35results about How to "Suitable for commercial application" patented technology

A compact video image recording device which is mountable to a gun and useful for recording video images before and after the firing of the gun. The recording device includes a camera comprising a lens and a video image sensor. The video recording device is mounted on the gun such that the viewing area of the camera includes the target area of the gun. The video image sensor generates an electronic signal representative of a video image impinging the respective sensor. The output of the image sensor is processed and generally employed to produce frame data which are successively stored in successive frame locations of a semiconductor memory organized as a circular buffer memory while the video recording device is in an active state. Upon the firing of the gun, additional frames are stored in the buffer memory for a short period of time and a portion of the buffer memory is employed to preserve a video record of the shooting both before and after the event. Additional frames are successively stored in the unused portion of the buffer memory. In the event of a further firing of the gun, an additional portion of the buffer memory is dedicated to preserving the image data associated with subsequent firing incident. This process may be repeated until the buffer memory is full in the event the gun is repeatedly fired. A video record is thus generated which documents the circumstances preceding and following the firing of the gun.

The invention discloses a vision positioning method and system based on low-precision GPS in automatic driving. Road surface lane lines are detected, extended Kalman filtering is performed on edge points of the lane lines to obtain curves of the lane lines, transverse distance between a vehicle and left and right lane lines is obtained, and based on a high-precision map and GPS, transverse position correction of the vehicle is obtained; road surface traffic signs are detected and identified, longitudinal distance between a vehicle-mounted camera of the vehicle and a target object at a currentmoment is calculated, and based on the high-precision map and GPS, longitudinal position correction of the vehicle is obtained; and finally, accurate vehicle positioning information is obtained basedon the transverse position correction and longitudinal position correction. Thus, by adoption of cooperation of the low-cost low-precision GPS and high-precision map, a high-precision vision auxiliarypositioning function is realized, the positioning is stable, the robustness is high and the cost is low, influence by shielding and reflection by barriers such as city buildings and viaducts does notexist, transverse positioning precision can be within 20 cm, and the vision positioning method and system are suitable for commercial popularization and application.

The invention provides a silicon oxide-carbon composite negative electrode material and a preparation method thereof and a lithium-ion battery. The preparation method comprises the following steps of(a) heating silicon oxide to first temperature in inert atmosphere, adjusting the flow velocity of an inert gas and carrying out heat preservation to obtain a silicon oxide composite material connected with a silicon nanowire, wherein the first temperature is 800-1300 DEG C and the flow velocity of the inert gas is 0-800sccm; and (b) adjusting the silicon oxide composite material, obtained in thestep (a), connected with the silicon nanowire to second temperature, introducing a carbon source gas for chemical vapor deposition under the condition of introducing the inert gas, cooling and then obtaining the silicon oxide-carbon composite negative electrode material, wherein the second temperature is 600-1,000 DEG C. The silicon oxide-carbon composite negative electrode material connected withthe silicon nanowire is obtained by adopting a preparation technology of combining in-situ growth of the silicon nanowire with carbon coating; the electron island effect of a silicon oxide-based material in a charge-discharge cycle process is effectively relieved through building a three-dimensional conductive network; and the silicon oxide-carbon composite negative electrode material has excellent electrochemical properties.

The invention provides a steam hot compress facial mask. The steam hot compress facial mask solves the problems that when an existing facial mask is used in winter, the absorptivity of a skin care product is low, and the face is not comfortable. The steam hot compress facial mask comprise a facial mask body, a left half face heating bag, a right half face heating bag and suspension loops, wherein the facial mask body comprises double layers of elastic non-woven fabric, the double layers of elastic non-woven fabric adhere to each other partially, so that an adhesion area and a cavity are formed, openings corresponding to the five sense organs of the face are formed in the facial mask body, the left half face heating bag is contained in the cavity, the right half face heating bag which is symmetrical with the left half face heating bag is contained in the cavity, and the suspension loops are integrated with the mask body. The invention further provides a production technology of the steam hot compress facial mask. The steps of the production technology are simple, and operation is easy. The steam hot compress facial mask can continuously emit heat for 15 to 30 minutes, and the heating temperature ranges from 40 DEG C to 45 DEG C; when the steam hot compress facial mask is used independently, the skin can be moisturized, pores can be shrunk, and the skin can be deeply cleaned; when the steam hot compress facial mask is used in cooperation with skin care products, the absorptivity of the skin care products can be increased; the steam hot compress facial mask is easy to operate, safe in use and suitable for commercial application and popularization.

