34 results about "Laser power density" patented technology

The invention relates to the technical field of laser pipe cutting machining, and discloses a laser pipe cutting machine machining optimization method for small pipes. The method comprises the following steps: acquiring three-dimensional point cloud data of a to-be-processed pipe, and extracting a pipe axis direction vector and pipe wall thickness distribution data through geometric topology analysis; a dynamic machining coordinate system is established based on the axis direction vector, and the theoretical projection position of the laser focus in the coordinate system is calculated; material absorption characteristic parameters are matched according to the pipe wall thickness distribution data, and a laser power density gradient adjusting instruction is generated; monitoring the radial run-out amount in the rotating process of the pipe in real time, and generating a laser focus track compensation parameter in combination with a theoretical projection position; and finally, the laser power density gradient adjusting instruction and the focus track compensation parameters are fused to generate a cutting path control signal, and a laser cutting head is driven to complete machining. According to the method, the problems of insufficient precision and unstable quality in the machining process of small pipes are effectively solved, and the machining adaptability is improved.

The application provides a high-performance composite femtosecond laser processing variable cross-section hole forming precision control method, relates to the technical field of laser processing, and first discretizes a target hole into a plurality of processing layers along a depth direction, and establishes a Cartesian coordinate system; the effective radius of a spot and a projection area of each layer are calculated in combination with hole taper; on this basis, a reference power density decay model is constructed, a laser incidence angle is further introduced, and a mapping model between hole taper, laser incidence angle and laser power density is established. Finally, according to the target hole taper and the target removal efficiency, the laser incidence angle required by each processing layer is inversely solved, and the dynamic regulation and control of the rotary cutting head and the cradle turntable are realized accordingly. The method can realize layer-by-layer closed-loop control of the variable cross-section hole forming precision, effectively compensate for the laser power decay in the depth direction, and improve the precision of laser processing.

The invention relates to a real-time on-line ultrafast laser dielectric film damage threshold testing system, which belongs to the technical field of ultrafast laser, and comprises a forward Brillouin compression system for generating forward Stokes light and compressing and amplifying the forward Stokes light; the forward non-focusing SRS compression system is used for generating asymmetrically amplified and compressed laser to obtain high-energy short-pulse laser; the grating film damage threshold testing system is used for bearing the optical dielectric film, receiving the processed laser, enabling the laser passing through the interior to penetrate through a damage point of the optical dielectric film, and calculating a damage threshold according to the laser power density and the light spot area; the phase interference damage judgment system is used for carrying out real-time on-line damage judgment and quantification, generating interference fringes through two beams of light, quantifying the interference fringes and detecting the damage degree of the optical element thin film on line in real time; the method has the beneficial effects that the energy irradiated on the tested grating film sample is calculated according to the beam splitting ratio, and the grating film damage threshold value is calculated.

The invention belongs to the technical field of material surface treatment, and provides a TC4 alloy surface treatment method based on laser shock peening and laser metal deposition, and the method comprises two parts of preparation of a TC4 alloy material test piece and laser shock peening of the formed test piece. According to the surface treatment method for preparing the TC4 alloy material based on selective laser deposition, various properties of the surface of the TC4 alloy are improved in the mode of regulating and controlling the laser power density, the problem that residual stress is generated in the material in the process of preparing the TC4 alloy through laser metal deposition is solved in the mode of laser shock peening, and the quality of the TC4 alloy material is improved. Compared with the prior art, the method has the advantages that various properties of the material surface can be improved, residual tensile stress on the surface of a part can be reduced through plastic deformation generated in the impact process, the deformation resistance of a test piece is improved, and initiation, expansion and cracking of cracks of the part are inhibited.

This invention discloses a method for CO2 continuous laser cutting of CFRP material. The method employs a CO2 continuous laser engraving and cutting system to cut CFRP material. After adjusting the corresponding working parameters, a portion of the CFRP material to be cut is taken as a sample, and a rectangle is obtained through trial cutting. The diameters of the pits generated by the spot laser are measured horizontally and vertically twice, and the average diameter is calculated. Simultaneously, the continuous laser power density is calculated, and the height difference between the four corners and the center of the rectangle is measured to obtain the surface fluctuation value (Fv). Different scanning speeds, number of consecutive processing cycles, and Z-axis scale values ​​are selected, and trial cutting is repeated on the sample. When the measured Fv is at its minimum value, the thermal damage to the material is minimized. The scanning speed, number of consecutive processing cycles, and Z-axis scale value at this minimum value are used as the working parameters for cutting the CFRP material. This invention effectively controls the thermal damage to the CFRP material during processing and improves the processing effect of laser-processed CFRP material.

