94results about How to "Reduce IR emissivity" patented technology

The invention discloses a radar and infrared compatible stealthy material and a preparation method thereof. The compatible stealthy material is mainly formed by compounding a radar wave absorbing structural layer and an infrared stealthy functional layer, wherein the radar wave absorbing structural layer is made of a glass fiber reinforced glass steel composite material; and the infrared stealthy functional layer is a capacitive frequency selective surface. The preparation method comprises the following steps of: preparing the capacitive frequency selective surface by a printed circuit board (PCB) process; preparing a layer of resistance sheet on glass fiber plain cloth by using conductive carbon slurry through a screen printing process; preparing the glass fiber reinforced glass steel composite material by using epoxy resin as a base material and the glass fiber plain cloth as a reinforcing material through a resin forming process; and curing to make the capacitive frequency selective surface compounded and superposed so as to obtain the radar and infrared compatible stealthy material. The compatible stealthy material has a simple structure and low cost, is convenient to prepare, and has the duplex characteristics of high reflection of an infrared wave band and high permeation of a radar wave band.

The invention discloses a novel infrared and radar integrated stealth fabric and a preparation method thereof. The stealth fabric comprises an infrared camouflage surface layer and an antistatic bottom layer in turn from outside to inside; the infrared camouflage surface layer comprises an infrared stealth layer, a fabric layer and a radar wave absorption attenuation layer in turn from outside toinside; the infrared stealth layer is compounded by using a coating coated by an infrared stealth coating and a magnetron sputtering ITO (indium tin oxide) film arranged on the surface of the coating; the radar wave absorption attenuation layer comprises a sponge body; and a wave absorption material is adsorbed on the sponge body. The stealth fabric can realize radar stealth function and infraredstealth function at the same time, has good integral wave absorption effect and low surface density of materials, and has good effects on the aspects of breaking strength, bursting strength and the like. Moreover, excessive complex processes are not adopted for manufacturing the stealth fabric, and the stealth fabric can be produced by using a conventional fabric production method, so the stealthfabric is convenient for production and easy for implementation.

The invention discloses a method for coating an infrared stealth coating on an object surface coated with a radar absorbing coating, and belongs to the technical field of a functional material. The method comprises the following concrete processes: 1, preparing each coating carrier of a corresponding infrared stealth coating, a component A of the infrared stealth coating and a component B of the infrared stealth coating; 2, cleaning the object surface coated with the radar absorbing coating; 3, mixing and evenly agitating a to-be-used inner coating carrier with the component A and the component B, and spraying on the surface of the radar absorbing coating by adopting a compressed gas manner, and drying; 4, sequentially taking the to-be-used coating carrier to mix and evenly agitate with the component A and the component B in a manner same as spraying of the inner layer, spraying and drying by adopting the compressed gas manner to the outermost layer. The method has the advantages that the infrared emitting ability can be reduced to below 0.25, meanwhile, the radar absorbing performance of the coating can be significantly improved within the full-band range of 1-18GHz, and excellent infrared/radar and stealth performances are achieved.

The invention relates to infrared camouflage paint as well as a preparation method and an application thereof. The paint comprises filler, a coating agent and an additive. The preparation method comprises the following steps: mixing and ball-milling 30-90 parts by weight of solvent, 1-30 parts by weight of wetting dispersant and 5-60 parts by weight of filler, so as to obtain lanthanum-based rare earth compound powder concentrated pulp, ball-milling the solvent and the coating agent so as to obtain the ball-milled coating agent, and ball-milling the solvent, the lanthanum-based rare earth compound powder concentrated pulp and the ball-milled coating agent so as to obtain the infrared camouflage paint. According to the application of the infrared camouflage agent, the infrared stealth coating is added to a substrate by using a dipping, coating or padding method. The invention provides a novel low-emissivity material, namely the infrared camouflage paint, not only are materials for the paint easy to obtain, but also the paint is simple to operate, relatively low in cost, capable of effectively pretending and shielding human bodies, glass, polymer films, military weapons and the like and reducing the possibility that the articles are detected by infrared detectors, and has a good application prospect.

