硝酸铈和硝酸钐)/(硝酸钇和硝酸锆)经过整个制备过程后得到膜层的物相。具体方法是通过S1.1、S1.3(不添加氧化铁氧体溶胶)、S1.4(不添加硫酸氧钒)、S2.1制备出基体薄膜，对膜层进行不同区间的原位高温XRD检测，钇锆稀土氧化物膜层见图1和钐铈稀土氧化物膜层图2。由图可以看出所得膜层金属氧化物呈现完好的相结构，没有其他杂相生成，并且通过对比原位高温XRD测试结果说明，所得氧化物薄膜具备良好的热化学稳定性。
本领域的技术人员容易理解，以上所述仅为本发明的较佳实施例而已，并不用以限制本发明，凡在本发明的精神和原则之内所作的任何修改、等同替换和改进等，均应包含在本发明的保护范围之内。

Claims (5)

  1. [根据细则91更正 06.02.2024]
    一种氧化钒稀土双掺杂铁氧体磁性复合薄膜浆料制备工艺及镀膜方法，其特征在于，所述的氧化钒稀土双掺杂铁氧体磁性复合薄膜浆料制备工艺及镀膜方法包括如下步骤：
    S1，氧化钒稀土双掺杂铁氧体磁性复合薄膜浆料的制备工艺：
    S1.1，稀土氧化物溶胶工艺：将稀土类硝酸盐溶解到水中形成饱和溶液，加入分散剂和络合剂，搅拌使其分散均匀，置于油浴锅或水浴锅中搅拌直至溶胶生成，得到稀土氧化物溶胶；
    S1.2，铁氧体溶胶工艺：将硝酸铁溶解到水中形成饱和溶液，加入分散剂和络合剂，搅拌使其分散均匀，置于油浴锅或水浴锅中搅拌直至溶胶生成，得到铁氧体溶胶；
    S1.3，稀土铁氧体溶胶凝胶工艺：将步骤S1.1所得稀土氧化物溶胶和S1.2所得铁氧体溶胶混合搅拌，同时加入1mol·L-1氨水调节pH至7.5，至稀土铁氧体溶胶凝胶形成；
    S1.4，掺钒溶胶凝胶浆料工艺：将步骤S1.3所得稀土铁氧体溶胶凝胶搅拌均匀后，置恒温震荡箱中在80～90℃震荡10～12h，然后从恒温震荡箱中取出加入氧化钒前驱体搅拌均匀后，放入恒温振荡箱中继续震荡至复合凝胶形成，得到掺钒溶胶凝胶浆料，即氧化钒稀土双掺杂铁氧体磁性复合薄膜浆料；
    S2，镀膜：
    步骤S1.4得到的氧化钒稀土双掺杂铁氧体磁性复合薄膜浆料镀膜方法包括丝网印刷法和提拉法，操作步骤如下：
    S2.1，丝网印刷法：
    S2.1.1，将步骤S1.4所得氧化钒稀土双掺杂铁氧体磁性复合薄膜浆料置于丝网印刷机表面，将金属基体置于丝网印刷机底面，进行印刷镀膜，丝网印刷浆料与基体质量比为1:1，印刷次数为3次，印刷浸渍时间为10～15min；
    S2.1.2，将步骤S2.1.1所得镀膜后基体放入马弗炉中，80～120℃进行恒温热扩散，然后煅烧成膜，升温速率5～10℃/min，煅烧温度700～750℃，煅烧时间2～3h，再退火，退火速率10～15℃/min，退火至300～400℃，保温2～3h，最后在空气中自然冷却；
    S2.2，提拉法：
    S2.2.1，将基体垂直悬置于提拉机上，用步骤S1.4氧化钒稀土双掺杂铁氧体磁性复合薄膜浆料进行提拉镀膜，浆料与基体质量比为1:3，提拉次数为5次，提拉浸渍时间30～40min；
    S2.2.2，将S2.2.1中所得镀膜基体放入马弗炉中，70～100℃进行恒温热扩散，然后煅烧成膜，煅烧升温速率5～10℃/min，煅烧温度600～650℃，煅烧时间2～3h，再退火，退火速率10～15℃/min，退火至200～300℃，保温2～3h，最后在空气中自然冷却。
  2. 根据权利要求1所述的一种氧化钒稀土双掺杂铁氧体磁性复合薄膜浆料制备工艺及镀膜方法，其特征在于，所述的稀土类硝酸盐包括硝酸铈、硝酸钐、硝酸钇、硝酸锆、硝酸镧；所述的络合剂为一水合柠檬酸，物质的量n1稀土金属离子/n2一水合柠檬酸为10～11:1，物质的量n3Fe3+/n4一水合柠檬酸为10～11:1；所述的分散剂包括丙二醇、乙二醇，质量m1一水合柠檬酸/m2分散剂为7～8:1。
  3. 根据权利要求1所述的一种氧化钒稀土双掺杂铁氧体磁性复合薄膜浆料制备工艺及镀膜方法，其特征在于，所述的油浴锅和水浴锅的温度为80～100℃，所述的搅拌速率为70～100r/min。
  4. 根据权利要求1所述的一种氧化钒稀土双掺杂铁氧体磁性复合薄膜浆料制备工艺及镀膜方法，其特征在于，所述的稀土氧化物溶胶和铁氧体溶胶按照稀土元素与铁元素的摩尔比1～1.2:0.8～1计算二者加入量。
  5. 根据权利要求1所述的一种氧化钒稀土双掺杂铁氧体磁性复合薄膜浆料制备工艺及镀膜方法，其特征在于，所述的氧化钒前驱体包括硫酸氧钒，稀土氧化物溶胶和氧化钒前驱体的质量比为0～1:5～6。
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