44 results about "Wet chemistry" patented technology

The invention provides a TEM sample and a preparation method and application thereof.According to the preparation method of the TEM sample, on the premise that the hole structure of a semiconductor device is not affected, part of residual polymer accumulated and blocked in a hole opening in the semiconductor device is removed through reactive ion etching, so that the hole opening is expanded and not blocked any more; a protective colloid can enter a pore structure for filling and precursor material plating of atomic layer deposition is facilitated, the definition of the side wall of the pore is enhanced, and the quality and the final observation effect of the TEM sample are effectively improved; the equipment and technology adopted by the preparation method of the TEM sample provided by the invention are low in investment, and the operation process is simpler and faster than that of a Fab etching process; meanwhile, batch laboratory-scale sample treatment can also be realized; in addition, compared with a wet chemical corrosion cleaning technology for removing residual polymers, the problems of chemical reagent residues, chemical reactant pollution and the like at the bottom of the deep hole structure are avoided.

The invention provides a Fe-Co-Ni series nano-alloy and a preparation method and application thereof, and belongs to the technical field of functional materials. The alloy is prepared by the following steps of: weighing and proportioning 0.5 mmol of each element by taking chlorate or acetylacetonate or acetate of iron, cobalt, nickel, manganese, copper, zinc and the like with the purity of more than 99.5% and other metal chlorides which are rich in earth surface and economical and practical as precursors, putting the precursors into a pressure-resistant bottle, taking n-trioctylphosphine oxide (TOPO) as a ligand, taking ethanol and 1-octadecene (ODE) as a mixed solvent, and uniformly stirring to prepare the alloy. And synthesizing the hexagonal nano-alloy at low temperature by using a wet chemical method. The method can be used for synthesizing 3-10-element medium-entropy and high-entropy alloy, and has a wide application prospect. The synthesis is a precise process which is guided by an organic ligand, is coordinated by multiple metals and is subjected to nucleation-self-assembly-anisotropic growth.

An apparatus for non-immersive wet-chemical treatment of a surface of a workpiece (2) comprises: a holding device (7) for holding the workpiece (2) with the surface in a predominantly upright orientation; a liquid application system (5) for flowing liquid (6) across the surface of the workpiece (2), when held by the holding device (7), as a film flowing in a predominantly downwards direction; a receptacle (4) for collecting liquid (9) that has flowed across and detached itself from the surface; and a system (11,12,16,18-20,22,24) for recirculating liquid collected in the receptacle (4) to the liquid application system (5). The system (11,12,16,18-20,22,24) for recirculating liquid comprises a device (22,23) for introducing sparging gas (21) into the liquid.

The invention relates to the technical field of luminescent materials, discloses a mechanoluminescent material as well as a preparation method and application thereof, and aims to solve the problems of difficulty in controlling the valence state of copper ions, complexity in treating flux residues and difficulty in balancing process parameters in the preparation of the existing mechanoluminescent material. The preparation method of the mechanoluminescent material comprises the following steps: synthesizing a copper-doped zinc sulfide nanocrystal precursor by adopting a wet chemical method, and carrying out annealing treatment by sublimed sulfur in-situ generation of a sulfur-rich reducing atmosphere in combination with a non-traditional fluxing agent. By adopting the technical scheme, the valence state of the copper ions can be accurately controlled, the post-treatment process is simplified, and the luminous efficiency, the stability and the batch consistency are improved.

The present application provides a ginseng quality nondestructive evaluation method based on hyperspectral and X-ray technology, belongs to the field of spectral analysis technology, and comprises the following steps: collecting information of a complete ginseng sample by using hyperspectral and X-ray technology, and integrating complementary information from the two devices by a modeling method of ensemble learning. The present application provides a fast, nondestructive and accurate ginseng quality evaluation method, and solves the problems of low accuracy of experience identification analysis, complex and time-consuming pretreatment of wet chemical analysis method, and difficulty in adapting to batch rapid detection due to sample crushing treatment of near-infrared spectral analysis technology.

The present invention discloses an online quantitative mixing system for wet chemicals suitable for the new materials industry, which relates to the field of chemical mixing technology, including a formula calculation and raw material preparation module, an initial addition and mixing control module, a feature extraction and data analysis module, a change classification module, a normal change processing module, an obvious change adjustment module and an insignificant change adjustment module; the formula calculation and raw material preparation module prepares various chemicals according to a pre-set formula and stores them in different raw material tanks. The present invention, by combining a machine learning model, predicts and adjusts the changes of chemical reagents in real time, and flexibly responds to different changes in the mixing process. When there is a significant change, the addition amount is reduced, and when the change is not obvious, the addition amount is increased. Under normal circumstances, the initial trace amount is maintained, thereby improving the mixing accuracy and efficiency, avoiding violent reactions and delays, reducing energy and time costs, and optimizing production efficiency and product quality control.