The invention discloses a medium-and-low-temperature solar selective absorption thin film. The medium-and-low-temperature solar selective absorption thin film mainly comprises a diffusion blocking layer, an absorption layer and an anti-reflection layer, which are sequentially deposited on a substrate with an infrared reflection function, or the medium-and-low-temperature solar selective absorption thin film mainly comprises an infrared reflection layer, the diffusion blocking layer, the absorption layer and the anti-reflection layer, which are sequentially deposited on the substrate, wherein the infrared reflection layer comprises the components of copper (Cu), molybdenum (Mo) or silver (Ag); the diffusion blocking layer comprises the composite component of chromium and nitrogen; the absorption layer consists of one or two of chromium simple substance / chromium oxide multi-component phase and chromium simple substance / chromium oxynitride multi-component phase; and the anti-reflection layer is a silicon dioxide (SiO2) ceramic thin film. The medium-and-low-temperature solar selective absorption thin film is high in solar spectrum absorption rate, low in infrared emissivity, high in heat stability and high in weather resistance and can be used in medium-and-low-temperature atmospheric environment of below 278 DEG C for a long time. The invention also discloses a preparation method for the medium-and-low-temperature solar selective absorption thin film. The preparation method employs a magnetron sputtering method and is simple in process, low in cost, high in stability and applicable to industrial large-area preparation.

The invention discloses an antistatic artificial lawn which has long-term and effective antistatic performance and meets requirements of people on antistatic artificial lawns, and simultaneously, the invention also provides a preparation method of the antistatic artificial lawn. The antistatic artificial lawn comprises artificial grass, a bottom base fabric and stamp gum, wherein the artificial grass is antistatic artificial grass, and comprises the following components in parts by weight: 80-95 parts of base resin, 0-5 parts of color masterbatch, 0.1-5 parts of assistant and 1-10 parts of antistatic masterbatch.

The invention relates to the technical field of solar collectors, in particular to a solar selective absorption coating and a preparation method thereof. The high-performance multilayer composite solar selective absorption coating comprises a far infrared reflecting layer (2), a composite heat absorption layer (4) and an anti-oxidation and anti-reflection layer (5) which are arranged on a matrix (1) in turn. The coating is mainly characterized in that the far infrared reflecting layer (2) is an Al layer which is sputter-deposited on the matrix (1); the composite heat absorption layer (4) is a TiNOX layer which is sputter-deposited on the far infrared reflecting layer (2); and the anti-oxidation and anti-reflection layer (5) is an SiO2 layer which is sputter-deposited on the composite heat absorption layer (4). The coating has the advantages that the solar absorption rate is as high as 90 to 95 percent, and the infrared emitting rate is 6 percent. A Ti+TiC stability layer is arranged between the reflecting layer and the absorption layer, and the stability layer can remarkably improve the binding force of the coating; and simultaneously, the TiC has high temperature resistance and oxidation resistance, thereby the corrosion resistance and high temperature resistance of the coating can be remarkably improved.

The invention relates to a precise thermal control mechanism of a focal plane detector, and the precise thermal control mechanism comprises a vacuum box body, a refrigerating assembly, a cold screen assembly, a heating assembly and a temperature collecting unit, and the precise thermal control mechanism also comprises a heat insulating layer which is arranged at the outer side of the vacuum box body and the outer side of the heating assembly, the refrigerating assembly comprises a refrigerator substrate, at least one detector refrigerator, at least one cold screen refrigerator, a heat tube assembly and a heat radiation plate. Due to the adoption of the precise thermal control mechanism, the technical problems that the quick variation of the temperature under the same working mode is difficult to realize because the temperature control of the traditional photoelectric detector thermal control mechanism mainly depends on the passive heat radiation way can be solved, a way combining the initiative refrigeration and the initiative heating is adopted, by the reasonable design of a thermal control system structure, not only is the quick variation of the temperature of the detector realized to meet the temperature requirement under different working modes, but also the temperature range can be precisely controlled, and the working reliability of the system is high.

The invention discloses a radar-infrared compatible stealth material and also discloses a preparation method of the material. According to the preparation method, by adopting manners of primary ball milling and mixed ball milling, the required iron aluminum mixed material is finally obtained, the diameter of the platy material is 2-5mu m, and the thickness of the platy layer is 100-200nm. The preparation method is simple, and the prepared compatible stealth material also has very low infrared emissivity without changing the microwave absorbing property.

