33 results about "Melt quenching" patented technology

A ternary positive electrode material modified with a glassy metal-organic framework, and a preparation method therefor and the use thereof. The ternary positive electrode material modified with a glassy metal-organic framework is obtained by grinding and mixing a ternary positive electrode material and a metal-organic framework, and then subjecting same to a melt quenching treatment under a protective atmosphere. Forming a crack-free glassy metal-organic framework containing nano / sub-nano pores on a surface of the ternary positive electrode material can significantly improve the stability of the ternary positive material, alleviate the dissolution of transition metals, and ultimately improve the electrochemical performance of batteries and prolong the service life of the batteries.

The invention discloses a preparation method of a neodymium-yttrium-iron-boron magnet with core-shell heterostructure crystal grains. The method comprises the following steps: preparing neodymium-yttrium-iron-boron rapid-quenching amorphous strips with different yttrium contents through a melting rapid-quenching technology; carrying out crystallization annealing on the amorphous rapid quenching belt at different temperatures, and preparing powder particles with the particle size of 2-5 microns through hydrogen demolishing and jet milling; and the neodymium-yttrium-iron-boron magnet with the core-shell heterostructure is prepared through high-temperature vacuum sintering after orientation forming and cold isostatic pressing of the neodymium-yttrium-iron-boron magnet in a magnetic field. According to the method, dynamic adjustment of distribution of yttrium in a crystal grain core-shell area is achieved by controlling the crystallization temperature of an amorphous rapid quenching zone, and therefore the coercive force of the magnet is improved.

The invention discloses a cuprous iodide-based complex scintillator with a thermally activated delayed fluorescence characteristic as well as a preparation method and application of the cuprous iodide-based complex scintillator. The structural general formula of the complex scintillator is shown in the specification, and L represents a P-containing ligand with a conjugated structure. A series of single crystals are grown by adopting a saturated solution volatilization method, the cost is low, the preparation condition is simple and mild, the environment is friendly, and the obtained cuprous iodide complex scintillator has good scintillation performance and good stability in the single crystal state and the glass state, has an excellent response effect under the X-ray excitation condition, and can be used for preparing the X-ray scintillator. The flexible film prepared by doping and the glassy film prepared by melting and quenching can realize high-resolution dynamic X-ray imaging.

The present invention relates to the field of solid electrolyte technology, and in particular to a method for preparing a sulfide solid electrolyte. The method for preparing a sulfide solid electrolyte comprises the following steps: a sulfide solid electrolyte precursor is subjected to at least two electromagnetic wave treatments under a protective atmosphere; the preparation of the sulfide solid electrolyte precursor comprises: mixing and ball milling the sulfide solid electrolyte raw materials. The method for preparing a sulfide solid electrolyte of the present invention is different from the traditional melt quenching process. It is treated at least twice with electromagnetic waves, does not need to be heated to a high temperature, and can simply and quickly obtain a uniform, highly conductive sulfide solid electrolyte through the material's absorption characteristics of electromagnetic waves of different frequencies.

The application discloses a high-density Tb 3+ The application discloses a doped full-oxide germanate scintillation glass and a preparation method thereof. The scintillation glass comprises a matrix glass and a luminescent center. The matrix glass is composed of oxides, and specific components are GeO2-Al2O3-BaO-La2O3-Lu2O3-Gd2O3; and the luminescent center is a Tb 3+ The application does not involve Pb, Cd and other high-pollution heavy metals, is environment-friendly, does not contain B2O3, P2O5 and other substances with high phonon energy, and is beneficial to improving the luminescent efficiency of Tb 3+ The full-oxide scintillation glass is prepared by a melting quenching method, and has the characteristics of environment-friendliness and high density.