The invention relates to the technical field of laser control methods, and discloses a laser power density self-adaptive regulation and control method and system based on target features and distances, S1, a pre-calibration stage: calibrating the sizes and forms of light spots of a variable-focus beam expander under different target distances and different target features, establishing a mapping relation graph of the target distance, the target feature and the laser power density; s2, performing power-on self-test, entering a self-test mode after starting, performing detailed calibration on the sizes and forms of light spots of the variable-focus beam expander under different target distances and different target features through a pre-calibration stage, and establishing a mapping relation graph of the target distances, the target features and the laser power density, so that the target distance and the target features can be accurately determined according to the distance and the features of the current target; the mapping relation graph is inquired, the laser output power is adjusted according to the principle that the laser power density reaching the target is basically kept unchanged, and proper laser power output can be achieved under different distances for targets made of different materials.

The invention relates to a method for laser welding of components (10), comprising the following steps: providing at least two components (10), the components (10) being coated, the components being made of a high-strength metal; at least three laser spots (12) are produced on at least one surface (14) of at least one component (10), the laser spots (12) each having a core region (16) and a ring region (18), the average laser power density in the core region (16) being higher than the average laser power density in the ring region (18), and the laser spots (12) producing a common melt pool (20) in the component (10). The invention also relates to an assembly of at least two integrally bonded components (10) produced according to the method of this type.

The invention discloses a nanoparticle capturing method and related equipment, and the method comprises the following steps: uniformly covering a hydrogel solution on a sample liquid drop containing target nanoparticles on a glass slide to form a standard observation system; the hydrogel solution is temperature sensitive type hydrogel; determining a local area where the target nanoparticles are located in a standard observation system; starting a laser, controlling the laser to irradiate the local area, and regulating and controlling the laser power density of the laser, so that the temperature of the local area reaches and is maintained at the phase change temperature of the hydrogel solution; and adjusting laser parameters of the laser to generate stable hydrogel at the position of the target nanoparticle. According to the embodiment of the invention, the nano-particles can be captured by utilizing the characteristics of the temperature-sensitive hydrogel and combining a simple photo-thermal device, the influence caused by the limitation of capturing environment conditions or capturing sample properties is reduced, and the method can be widely applied to the technical field of nano-particle capturing.

The application provides a coating material and a laser cladding process for steam turbine blade water erosion resistance, and the mass percentage of each component of the coating material is as follows: C: 0.65-0.80wt%, Cr: 3.00-6.50wt%, Mn: 0.22-0.55wt%, Nb: 0.30-0.80wt%, Mo: 4.00-8.50wt%, Si: 0.1-0.3wt%, W: 5.00-8.00wt%, V: 1.50-2.50wt%, Al: 0.40-0.60wt%, and the balance is Fe and a small amount of impurity elements. The laser power density in the cladding process is 100-150W / mm 2 , argon is used to protect the molten pool, the powder feeding amount is 40-60r / min, and the multi-pass lap rate is 30-50%. The coating material provided by the application has the characteristics of high toughness, not easy to produce pores and excellent water erosion resistance. The cladding layer prepared from the coating material has high water erosion resistance and good comprehensive mechanical properties.

This invention provides a miniaturized high-pulse-energy Raman laser under vortex optical pumping conditions, relating to the field of Raman laser technology, and employing n 2 A square array of vortex phase plates serves as the optical element for generating vortex-pumped lasers. By adjusting parameters such as the topological charge of the array of vortex phase plates and the focal length of the array of short-focal-length lenses, the laser power density in the focal region is reduced. The focal region has n 2 A square array is arranged with ring-shaped light intensity distribution units, ensuring that the laser power density of each unit in the focal region is greater than the Raman laser generation threshold and less than the laser-induced breakdown threshold. Therefore, the total Raman laser energy is n times the Raman laser energy generated by each unit. 2 This technology ultimately enabled the output of high-energy, high-beam-quality Raman lasers, with Raman laser pulse energies reaching hundreds of millijoules or even joules.