The invention discloses a tungsten-rhenium alloy preparation method for controlling the size of a second phase, and belongs to the technical field of medical CT machine anode target material preparation. W-10wt% Re-x Al2O3 precursor powder is synthesized by adopting a wet chemical method, wherein the content of Al2O3 is realized by regulating and controlling the addition amount of aluminum nitrate pentahydrate in the precursor. And the precursor powder is subjected to reduction treatment through a tubular furnace, and alloy powder is obtained. And then, powder densification is achieved through SPS sintering, and then the overall performance of the block is improved through rolling. According to the method, the influence of the content of the second phase (Al2O3) on the alloy performance and the influence of different processes on the size of the second phase are explored, and the purpose is to determine the optimal content interval so as to meet the strict working condition requirement of the medical CT machine target material. According to the method, an effective way for preparing the high-performance W-10wt% Re alloy by combining SPS and second phase introduction is determined through experiments, and the way has the advantages of process simplification and microscopic structure regulation and control.

This invention discloses an online monitoring method and device for the content of gaseous peroxides in ambient air. Based on a wet chemical method of gas diffusion absorption trapping and fluorescence spectroscopy detection technology, this invention uses a multi-turn wound non-metallic tube trap for sampling. The absorbent forms a liquid film on the tube wall, and the gaseous components to be measured diffuse and transfer mass at the gas-liquid interface. After sufficient contact and absorption with the absorbent, gas-liquid separation is achieved at the other end of the trap. Using p-hydroxyphenylacetic acid as a peroxide derivative, a fluorescent dimer is generated under the catalysis of heme chloride. This dimer fluoresces under characteristic wavelength light irradiation. The fluorescence intensity is measured using a flow cuvette and a photomultiplier tube, and the peroxide content of the gaseous components is calculated. The corresponding online monitoring device of this invention uses a multi-channel peristaltic pump for precise control of trace solutions, reducing daily maintenance. It can be applied to the rapid, online, and continuous measurement of gaseous peroxides in various environmental environments.

The invention discloses a photochemical controllable deposition method based on copper-silver bimetallic nanoparticles, and relates to the technical field of nano material preparation, and the photochemical controllable deposition method comprises the following steps: constructing a light excitation-molecular conformation regulation-acoustic streaming diffusion three-dimensional coupling system by utilizing the cooperative regulation of a light response biomolecule dynamic template and an acoustic oscillation microbubble field; the photoresponse biomolecule dynamic template is used for regulating and controlling an atomic-scale interface structure, and the acoustic oscillation microbubble field is used for homogenizing a metal ion diffusion environment; through excitation of dual-wavelength circularly polarized light, silver core formation, copper atom spiral deposition and three-dimensional nanowire array assembly are realized in sequence; in the invention, through cooperation of the photoresponse template and the acoustic microbubble field and excitation of dual-wavelength circularly polarized light, the problems of heavy pollution, difficulty in interface regulation and control and photodeposition three-dimensional construction bottleneck of a traditional wet chemical method are solved, and atomic order of a bimetallic interface, improvement of deposition uniformity and controllable assembly of the vertical alignment nanowire array are realized; and the method has the green process advantages of low pollution and no strict template removal.

The invention relates to the field of materials, and discloses a surface wave-shaped gold nanocrystalline material and a preparation method and application thereof.The preparation method comprises the steps that a chloroauric acid solution A1, a sodium hydroxide solution B1 and a solution C1 containing a first ligand react to obtain a first solution; the first ligand is selected from more than one of nitrite, citrate, sulfite and hypophosphite; a solution 1 containing a second ligand, a solution 2 containing a nanocrystalline template and a reducing agent solution 3 are mixed to obtain a mixed solution 4, the solution I is added into the mixed solution 4 to obtain a solution II, and the second ligand is selected from one or more of polyvinylpyrrolidone and poly (diallyldimethylammonium chloride) heat exchange sodium dodecyl benzene sulfonate; and mediating a mediating agent into the solution II to obtain the gold nanocrystalline material with the wavy surface. According to the method, the gold nanocrystals are synthesized in a water phase at normal temperature and normal pressure by adopting a wet chemical method, the surfaces of the prepared gold nanocrystals are wavy, and the roughness is continuously adjustable.

