24results about How to "High emissivity" patented technology

This solution relates to the coatings field and proposes an aqueous nano-dispersion of far-infrared negative oxygen ion material. By weight, it comprises: 300-350 parts water; 35-45 parts wetting agent; 40-60 parts dispersant; 25-35 parts defoamer; 35-45 parts multifunctional additive; 5-7 parts thickener; 400-600 parts activated far-infrared negative oxygen ion material; 1-3 parts accelerator; and 3-5 parts shielding agent. This solution designs a multi-component synergistically promoting activated far-infrared negative oxygen ion material, which can improve the hemispherical spectral emissivity in the 4-14μm band, even reaching above 0.95 in the key 8-12μm band, effectively promoting formaldehyde decomposition with a long-lasting effect, while also improving antibacterial properties.

The invention relates to the technical field of polymer dispersed liquid crystal, and discloses a perovskite quantum dot / polymer dispersed liquid crystal film and a preparation method thereof, and the method comprises the following steps: preparing a toluene solution of perovskite quantum dots, and adding dithiol as a ligand to carry out surface modification on the perovskite quantum dots to obtain a perovskite quantum dot / polymer dispersed liquid crystal film; cleaning by using a mixed solvent of toluene and ethyl acetate in a volume ratio of 1: 2-2: 1, and centrifuging to obtain surface-modified perovskite quantum dots; uniformly mixing the surface-modified perovskite quantum dots with an ultraviolet polymerizable monomer, a cross-linking agent, liquid crystal and an ultraviolet initiator, injecting the mixture into a liquid crystal box, and performing ultraviolet curing to obtain the perovskite quantum dot / polymer dispersed liquid crystal film. The perovskite quantum dot / polymer dispersed liquid crystal film with enhanced long-wave infrared emissivity, fluorescent pattern and information encryption, provided by the invention, has wide application prospects in liquid crystal display, intelligent glass, energy-saving building materials, automobile decoration and related fields.

This application relates to the field of infrared remote sensing instrument calibration technology, and provides a high-dynamic-range, large-aperture, high-precision on-board blackbody radiation source and its temperature control method. The main body of this on-board blackbody radiation source is temperature-controlled by a refrigerator, exhibiting a large dynamic range, capable of temperature control from 200K to 310K. Through a three-layer structure consisting of the radiation source cavity, a cooling inner shell, and an outer shell, zoned temperature control via a heat transfer bracket, and a three-layer thermal insulation installation design, the temperature uniformity and stability of the blackbody radiation source are significantly improved, with temperature uniformity exceeding 30mK. Simultaneously, it possesses high emissivity (spectral emissivity reaching 0.998) and an aperture as large as 310mm, meeting the requirements for large field-of-view, long-distance use.

This invention discloses a surface-source blackbody structure with a multi-level composite cone structure and its fabrication method, belonging to the field of microstructure optical design and fabrication technology. This invention forms a multi-level composite absorbing unit by setting a periodically arranged first-level main cone structure on a basic support structure, and further constructing a second-level secondary cone structure array with gradient characteristics on its top platform. This not only increases the optical path and multiple internal reflections, but also matches different wavelengths through gradient dimensions. Since the secondary cone array contains multiple scales, energy is absorbed step by step during the transmission process from the outside to the inside; simultaneously, it can achieve efficient absorption over a wide wavelength range and large angles, thus structurally realizing a near-ideal planar blackbody target surface, which is beneficial for promoting its integrated application in infrared calibration, thermal imaging system calibration, and space remote sensing.

The invention relates to the technical field of water-based radiation refrigeration coatings, and discloses a water-based radiation refrigeration coating composition and a preparation process thereof, the water-based radiation refrigeration coating composition comprises a component A and a component B, the component A is prepared from the following raw materials in parts by weight: 10 to 15 parts of a water-based substrate, 8 to 12 parts of a multi-effect cosolvent, 55 to 65 parts of radiation refrigeration functional filler, 10 to 20 parts of emulsion, 0.1 to 0.8 part of a hydrophobic auxiliary agent, 0.1 to 0.8 part of a wetting agent and 0.3 to 1 part of a thickening agent, and the multi-effect cosolvent is prepared from a dispersing agent, a defoaming agent and a first solvent; and the component B comprises the following raw materials in parts by weight: 65-75 parts of a curing agent and 25-35 parts of a second solvent. The water-based radiation refrigeration coating composition has good cooling performance, weather resistance and protection performance.

