174results about How to "Reduced durability" patented technology

The invention relates to the technical field of metal casting, in particular to a well lid casting rapid demolding device which comprises a casting body, a demolding assembly is arranged in an inner cavity of the casting body, a lower mold cavity is formed in the upper surface of the casting body, a hydraulic cylinder is fixedly installed on the inner wall of the casting body, and a piston rod is slidably connected to an inner cavity of the hydraulic cylinder. Automatic demolding is achieved through the demolding assembly, the demolding mechanism ejects a workpiece through flexible force, the situation that the workpiece or a mold is damaged due to ejection of the demolding mechanism with too high rigidity or manual beating or jolting demolding is prevented, meanwhile, the ejection height of the workpiece during demolding can be adjusted, and in addition, whether the workpiece is evenly stressed or not during demolding can be detected; the appearance attractiveness of the outer surface of the well lid is guaranteed, deformation is prevented, the durability and the bearing capacity of the well lid are improved, the discharging mode can be switched through the discharging assembly, quantitative discharging is adopted when casting of raw materials is about to be finished, and the proper amount of the casting raw materials is guaranteed.

The invention relates to the technical field of basalt concrete, in particular to basalt ultra-high performance concrete and a preparation method thereof, the preparation method comprises a raw material screening method and a preparation method, and the raw material screening comprises the steps of (1) selecting ultra-high performance concrete water, (2) selecting a cementing material, (3) selecting aggregate and (4) selecting fiber. The preparation method comprises the following steps: (1) the use amount of water should meet the design specification of the ultra-high performance concrete, and the water-binder ratio should be controlled within 0.25; and (2) according to the particle sizes of the cementing material and the sand, the dosage of each component is calculated on the basis of the closest packing theory, and the sand-cement ratio is controlled within 1.1-1.4. By adopting the method, in-situ utilization of the raw materials of the ultra-high-performance concrete can be realized in volcanic diagenetic regions, and design, preparation and application of the basalt ultra-high-performance concrete can be realized in practical engineering.

The invention discloses a flow channel fault diagnosis method for a cooling system of a water-cooled hydrogen fuel cell. The flow channel fault diagnosis method comprises the following steps: collecting state data of a current fuel cell; predicting state parameters of the cooling system based on the collected current state data of the fuel cell; and judging whether the flow channel of the cooling system has a fault based on the predicted state parameters of the cooling system. The fuel cell cooling system fault diagnosis method has the advantages that the fault diagnosis accuracy of the fuel cell cooling system is improved, abnormity such as semi-blockage of the cooling liquid flow channel is recognized in advance, and local overtemperature caused by poor heat dissipation effect due to insufficient reactor entering flow is avoided.

The invention relates to the technical field of preparation of microcrystalline glass, in particular to lithium metasilicate microcrystalline glass and a preparation method thereof, the lithium metasilicate microcrystalline glass comprises the following components in percentage by mass: 62%-78% of SiO2, 3%-10% of Al2O3, 4%-18% of Li2O, 0-5% of K2O, 0.6%-7.5% of P2O5 and 2%-15% of ZrO2, the value of (SiO2 + Al2O3) / Li2O) is 6-15, the value of Al2O3 / Li2O is 0.7-1.3, and P2O5 + ZrO2 is less than 8%. According to the technical scheme, by designing a proper basic glass material formula, a heat treatment crystallization process system and a chemical strengthening process, the high-strength transparent glass ceramic with lithium metasilicate as a main crystal phase is obtained; the glass has the characteristics of large surface compressive stress, high strength, strong ion exchange capacity, excellent impact resistance, excellent falling resistance and the like, so that the application requirement of the glass as a cover plate on an electronic product is met. The problems that in the prior art, glass ceramics are insufficient in strength and transparency and cannot meet the requirements of electronic device protection glass cover plates are solved.

The invention relates to the technical field of fiber fabrics, in particular to a negative ion antibacterial polyester fiber fabric and a preparation method thereof. The problems that a polyester fiber fabric is low in mechanical strength and poor in lasting antibacterial performance are solved. Synthetic raw materials of the anion antibacterial polyester fiber fabric comprise composite anion powder, a composite antibacterial agent, an improved dispersing agent, a coupling agent mixture, terephthalic acid, ethylene glycol and a catalytic promoter. Negative ions of the fabric can be continuously released by controlling the proportion and the particle size of the components in the composite negative ion powder; the continuous antibacterial ability of the fabric is improved by changing the dosage of the composite negative ion powder and the composite antibacterial agent; the bursting strength of the fabric is improved by preparing the mixture of the improved dispersing agent and the coupling agent; the wear resistance of the fabric is improved by controlling the parameter conditions of synthesizing the ethylene glycol terephthalate and the time and temperature of polycondensation; the elongation at break of the fabric is improved by controlling parameter conditions in the spinning process.