The invention discloses a simple wet chemical method for growing an ultra-fine platinum ultra-long nanowire in a solution phase. The length of the ultra-fine platinum ultra-long nanowire can be up to about 1 [mu] m. Compared with a traditional synthesis method, the method has the advantages that the operation and experiment conditions are simple, and the length of the platinum nanowire can be regulated and controlled on silica in a solution phase by adjusting the reaction time; meanwhile, the density of the platinum nanowires can be controlled by changing the concentration of the silane coupling agent and different seed dilution multiples, and the platinum nanowires with different surface roughness can be obtained by changing the ligand concentration. Besides, the nanowire can also be directly loaded on a conductive substrate, so that the one-dimensional platinum nanowire can be directly used as a working electrode subsequently, and great application potential is provided for the fields of electro-catalysis and the like. The method is simple in process, mild in reaction condition and low in cost, and the nano material synthesized by the electro-deposition method has the advantages of being accurate and controllable, simple and convenient to operate and environment-friendly.

The invention relates to an optical device configured for measuring fluorescence and absorbance in immunoassays and wet chemistry, comprising:-an illuminator channel (26) comprising at least one excitation source (28),-a detector channel (34) comprising at least one sensor (36),-a cuvette (130) comprising a sample (132) between the illuminator channel (26) and the detector channel (34), -an optical light mixer (38) between the illuminator channel (26) and the cuvette (130) and an optical splitter (40) between the cuvette (130) and the detector channel (34).

This invention discloses a rapid detection method for protein in feed based on wet chemistry. The method includes the following steps: (1) mixing the feed sample with the sample extraction buffer, shaking to extract, centrifuging, and taking the supernatant; (2) adding the working solution of the protein standard and the supernatant to the diquinoline formic acid working solution, incubating, and measuring the absorbance value at a wavelength of 562 nm using an ELISA reader to obtain the absorbance values ​​of the protein standard and the supernatant; plotting a standard curve with the concentration of the protein standard as the abscissa and the absorbance value as the ordinate, and obtaining a linear regression equation; substituting the absorbance value of the supernatant into the linear regression equation to calculate the protein concentration in the supernatant, and then calculating the protein content in the feed sample based on the extraction buffer volume in step (1). This invention achieves a high degree of consistency between the detection results and the Kjeldahl nitrogen determination method, while significantly shortening the detection time of a single sample to less than 1 hour.

This invention provides a TEM sample, its preparation method, and its application. The TEM sample preparation method provided by this invention, without affecting the pore structure of the semiconductor device, first uses reactive ion etching to remove some residual polymer deposits blocking the pore openings on the semiconductor device. This enlarges the pore openings, preventing blockage and facilitating the entry of colloidal materials into the pore structure for filling and the deposition of precursor materials for atomic layer deposition. This enhances the clarity of the pore sidewalls, effectively improving the quality of the TEM sample and the final observation results. Furthermore, the TEM sample preparation method provided by this invention requires less equipment and technical investment, and the operation process is simpler and faster than Fab etching. It also enables batch laboratory-scale sample processing. In addition, compared to wet chemical etching cleaning techniques for removing residual polymers, it avoids problems such as chemical reagent residues at the bottom of deep pore structures and chemical reactant contamination.

The invention relates to a design method of a crystal / amorphous heterostructure hydrogen-resistant isotope coating. The method comprises the following steps: preparing a crystal coating by adopting a wet chemical method; preparing an amorphous coating by adopting a wet chemical method; and performing heat treatment on the crystal / amorphous heterostructure. Through reasonable selection of the crystal layer and the amorphous layer, a crystal / amorphous heterogeneous interface is formed between the two-phase coating (such as Cr2O3 / Al2O3, ZrO2 / SiO2 and Er2O3 / Al2O3), the heterogeneous interface becomes a'hydrogen isotope capture trap ', the hydrogen resistance of the coating is remarkably superior to simple superposition of the performance of a single crystal or amorphous coating, and' 1 + 1gt; and 2, the technical breakthrough provides an efficient hydrogen blocking scheme for the problem of diffusion and permeation of hydrogen isotopes of metal materials in hydrogen-containing environments such as nuclear energy and hydrogen energy, and has important significance for realizing commercial application of nuclear energy and hydrogen energy.

