31results about How to "Excellent resistance to alternating cold and heat" patented technology

The invention relates to silicone gel and specifically provides a high adhesiveness silicone gel for embedding a precision electron component. The silicone gel comprises a component A and a component B that have similar viscosity and are in transparent fluid shape. The component A mainly comprises vinyl silicone oil and catalyst; the component B mainly comprises vinyl silicone oil, cross-linking agent and inhibitor; an accessory employs a diluent or an adhesion agent or a mixture of the two; the accessory is arranged in the component A or the component B or both of the two; and the component A and the component B are independently packaged and mixed in a ratio of 1:0.8-1.2 for usage. The invention has advantages of good fluidity, property of automatic deaeration and simple operation. The component A and the component B are independently packaged, and the two components will not gelatinize after mixing, so as to gain a long operating time; the mixture can solidify rapidly once heated, and the solidification time can be controlled freely by temperature and inhibitor amount; and the silicone gel is in semi-solidification state after solidification, has good adhesiveness and sealing performance on many base materials and has excellent hot-cold alternate resistance.

The invention relates to a general plastic auto primer and the preparation method thereof, pertaining to the coating technical field. The invention solves the universality of plastic auto primer and is characterized in that the primer comprises the components with certain weight portions, modified thermoplastic acrylic resin of 55-65wt portions, paint of 20-25wt portion, dispersion agent of 0.3-1.0wt portions, flow agent of 0.1-0.3wt portions and solvent of 15-30wt portions. The components are mixed and grinded for preparing the primer. The product of the invention is mainly characterized in that the product is applicable for primer coating of various auto plastic components and for plastic components of different materials, thereby, the product can reduce waste and trouble which are caused by frequent exchange of paint and dramatically improve work efficiency. In addition, the product of the invention has excellent boiling resistance and hot-cold alternation resistance. The product is proved to have better index of pencil hardness, adhesive, impact strength and water resistance, etc. over than the prior product and is expected to replace the prior plastic auto primer product.

The invention provides high-temperature-resistant and anti-radiation paint. The paint is prepared from the following raw materials in parts by weight: 10-15 parts of silica sol, 10-15 parts of expanded graphite, 5-10 parts of carbon nano tubes, 1-5 parts of titanium dioxide, 5-10 parts of glass powder, 5-10 parts of talcum powder, 20-25 parts of mica powder, 0.5-3 parts of hydroxypropyl methyl cellulose, 1-5 parts of DPOA (dicyclopentenyl oxyethyl acrylate) and 20-30 parts of water. The invention further provides a preparation method of the high-temperature-resistant and anti-radiation paint. Components in the high-temperature-resistant and anti-radiation paint provided by the invention coordinate mutually, and complement each other's advantages, so that the paint has the characteristics of being outstanding in corrosion resistance, radiation prevention, bacterial resistance, flame retardance, high-temperature tolerance, crack prevention, storage stability and the like on the premise that good adhesive force is maintained.

The invention discloses a sealant for electrical apparatus insulation. The sealant for electrical apparatus insulation is prepared from, by weight, 50-60 parts of bisphenol A epoxy resin, 30-35 parts of water-soluble phenolic resin, 30-35 parts of natural rubber, 5-8 parts of methyl trichlorosilane, 3-8 parts of dimethyl dichlorosilane, 1-3 parts of dioctyl phthalate, 5-10 parts of rosin pentaerythritol ester, 3-6 parts of vinyl acetate, 5-9 parts of quartz powder, 4-8 parts of calcium carbonate, 2-5 parts of silica, 5-10 parts of manganese dioxide and 12-13 parts of carbon black. The sealant has excellent cold-hot alternating resistance performance, aging resistance performance and electrical insulation performance, can have the sealing and adhering effects on electronic components and parts and does not produce pollution to the surroundings.

The invention discloses an organic silicon modified acrylic resin primer of plastic articles. The primer comprises the following constituents by weight percent: 45-55% of organic silicon modified acrylic resin, 10-15% of hexamethyl alcohol etherified amino resin, 20-25% of pigment, 6-15% of accessory ingredient and the balance of solvent. The primer has better compatibility to the plastic articles made of different materials, so that waste and trouble caused by frequent change of paint during construction can be reduced by utilization of such product, and the working efficiency is improved greatly. The product in the invention has better boiling resistance and thermal cycling resistance.