The invention relates to the technical field of ball mills, in particular to a gold ore production ore ball mill with adjustable feeding amount, which comprises a base, the base is used for supporting the whole ball mill component, the top of the base is fixedly connected with a driving motor, and the output end of the driving motor is fixedly connected with a driving gear; according to the ore grinding machine, the feeding assembly, the protruding block and the top plate are arranged, so that a screen can do reciprocating motion in the feeding hopper, ore materials added into the feeding hopper are screened, and the granularity of the ore entering the ball grinding machine is more uniform; therefore, invalid work of the ball mill can be reduced, grinding efficiency is improved, grinding time is shortened, and energy consumption is reduced. Overlarge ore particles may cause excessive wear and impact on a lining and a grinding medium of the ball mill, and even cause equipment failure; the damage can be reduced by screening in advance, the service life of the ball mill is prolonged, and the maintenance cost is reduced.

The invention relates to a sounding rocket axial attitude stability control device based on a momentum wheel set, and belongs to the technical field of aerospace equipment. The device comprises a nine-axis attitude sensor, a high-precision barometer, a first-order servo momentum wheel, a second-order servo momentum wheel and a core controller. The nine-axis attitude sensor, the high-precision barometer and the core controller are integrated in an aluminum packaging box and are connected with the momentum wheel set through aviation plug wires. According to the device, feedback output acts on the momentum control wheel set through fusion calculation of sensor data, the momentum control wheel set outputs corresponding target torque, and stable control over the axial attitude of the aircraft is achieved. The aircraft attitude control system has quick response capability, has the advantages of low energy consumption and low self-weight structure, and enhances the accuracy and stability of aircraft attitude control. The advantage of electric energy storage is utilized, the system does not need to be equipped with a pressure tank, lightweight design is achieved, and meanwhile the compactness and attitude control efficiency of a rocket body are improved.

The invention relates to a non-combustible spraying polyurethane material for a refrigeration house and a preparation method thereof, the non-combustible spraying polyurethane material for the refrigeration house is composed of a component A and a component B. The volume ratio of the component A to the component B is 1: 0.9-1.7, the component A is prepared from the following components in parts by weight: 15 to 70 parts of polyether polyol composition, 15 to 70 parts of flame-retardant polyether polyol, 15 to 70 parts of flame-retardant polyester polyol, 20 to 45 parts of flame retardant, 0.5 to 3 parts of foam stabilizer, 0.2 to 2 parts of chemical foaming agent, 10 to 30 parts of physical foaming agent and 6 to 16 parts of catalyst; and the component B is prepared from 123 to 333 parts of polymethylene polyphenyl polyisocyanate. The non-combustible polyurethane foam formed by effectively matching the components such as the polyether polyol II, the polyether polyol III, the polyester polyol, the catalyst and the foaming agent and mixing and spraying with the polymethylene polyphenyl polyisocyanic acid has the characteristic of high flame retardance.

An X-ray image acquisition device includes a pixel unit having M pixel arrays each including N pixel portions (N and M are integers of 2 or more), M circuit units, and a control unit. Each circuit unit includes T (T is an integer of N or more) adding sections that sequentially add electrical signals corresponding to output signals from the N pixel portions and a switch section for switching connection states between the N pixel portions and the T adding sections. The control unit switches the connection states in synchronization with the transportation of an object along a first direction so that the electrical signals corresponding to the output signals output from the pixel portions by detecting X-rays transmitted through the same region of the object are added by the same adding sections.

This invention relates to machining tools and surface finishing methods using the DL (deep-drilling) method, the tools comprising ceramic-metal composites with uniformly polished surfaces. In some embodiments, the machining tool exhibits compressive stress less than -500 MPa after polishing, or equal to or greater than 40% of the compressive stress generated during the grinding process. In some embodiments of the invention, the machining tool has a uniformly polished surface along the cutting edge, i.e., perfect flatness between the metal and ceramic components of the tool, such that the roughness of the cutting edge is in the sub-micron range. In some cases, the machining tool has a roughness variation along the cutting edge and adjacent surfaces along the tool's uniform or regular cutting edge.