The invention discloses a stepping peristalsis type driving and exciting method based on multi-piezoelectric-vibrator bending movement, and relates to the field of electric precise driving. The problems that an existing piezoelectric driving technology can hardly achieve positioning and strokes at the same time, and applied signals and output displacement are limited when a piezoelectric stack device works in an axial telescopic mode are solved. An amplitude-change pole is arranged at the tail end of each piezoelectric vibrator, a drive foot is arranged at the tail end of each amplitude-change pole, and a horizontal bent ceramic set and a vertical bent ceramic set are arranged at the head end of each piezoelectric vibrator; the head ends of the n piezoelectric vibrators are all fixedly connected with a base, the side faces of the drive feet all make contact with a rotor, and the vertical bent ceramic sets apply DC exciting signals to generate bending in the vertical direction; the horizontal bent ceramic sets apply DC exciting signals to generate bending in the horizontal direction, and when the drive feet make contact with the rotor, the drive feet can drive the rotor to do the horizontal movement through friction force; it is ensured that one drive foot keeps making contact with the rotor. The method is used for piezoelectric precise driving.

An apparatus and method for the synthesis and treatment of electrocatalyst particles in batch or continuous fashion is provided. In one embodiment, the apparatus is comprised of a three-electrode cell which includes a reference electrode, a counter electrode, and a working electrode. The working electrode is preferably a cylindrical vessel having an electrically conductive region. The electrode assembly is introduced into a slurry containing metal ions and a plurality of particles. During operation an electrical potential is applied and the working electrode is rotated at a predetermined speed. When particles in the slurry collide with the electrically conductive region the transferred charge facilitates deposition of an ad-layer of the desired metal. In this manner film growth can commence on a large number of particles simultaneously. This process is especially suitable as a commercial thin film deposition process for forming catalytically active layers on nanoparticles for use in energy conversion devices.

A semipermeable gas separation membrane is plasma deposited from liquid organosiloxane monomer having at least three silicon atoms and an alpha hydrogen atom. The semipermeable membrane may be employed as a gas-selective membrane in combination with a porous substrate.

The invention provides a column chromatography device with a warning function. The device solves the problem that the existing chromatography device cannot alarm when the liquid is too much or too little. The device comprises a column body, an upper end socket, a lower end socket and a liquid level alarm, wherein a filler is filled in the column body, the column body is provided with a filler inlet and a filler outlet, the upper end socket is arranged on the upper end of the column body and provided with a liquid inlet, an exhaust port and a back-flushing liquid outlet, the lower end socket is arranged at the lower end of the column body and provided with the liquid outlet, the liquid level alarm is arranged on the upper end socket, and the column body is fixedly connected with the upper end socket and the lower end socket. By arranging the liquid level alarm, the column chromatography device with the warning function provided by the invention is capable of providing the warning function when the liquid is too much or too little under the unwatched state, and the device is reasonable in structure, convenient to operate, low in equipment cost, and suitable for commercial popularization and application.

The invention relates to a metal dot color optical filter, a manufacturing method thereof and a liquid crystal display device. The metal dot color optical filter comprises a green light metal dot material with a fluorescence peak close to 530 nanometers or a red light metal dot material with a fluorescence peak close to 635 nanometers, wherein the particle size of the green light metal dot material and the particle size of the red light metal dot material are less than 2 nanometers. The manufacturing method of the metal dot color optical filter comprises the steps of: step 10, preparing the green light metal dot material; step 20, preparing the red light metal dot material; and step 30, preparing the metal dot optical filters by using the green light metal dot material and the red light metal dot material respectively. The liquid crystal display device comprises the metal dot color optical filter. The metal dot material adopted by the metal dot color optical filter has a quantum size effect, and the light color is simple to adjust; the adopted metal dot material has good solubility and can be prepared into ink; and the adopted metal dot material is simple to synthesize, free of toxic elements such as lead and cadmium, environmentally friendly, low in cost and suitable for commercial application.