The invention belongs to the technical field of circuit boards and discloses a high-thermal-conductivity metal-based double-sided copper-based copper-clad plate. The high-thermal-conductivity metal-based double-sided copper-based copper-clad plate comprises a metal copper plate, protective film layers, heat conduction layers and copper foil layers; the metal copper plate is arranged in the middle;the copper foil layers are fixedly mounted at the top and bottom of the metal copper plate; and the heat conduction layers are fixedly mounted at the top and bottom of the copper foil layers. According to the high-thermal-conductivity metal-based double-sided copper-based copper-clad plate and the preparation process thereof of the invention, a heat conduction adhesive is additionally adopted, and the heat conduction adhesive has excellent cold and hot alternating resistance, aging resistance and electric insulation performance; the heat conduction layers are adopted, and the heat conductionlayers have small thermal resistance, excellent viscoelastic properties and thermal aging resistance and can bear mechanical and thermal stress; since the heat conduction adhesive and the heat conduction layers are adopted, the thermal conductivity of the metal-based double-sided copper-based copper-clad plate can be greatly improved, the heat of an electronic device can be dissipated quickly whenthe metal-based double-sided copper-clad plate is used together with the electronic device; and therefore, the popularization of the metal-based double-sided copper-based copper-clad plate is benefited.

The invention provides a high-temperature-resistant anti-corrosion and anti-radiation coating. The coating comprises the following raw materials in parts by weight: 8-12 parts of aluminum sol, 10-15 parts of expanded graphite, 5-10 parts of carbon nano tube, 1-5 parts of titanium dioxide, 0.5-3 parts of hydroxypropyl methyl cellulose, 8-14 parts of glass powder, 5-10 parts of talcum powder, 20-25 parts of mica powder, 1-5 parts of methacrylic acid dicyclopentenyl-oxy-ethyl ester and 20-30 parts of water. The invention further provides a preparation method of the high-temperature-resistant anti-corrosion and anti-radiation coating. The components in the coating are mutually matched to complement the advantages each other, so that the coating has the properties of excellent corrosion resistance, radiation corrosion resistance, antibacterial property, flame retardance, high temperature resistance, cracking resistance, storage stability and the like on the premise that the adhesive force is remained.

The invention discloses an electrical appliance insulation sealant which is prepared from the following raw materials in parts by weight: 50-60 parts of bisphenol A type epoxy resin, 30-35 parts of water soluble phenolic resin, 30-35 parts of natural rubber, 5-8 parts of methyltrichlorosilane, 3-8 parts of dichlorodimethylsilane, 1-3 parts of dioctyl phthalate, 5-10 parts of pentaerythritol ester of rosin and the like. Meanwhile, the electrical appliance insulation sealant is also prepared from a mixture of sodium bicarbonate particles and carbon powder, wherein the particle size of the mixture is smaller than 0.1mm. When being just filled into a position to be sealed, the sealant is heated to 50 DEG C or above by hot air blown from an air blower, and heating is stopped after continuing for 30s. The invention provides a novel sealant with good heat dissipation function.

The invention provides anti-corrosion and anti-radiation coating. The anti-corrosion and anti-radiation coating is prepared from the following raw materials in parts by weight: 20 to 30 parts of novolac epoxy resin, 10 to 15 parts of perlite, 10 to 15 parts of expanded graphite, 5 to 10 parts of carbon nano tube, 1 to 5 parts of titanium dioxide, 0.5 to 3 parts of hydroxypropyl methyl cellulose, 8 to 14 parts of glass powder, 5 to 10 parts of talcum powder, 15 to 20 parts of mica powder, 1 to 5 parts of dicyclopentenyl oxyethyl acrylate and 10 to 20 parts of water. The invention also provides a preparation method of the anti-corrosion and anti-radiation coating. In the anti-corrosion and anti-radiation coating provided by the invention, all components are matched with each other and have complementary advantages, so that the anti-corrosion and anti-radiation coating has the excellent characteristics of corrosion resistance, radiation resistance, bacterial resistance, flame retardance, high temperature tolerance, chapping resistance, storage stability and the like on the premise of keeping a good adhesive force of the anti-corrosion and anti-radiation coating.