The invention provides a pulse laser induced high-ionization magnetron sputtering and ion energy control method and device, and relates to the technical field of magnetron sputtering coating. The control method comprises the following steps: S1, mounting a target material and a substrate in place in a vacuum chamber, sealing the vacuum chamber, and vacuumizing the vacuum chamber to a vacuum state; s2, argon is introduced into the vacuum chamber, and the working air pressure is controlled to be stabilized at a preset value; turning on an anode power supply to supply power to the target material, and grounding the chamber wall of the vacuum chamber; s3, the surface of the target material is scanned according to a preset path after the pulse laser is controlled to be focused, secondary electron emission is excited, and the ionization rate of sputtering metal atoms in the plasma is increased; plasma density data are synchronously monitored in real time, and the laser power density is dynamically adjusted based on a preset plasma density threshold value; and S4, establishing an electric field, accelerating the positively charged target material ions to move towards the substrate under the action of the electric field, and depositing on the surface of the substrate to form a coating film.

The invention relates to the technical field of alloy materials, in particular to a Cr-Fe functional alloy material for prolonging the service life of a gun barrel and a preparation method thereof.The alloy comprises, by mass, 74%-78% of Cr, 22%-56% of Fe and 0.5%-1.2% of C. The microstructure is mainly composed of a BCC phase (larger than or equal to 85%), and Cr23C6 strengthening phases (3%-8% and 0.2-3.0 microns) are evenly separated out. During preparation, laser remelting is conducted on a pre-plated hard chromium base body under nitrogen protection, the laser power density is 4.95 * 10 < 4 >-9.20 * 10 < 4 > W / cm < 2 >, the scanning speed is 5-80 mm / s, preheating is conducted to 400 DEG C, and gradient cooling is conducted; the integrated visual system regulates and controls parameters in real time, the depth-to-width ratio of a molten pool is guaranteed to be 1: 1.5-1: 2.5, and the Cr / Fe distribution standard deviation is smaller than or equal to 5%. The interface dislocation density of the alloy is larger than or equal to 1 * 10 < 14 > m <-2 >, the high-temperature abrasion mass loss is smaller than or equal to 0.01 g, the abrasion resistance is three times that of original hard chromium, and the service life of a gun barrel is remarkably prolonged.

The invention relates to the technical field of additive manufacturing interface metallurgical bonding strength real-time improvement scheme design, in particular to a multi-material additive manufacturing interface metallurgical bonding strength real-time improvement method and system. The method comprises the following steps: synchronously capturing an interface thermal-mechanical coupling state through a multi-mode sensing system; calculating the solid solubility and the crack sensitivity coefficient based on a thermodynamic model; double-loop intelligent control is triggered, a feedforward module predicts an energy compensation strategy according to a material database and activates nano activated particles to intervene, and a feedback module adopts reinforcement learning to optimize energy parameters; and injecting functionalized nano-powder into the interface and accurately adjusting the laser power density to a critical value. The system comprises a multi-physical field sensing module, a real-time decision center and a microcell energy regulation and control unit. The method has the core advantages that a dynamic black box in the heterogeneous material interface metallurgy process is broken; the in-situ active regulation and control of the material compatibility are realized; precise adaptation of a micron-scale energy field is achieved. And the interface metallurgy quality and the member service reliability are obviously improved.

The present application provides a kind of optical fiber jumper, the optical fiber jumper includes optical fiber connector, light receiver, fixed cap, core, optical fiber coating and adhesive, the light receiver is placed in the optical fiber connector, the fixed cap is connected with the optical fiber connector, the core is inserted into the optical fiber connector and the light receiver, the adhesive is coated between the optical fiber connector and the optical fiber coating.Light receiver is not damaged by not absorbing laser, and the laser beam is uniformly transmitted for a distance therein, since the laser beam is divergent and the refractive index of the light receiver is gradually changed, the laser beam is irradiated to the optical fiber connector with a larger divergence angle, at this time, the laser power density is significantly reduced, so that the laser connector only generates heat, without damage.

The invention relates to the technical field of laser processing, and particularly discloses an aircraft frame beam fillet structure in-situ laser shock peening process method which comprises the following steps: obtaining an unshielded range in the incident direction of a laser beam according to the structural characteristics of a non-detachable frame beam and the spatial position characteristics of a fillet; the orientation relation between the incident direction of the laser beam and the rounded corner structure is established by combining the size characteristics of the non-shielding range and the rounded corner structure, and the optimal orientation of the incident direction of the laser beam is obtained; designing gradient laser power density; and the gradient light spot size is designed, and the optimal light spot size is obtained. Laser shock peening process parameters are designed on the basis of spatial structure characteristics and size structure characteristics of the aircraft frame beam fillet, so that interference of the spatial structure characteristics of the aircraft frame beam to laser beams is avoided, and meanwhile, a peening effect meeting fatigue gain requirements can be achieved on a fillet curved surface; therefore, a preferable implementation process with the best coordination of the fatigue gain effect and the strengthening processing mode is obtained.