The application discloses a kind of middle wave infrared composite glass optical fiber and preparation method thereof, and the composite glass optical fiber is composed of fluoride glass core, fluoride glass inner cladding, chalcogenide glass outer cladding, polymer coating layer and infrared end cap.The difference between the thermal expansion coefficient of fluoride glass used for core, fluoride glass used for inner cladding and chalcogenide glass used for outer cladding is less than or equal to 4×10 ‑6 The temperature interval of any two of them has overlap. First, the fluoride glass rod of core is prepared by using melt quenching technology, then the inner cladding fluoride glass sleeve and outer cladding chalcogenide glass sleeve are prepared by using spin tube technology, then the optical fiber is drawn by using rod-in-tube method, and finally the infrared end cap is fused with the optical fiber. The composite glass optical fiber can effectively avoid the fluoride glass core and inner cladding from being eroded by water vapor in the air, thereby significantly improving the 3-5 μm laser power that can be transmitted by the optical fiber and greatly prolonging the service life thereof; the preparation method has low requirement on drawing equipment and low cost.

The invention discloses fluoride nanocrystalline glass ceramic containing a Pb4Y3F17 crystal phase. The fluoride nanocrystalline glass ceramic is prepared from the following raw material components in percentage by mole: 30 to 35 mol percent of AlF3, 10 to 15 mol percent of BaF2, 10 to 25 mol percent of YF3, 25 to 30 mol percent of PbF2, 8 to 12 mol percent of MgF2 and 1 to 15 mol percent of HoF3, the fluoride nanocrystalline glass ceramic containing the Pb4Y3F17 crystal phase is prepared by the following steps: obtaining a fluoroaluminate glass precursor by adopting a melting quenching method, and then preparing the fluoride nanocrystalline glass ceramic by utilizing a heat treatment method. The invention also discloses a preparation method of the fluoride nanocrystalline glass ceramic containing the Pb4Y3F17 crystal phase. According to the invention, the Pb4Y3F17 crystal with a single crystal phase is separated out from fluoroaluminate glass, so that a crystal field environment which is more stable for the luminescence characteristic of rare earth elements is obtained.

This invention provides a lithium-ion battery cathode material of lithium manganese iron phosphate and its preparation method. The preparation method specifically includes: S1, preparation by dopamine oxidative self-polymerization; S2, preparation of ultrafine LMFP@C composite material by single-point doping; S3, preparation of single-crystal LMFP@C. ‑ Preparation of @C double-coated multi-site doped composite material: LMFP@C ultrafine powder was annealed in a multi-functional sintering furnace at 270°C-650°C for 1-4 hours to form Na + / La 3+ / Cl ‑ LMFP@Cl, a multi-site doped single-crystal LMFP double-shell composite material that partially replaces Li sites, Mn / Fe sites, and PO4 sites, respectively. ‑ @C. This invention addresses the problems of manganese leaching, poor conductivity, and poor high-temperature stability in lithium manganese iron phosphate cathode materials. It synergistically utilizes single crystallization, multi-site multi-component element doping, and surface double coating measures. The modification strategy is achieved through oxidative self-polymerization conformal coating-melt quenching-recrystallization annealing technology. It has the advantages of simple operation, liquid phase synthesis, high yield, and low cost, making it suitable for large-scale production.

According to the preparation method of the detector provided by the invention, the amorphous layer is prepared by adopting a melt quenching technology, the amorphous layer is cooled on the surface of the substrate to form the amorphous film layer, and the amorphous film layer is heated to be liquefied. The liquefied amorphous film layer is bonded with a single crystal, the single crystal is formed on the surface of the amorphous film layer after cooling, and an electrode layer is prepared on the surface of the single crystal. According to the detector provided by the invention, due to the fact that an amorphous material has strong interface adhesion, tight electrical connection is constructed between a functional layer and a substrate; the amorphous buffer layer has no grain boundary, so that a grain boundary recombination center is thoroughly eliminated, and efficient transmission of carriers is ensured; the amorphous material has strong plastic deformation capacity, the interface does not need to follow a strict lattice matching mode, and the amorphous material has less interface stress and interface defects; the amorphous material can fill interface holes and cracks and passivate interface defects.