The invention discloses an optical transparent ultra-wideband radar and infrared double-stealth structure, and relates to the technical field of multi-spectrum stealth, and the stealth structure mainly comprises a low-emissivity infrared stealth layer and an ultra-wideband radar wave-absorbing layer. In order to realize high transmittance of visible light, an optical transparent material transparent conductive film and a transparent dielectric are selected in the overall structural design; the radar wave-absorbing layer adopts a conductive film-medium-conductive film sandwich type wave-absorbing structure; the transparent conductive film is etched into a frequency selective surface by adopting a laser etching process to finish the preparation of the radar and infrared compatible stealth material; the optical transparent ultra-wideband radar and infrared compatible stealth material has high designability, the contradictory problem of optical transparency, radar stealth and infrared stealth can be well solved from the perspective of structural design by adopting a metamaterial technology, and the optical transparent ultra-wideband radar and infrared compatible stealth material has good ultra-wideband radar wave absorption performance, low infrared emissivity and optical transparency.

The invention discloses a radar-infrared compatible stealth material with adjustable property and a preparation method thereof. The preparation method comprises the following steps of: placing 100 grams of steel balls, 10 grams of carbonyl iron powder, 0.01-0.1 gram of calcium stearate and 30-50 milliliters of acetone solutions into a ball milling jar together for ball milling; placing the carbonyl iron powder subjected to the ball milling into a degreasing fluid, and degreasing at the temperature of 50-70 DEG C for 8-10 minutes; placing the degreased carbonyl iron powder into a chemical plating solution, and plating the carbonyl iron powder at 30-75 DEG C under the pH value of 13-14 for 15-45 minutes; cleaning and drying a material subjected to chemical plating to obtain a needed composite material. The preparation method disclosed by the invention has the advantages of simpleness, easiness and convenience for process flow and low cost.

The invention discloses a pesticide packaging bottle and a preparation method thereof. The pesticide packaging bottle contains the following components (by weight): 40-50 parts of PE resin, 8-15 partsof LLDPE, 5.5-8.5 parts of nanometer tin antimony oxide, 0.7-1.4 parts of nano titanium dioxide, 5-10 parts of modified hollow glass beads, 1-3 parts of a cross-linking agent, 0.3-0.6 part of an antioxidant, 1-3 parts of butyl stearate, 1-3 parts of a compatilizer, 1-5 parts of a plasticizer, 1-3 parts of a reinforcing agent, and 5-10 parts of zinc borate. The preparation method comprises the following steps: S1: calcination; S2: melt blending extrusion; S3: vacuum reaction; and S4: blow molding. The pesticide packaging bottle of the invention has the advantages of good heat resistance and heat insulation, and high toughness and strength; in addition, the preparation method of the invention has the following advantages: the bottom of the prepared packaging bottle has no joint line, and the bottle body and the bottom are integrated as a whole.

The invention provides a fluorine-containing polyimide composite film material with a low infrared emissivity and a preparation method thereof. The composite material is prepared by adding 1 to 10% of nano inorganic substances into a fluorine-containing polyimide material, and the nano inorganic substances are actually crystal particles dispersed in the fluorine-containing polyimide. The experiment results show that the thermal stability, environment resistant performance, and low infrared emissivity property of the composite material containing the inorganic substances are all improved, especially the infrared emissivity is greatly reduced, so the provided material can be used to prepare infrared stealth materials having a high requirement on stability and has a good application prospect in the military and civilian fields.

The invention discloses a graphene containing infrared radar compatible stealth coating and a preparation method thereof. The graphene containing infrared radar compatible stealth coating comprises aresin system formed by mixing of resin, a solvent and an assistant, aluminum powder with conductivity and a radar wave reflection absorbent are dispersed in the resin system, and the radar wave reflection absorbent is composed of graphene with high dielectric constant and a magnetic absorbent. The dielectric properties of graphene are combined with electromagnetic properties of the magnetic absorbent to improve the reflection and absorption properties of the coating from two aspects of dielectric loss and electromagnetic loss, so as to achieve the effect of radar stealth' in addition, the graphene for radar absorption is dispersed among aluminum slurry particles in the resin system, the aluminum slurry particles are connected by the lamellar structure of the resin system to improve the conductivity of the coating, and low infrared emissivity is achieved; the coating can be used in high temperature radiation and radar bright spots of ships and warships, and can also be extended to ground equipment with high temperature position and radar stealth demand.