The invention discloses filter ultrasonic and electrolytic ultrasonic ship ballast water treatment equipment, and belongs to the field of water treatment equipment. The filter ultrasonic and electrolytic ultrasonic ship ballast water treatment equipment comprises a filter ultrasonic reactor and an electrolytic ultrasonic reactor; and the ship ballast water treatment equipment is sequentially connected with a sea chest, a ballast pump, a first pressure sensor, the filter ultrasonic reactor, a second pressure sensor, the electrolytic ultrasonic reactor, a third pressure sensor and a ballast tank. The invention also discloses a treatment method using the water treatment equipment. According to the equipment and the method, the defects of the prior art are overcome, the problems of low efficiency and high cost of the conventional method and equipment for treating ballast water are effectively solved, byproducts with equivalent level with seawater are not produced and preserved, and safe, practical, economic, effective and environmentally allowable requirements are met.

The invention provides a one-step superfast preparation method for a SnSe block thermoelectric material. The method is characterized in that in the protection of inert atmosphere, Sn powder and Se powder are taken as initial raw materials, argon tungsten arc welding is firstly adopted to trigger a chemical reaction, and high pressure is fast raised in situ in seconds to prepare the compact SnSe block thermoelectric material. The method is fast in reaction speed, simple in process, and saved in energy consumption. The whole preparation method can be shortened in 5 min, so that the method is suitable for commercial application and large-scale production.

The invention discloses selenium-rich loquat syrup. Every 1000 mL of the loquat syrup contains 75-500 micrograms of selenium. The selenium-rich loquat syrup is mainly prepared from the following raw materials in parts by weight: 10-20g of loquat leaves, 20-30g of loquat flowers, 80-120g of pears, 5-6g of orange peel, 4-6g of raw ginger, 80-120g of rock candy, 0.1-0.5 g of vitamin C and 0.15-10g ofselenium-rich vegetables. The product has the functions of activating the antioxidant system of a human body and improving the immune function of the human body, and improves the disease resistance;and meanwhile, the loquat syrup disclosed by the invention is suitable for infants and young children, has very good positive practical significance, and solves the urgent problem of the public.

The invention provides a graphene oxide-based nano composite material for amino acid enantiomer separation analysis and a preparation method thereof. The method comprises the steps of: dispersing an L-amino acid derivative gelator into a metal ion solution, and heating and cooling to obtain composite hydrogel; dropwise adding a graphene oxide solution into the composite hydrogel, oscillating and uniformly mixing, and standing for layering at room temperature;and performing filtration to obtain products. The method provided by the invention solves the problems of low separation efficiency, complex operation, difficult recycling and low repeatable utilization rate in the existing enantiomer separation process. The composite material disclosed by the invention can realize chiral conversion under the regulation and control of metal ions, and adsorption of different types of amino acid enantiomers is realized according to different chiral structures, so that effective separation is realized. The solid composite material is easy to recycle, can be repeatedly used, is convenient to operate and has practical application value. The preparation method of the material does not need complex synthesis steps, and is suitable for commercial application of enantiomer chiral separation analysis.

The invention belongs to the field of electrocatalytic materials, and discloses a cobalt tetraoxide / amino carbon nano-tube composite electrocatalytic material, preparation and applications thereof. The preparation comprises: oxidizing carbon nano-tubes by using the mixed acid of concentrated sulfuric acid and concentrated nitric acid to obtain oxidized carbon nano-tubes; adding the oxidized carbonnano-tubes, sodium hyponitrite and an amino functional agent to dimethylacetamide, heating to a temperature of 120-150 DEGC, and carrying out a thermal insulation reaction to obtain amino carbon nano-tubes; and adding the amino carbon nano-tubes, a cobalt metal salt and ammonia water to the mixed solution of dimethylformamide and ethanol, and carrying out a hydrothermal reaction at a temperatureof 150-180 DEGC to obtain the cobalt tetraoxide / amino carbon nano-tube composite electrocatalytic material. According to the present invention, the preparation method is simple, and the obtained catalytic material has good catalytic performance in the oxygen evolution reaction and the oxygen reduction reaction, can be used as the dual-function electrocatalyst for fuel cells or metal-air batteries,and has broad application prospects.