The invention relates to the technical field of battery preparation, in particular to a preparation method of a miniature aluminum-air battery, which comprises the following steps: acquiring key parameters in real time; calculating a risk characterization index; abnormal judgment; determining an aluminum powder behavior state and a sintering behavior state, and identifying an activity non-uniform region; judging abnormal conduction to obtain material distribution deviation; conducting type judgment to obtain energy or interface deviation; adjusting laser power density or polarization voltage; and correcting the risk index according to the adjustment timestamp. According to the invention, real-time acquisition and correlation analysis of multi-source parameters are introduced in the whole process of battery preparation, so that whole-process dynamic monitoring and regulation from raw material behavior, forming state to interface reaction process are realized; the problems of low battery efficiency and short service life caused by unstable electrode performance due to non-uniform powder dispersion and inconsistent film thickness are effectively solved.

A method for the laser welding of two conductor pieces includes providing an elongated first conductor piece having a first end section and a first end face, and providing an elongated second conductor piece having a second end section and a second end face. The first end face is arranged adjacent to the second end face. The method further includes generating at least two laser spots on the first end face and / or the second end face. Each of the at least two laser spots has a core region and a ring region. An average laser power density in the core region is higher than an average laser power density in the ring region. The method further includes moving the at least two laser spots. The at least two laser spots generate a common melt pool that extends at least partially over the first end face and the second end face.

The application discloses a full-laser reversible CsPbI3 perovskite film fluorescent patterning method, wherein CsPbI3 perovskite film is prepared by using CsI, PbX2, OAI and a polymer; laser power density and exposure time are regulated to optimize processing conditions; the film is processed by using a femtosecond laser, ion diffusion and local recrystallization in the CsPbI3 perovskite film can be effectively induced, lattice distortion can be repaired, a regular and ordered lattice structure can be constructed, the defect state density of the CsPbI3 perovskite film can be reduced, and the carrier recombination mechanism can be changed from non-radiative recombination to radiative recombination. Meanwhile, the femtosecond laser can optimize the ultrafast carrier relaxation dynamics of the film, effectively slow down the carrier decay rate, significantly improve the carrier transport performance and radiative recombination ability, and finally realize the improvement of the CsPbI3 perovskite film fluorescence intensity by about 10 4 orders of magnitude.

The invention belongs to the field of laser testing, and provides an ultra-low retroreflection laser power testing device, which comprises a beam expanding system lens group; the beam expanding system lens group is configured to perform beam expanding on the high-power laser to be measured so as to reduce the laser power density; the wedge-shaped mirror is used for receiving the laser beam-expanded by the beam-expanding system mirror group and reflecting the laser with laser energy smaller than a preset value; the power meter receives the laser energy smaller than a preset value and calculates the laser power of the high-power laser to be measured based on the laser energy smaller than the preset value; the liquid medium attenuation absorber comprises a high-pressure sealing cavity and liquid arranged in the high-pressure sealing cavity, the wedge-shaped mirror serves as an incidence window and is arranged on one side of the high-pressure sealing cavity, and the liquid is configured to absorb laser energy transmitted by the wedge-shaped mirror. The stability, reliability and safety of the MOPA laser system in the testing process are improved, and accurate measurement of high-power CO2 laser in an EUV photoetching light source is achieved.

This application relates to the field of lidar technology and provides a laser emitting system and lidar. The laser emitting system includes a diverging laser unit, a first pre-collimation module, a processing module unit, and a second pre-collimation module arranged sequentially. The processing module unit includes a first processing unit and a second processing unit. The beam emitted by the diverging laser unit is split into a first beam and a second beam after passing through the first pre-collimation module. The first beam passes through the second processing unit and then directly passes through the second pre-collimation module. The second beam passes through the first processing unit and then sequentially passes through the second processing unit and the second pre-collimation module. The emission direction of the second beam is the same as that of the first beam. This application improves the laser emission power, increases the far-field laser power density, and merges the near-field spots of multiple LD chips into one, resulting in a high-brightness far-field spot.