The application discloses an organic-inorganic hybrid perovskite glass material with long afterglow phosphorescence and a preparation method thereof. The method is to use metal salt and organic ion salt as raw materials, and a low-cost melt quenching method without any solvent participation is used to obtain the organic-inorganic hybrid perovskite glass material with long lifetime phosphorescence. There is a strong intramolecular interaction between the metal salt anion and the organic cation, which can greatly inhibit the thermal vibration and non-radiative transition of the organic luminescent group; in addition, the formation of the glass provides a rigid molecular environment for the chromophore. The organic-inorganic hybrid perovskite glass material prepared by the application has high transparency, high hardness and high-efficiency long-lifetime phosphorescence emission performance. The preparation method of the application has low cost, simple operation and is easy to mass industrial production, and has wide application prospects in the fields of anti-counterfeiting, information security and decoration.

The invention relates to a solid material obtainable by melt quenching a mixture of lithium sulfide, boron sulfide, boron oxide and a lithium halide to form a glassy solid suitable for use as a lithium ion conductive electrolyte. These sulfide-based lithium ion conductive solid electrolytes exhibit high ionic conductivity.

The present invention discloses a preparation method of a high entropy alloy catalyst based on ultra-low temperature treatment strengthening, specifically: smelting a precursor metal to form a HEAs ingot with an FCC crystal structure; HEAs ingots are made into HEAs ribbons or sheets by melt quenching or rolling method; HEAs ribbons or sheets are placed in an ultra-low temperature medium for ultra-low temperature treatment, then returned to temperature at room temperature, and ultra-low temperature and return to temperature treatment are repeated 1 5 times to obtain a HEAs catalyst with high catalytic performance. The high entropy alloy HEAs of the present invention has excellent mechanical properties, high electrical conductivity, and strong stability, and can effectively reduce the amount of precious metals used; At the same time, by virtue of the interface synergy between alkali metals and precious metals and between precious metals and precious metals, catalytic performance is significantly improved. In addition, ultra-low temperature treatment is simple and easy to operate, can refine grains, and regulate the orientation of the HEAs surface crystal planes, which will further significantly enhance the catalytic performance of the catalyst.

The present invention belongs to the field of optical functional materials and detection technology, and discloses a non-lead glass ceramic scintillator and a preparation method thereof. (1) The components of the precursor glass are SiO2-Na2CO3-Al2O3-CaCO3-NaF-LuF3-GdF3-CeF3; (2) Using the glass components in step (1), SiO2, Na2CO3, Al2O3, CaCO3, NaF, LuF3, GdF3, CeF3 and other raw materials are accurately weighed, and an appropriate amount of Al powder is added, and the mixture is fully mixed and then transferred into an alumina crucible; (3) The precursor glass in step (2) is prepared by a melt quenching method, and the melting temperature is 1350-1450°C and the temperature is kept for 1 to 2 hours; (4) The precursor glass obtained in step (3) is subjected to a crystallization treatment to obtain a Na5Lu 9‑x Gd x F 32 :Ce 3+ The scintillator preparation method of the present invention is simple, the preparation cycle is short, the raw materials used are low in cost and do not contain lead, and are very suitable for large-scale industrial production. The luminescent center of the scintillator in the present invention is Ce 3+ ions, Al powder addition can effectively inhibit Ce 3+ At the same time, energy is easily transferred from Gd ions to Ce ions, improving luminescence efficiency.

The invention relates to a preparation method of a low-rare-earth and high-performance SmFe12-based permanent magnet alloy. The preparation method comprises the following steps: proportioning elementary substance raw materials according to the proportion of Sm < 0.75 + x > Zr < 0.25 > Fe < 8.8 + y > Co < 2.2 + z > Ti < 1 + m > B < n >, and then preparing the SmFe12-based permanent magnet alloy through the steps of electric arc melting, melt rapid quenching, heat treatment and the like. According to the invention, Zr, Co, Ti and B elements are introduced into the SmFe12-based permanent magnet alloy, so that the permanent magnet alloy has lower rare earth content and minimum loss of ferromagnetic element content, the utilization rate and high-valued level of rare earth elements are improved, the generation of alpha-Fe phase is effectively inhibited, a better phase composition structure is obtained, the balance between coercive force and residual magnetism is realized, and the coercive force and residual magnetism are improved. The SmFe12-based permanent magnet alloy has excellent magnetic performance, the coercive force of the SmFe12-based permanent magnet alloy reaches 8.78 kOe, and the maximum magnetic energy product of the SmFe12-based permanent magnet alloy is 71 kJ / m.