The invention relates to the technical field of high-temperature infrared stealth materials and particularly discloses a fiber-reinforced ceramic matrix composite surface antioxidant/infrared stealthcoating capable of resisting the temperature of 1650 DEG C. The infrared stealth coating is of a layered structure and comprises a ceramic inner layer, a ceramic middle layer, a ceramic outer layer and a low-infrared-emissivity functional layer from bottom to top, wherein the ceramic inner layer is a mullite layer, the ceramic middle layer is a rare earth silicate layer, the ceramic outer layer isan 8YSZ layer, and the low-infrared-emissivity functional layer is a coating with Pt as a conductive phase and Bi2O3 as a binding phase. The invention further provides a preparation method of the fiber-reinforced ceramic matrix composite surface antioxidant/infrared stealth coating capable of resisting the temperature of 1650 DEG C. According to the infrared stealth coating, the oxidation resistance and the high-temperature stability of the composite material are improved, the infrared radiation intensity of a base material can be remarkably reduced, and the infrared stealth coating has excellent oxidation resistance and an infrared stealth function.

The invention provides a preparation method of an infrared stealth textile coating fabric. According to the method, a printing layer, a surface layer, a thermal-insulating layer, a bonding layer and a base cloth layer are laminated together; the method specifically comprises the following steps: step one, scrape coating the surface layer on release paper by using the scraper of a coating machine, and drying in an oven; step two, scrape coating the thermal-insulating layer on the surface layer by using the scraper of the coating machine, foaming and curing in the oven, cooling to the temperature below 50 DEG C after drying; step three, scrape coating the binding layer on the thermal-insulating layer by using the scraper of the coating machine, drying in the oven and cooling to the temperature below 50 DEG C after the drying; step four, laminating the base cloth on the bonding layer, and stripping the release paper; step five, transferring the printing layer onto the surface layer by using the anilox roller of a printing machine, drying by using the oven, and cooling to the temperature below 50 DEG C after the drying. According to the preparation method provided by the invention, the preparation process is simple, the cost is low, and the prepared fabric has the softness of textiles, can prevent rain and corrosion, can be used both on sunny days and slushy days, and has stealth and warmth retention effects.

The invention relates to a rare earth doped nano indium tin oxide infrared stealth coating. SnCl4, InCl3 and ErCl3 are adopted at a molar ratio of 0.4-1.2:10:0.08-0.12, and rare earth doped nano indium tin oxide powder is prepared by a liquid phase chemical coprecipitation method. The rare earth doped nano indium tin oxide powder is modified by silane coupling agent KH570, and the amount of KH570is 4%-8% of the mass of the rare earth doped nano indium tin oxide powder; the modified rare earth doped indium tin oxide powder is dispersed in absolute ethanol at a ratio of 1 g/ml, mixed with polyurethane, and sprayed on an aluminum substrate to obtain the infrared stealth coating, and the mass ratio of the indium tin oxide to the polyurethane is 1-2:3. The preparation process is simple, and the infrared stealth coating has low density, low infrared reflectivity, high transparency and good physical, mechanical and chemical properties.

The invention discloses a preparation method and application of a composite microcapsule phase change material with double functions of heat storage, temperature control and infrared stealth. Stearicacid is mainly used as a core material, calcium carbonate is used as a wall material, a nano ferromagnetic material is doped at the same time, and the difunctional composite microcapsule phase changematerial with a core-shell structure is prepared by adopting an in-situ polymerization method, the difunctional composite microcapsule phase change material is processed into an interlayer, a hollow part of clothes is coated with the interlayer by adopting a coating treatment mode, and a heat storage and temperature control-infrared stealth nocturnal clothing. For more simply illustrating, the interior of a mask is coated with the composite microcapsule phase change material, and the infrared stealth performance of a mask person-wearing area and other areas is tested and compared.