The invention discloses a tailoring device with a limiting structure for textile fabric processing, and relates to the technical field of textile fabric processing.The tailoring device comprises a main body, a limiting assembly, a power source, a processor, heat dissipation holes and an operation panel, the limiting assembly is connected with the processor through a signal line, and the operation panel is connected with the processor through a signal line; a limiting assembly is installed on the upper side of the outer wall of the body, a power source is installed on the lower side of the inner wall of the body, a processor is installed on the lower side of the inner wall of the body, heat dissipation holes are formed in the two sides of the outer wall of the body, and an operation panel is installed on the left side of the outer wall of the body. According to the textile fabric tailoring device, by installing the limiting assembly, the function of moving along with a textile fabric in the tailoring process of the textile fabric and limiting is achieved, the problem of distortion in the tailoring process of the textile fabric is solved, deformation in the tailoring process of the textile fabric can be prevented, the yield of tailoring processing of the textile fabric is increased, and the tailoring processing efficiency of the textile fabric is improved. And the subsequent manual processing cost is reduced, and the economic effect is improved.

The utility model discloses an industrial waste residue composite cementing material preparation system which comprises a first calcining furnace, a kaolin feeding hole and a bauxite feeding hole are formed in the first calcining furnace, the first calcining furnace is connected with a first mixing kettle, and a coal ash feeding hole and a 10% sodium hydroxide solution feeding hole are formed in the first mixing kettle; the outlet end of the second calcining furnace is connected with the inlet end of the dehydrating tower, the outlet end of the dehydrating tower is connected with the inlet end of the second calcining furnace, the second calcining furnace is provided with a sodium dihydrogen phosphate feed port and a urea feed port, and the second calcining furnace is connected with the second mixing kettle; the second mixing kettle is provided with a red mud feeding hole, a coal gangue feeding hole, a metallurgical slag feeding hole and a glass water feeding hole; and the second mixing kettle is sequentially connected with the air furnace, the grinding kettle and the finished product bin. According to the utility model, the stockpiling of industrial solid wastes can be reduced, the environmental pollution can be effectively reduced, and the problem of infrastructure material shortage can be effectively relieved on the premise of ensuring the engineering quality.

The utility model provides an agricultural transparent paper film. The agricultural transparent paper film comprises a paper film body, an upper coating is arranged on the upper surface of the paper film body, and a lower coating is arranged on the lower surface of the paper film body. The upper coating is provided with a waterproof coating; and the lower coating is a fertilizer coating. The paper film body is made of carbohydrate raw materials and is easy to degrade and more environmentally friendly, meanwhile, the fertilizer coating is arranged on the lower coating, crops absorb fertilizer in the fertilizer coating, and fertilizer use of the crops can be reduced.

The invention discloses a piezoelectric heterogeneous substrate, a preparation method and a semiconductor device, the piezoelectric heterogeneous substrate comprises a substrate layer, a dielectric layer, a patterned electrode layer and a piezoelectric film layer, the dielectric layer is located between the substrate layer and the piezoelectric film layer, the patterned electrode layer is located in the dielectric layer, and one side of the patterned electrode layer is exposed to the dielectric layer and is electrically connected with the piezoelectric film layer; the piezoelectric thin film layer is provided with a first surface and a second surface which are deviated from each other, the first surface is an original exposed surface of the piezoelectric heterogeneous substrate for forming the piezoelectric thin film layer, the first surface is positioned on one side, deviated from the substrate layer, of the piezoelectric thin film layer, and the second surface is formed by thinning one side, deviated from the original exposed surface, of the piezoelectric wafer substrate. The sacrificial protection structure is adopted to form the piezoelectric thin film layer, a high-temperature process is completed before the patterned electrode layer and the dielectric layer are formed, stress caused by thermal mismatch in the subsequent preparation process is reduced, and the morphology accuracy, reliability, stability and durability of the piezoelectric heterogeneous substrate are improved.