The application provides an iron-based amorphous soft magnetic alloy strip, a preparation method and application thereof, and relates to the technical field of soft magnetic materials. The iron-based amorphous soft magnetic alloy strip realizes the balance of high saturation magnetic induction intensity, low coercivity, high amorphous forming ability and excellent processing performance through the synergy of accurate regulation of component proportion, element function, complete amorphous structure and heat treatment process. B s The torque output and power density of the motor are ensured, the low iron loss and high efficiency of the motor in high-frequency operation are ensured, and the excellent toughness meets the needs of precise machining of the iron core and long-term operation reliability. H c The torque output and power density of the motor are ensured, the low iron loss and high efficiency of the motor in high-frequency operation are ensured, and the excellent toughness meets the needs of precise machining of the iron core and long-term operation reliability. The preparation method of the iron-based amorphous soft magnetic alloy strip is designed through the process of vacuum induction melting + melt quenching + longitudinal magnetic field heat treatment, accurately matches the performance requirements of the component system, has the industrialization advantages of process stability, high efficiency and controllable cost, and provides a reliable technical path for the large-scale production and high-end application of the iron-based amorphous soft magnetic alloy strip.

The application discloses a kind of metal organic framework glass gas separation membranes and its preparation method and application, belong to membrane material field, the preparation method of metal organic framework glass gas separation membrane provided by the present application is pre-coated with the mixed solution of nano zinc oxide and polymer on carrier ultrasonic, then crystal membrane is synthesized with solvent thermal method, finally melt quenching into glass membrane, specifically includes the following steps: S1: nano zinc oxide-polymer mixed solution is coated on the surface of carrier;S2: preparation precursor solution;S3: after the carrier treated in step S1 is placed in precursor solution, solvent thermal treatment is carried out and cooling, obtain metal organic framework crystal membrane;S4: the metal organic framework crystal membrane prepared in step S3 is melt quenching, and metal organic framework glass gas separation membrane is prepared.The method is simple to operate, while not using zinc nitrate hexahydrate, the permeability and porosity of glass membrane are improved.

The invention relates to the technical field of photoelectric materials and scintillators, and particularly discloses ionic rare earth complex scintillator glass as well as a low-temperature melting preparation method and application thereof. According to the invention, a low-temperature melting and quenching process is developed, the crystalline ionic europium complex is directly melted and rapidly cooled under a solvent-free condition, and direct preparation of the ionic rare earth complex transparent scintillator glass is realized. The prepared glass scintillator material has high transparency, high luminous efficiency, high rare earth content and excellent machinability, light scattering caused by particle aggregation and phase separation in a traditional composite film is fundamentally eliminated, and the concentration quenching limitation is broken through. The glass scintillator material shows excellent luminescence performance under X-ray excitation, and the imaging resolution and the detection sensitivity can be remarkably improved. The invention provides a feasible technical path for the development of a novel rare earth scintillator material, and has important application prospects in the fields of medical imaging, nondestructive testing, high-energy radiation detection and the like.