This application provides a laser thermal coma effect simulation method and system, belonging to the field of laser thermal coma effect simulation technology, including the following steps: dividing the atmospheric space along the laser transmission path into a two-layer structure of macroscopic and microscopic grids; calculating the absorbed laser power density in each macroscopic grid cell based on the initial temperature field at the current moment, and transferring the laser power density in the macroscopic grid cell containing the activated microscopic grid to the corresponding microscopic grid; within the activated microscopic grid region, using the received laser power density as the heat source, solving the heat-fluid coupling equation system to obtain local temperature field data, and returning the local temperature field data to the macroscopic grid node through volume weighted averaging to update the temperature field at the current moment; based on the updated temperature field, using pre-determined spatial basis functions, obtaining the modal coefficients at the current moment through eigenorthogonal decomposition; achieving improved computational efficiency while ensuring physical accuracy.

This invention designs a laser rock-breaking cutting head, comprising a housing and an optical lens assembly. The optical lens assembly is disposed within the housing and includes a convex lens and an open-aperture concave lens. The convex lens and the open-aperture concave lens are arranged at a certain distance apart. A through hole is formed at the center of the open-aperture concave lens. After a conventional laser beam exits through the open-aperture concave lens, a distributed laser is generated, which includes a conventional laser beam passing directly through the through hole and a refracted beam generated by refraction through the solid area of ​​the concave lens. This invention also designs a laser-coupled TBM cutter head, wherein: the laser rock-breaking cutting head is mounted on the cutter head and positioned between adjacent roller cutters; the laser cutting machine main unit is mounted on the rear of the TBM; the stator of the beam transmission slip ring is fixed to the main frame, and the rotor of the beam transmission slip ring is fixed to the cutter head. This invention can fundamentally solve the problem of excessive glass glaze formation caused by the excessively high power density of conventional lasers, improve rock-breaking efficiency, and effectively shorten the construction cycle and reduce tool wear costs.

The application provides a diabetic foot rehabilitation physiotherapy device and method, wherein scattering interference caused by tissue exudate is compensated by distribution characteristics of the tissue exudate extracted from a physiotherapy image in a laser physiotherapy process, and a compensation image of the diabetic foot physiotherapy is obtained; laser absorption of laser energy at each position is determined according to optical structure characteristics in each local lesion area in the compensation image and brightness changes of each corresponding area in a contrast image; a plurality of physiotherapy areas are divided according to density accessibility of skin characteristics at each position in the physiotherapy image, and physiotherapy uniformity of each physiotherapy area is determined by all laser absorptions in each physiotherapy area; and laser irradiation parameters of each lesion area in the laser therapy are adjusted according to each physiotherapy uniformity of the diabetic foot surface of the patient and real-time laser power density. By using the scheme of the application, it can be ensured that the optical power density received by the skin of the patient at each position is uniform in the laser physiotherapy process.

The utility model belongs to the field of optical protection, and particularly relates to a laser shielding film which comprises a base material layer, one side of the base material layer is fixedly connected with a transition layer, and one side of the transition layer far away from the base material layer is fixedly connected with an electromagnetic wave absorption layer. The side, away from the transition layer, of the electromagnetic wave absorption layer is fixedly connected with a metal shielding net layer, the side, away from the electromagnetic wave absorption layer, of the metal shielding net layer is fixedly connected with a protective coating, and the side, away from the metal shielding net layer, of the protective coating is fixedly connected with a magnetic installation layer. And a hexagonal groove microstructure array is arranged on the surface of the electromagnetic wave absorption layer. According to the laser shielding film, through the synergistic effect of the hexagonal groove microstructure array and the copper-nickel alloy diamond meshes, the shielding efficiency on 1064nm laser is larger than or equal to 99.9%, the continuous laser power density can reach 1000W / cm < 2 >, and compared with a traditional single-layer shielding film (smaller than or equal to 500W / cm < 2 >), the performance of the laser shielding film is doubled.