The application discloses a shear connector, a steel-concrete composite beam containing the shear connector and a construction method of the steel-concrete composite beam. The shear connector comprises an inverted truncated cone type cylinder (7), a stiffener, a cover plate, a penetrating steel bar (8) and a high-strength bolt (21); the stiffener comprises an integrally formed stiffener bottom plate (13) and a stiffener side plate (14), the size of the stiffener bottom plate is consistent with the size of the lower opening of the cylinder, and the stiffener bottom plate is attached to the lower opening of the cylinder; the stiffener bottom plate is provided with a second connecting hole for connecting the high-strength bolt; the stiffener side plate is arranged around the stiffener bottom plate and is attached to the inner wall of the cylinder; the height of the stiffener side plate is lower than that of the first connecting hole; the cover plate covers the upper opening of the cylinder; the penetrating steel bar transversely passes through the cylinder through the first connecting hole and leaves a connecting section on each side of the cylinder; and the high-strength bolt connects the stiffener bottom plate through the second connecting hole. The application realizes the disassembly and replacement of each component of the shear connector and the prefabricated bridge deck; and the structure form and stress performance of the shear connector are optimized.

The invention discloses a preparation method of a pavement material based on an alkali-activated fly ash glass body, and relates to the technical field of road engineering materials and hazardous waste treatment. The method comprises the following steps: mixing fly ash with water, removing soluble ions, mixing with a nano material, carrying out melting treatment, and rapidly cooling in a magnetic field environment to obtain a fly ash glass body; performing heat treatment on the sintered red mud to obtain heat activated red mud; preparing a dry material comprising a gel material and aggregate, wherein the gel material is composed of a fly ash glass body and thermally activated red mud; mixing the alkali activator, the water reducer and the nanofiber, and uniformly stirring to obtain a homogeneous solution; and adding the homogeneous solution into the dry material, and uniformly mixing to obtain the pavement material slurry. According to the invention, deep dissolution and recombination of the fly ash vitreous body and the thermally activated red mud are promoted by using an alkali excitation technology, elements are promoted to be rearranged on a molecular level, an aluminosilicate network structure with high strength and durability is formed, heavy metals are effectively fixed, and reduction and recycling of the fly ash and the red mud are realized.

The invention relates to the technical field of film covering equipment, in particular to a color box surface film covering device which comprises a film covering machine body, the upper surface of the film covering machine body is rotationally connected with a first conveying belt, the upper surface of the film covering machine body is rotationally connected with a second conveying belt, and the middle of the film covering machine body is rotationally connected with a heating roller. The position of the color box can be flexibly corrected through the correcting assembly, the film covering position is accurate, waste of raw materials is avoided, in addition, dust removal can be conducted on the outer surface of the color box, flexible rolling cleaning can penetrate into textures and gaps on the surface of the color box, pollutants such as dust and impurities can be effectively removed, and the working efficiency is improved. According to the glue spreading device, the distance between glue spreading rollers can be adjusted through the glue spreading assembly, adjustment can be conveniently conducted according to the glue spreading amount, relative inclination of the glue spreading rollers can be found in time, the glue spreading rollers can be conveniently maintained, and toxic gas can be concentrated through the exhaust assembly and prevented from being scattered in the working space to damage workers.

The invention relates to the technical field of medicine detection, and particularly discloses a method for detecting an antioxidant in butanedisulfonic acid ademetionine for injection. The method comprises the following steps: firstly, dissolving an ademetionine butanedisulfonate sample for injection in a solvent for injection for pretreatment, passing through a C18 solid-phase extraction column, and eluting with methanol, so that the antioxidant in the ademetionine butanedisulfonate sample for injection can be fully extracted, and the recovery rate is relatively high; then a C18 chromatographic column with a specific specification is adopted to carry out liquid chromatographic analysis on the test solution, and accurate detection of the antioxidant and the content of the antioxidant in the methionine butanedisulfonate for injection is realized at the same time; by limiting the conditions of the ultrahigh liquid chromatography, the peak response intensity of the test solution and the reference solution is improved, so that the detection precision is improved. The detection method can provide data support for the effective control of the quality of the ademetionine butanedisulfonate for injection, and ensures the safety of clinical medication.