The invention provides a lithium iron manganese phosphate composite material for a positive electrode of a lithium ion battery and a preparation method. The preparation method specifically comprises the following steps: S1, dopamine oxidation auto-polymerization preparation; s2, preparing a unit point doped superfine LMFP (at) C composite material; and S3, preparation of the single crystal LMFP (at) Cl-(at) C double-coated multi-site doped composite material: annealing the LMFP (at) C ultrafine powder in a multifunctional sintering furnace at 270-650 DEG C for 1-4 hours to form the multi-site doped single crystal LMFP double-coated shell composite material LMFP (at) Cl-(at) C with Na < + > / La < 3 + > / Cl <-> respectively and partially replacing Li site, Mn / Fe site and O site of PO4. Aiming at the problems of dissolution of manganese, poor conductivity and poor high-temperature stability of a lithium manganese iron phosphate positive electrode material, the modification strategy is realized through an oxidation auto-polymerization conformal coating-melting quenching-recrystallization annealing technology by synergistically utilizing measures of single crystallization, multi-site multi-component element doping, surface double coating and the like; the method has the advantages of simplicity in operation, liquid phase synthesis, high yield, low cost and suitability for large-scale production.

The invention provides ZIFs glass, a modified lithium ion battery positive electrode material and a preparation method, the ZIFs glass takes imidazole and benzimidazole as organic ligands, ZIFs crystals are prepared from the organic ligands and a transition metal soluble salt according to a specific molar ratio and reaction temperature through a solvothermal synthesis method, and then the ZIFs glass is prepared through a melting quenching method. The modified lithium ion battery positive electrode material is obtained by taking ZIFs glass as a modified material and heating at the temperature higher than the glass transition temperature of the ZIFs glass. The coating of the ZIFs glass material can isolate electrolyte corrosion, so that the dissolution of transition metal is inhibited; and the high flexibility of the ZIFs glass can adapt to the volume change of the positive electrode material, so that cracks are reduced, the cracking of the coating layer is avoided, and the safety of the lithium ion battery is improved. Meanwhile, the porous structure of the ZIFs glass can provide a continuous lithium ion transmission channel for the positive electrode material, and the lithium ion migration path is shortened. After 100 times of charge-discharge cycles, the capacity retention ratio of the lithium ion battery can reach 86.9%, and the lithium ion battery shows excellent rate capability and cycling stability, and has great application prospects.

The invention discloses a preparation method and application of a homogeneous titanium-palladium alloy, and the preparation method comprises the following steps: putting sponge titanium and palladium-gold fragments into a vacuum induction melting furnace in melt quenching equipment according to the mass ratio of (96-98): (4-2) for rapid smelting, and then quenching into a titanium-palladium intermediate alloy with the thickness of 40-60 microns and the width of 5-10 mm under the protection of argon; crushing the titanium-palladium intermediate alloy into titanium-palladium intermediate alloy fragments with the same particle size as the sponge titanium; the method comprises the following steps: weighing sponge titanium and titanium-palladium intermediate alloy fragments according to a mass ratio of (8-9): (2-1), and physically and uniformly mixing; pressing the mixture into a blank block, namely the titanium-palladium electrode; smelting the titanium-palladium electrode in a vacuum consumable electrode furnace for multiple times to obtain a titanium-palladium alloy ingot; and carrying out homogenizing annealing treatment on the titanium-palladium alloy ingot in a vacuum annealing furnace to obtain the titanium-palladium alloy. According to the method, the content and uniformity of the Pd element in the Ti-Pd alloy can be accurately controlled, and the homogeneous titanium-palladium alloy free of segregation and inclusion metallurgical defects is prepared.

The invention discloses a femtosecond laser etched quantum dot glass preparation method and anti-counterfeiting application, and belongs to the technical field of quantum dot luminescent materials and laser micromachining. According to the glass material, precursor glass is prepared through a melting quenching method, then femtosecond laser direct writing etching and subsequent heat treatment are conducted, femtosecond laser is used for etching the glass, and a high-resolution patterned light-emitting structure can be achieved on the surface of the glass. After fluorescence quenching of the pattern in an air environment, fluorescence recovery can be achieved through low-temperature annealing (300 DEG C), and the reversible encryption-decryption function is achieved. The perovskite quantum dot solves the problems of poor environmental stability and difficult patterning processing of the traditional perovskite quantum dot, and is suitable for the fields of optical storage, anti-counterfeiting marks, reconfigurable photoelectric devices and the like.