The invention provides a bismuth-based nano-particle catalyst as well as a preparation method and application thereof. The bismuth-based nano-particle catalyst comprises ellagic acid and N, methyl pyrrolidone molecules and bismuth nano-particles which are mutually independent and uniformly distributed around the two molecules. The bismuth-based nano-particle catalyst disclosed by the invention has a specific structure and morphology, salt containing bismuth metal is mixed with ellagic acid and N, methyl pyrrolidone, the three materials are self-assembled into hierarchical metal-phenolic mesocrystal with an ordered quaternary structure, and the bismuth-based nano-particle catalyst is obtained after electrochemical in-situ reduction; the invention also discloses a preparation method of the bismuth nanoparticle-based catalyst and application of the catalyst in carbon dioxide electroreduction reaction, under the action of the bismuth nanoparticles, single selective electrocatalytic reduction from carbon dioxide to formic acid is realized, and the bismuth nanoparticle-based catalyst is expected to be applied to efficient conversion of carbon dioxide gas.

The invention provides a microfluidic chip for detecting bacteria, a bacteria detector including the microfluidic chip, a method and an application in the technical field of bacteria detection. The microfluidic chip includes a sampling port, a reaction chamber and a chip channel; wherein, the sampling port and the reaction chamber are connected through a chip channel; the reaction chamber is pre-coated with an initiator chain and an aptamer; The microfluidic chip includes at least two layers, and the chip materials on at least one side of the reaction chamber are all visible materials. The invention provides a microfluidic chip and a detector for detecting food-borne germs, which are small in size, low in cost, convenient for mass production and easy to carry, and are based on microfluidic chip technology and hybridization chain reaction (HCR) and G- tetramer-mediated H 2 O 2 The color development method is combined, the operation is simple, the detection sensitivity is greatly improved, and the detection result is visible to the naked eye, which is suitable for commercial promotion and application.

The invention provides a column chromatography device with a warning function. The device solves the problem that the existing chromatography device cannot alarm when the liquid is too much or too little. The device comprises a column body, an upper end socket, a lower end socket and a liquid level alarm, wherein a filler is filled in the column body, the column body is provided with a filler inlet and a filler outlet, the upper end socket is arranged on the upper end of the column body and provided with a liquid inlet, an exhaust port and a back-flushing liquid outlet, the lower end socket is arranged at the lower end of the column body and provided with the liquid outlet, the liquid level alarm is arranged on the upper end socket, and the column body is fixedly connected with the upper end socket and the lower end socket. By arranging the liquid level alarm, the column chromatography device with the warning function provided by the invention is capable of providing the warning function when the liquid is too much or too little under the unwatched state, and the device is reasonable in structure, convenient to operate, low in equipment cost, and suitable for commercial popularization and application.

The invention relates to a preparation method of an optical rotation material. The method comprises the following steps: S1, preparation of a metal dot nanorod: dissolving a metal salt in a solvent, adding alkyl acid and a ligand, and preparing a metal dot nanorod material by a water bath one-pot method; and S2, compounding with a rubber material: mixing the metal dot nanorod material with the rubber material, and spin-coating and spreading to obtain the optical rotation material. According to the invention, the metal dot nanorod is prepared into a backlight diaphragm, and the backlight diaphragm is integrated in the backlight LCD module. By utilizing the optical rotation performance of the metal dot nanorods, the light utilization rate of backlight is improved, the exciting light intensity is utilized by 100%, the light utilization rate is improved, the display brightness is improved, and the metal dot nanorods become favorable substitute materials for backlight of a new generation of display screens.

The invention discloses a silica-based photoelectric foreign substance integrating method and a silica-based photoelectric foreign substance integrating chip, which pertain to the technical field of photoelectric foreign substance integration. The silica-based photoelectric foreign substance integrating method comprises the steps of: arranging a silica-based passive photonic device on a silicon chip to be used as an optical information transmission channel; arranging a CMOS (Complementary Metal Oxide Semicondutor) microelectronic integrated circuit in an III-V group chip; realizing an active area multi-layer quantum well structure of an active photonic device and the CMOS microelectronic integrated circuit on the III-V group chip through one-step extension; bonding an III-V group chip on the silicon chip by adopting a whole chip bonding process; and arranging an optical coupler in the III-V group chip. According to the silica-based photoelectric foreign substance integrating method, the micro-electronic circuit and the active photonic device are integrated in the same III-V group material layer, and enables the development and the application of the silica-based photoelectric foreign substance integrated chip are feasible; and the silica-based photoelectric foreign substance integrating method can be widely applied for development of next-generation high-density, large-capacity and multifunctional single integrated photoelectric chip.