The invention discloses a cylindrical lithium battery. The cylindrical lithium battery comprises a battery cell, a cylindrical inner housing, a housing, a positive terminal and a negative terminal, wherein the battery cover is packaged in the inner housing; the housing covers the inner housing; the positive terminal and the negative terminal are positioned on middle positions of upper and lower end surfaces of the housing respectively, and a cover plate is arranged on the upper end surface of the housing; a glue injection opening A is formed in the cover plate; a glue injection opening B is formed in a position, corresponding to the glue injection opening A, in the lower end surface of the housing; high heat-conduction electronic silica gel is filled between the inner housing and the housing. According to the cylindrical lithium battery disclosed by the invention, the high heat-conduction electronic silica gel can enable the cylindrical lithium ion battery to conduct heat produced by the battery cell into the environment more quickly and uniformly, the sealing performance and the vibration resistance of the housing are effectively improved; the high heat-conduction electronic silica gel belongs to room-temperature curing organic silicon rubber, has excellent electrical performance, ageing resistance, cold and hot alternating resistance, moisture resistance, non-swelling performance, vibration resistance and water resistance, so that the safety coefficient of the lithium battery in the using process can be increased.

The invention provides a high temperature resistant anticorrosion coating, which comprises the following raw materials in parts by weight: 8-12 parts of aluminum sol, 15-20 parts of aluminum dihydrogen phosphate, 8-14 parts of glass powder, 5-10 parts of talc powder, mica 20-25 parts of powder, 1-5 parts of dicyclopentenyloxyethyl acrylate and 20-30 parts of water. The present invention also provides a preparation method of the above-mentioned high temperature resistant anticorrosion coating. The components in the above-mentioned high-temperature-resistant anti-corrosion coating provided by the present invention cooperate with each other and complement each other, so that the coating has excellent anti-corrosion, high temperature resistance, crack resistance, storage stability, etc. under the premise of maintaining good adhesion. characteristic.

The invention discloses a graphene heat-conducting film applied to a mobile phone and a tablet computer. The graphene heat-conducting film comprises a graphene heat-conducting film body, a double-faced adhesive tape layer and a heat-conducting silica gel sheet, wherein the graphene heat conduction film body comprises a substrate and a graphene layer, and the graphene layer is distributed on the upper surface of the substrate; the heat conduction silica gel sheet is attached to the lower surface of the substrate; the double-faced adhesive tape layer is attached to the lower surface of the heat-conducting silica gel sheet; graphene in the graphene layer comprises a carbon element and a non-carbon element; the non-carbon element is at least one of fluorine, nitrogen, oxygen, sulfur, hydrogen,chlorine, bromine and iodine; and the graphene in the graphene layer is graphene with a functional group, the functional group is at least one of hydroxyl, carboxyl, carbonyl, amino and sulfydryl, and gaps of a contact surface are filled with the heat-conducting silica gel sheet, so the overall heat transfer efficiency of the graphene heat-conducting film is greatly improved, and the graphene heat-conducting film is easy to transport, convenient to apply and excellent in heat-conducting property.

The invention provides a high temperature resistant coating, which comprises the following raw materials in parts by weight: 10-15 parts of silica sol, 15-20 parts of aluminum dihydrogen phosphate, 5-10 parts of glass powder, 5-10 parts of talc powder, mica powder 20-25 parts, 1-5 parts of dicyclopentenyloxyethyl acrylate and 20-30 parts of water. The present invention also provides a preparation method of the above-mentioned high temperature resistant coating. The components in the above-mentioned high-temperature-resistant coating provided by the present invention cooperate with each other and complement each other, so that the coating has excellent anti-corrosion, high-temperature resistance, anti-cracking, storage stability and other characteristics under the premise of maintaining good adhesion. .

The invention discloses a high-waterproof LED (Light Emitting Diode) lamp tube plug which comprises an outer plug base and an inner plug base, and is characterized in that the outer plug base comprises a copper hollow insert, a carrying lug boss and a T-shaped wire, wherein the copper hollow insert is arranged at the front end of the outer plug base and is used for containing a standard contact pin; the carrying lug boss is buckled with the inner plug base; the T-shaped wire is arranged on one side of the carrying lug boss; an external bulge used for buckling the outer plug base with the inner plug base is arranged at the lower end of the carrying lug boss; a waterproof layer is arranged on the outer side at the lower end of the carrying lug boss; a waterproof groove matched with the waterproof layer is formed in an inner wall of the inner plug base. According to the high-waterproof LED lamp tube plug, the waterproof layer is arranged at a cross of the outer plug base and the inner plug base, so that the waterproof property is excellent, the short circuit of the lamp tube plug caused by air humidity is prevented, and the high-waterproof LED lamp tube plug has the advantages of simple structure, excellent waterproof property, and the like.