The application discloses a highly restructured Ni-doped glassy MOFs electrocatalyst and a preparation method and application thereof, a solution containing a cobalt salt and an organic ligand is subjected to a hydrothermal reaction to obtain ZIF-Co powder; the mixture of the ZIF-Co powder and a nickel source is used as a powder precursor; the powder precursor is loaded on an electrode material to obtain an electrode material loaded with the catalyst; and the electrode material loaded with the catalyst is subjected to glassification through a melt quenching technology, and then is restructured to obtain the highly restructured Ni-doped glassy MOFs electrocatalyst. The application promotes electrochemical surface restructuring by using the glassification, and obtains the glassy MOFs catalyst with rich active sites, thereby solving the problem that the active sites of the MOFs material are not easy to expose. In addition, the glassy MOFs can be directly fused and attached on the electrode material without a binder, thereby solving the problem that the powder catalyst is difficult to process, and facilitating device assembly and industrial scale production.

The invention relates to a luminescent phosphate fluorescent glass ceramic capable of rapidly responding to radiation dose detection and a preparation method and application thereof.The luminescent phosphate fluorescent glass ceramic is prepared from Na2CO3, BaCO3, NH4H2PO4 and H3BO3 through mixed grinding, calcination, melting quenching, grinding, compression molding, heat treatment and cooling, Dy < 3 + > is doped in a glass ceramic matrix in the form of a compound, and the Dy < 3 + > ion doped NaBaPO4 glass ceramic is obtained. Cold white light is emitted under the excitation of a specific excitation wavelength, through experiments and calculation, the sample contains three shallow trap energy levels with different depths, the characteristic endows the sample with remarkable rapid response performance, and charge carriers can be rapidly released in the optical excitation reading process, so that shorter signal reading time and rapid bleaching capability are realized, and the sensitivity of the sample is improved. And good linear dose response to high-energy rays in a range of 0.1-200 Gy is realized. The fluorescent material has good white light luminescence characteristic, rapid response characteristic, wide radiation dose response performance and good reusability, and can be applied to the field of luminescence and radiation dose detection as a novel fluorescent material.

The application discloses a fluorozinc-aluminum-based glass ceramic containing ZnF2 crystal phase, and the molar percentage of raw material components is as follows: ZnF2 25-35mol%, BaF2 10-20mol%, YF3 10-20mol%, SrF2 5-15mol%, AlF3 25-35mol%, and ErF3 0-10mol%. The application further discloses a preparation method of the fluorozinc-aluminum-based glass ceramic containing ZnF2 crystal phase, wherein the fluorozinc-aluminum-based glass ceramic containing ZnF2 crystal phase is obtained by using a melting quenching method to obtain a precursor fluorozinc-aluminum-based glass, and then is prepared by using a heat treatment method. The fluorozinc-aluminum-based glass ceramic containing single ZnF2 crystal phase has obvious up-conversion and mid-infrared light emission enhancement effect compared with the base glass, and can be applied to the fields of optical fiber / glass lighting display and high-power mid-infrared fiber laser.

This invention provides an amorphous vanadium-based cathode material, its preparation method, and its applications. The amorphous vanadium-based cathode material comprises active material glass powder, wherein the active material glass powder uses vanadium pentoxide as the active precursor, manganese dioxide as the structural stabilizer, sodium tetraborate decahydrate as the glass network former, lithium carbonate as the lithium source and network modifier, and thiourea as the reducing agent and nitrogen and sulfur doping source. The process employs melt quenching combined with thermoelectric coupling field crystallization, which is simple, low-cost, and suitable for large-scale production. Lithium-ion batteries assembled with this amorphous cathode material have advantages such as high specific capacity, excellent rate performance, and long cycle life.