The invention discloses a SOI / III-V full wafer bonding method adopting a three-dimensional vent-hole device, belonging to the technical field of silicon-based photoelectric heterogeneous integration. The three-dimensional vent-hole device comprises two parts, namely a vertical vent hole and a horizontal vent groove, wherein the vertical vent hole is cylindrical, penetrates through top silicon and directly reaches a buried oxide layer; by arrangement of the vertical vent hole, H2O and H2 gas generated during the bonding process can be absorbed and diffused through the loose and porous buried oxide layer; and the horizontal vent groove is provided with a cross shallow slot concentric with the vent hole and serves as a horizontal ventilating device to collect gas so that the gas can be quickly and effectively absorbed and diffused through the vent hole. Through adoption of the three-dimensional vent-hole device, defects generated on a bonding interface because of bubbles can be reduced greatly and the wafer bonding quality can be effectively improved.

A packaging film which contains pigment particles randomly distributed in a low surface-area density is used for the authentication of products. An imaging device is used to record a first digital image of a packaged product. The positional coordinates, and optionally the color values, of the pigment particles contained in the packaging film are determined from the digital image by means of a computer program and an identification code is calculated from the coordinate or color values and stored in a database. To authenticate the product at a later time, a second digital image is recorded and a test code is determined and compared with the recorded identification code.

The invention discloses a preparation method of an organic fertilizer for loquat trees, wherein the method comprises the following steps: (1) collecting residues containing loquat leaves and / or loquatflowers and ginger as main components, adding bean dregs and water, putting in a cell wall breaking device, carrying out wall breaking treatment to obtain a residue mixture; (2) adjusting the pH value to 5.5-6.5, and adding bacillus thuringiensis and monascus purpureus for fermentation; and (3) drying and crushing the fermented product, adding zinc sulfate, and uniformly mixing to obtain the organic fertilizer for the loquat trees. According to the method, the organic fertilizer with good metal element matching can be obtained, fermentation of plant residues is facilitated, and the organic fertilizer which is more completely fermented is obtained.

The transparent perovskite thin film transistor comprises a transparent substrate, a source electrode, a drain electrode, a gate electrode, an insertion layer, a semiconductor layer and a ferroelectric dielectric layer, the insertion layer is a transparent metal oxide and is arranged between the source electrode, the drain electrode and the semiconductor layer; the ferroelectric dielectric layer is located between the gate electrode and the semiconductor layer; the semiconductor layer is a transparent perovskite thin film. A layer of metal oxide thin film is inserted between the source electrode, the drain electrode and the transparent perovskite thin film to serve as an electron injection layer so as to reduce the electron injection barrier and improve the electron injection efficiency. Meanwhile, a ferroelectric material is used as a dielectric layer to inhibit a gate voltage shielding effect caused by ion migration of the transparent perovskite thin film; the transparent perovskite thin film transistor prepared on the basis can work at room temperature and is good in stability.

The invention discloses a logistics packaging bag, which comprises a bag body with a bag opening, and a sealing tongue for sealing and capping the bag opening. The sealing tongue and the bag body areintegrated; a first pasting area is arranged on the area, close to the bag opening, on the bag body; a second pasting area is arranged on the sealing tongue; and the first pasting area is provided with a pasting belt which is composed of a plurality of adhesive layers and isolation layers, wherein the adhesive layers and the isolation layers are arranged alternately. According to the logistics packaging bag, by arranging the multiple alternate adhesive layers and isolation layers, one adhesive layer and one isolation layer are consumed when the packaging bag is used once, the integrity of thepackaging bag is not damaged, and the purpose of multiple-time reuse is achieved.

The invention provides a silicon oxide-carbon composite negative electrode material and a preparation method thereof and a lithium-ion battery. The preparation method comprises the following steps of(a) heating silicon oxide to first temperature in inert atmosphere, adjusting the flow velocity of an inert gas and carrying out heat preservation to obtain a silicon oxide composite material connected with a silicon nanowire, wherein the first temperature is 800-1300 DEG C and the flow velocity of the inert gas is 0-800sccm; and (b) adjusting the silicon oxide composite material, obtained in thestep (a), connected with the silicon nanowire to second temperature, introducing a carbon source gas for chemical vapor deposition under the condition of introducing the inert gas, cooling and then obtaining the silicon oxide-carbon composite negative electrode material, wherein the second temperature is 600-1,000 DEG C. The silicon oxide-carbon composite negative electrode material connected withthe silicon nanowire is obtained by adopting a preparation technology of combining in-situ growth of the silicon nanowire with carbon coating; the electron island effect of a silicon oxide-based material in a charge-discharge cycle process is effectively relieved through building a three-dimensional conductive network; and the silicon oxide-carbon composite negative electrode material has excellent electrochemical properties.