The invention discloses an anti-spalling primer, comprising the following components by weight: 45-55% of modified thermoplastic acrylic resin, 10-15% of hexamethylated amino resin, 20-25% of a pigment, 6-15% of an auxiliary agent and the balance of a solvent. The product provided by the invention has good boiling resistance and thermal alternation resistance, and is superior to an existing product in the indexes such as pencil hardness, adhesion, impact strength and water resistance.

The invention discloses a high-heat-dissipation multilayer copper substrate and a manufacturing process therefor, and the substrate comprises a circuit layer, an ink layer and a refrigeration tube. The outer surface of the circuit layer is provided with a waterproof layer, and a screw hole is arranged below a wiring hole. A through hole is fixedly installed at one side of a screw, and a pressure plate is disposed under a carbon-based composite fiber layer. A resin coating substrate is disposed under a thermal interface layer, and a copper coating plate is disposed under the resin coating substrate. A metal core substrate is disposed under a non-woven substrate, and a shielding plate is disposed under a polyester film. A substrate is disposed under a silicone film, and a buffer layer is disposed under a thermal adhesive layer. A heat dissipation tail is disposed under the copper substrate, and the refrigeration tube and the heat dissipation tail are fixedly connected. According to the invention, the substrate provided by the invention is provided with the refrigeration tube, a bright silver plating layer and the screw, which enhances the cooling effect, improves the utilization ratio of the light, and solves the problem that an existing copper substrate is not convenient for disassembly.

The invention provides high-temperature resistant anti-radiation paint. The high-temperature resistant anti-radiation paint is prepared from the following raw materials in parts by weight: 10 to 15 parts of zirconium sol, 6 to 10 parts of aluminium dihydrogen phosphate, 8 to 12 parts of expanded graphite, 5 to 10 parts of carbon nanotubes, 1 to 5 parts of titanium dioxide, 5 to 10 parts of glass dust, 5 to 10 parts of talcum powder, 20 to 25 parts of mica powder, 0.5 to 3 parts of hydroxypropyl methyl cellulose, 1 to 5 parts of dicyclopentenyl oxyethyl ether acrylate and 20 to 30 parts of water. The invention also provides a preparation method for the high-temperature resistant anti-radiation paint. According to the high-temperature resistant anti-radiation paint provided by the invention, various components cooperate to each other and the advantages thereof are complementary to each other, such that the paint has the characteristics of excellent resistance to corrosion, radiation, bacteria, combustion, high temperature and cracking, and storage stability on the premise of keeping favorable adhesive force.

The invention discloses plastic part undercoat which consists of the components in percentage by weight: 45-55 percent of modified thermoplastic acrylic resin, 10-15 percent of hexa-methanol etherification amino resin, 20-25 percent of paint, 6-15 percent of an accessory ingredient and the balance of a solvent. The plastic part undercoa disclosed by the invention is high in boiling resistance and cold-heat alternation resistance. The indexes, such as pencil hardness, adhesive force, impact strength and water resistance, of the product, are higher than those of the conventional product.

The invention discloses a system and a method for monitoring the temperature of a cylindrical lithium ion battery, belonging to the field of lithium batteries. A system and method for monitoring the temperature of a cylindrical lithium-ion battery, including a lithium-ion battery body and a control module, a comparison module, a temperature detection module, a temperature control module, and an alarm module disposed in the lithium-ion battery body, the lithium-ion battery body includes The battery steel shell and the winding core fixed in the battery steel shell, the comparison module, the temperature detection module, the temperature control module and the alarm module are all connected to the control module signal, and the comparison module is used to compare the lithium-ion battery body displayed by the temperature detection module External and internal temperature difference information, the temperature detection module is used to detect the internal temperature and external temperature of the lithium-ion battery body, which can realize real-time monitoring and accurate measurement of the internal and external temperature of the battery during the charging and discharging process of the battery, and improve the quality of the lithium-ion battery. safety of use.