The invention relates to the technical field of chlorosilane trace phosphorus detection, in particular to an electronic-grade chlorosilane trace phosphorus online detection method and system based on gas phase enrichment, and the method comprises the following steps: converting a liquid chlorosilane sample into chlorosilane steam flow; carrying out selective enrichment on the chlorosilane steam flow, separating phosphorus impurities from chlorosilane groups by utilizing the property difference between the phosphorus impurities and the chlorosilane groups, and selectively retaining and enriching the phosphorus impurities; desorbing the enriched phosphorus impurities, and sending the phosphorus impurities into an excitation source for excitation to obtain a phosphorus characteristic signal; determining the concentration of phosphorus impurities in the chlorosilane sample based on the phosphorus characteristic signal; the process of gas phase sample introduction, selective adsorption enrichment, rapid thermal desorption and direct excitation detection is adopted, so that the necessary wet chemical treatment links such as sample hydrolysis and digestion in the traditional off-line method are avoided, and exogenous pollution introduction, target phosphorus element volatilization loss and analysis delay caused by the wet chemical treatment links are eliminated; and rapid online monitoring of the chlorosilane in the process pipeline is realized.

The application relates to the technical field of hexagonal MBenes material preparation, in particular to a two-dimensional hexagonal transition metal boride h-MBenes material, a preparation method and application thereof. The molecular formula of the h-MBenes material is Hf x B y T z (T=H, O, F, Cl or OH), the h-MBenes phase material has a hexagonal crystal structure and is formed by alternately stacking transition metal hafnium layers and graphene-like boron layers, and the h-MBenes phase material is easy to be functionalized. The hexagonal ternary layered transition metal boride h-MAB phase material is used as raw material, the hexagonal ternary layered transition metal boride h-MAB phase material is etched by using a wet chemical method or a molten salt method, and a two-dimensional hexagonal transition metal boride h-MBenes material is obtained, the method is simple and effective, the raw material is easy to obtain and low in price, and the method has important industrial application prospects. The application also discloses possible applications of the h-MAB phase for preparing the h-MBenes material, and the results show that the h-MBenes material has good conductivity and excellent electrochemical performance.

The invention discloses a bimetallic plasmon nano gap cavity structure for enhancing up-conversion luminescence and a preparation method and application thereof, and belongs to the technical field of nano photonics, plasmon and luminescent materials. In order to solve the problems that the local electric field enhancement of a single metal particle is weak, the LSPR peak position tuning is narrow, a complex metal array is difficult to prepare, and the microcosmic essence is difficult to reveal by an averaging effect brought by macroscopic ensemble research, a metal-insulator-metal sandwich structure is constructed and comprises a substrate, a silver micron sheet, up-conversion nanoparticles and a gold nano bipyramid from bottom to top; by flexibly tuning spectral resonance, excitation absorption and radiation attenuation dual-mode enhancement can be selectively realized for a specific light-emitting channel. The structure can be prepared through a wet chemical method and a self-assembly process, has the advantages of being simple and convenient in preparation method, high in repeatability, good in structural consistency and the like, can be used for researching a horizontal mechanism of a single nanocavity, and has application potential in the fields of biological imaging, optical anti-counterfeiting, micro-nano photonic devices and the like.

The invention discloses a method for preparing high-entropy gamma-ray shielding filler based on a mixed salt reduction method, and belongs to the technical field of shielding materials. The invention provides a controllable wet chemical synthesis strategy aiming at the problems of high cost, complex preparation process and non-uniform component distribution of the existing filler. The method comprises the following steps: dissolving various metal salts in a solvent according to a target molar ratio, generating a precursor in situ in pores of expanded graphite by combining a coprecipitation-liquid phase reduction synergistic strategy, then adding a reducing agent, carrying out a reduction reaction and desorption in an inert atmosphere to generate high-entropy alloy particles, and then carrying out heat treatment to obtain the high-entropy gamma-ray shielding filler. The method has the advantages that uniform compounding of multiple elements is achieved in one step, and high energy consumption and composition segregation of a traditional method are avoided; the high-entropy effect is combined with elements to synergistically enhance the gamma-ray shielding efficiency; the solvent can be recycled, and material components can be flexibly designed by adjusting salt types. The invention provides an innovative solution for large-scale production and performance optimization of the high-entropy shielding filler.