The present invention provides an odor adsorption material, adsorption system and preparation method for a landfill, which can efficiently absorb H2S in a landfill. An odor adsorption material for a landfill, the raw material of which is a recycled fine aggregate prepared from recycled construction waste and recycled powder mixed with recycled fine aggregate, and the recycled construction waste contains quicklime or slaked lime. An odor adsorption system for a landfill, the system includes at least one intermediate adsorption subsystem and a topmost closure adsorption subsystem; the intermediate adsorption subsystem includes three functional layers, which are, from top to bottom, an upper gas collection layer, an odor adsorption layer II, and a lower gas collection layer; the closure adsorption subsystem includes six functional layers, which are, from top to bottom, a vegetation layer, a drainage layer, an impermeable layer, a drainage layer, an odor adsorption layer I, and a gas collection layer I, and the materials of the odor adsorption layer I and the odor adsorption layer II are the odor adsorption materials.

The application belongs to the technical field of excavator accessories, and provides a hidden lock buckle bucket tooth, which comprises a plurality of tooth seats, the tooth seats are detachably connected to a lip, and a locking assembly is arranged between the tooth seats and the lip; a tooth tip is detachably connected to one end of the tooth seat away from the lip, and a hidden lock buckle is arranged on the tooth seat, and the tooth tip is detachably connected with the tooth seat through the hidden lock buckle. The bucket tooth can be conveniently and quickly replaced.

The utility model relates to bridge engineering technical field, and disclose a kind of steel box girder and concrete pier column consolidation structure, including steel box girder, concrete pier column, shear nail and the adjusting member for adjusting the elevation of steel box girder installation, concrete pier column top is reserved with shear key, steel box girder bottom is equipped with for with concrete pier column top socket joint connection's notched, concrete pier column top outer circumferential wall is equipped with the slope of being inserted easily, concrete pier column top is inserted in the inside of notched, adjusting member includes jacking corbel and jack, jacking corbel is connected by bolt with the reserved planting bar on the outer wall below concrete pier column, jack is installed in jacking corbel top, jack top and steel box girder bottom are abutted. The present application is simple in structure, high in precision of factory prefabrication, force transmission is direct in socket design, stress concentration is small, and the elevation of section member is accurately adjusted, convenient for construction, applicable to complex environment and large-span bridge.

The utility model discloses a vehicle-mounted zoom camera, which comprises a camera main body and a zoom lens, and the zoom lens comprises a vibrating membrane, a piezoelectric actuator and a light-transmitting substrate. The vibrating membranes are made of a polydimethylsiloxane material, two opposite large surfaces of the light-transmitting substrate are both connected with the edge of one vibrating membrane in a sealing manner, the vibrating membranes and the light-transmitting substrate form a cavity, the cavity is filled with light-transmitting liquid, and the light-transmitting liquid is filled in the cavity. The piezoelectric actuator is attached to the side, away from the light-transmitting substrate, of the vibrating membrane, and a through hole is formed in the attaching position of the piezoelectric actuator and the vibrating membrane. The zoom function is integrated to a single camera, and the focal length is adjusted by using the vibrating diaphragm and the piezoelectric actuator, so that the number of cameras is reduced, the AI and logic computing power requirements are reduced, and the system performance is optimized.

The utility model relates to the technical field of desulfurizing towers, and discloses a combined type glass fiber reinforced plastic columnar desulfurizing tower which comprises a desulfurizing module, a liquid box module is fixedly connected to the surface of one side of the desulfurizing module, and the desulfurizing module comprises a desulfurizing tower body. The surface of the side, away from the upper end of the center, of the inner wall of the desulfurizing tower body is fixedly connected with a gas-liquid separation cooler, and the surface of the side, close to the lower end of the center, of the inner wall of the desulfurizing tower body is fixedly connected with a filter screen plate; a second water pump is fixedly connected to the front side surface of the bottom end in the liquid box body, and the output end of the second water pump is fixedly connected with a second conveying pipeline. According to the utility model, under the mutual cooperation of the second water pump and the second conveying pipeline, a desulfurizing agent is conveyed to the ejector, so that the desulfurizing agent is combined with sulfides in waste gas, a desulfurizing effect is achieved, and then under the mutual cooperation of the demister and the gas-liquid separation cooler, flue gas is discharged.