The invention discloses a high-power rotating mirror laser cleaning process for derusting in the technical field of laser cleaning, which comprises the following steps: configuring a laser cleaning system which comprises a laser output unit with the output power not lower than 6kW and a rotating mirror scanning unit; the laser cleaning system is aligned with the rusted area on the surface of the carbon steel workpiece; identifying the corrosion grade of the corrosion area, and determining a corresponding target laser power density threshold value according to the identified corrosion grade; based on the target laser power density threshold value, setting laser power according to the diameter of a focusing light spot; according to the method, the advantages of high stability and large breadth of the high-power rotating mirror unit are combined with quantized process parameters, the problems that a traditional laser cleaning process depends on experience and is low in efficiency are solved, efficient, high-quality and repeatable cleaning of rust of the carbon steel component is achieved, and therefore the application range of the market is expanded.

The application discloses a CFRP defect detection method and system based on bidirectional scanning line laser thermal imaging, uses a line laser to perform bidirectional scanning on a material surface, collects temperature distribution of the material surface in a scanning process, and obtains an infrared image sequence; in the collected infrared image sequence, a local area at a rear side of a laser spot is selected as a cutting window, the cutting window is combined according to a spatial corresponding position to obtain a composite image of one-way scanning, a reference window is selected from the composite image, the composite image is corrected according to the spatial distribution of the line laser power density in the reference window, and a defect image of single scanning is obtained; and the defect images obtained by the forward and reverse scanning are superimposed to obtain an infrared image containing internal defect information of the material. The laser background noise interference is effectively reduced, the positioning of the defects is more accurate, and the image quality is improved.

The application provides a laser flexible transmission device for laser shock peening, and relates to the technical field of laser shock peening. The laser flexible transmission device for laser shock peening comprises a hard light path, an array light mirror arranged at the end of the hard light path, and the array light mirror is configured to reduce the pulse laser power density, a transmission optical fiber for transmitting the laser whose pulse laser power density is reduced by the array light mirror, and a reverse array light mirror arranged at the end of the transmission optical fiber. The application sets the array light mirror at the end of the hard light path, the array light mirror is used for reducing the pulse laser power density, the pulse laser with reduced power density is transmitted through the transmission optical fiber, the transmission optical fiber has good flexibility, operability and accessibility, and the internal structure can be conveniently subjected to laser shock peening, so that the convenience of structure repair is improved.

The application provides a high-performance composite femtosecond laser processing variable cross-section hole forming precision control method, relates to the technical field of laser processing, and first discretizes a target hole into a plurality of processing layers along a depth direction, and establishes a Cartesian coordinate system; the effective radius of a spot and a projection area of each layer are calculated in combination with hole taper; on this basis, a reference power density decay model is constructed, a laser incidence angle is further introduced, and a mapping model between hole taper, laser incidence angle and laser power density is established. Finally, according to the target hole taper and the target removal efficiency, the laser incidence angle required by each processing layer is inversely solved, and the dynamic regulation and control of the rotary cutting head and the cradle turntable are realized accordingly. The method can realize layer-by-layer closed-loop control of the variable cross-section hole forming precision, effectively compensate for the laser power decay in the depth direction, and improve the precision of laser processing.

The invention discloses a solar cell defect testing method, which aims at solving the problem that the existing area array PL detection cannot identify the related defects of broken grid, airflow printing and cell surface resistance abnormity, and adopts a line scanning PL bidirectional scanning combination scheme: firstly, scanning along a direction parallel to a fine grid with a laser power density greater than 1sun; scanning along the direction vertical to the fine grid at the laser power density of 1-10 sun; and collecting fluorescence signals through a line scanning camera, synthesizing a complete image, setting a + / -10% threshold value based on an average gray value G0 of a normal region, and judging the defect by combining the shape of a bright and dark region and the physical form matching of the defect. According to the method, the traditional defect detection capability is reserved, the broken gate and airflow mark detection function is added, and the detection comprehensiveness and accuracy are remarkably improved.

The invention discloses a selective patterned lithium manganese iron phosphate positive electrode material and a preparation method thereof, and belongs to the technical field of batteries. The preparation method comprises the following steps: preparing an LMFP precursor, pre-sintering the LMFP precursor in an argon atmosphere, placing the LMFP precursor in an SLM-laser-microwave coupled cavity, regulating and controlling parameters such as oxygen partial pressure and laser power density, synchronously performing microwave heating, inducing plasma shock waves, spraying PTFE micro powder, performing He quenching, and finally annealing and screening to obtain a product. The positive electrode material has the advantages of zero carbon coating, deep oxygen vacancy, high electron conductivity, high pole piece density, and excellent high and low temperature performance and cycle stability of the battery.