The application discloses a kind of quick detection method and system of impurity-containing platinum rhodium alloy composition content, belong to precious metal component detection technical field.It includes: obtaining the platinum rhodium alloy sample to be detected, using gas specific gravity bottle method to carry out density detection to sample, using spectrometer to carry out component detection to sample, obtain the impurity element content in sample, by calculating and comparing the rhodium amount of output sample.The rhodium amount in platinum rhodium alloy is measured by the way of combining spectral analysis and gas specific gravity bottle method density detection, the detection time of ICP or wet chemical method is reduced from several hours to several days to within 1 hour, greatly improve efficiency, reduce detection loss and cost at the same time.The method has very high precision and can effectively exclude the interference of impurities and defects on measurement results.

The invention provides a molecule-based two-dimensional room-temperature ferromagnet, a preparation method thereof and an electronic device comprising the molecule-based two-dimensional room-temperature ferromagnet. The preparation method of the molecule-based two-dimensional room-temperature ferromagnet comprises the following steps: carrying out intercalation treatment by taking cobaltocene as an intercalation object and a layered material as an intercalation subject. Under the wet chemical reaction condition, the layered material serves as an intercalation subject, cobaltocene serves as an intercalation object, magnetic cobaltocene molecules are inserted into Van der Waals interlayer space of the layered material, the molecules can be subjected to confinement assembly, and therefore the two-dimensional room-temperature ferromagnet originating in molecular magnetism is obtained. The method provided by the invention is simple in condition process, high in yield, intact in structure preservation, excellent in performance and good in atmospheric stability, and is suitable for ferromagnetic functionalization of small molecules and application fields of the small molecules in electronic devices, optoelectronic devices, spintronics devices and the like. Experimental results show that in the material provided by the invention, cobaltocene molecules can be assembled in order in a two-dimensional Van der Waals confinement space, and the material has room-temperature ferromagnetism.

The application provides a preparation method and application of a spatial type surface enhanced Raman probe, and belongs to the technical field of preparation of the surface enhanced Raman probe. The hot spot of the probe takes a dielectric material-metal combination as a core, takes cetyltrimethylammonium bromide (CTAB) as a hard template on the surface of the core, synthesizes a mesoporous silica layer through one-pot wet chemical method, realizes a double-layer spatial type structure by chemical plating of metal particles on the surface again, the number of layers of the structure can be adjusted, the preparation of a more efficient 'hot spot' is realized, and the prepared enhanced Raman probe can be used for trace detection of cannabinoids.

The disclosure relates to a system for a wet chemical treatment of a substrate surface and a method for a wet chemical treatment of a substrate surface. The system for a wet chemical treatment of a substrate surface comprises a radiation source configured to provide a first electromagnetic radiation. The system further comprises a distribution body comprising at least jet holes, wherein the jet holes are configured to distribute a wet chemical relative to the substrate surface. The system further comprises at least a wave-guide module, wherein the wave-guide module is configured to guide the first radiation from the radiation source through the distribution body. The system further comprises a sensor element configured to detect a second radiation, which is the reflection of the first radiation at the substrate surface. The wave-guide module is further configured to guide also the second radiation through the distribution body and to the sensor.

Method for the production of an organic light-emitting device (100) comprising the steps: A) Providing a substrate (1), B) Applying a first electrode (2) to the substrate (1), C) Application of at least one organic functional layer stack (5) designed to emit radiation and arranged at least above the first electrode (2), D) Applying a second electrode (6) over the organic functional layer stack (5), and E) Application of perhydropolysilazane (4) by wet chemical processes and curing of perhydropolysilazane (4) to produce at least one planarization layer (3) arranged between the first electrode (2) and the substrate (1), wherein a layer structure with at least one layer pair (10) is produced, wherein each layer pair (10) is formed from the planarization layer (3) and a layer (9) produced by atomic layer deposition or chemical vapor deposition, wherein the layer (9) produced by atomic layer deposition or chemical vapor deposition completely surrounds both the surface and the side faces of the planarization layer (3), wherein at least one layer pair (10) is followed by a further planarization layer (31), wherein the further planarization layer (31) surrounds both the side faces and the surfaces of the layer (9) produced by atomic layer deposition or chemical vapor deposition in a form-fitting and material-bonded manner, and wherein the first electrode (2) and metallizations (8) are arranged above the planarization layer (3).