The invention relates to a preparation method of a safe high-thermal-conductivity floor heating material and belongs to the technical field of building materials. According to the invention, a layer of metal aluminum with good thermal conductivity is sputtered on the surface of carbon fiber by mutual vibration and friction of a large amount of carbon fiber molecules under movable vibration of an electric field by electric power, so that the heat conductivity of the carbon fiber can be improved; the surface of the composite carbon fiber is coated with a layer of silica gel material, and then carbonized, so that the composite carbon fiber has excellent moisture-proof, aseismic, corona-resistant, leakage-resistant and chemical medium-resistant properties, and has good thermal conductivity; bauxite, cordierite and kaolin are taken as main raw materials to prepare the safe high-thermal-conductivity floor heating material, the cordierite has a low thermal expansion coefficient, high chemicalstability, excellent thermal shock resistance and certain mechanical strength, and the main component in the bauxite is aluminum oxide, and the prepared floor heating material has the advantages of being high in mechanical strength, high in electrical resistivity, good in electrical insulation property and high in melting point.

The invention discloses a battery line system integration device which comprises a protection box, wherein copper foil is arranged on an inner wall of the protection box; line holes are formed on thetwo sides of an inner cavity of the protection box; wear-proof layers are arranged on the surfaces of the line holes; and insulation layers are arranged on the surfaces of the wear-proof layers and comprise polyvinyl chloride resin layers, polyurethane layers and heat conduction glue layers. The protection box, the copper foil, the insulation layers, the wear-proof layers, the polyvinyl chloride resin layers, the polyurethane layers, the heat conduction glue layers, polyethylene layers, polyimide layers, polyurethane coating layers and the line holes are matched for use to solve the problem that the existing battery line system integration device is poor in safety during use since vibration is hard to avoid to cause harness damage to result in potential safety hazard during operation; theuse of a user is facilitated; and the practicability of the battery line system integration device is improved.

The invention discloses a water-based flame-retardant inorganic coating for the surface of an aluminum product as well as a preparation method and application of the water-based flame-retardant inorganic coating. The water-based flame-retardant inorganic coating comprises a component A and a component B, wherein the component A comprises silica sol, alumina sol and a defoaming agent; and the component B comprises an inorganic flame-retardant pigment, an inorganic flame-retardant filler, ethanol, a dispersing agent, an anti-settling agent, a thickening agent and methylsiloxane. A coating formedby the water-based flame-retardant inorganic coating for the surface of the aluminum product provided by the invention has relatively good adhesive force, salt spray resistance, acid and alkali resistance, wear resistance and scrubbing resistance performance on the surface of the aluminum product, and has relatively good high-temperature resistance and flame retardance.

The invention relates to high-firmness epoxy paint. The high-firmness epoxy paint comprise the following components in a formula by weight percent: 28.27-32.46% of modified epoxy resin, 15.12-17.21% of modified amine hardener, 32.58-29.45% of pigment, 3.12%-4.08% of flexibilizer, 2.36-1.88% of anti-settling agent and 18.55%-14.92% of solvent. The high-firmness epoxy pain solves the problems that the existing thick anticorrosive paint film on a sewer line and a sewage conduit has poor adhesive force, hot water resistance and hot and cold alternation resistance.

The invention relates to a coating, in particular to an anti-corrosion and anti-radiation coating for nuclear power. The anti-corrosion and anti-radiation coating is characterized by comprising the following raw materials in parts by weight: 10-15 parts of titanium dioxide, 7-9 parts of calcium carbonate, 6-8 parts of potassium titanate crystals, 3-5 parts of talcum powder, 3-4 parts of carbon nano tubes, 12-14 parts of kaolin powder, 1-5 parts of expanded graphite, 7-9 parts of glass powder, 0.5-1.5 parts of hydroxypropyl methyl cellulose, 2-4 parts of triethanolamine, 11-14 parts of wollastonite powder and 15-35 parts of water. The coating has excellent characteristics of corrosion resistance, radiation resistance, high-temperature tolerance, crack prevention, cold-hot alternation resistance, storage stability and the like on the premise that good adhesion force is kept.

The invention provides an ultra-thin and super-conductive integral panel radiator, production equipment and technology, and relates to the technical field of heating equipment. The radiator includes: two D-shaped header pipes, several square heat dissipation pipes, and integral stamping and forming The outer cover; the two D-shaped header pipes are arranged in parallel, the end of one D-shaped header pipe is used to connect the water inlet pipe, and the end of the other D-shaped header pipe is used to connect the water outlet pipe; the square The radiating pipe is arranged perpendicular to the D-type header pipe, and its two ends are respectively connected with the plane side walls of the two D-type header pipes, and several of the above-mentioned pipes are evenly spaced along the extending direction of the D-type header pipe. Square heat dissipation pipe; the outer cover is covered on the periphery of the main body of the radiator composed of D-shaped header pipe and square heat dissipation pipe, and the contact surface is coated with thermal conductive glue. This type of radiator has a more reasonable structure and process, a simple and elegant appearance, takes up less space, and has a better heat dissipation effect than similar products.