The invention discloses a preparation method of a fishing net thread with high fish catching performance, and belongs to the technical field of fishing net thread processing and manufacturing. The preparation method comprises the following steps of (1) inner thread fiber preparation, (2) inner thread fiber coating agent preparation, (3) finished fishing net inner thread preparation, and (4) finished fishing net thread preparation. The preparation method of the high-quality fishing net thread is reasonable in process step matching and easy to apply and popularize, and the prepared fishing net thread has the advantages of being high in strength, good in stability and high in fish catching performance.

The invention relates to a method for static and dynamic synergistic extraction of astaxanthin by wall-broken lactobacillus supercritical CO2. The method comprises the following steps: adding the dried plant lactobacillus to ethanol, and after ball-milling wall-breaking, obtaining the lactobacillus bacteria slurry as an extraction raw material; mixing diatomite and lactobacillus bacteria slurry, and adding a mixture to an extraction vessel; setting the supercritical extraction temperature to 35-60 DEG C and the supercritical extraction pressure to 10-40 MPa, and flowing supercritical CO2 fromabove the extraction vessel, when the supercritical extraction temperature and the supercritical extraction pressure reach a set value and are stabilized, closing a valve (V2), and cutting off the extraction kettle and a separation vessel; and after the high-pressure solubilization static extraction is completed, regulating the valve and introducing the supercritical CO2 for dynamic synergistic extraction. The method is used for extracting astaxanthin from lactobacillus, has the advantages of low cost, simple operation steps, and high extraction rate, no other organic solvent consumption except ethanol is required, and the whole process is green, low energy consumption and suitable for commercial application.

The invention discloses a pressurization-heat preservation pre-sealing pressing high-pressure and high-temperature device. The pressure of a primary assembly of a cubic press is increased to 12 GPa from 6 GPa. The high-pressure assembly comprises the following parts: (1) six holding-up hammers which are made of special materials and are synchronously driven by the cubic press, (2) a pyrophyllite pressure transfer medium with a pre-sealing edge or a gradient component, (3) two high-hardness material pressurizing plugs, (4) two high-hardness material pressurizing columns, (5) a sealing pressingmetal cylinder, (6) a sealing pressing heat preservation cylinder, (7) a sealing pressing unit composed of the sealing pressing metal cylinder and the sealing pressing heat preservation cylinder and (8) a pressure boosting unit composed of the pressurizing plugs and the pressurizing columns. The heating and heat preservation units are made of materials with low thermal conductivity and high resistivity. The high-pressure device can reach the pressure of 12 GPa. Compared with the existing device, the device provided by the invention increases pressure by 100% and increases the temperature by 1800 DEG C or above. The device has the advantages of stable and reliable high-pressure and high-temperature performance, large sample cavity size, high pressure generation efficiency and the like.

The invention relates to a carbon cloth-supported nickel-cobalt-oxygen nanosheet composite material, a preparation method thereof, and application of electrodes; cobalt nitrate and nickel nitrate are dissolved in deoxidized deionized water, stirred and dissolved in a gas protective atmosphere to obtain a mixed salt solution; stir sodium hydroxide solution and mixed salt solution evenly at room temperature, then centrifuge the precipitate, wash with deionized water and anhydrous ethanol; vacuum dry the obtained precipitate to obtain a precursor, and sinter to obtain a product that can be used in air batteries Cathode NiCoO nanosheet composite catalyst. NiCoO nanosheet composites are made of Ni 0.6 Co 2.4 O 4 It is composed of two phases, NiO and NiO, and the diameter of the nanosheet is 100-150 nanometers and the thickness is 10-30 nanometers. The invention realizes the preparation of the nickel-cobalt-oxygen porous nano-sheet composite material catalyst applied to the cathode of the air battery by the method of co-precipitation and sintering, the experimental steps are simple, and the electrode catalytic performance is excellent.