The invention discloses a high-entropy MXene material, a preparation method and application in an SERS (Surface Enhanced Raman Scattering) substrate, and relates to the technical field of functional materials. The method comprises the following steps: adding high-entropy MAX phase raw material powder into a mixed solution containing LiF and HCl, carrying out chemical etching, and centrifuging to obtain a precipitate; repeatedly washing the precipitate until the pH value of the supernatant is 6-7, dispersing the precipitate in deionized water, and carrying out ultrasonic treatment to obtain a high-entropy MXene solution; and centrifuging the high-entropy MXene solution, and collecting an upper-layer solution to obtain a single-layer high-entropy MXene colloidal solution which is used as the high-entropy MXene material. According to the preparation method, a mild wet chemical etching process is adopted to prepare a high-yield single-layer high-entropy MXene colloidal solution, and the high-yield single-layer high-entropy MXene colloidal solution is dispensed on the glass substrate, so that a solution is provided for constructing a stable and sensitive MXene-based SERS substrate.

The invention provides a wet chemical synthesis method of nickel diselenide nanoparticles for a supercapacitor, which mainly comprises the following steps: (1) slurry preparation: in a glove box filled with argon, dissolving 0.4 mM of Ni (acac) 2 and 8mM of Se powder in a bottle containing 30mL of OAm and 3mL of DDT, stirring at 50 DEG C for 1 hour, and then filtering through a 0.2 mu m filter to obtain precursor slurry; (2) heating reaction: placing 10mL of the precursor solution and 60mL of OAm in a 150mL three-necked flask, carrying out vacuum treatment at 60 DEG C for 30 minutes, then heating to 220 DEG C at a rate of 5 DEG C / min in an Ar atmosphere, reacting for 20 minutes, and then rapidly cooling the solution to room temperature; and (3) washing and drying: mixing the solution with 60mL of chloroform, centrifuging at 8000rpm for 5 minutes, repeating the centrifugal washing process for 3 times, and drying in vacuum at 60 DEG C for 12 hours. The nickel diselenide nanoparticles prepared by the method are uniform in morphology, have excellent supercapacitor properties, and solve the technical problems of low specific capacitance and poor long-term stability when transition metal is used as a supercapacitor.

The invention provides a preparation method of a symmetric broken gold nanocrystal with a controllable length-diameter ratio based on microwave-assisted ultrafast synthesis. According to the method, under the synergistic effect of a surfactant and a pre-synthesized gold seed, reaction conditions are accurately controlled through key parameters such as microwave radiation temperature, power and reaction time of a microwave reactor, and after the reaction is completed, the gold nanocrystal with good monodispersity and adjustable length-diameter ratio can be obtained through centrifugal purification. Compared with a traditional wet chemical synthesis process, the method has the advantages that the reaction time is greatly shortened to be within 1 hour; by utilizing the characteristics of instantaneity and uniformity of microwave heating, the high uniformity of the nanocrystal size is realized; by regulating and controlling the type and the concentration of the surface active agent, the regulation and control of the symmetrical broken morphology of the gold nanocrystal can be realized; the length-diameter ratio of the gold nanocrystals can be directly controlled by accurately regulating and controlling the microwave temperature, the method is easy to operate and good in repeatability, and a novel efficient and controllable preparation way is provided for application of functional precious metal nanomaterials.

This document describes wet chemical etching systems designed to apply etching chemistry to a substrate's surface. The system, in some examples, includes a rotor that grips and rotates the substrate, in conjunction with a weir that forms a crest of wet chemistry beneath it. As the substrate rotates, surface tension draws the wet chemistry onto its surface. The system may also include a controller that manages the substrate's movement through different positions.

The invention discloses a preparation method of an LSCF perovskite cathode material, which comprises the following steps: respectively mixing a La source, a Sr source, a Co source and a Fe source, adding a fluxing agent, uniformly stirring and mixing, and melting at 1600-1700 DEG C to obtain a melt; quickly pouring the melt into water for water quenching to obtain a water-quenched glass body; crushing and wet-grinding the water-quenched glass body to obtain precursor powder; carrying out heat treatment on the precursor powder: firstly, keeping the temperature at 800-900 DEG C in a weak oxidizing atmosphere; then switching to an oxygen atmosphere, and carrying out heat preservation at 1000-1100 DEG C; finally, switching to a weak reducing atmosphere, and carrying out heat preservation at 600-850 DEG C; carrying out wet grinding and drying on the powder subjected to heat treatment to obtain the LSCF perovskite cathode material; according to the method, the limitation of a traditional solid-phase reaction and a wet chemical method is broken through, and collaborative optimization of high activity, high stability and low-cost preparation of the LSCF cathode material is achieved.