The invention discloses a reinforced seamless steel pipe perforated plug, comprising a plug base, a transition layer and a strengthening layer are sequentially arranged on the outer surface of the plug base from the inside to the outside, and the transition layer includes the following components in parts by weight: iron : 61.0-79.0%; Co: 5.0-10.0%; Chromium: 10.0-15.0%; Mo: 5.0-10.0%; Nickel: 1.0-4.0%; The additive with a fraction of 4% is composed of two parts, and the main material includes the following components by weight: cobalt: 20.0-30.0%; nickel: 20.0-30.0%; chromium: 15.0-20.0%; niobium: 5.0-5.5% ; silicon: 1.0-2.5%; tungsten: 1.0-2.0%; carbon: 1.0-1.8%; boron: 3.5-5.0%; rare earth: 0.5-0.9%; iron: 2.3-30.7%, the present invention has good strength and In addition to the hardness, it also has high temperature resistance, which can also reduce the friction between the plug and the steel pipe, and improve the quality of the inner wall of the steel pipe, thereby reducing the workload of the subsequent processing of the steel pipe, which is also conducive to reducing the sticking of steel on the surface of the plug, and also reduces the workmanship. workload.

The invention provides a radiation-resistant paint which comprises the following raw materials in parts by weight: 20-30 parts of novolac epoxy resin, 10-20 parts of expanded graphite, 5-10 parts of carbon nanotube, 1-5 parts of titanium white, 5-10 parts of glass powder, 5-10 parts of talcum powder, 20-25 parts of mica powder, 0.5-3 parts of hydroxypropyl methylcellulose, 1-5 parts of bicyclopentenyloxyethyl acrylate and 20-30 parts of water. The invention also provides a preparation method of the radiation-resistant paint. Various components in the novolac epoxy resin multifunctional radiation-resistant paint interact and complement each other's advantages, so that the paint has the characteristics of excellent corrosion resistance, excellent radiation resistance, excellent antimicrobial property, excellent flame retardancy, excellent high temperature resistance, excellent crack resistance, high storage stability and the like.

The invention relates to the technical field of water-based coatings, and discloses a heavy equipment cab water-based two-component energy-saving coating which comprises a component A and a component B, the component A is prepared from the following raw materials in percentage by weight: 50 to 55 percent of hydroxyl acrylic acid dispersion, 12 to 15 percent of titanium dioxide coated mica powder, 10 to 12 percent of hollow glass beads, 6 to 11 percent of IR coloring pigment, 1 to 3 percent of auxiliaries and 5 to 7 percent of water, and the component B is prepared from the following raw materials in percentage by weight: 80 percent of isocyanate and 20 percent of PGDA. According to the heavy equipment cab water-based two-component energy-saving coating, a paint film has excellent ultraviolet aging resistance, dry-wet alternating resistance and cold-hot alternating resistance, and can resist artificial accelerated aging for more than 1000 hours; the paint film is resistant to acid, alkali, fuel oil and lubricating oil; the reflectivity of the paint film to infrared rays reaches 87% or above, the temperature rising speed is greatly reduced under sunlight irradiation or radiation of other heat sources, and the surface temperature can be reduced by 10-25 DEG C; and the paint film has a good thermal resistance effect, and the heat conductivity coefficient is lower than 0.025 W / (m * K).

The invention discloses a preparation method of a thermal barrier coating with a composite structure. The preparation method comprises the following steps: S1, coating the surface of an alloy matrix with a bonding layer; s2, performing plasma spraying on a lower layered structure, wherein the thickness of the layered structure is 100-200 [mu] m; and S3, laser coaxial powder feeding deposition is conducted on an upper-layer columnar crystal structure, the number of deposition layers is 1-10, the thickness of the columnar crystal structure is 100-1000 microns, the diameter of columnar crystals is 100-500 microns, and the gap between the columnar crystals is 10%-20% of the thickness of the upper-layer columnar crystal structure. The method is simple in process, low in raw material cost and process cost and high in design flexibility, and local coating of the surface of a complex part can be achieved; the prepared layered-columnar crystal double-layer structure thermal barrier coating has good thermal cycle resistance and erosion resistance.