The utility model discloses a novel protection layer structure of a prefabricated vertical component, which relates to the field of concrete structure construction, the cross section of the structure is a component main body of a rectangular cylinder, a main framework support is arranged in the component main body, a groove is arranged on the side surface for accommodating a transverse steel bar, a curved surface reed is arranged at the opening of the groove, and U-shaped hooks inclined inwards are arranged at the two ends of the component main body. Materials of the main framework are selected according to the thickness of a vertical component, and a component body is filled with fine aggregate concrete or high-strength mortar. The working mechanism is as follows: firstly prefabricating the tire membrane, installing the main framework and the hook during cast-in-place, and pouring the filler. The structure can effectively avoid many defects caused by the fact that the protective layer is too thick or too thin, and compared with the prior art, the structure has the remarkable beneficial effects of guaranteeing structural stability, preventing steel bar corrosion, improving construction quality and structural performance and the like.

The invention provides a relay device for a vehicle, which can restrain a movable member from shaking at a standby position of the movable member pressed by a return spring. A relay device (4) for a vehicle is provided with: a movable member (11) having a conductor (13); electrode relays (14, 15) which are brought into a conductive state by bringing the conductor (13) into contact with the electrode relays (14, 15) by the movement of the movable member (11); an elastic member (17) that presses the movable member (11) in a predetermined direction; and a housing (8) that accommodates the movable member (11), in which a recess (19) into which the movable member (11) is fitted when the movable member (11) is pressed by the elastic member (17) is formed in the housing (8), and the recess (19) is provided with an inclined surface (19a) that is inclined with respect to the movement direction of the movable member (11) and that is in contact with the movable member (11).

The invention provides a steel slag-based building material and a preparation method thereof. The steel slag-based building material comprises a steel slag matrix, and a micro-dot array layer, a nano rough layer and a fluoride-free low-surface-energy interface layer are sequentially formed on the surface of the steel slag matrix; the micro-dot array layer comprises bulge structures which are distributed on the surface of the steel slag matrix in an array manner. According to the steel slag-based building material provided by the invention, the convex structures distributed in the micro-dot array layer in an array manner are compounded with the nano rough units in the nano rough layer, so that double-scale rough is formed, the surface layer adopts a low-interface-energy interface, the interface free energy and adhesion work of the surface of the building material are reduced, the friction performance of the building material is guaranteed, and the service life of the building material is prolonged. And low adhesion, hydrophobicity and durability of the steel slag-based building material are realized.

The invention belongs to the technical field of automobile parts, and discloses a gearbox suspension assembly which comprises a connecting support and a corbel support, a mounting hole is formed in the connecting support, a lining assembly is arranged in the mounting hole, first connecting holes are formed in the two sides of the connecting support, and the connecting support is made of a high polymer material; one end of the corbel support is connected with the lining assembly, a second connecting hole is formed in the corbel support, and the corbel support is made of high polymer materials. According to the gearbox suspension assembly, the connecting support and the supporting arm support are both made of the high polymer materials, the salt water corrosion resistance of the gearbox suspension assembly is determined by the characteristics of the high polymer materials, the possible corrosion problem of the gearbox suspension assembly is avoided, and compared with a gearbox suspension assembly made of common sheet metal parts or casting parts, the gearbox suspension assembly has the advantages of being simple in structure and convenient to use. The weight of the gearbox suspension assembly can be reduced by 30%-50%, the lightweight requirement of the gearbox suspension assembly is met, and positive influences on fuel economy, power and safety performance are achieved.

There is provided a woven fabric that can suppress a thickness reduction due to abrasion even under high-load and high-speed sliding conditions, has an excellent tribological property when used as a sliding material, hardly causes play between members, and can be used by being bonded to the base material; and also provided a woven fabric and a sliding material in which at least one of warp yarns and weft yarns includes doubled and twisted yarns of fluororesin fibers and para-aramid fibers, and the roughness on at least one surface where the doubled and twisted yarns are exposed is 1150 µm or less.

The invention discloses a carbon-doped hafnium nitride nanocrystalline film. The chemical formula of the carbon-doped hafnium nitride nanocrystalline film is HfCxN1-x, wherein the value of x ranges from 0.09 to 0.1. The invention also discloses a preparation method of the carbon-doped hafnium nitride nanocrystalline film, which adopts a magnetron co-sputtering method and specifically comprises the following steps: putting a pure hafnium target and a graphite target into a chamber, and vacuumizing to 4 * 10 <-4 > Pa; and continuously introducing nitrogen and argon into the chamber, controlling the sputtering current of the pure hafnium target and the graphite target, and depositing the HfCxN1-x film on the substrate. According to the invention, the C element is introduced into HfN, so that the hafnium carbonitride nanocrystalline film with extremely low infrared emissivity and excellent durability is prepared.