The present invention discloses a FeCoNiBPt high entropy amorphous alloy water electrolysis catalytic material and a preparation method thereof. The material has a chemical formula of (Fe a Co b Ni c B d ) 100‑ x Pt x , where 25≤a, b, c≤30, 10≤d≤25, and 0≤x≤5. The preparation method comprises the following steps: preparing the ingredients according to the molar percentage of each atom and smelting the master alloy, preparing a high-entropy amorphous alloy strip by melt quenching, and then subjecting the catalytic material to electrochemical dealloying treatment. The present invention can be used as a bifunctional catalytic material for complete water splitting in an alkaline electrolyte and exhibits excellent hydrogen evolution reaction activity across the entire pH range. The method of the present invention can in situ generate nanoporous and defect-rich nanocrystalline structures, exposing abundant active sites to enhance catalytic performance. The method is self-supporting, low-cost, and highly stable, allowing for mass production.

The invention discloses a core-shell type bifunctional electrocatalyst with a crystalline amorphous interface and a preparation method and application thereof, the preparation method comprises the following steps: loading ZIF-Co powder on CuO nanorods, and then carrying out vitrification through a melting quenching method to obtain the core-shell type bifunctional electrocatalyst with the crystalline amorphous interface. According to the preparation method, amorphous ZIF-Co is uniformly molten and coated on the surface of CuO by utilizing a vitrification technology, so that the core-shell type electrocatalyst with a crystalline amorphous compact nano interface is obtained, and the generation of more active sites is remarkably promoted. The material is a bifunctional catalyst with excellent performance and long-term stability, and is applied to anode electrooxidation of 5-hydroxymethylfurfural and cathode electrocatalytic hydrogen production. And the preparation method is simple, the price is low, the glassy material can be directly fused and attached to the electrode material without a binder, and device assembly and industrial large-scale production are facilitated.

The present invention relates to solid materials obtainable by melt quenching a mixture of lithium sulfide, boron sulfide, boron oxide and Se, Te, In or a combination thereof, thereby forming a glassy solid suitable for use in electrochemical cells, for example as a lithium ion and electron conductive coating, and exhibiting high thermal stability.

According to the preparation method of the permanent magnet alloy with the high-entropy effect and the stable ThMn12 structure, the permanent magnet alloy with the high-entropy effect and the stable ThMn12 structure is prepared through the steps of proportioning of Sm, RE1, RE2 and RE3 elementary substances, electric arc melting, melt rapid quenching and heat treatment. According to the invention, multi-component rare earth elements are co-doped in the ThMn12 type SmFe12-based permanent magnet material to obtain the SmFe12-based permanent magnet alloy with relatively high thermal stability, and magnetic moment reduction and secondary phase generation caused by doping of traditional stable elements titanium and vanadium are overcome, so that degradation of magnetic performance of the permanent magnet alloy is avoided, and a new idea is provided for development of the ThMn12 type SmFe12-based permanent magnet material. The stability of the 1: 12 phase can be improved through the high-entropy effect of the multi-component rare earth element, and the prepared ThMn12 type nanocrystalline permanent magnet alloy has high intrinsic magnetic performance, low cost and simple and convenient process.

Pr2Fe, a rare-earth permanent magnet material that can reduce the harm of residual carbon 14 A method for improving the phase stability of C relates to the field of permanent magnet materials technology. It consists of a substance with the following stoichiometric ratio: (Pr,RE)₂Fe 14 C; where RE = Sm, Gd; the preparation process includes batching, smelting, rapid melt quenching, and annealing. Rapid melt quenching is performed in a vacuum rapid quenching furnace with a copper roller speed of 20 ≤ V ≤ 40 m / s under a protective atmosphere. Annealing is performed in an annealing furnace at 500–1100°C under a protective atmosphere. In this invention, Sm₂Fe 14 C and Gd2Fe 14 The high stability of the C phase is achieved by replacing Pr₂Fe with Sm and Gd atoms. 14 Some Pr atoms in C extend Pr2Fe 14 In the stable region of the C phase, pure phase (Pr,RE)2Fe was prepared. 14 Type C rare earth permanent magnet material.