A dual mode glass for a window includes a glass substrate having a first side and a second side, a first member disposed on the first side of the glass substrate, and a second member disposed on the second side of the glass substrate. Wherein the first component and the second component are configured to enable the dual-mode glass to present a first transmissivity / emissivity mode for light rays incident on the first side and to present a second transmissivity / emissivity mode for light rays incident on the second side. The dual-mode glass is extremely suitable for different weather conditions due to different spectral characteristics on the two sides so as to maintain indoor comfort.

A method for preparing white stable lignin and its application are disclosed. This invention addresses the limitations of existing lignin decolorization processes, which are constrained by long decolorization times and difficulty in maintaining color stability under ultraviolet light stimulation after decolorization, thus failing to meet the low absorption requirements of radiative cooling materials in the visible light band. The method includes: 1. Preparation of DES; 2. Preparation of lignin solution; 3. Modification of lignin; 4. Bleaching; 5. Preparation of white stable lignin. Application: It is used in the preparation of refrigeration materials.

The invention provides a method for improving the binding force of an inorganic thermal control coating on the surface of a carbon / carbon composite material, which comprises the following steps: placing the carbon / carbon composite material in absolute ethyl alcohol, and carrying out ultrasonic cleaning and drying to finish ultrasonic cleaning; laser is adopted to continuously scan the surface of the carbon / carbon composite material, and laser cleaning is completed; spraying a surface treating agent on the surface of the carbon / carbon composite material subjected to laser cleaning; and spraying the inorganic thermal control coating on the surface of the carbon / carbon composite material sprayed with the surface treating agent, drying in the shade, curing, and forming the inorganic thermal control coating on the surface of the carbon / carbon composite material. According to the method, the binding force of the inorganic thermal control coating on the surface of the carbon / carbon composite material is improved through ultrasonic cleaning, laser cleaning and the bridging effect of the surface treating agent.

The invention belongs to the field of wave-absorbing materials and electromagnetic protection materials, and particularly relates to a perovskite material with microwave absorption and radiation heat dissipation functions and a preparation method and application thereof. The perovskite material provided by the invention has a chemical formula shown as the following: Sr < x > Co < y > M < z > On, m is one or more of La, Ce, Sm, Gd, Er and Lu; 0.2 < = x < = 1.2; 0.2 < = y < = 1.0; z is 0 < = z < = 0.2; 1 < = n < = 3. The perovskite material disclosed by the invention has an adjustable strong absorption characteristic in a microwave frequency band of 1-18GHz, the spectral emissivity of the perovskite material in an infrared band of 1.5-25mu m at room temperature is greater than 90%, the perovskite material shows the characteristics of high infrared emissivity and low microwave reflection loss, and the perovskite material can still keep stable performance at high temperature; the material has wide application prospects in thermal management and electromagnetic protection materials of mobile communication base stations and wave-absorbing materials of aerospace crafts.

The present application relates to a kind of thermochromic multiband compatible infrared stealth film and its preparation method and application, belong to infrared stealth film technical field.To solve the problems of existing infrared stealth material preparation process complex, high cost, narrow application, the present application provides a kind of thermochromic multiband compatible infrared stealth film, from top to bottom in turn for ZnS material layer, VO2 Material layer, Si material layer and Ag substrate layer.The infrared stealth film of the present application has the characteristics that infrared emissivity decreases with temperature rise, can be reversibly adjusted according to the change of ambient temperature Film emissivity, with 3~5 μm and 8~14 μm dual infrared band stealth function, in non-infrared detection band 5~8 μm band has higher emissivity, can realize the heat dissipation function of stealth target in this band.The infrared stealth film of the present application has the characteristics of simple structure and convenient preparation method, and the film can be large-area covered on target surface, which is conducive to large-scale promotion.

This invention discloses a black radiation-cooling thin film and its preparation method. The thin film comprises, from bottom to top, a substrate Sub, a black reflective module, and a radiation module. The structure of the black reflective module, from bottom to top, is MD1AD2, where M is a metal layer, D1 is a first dielectric layer, A is a visible light absorption layer, and D2 is a second dielectric layer. The structure of the radiation module, from bottom to top, is (A'1A'2A'3). s L, where A'1, A'2, and A'3 are the first, second, and third absorption layers, respectively, which have absorption in the 8μm-13μm band and high transmission in the 0.3μm-2.5μm band; L is a low refractive index protective layer; and s is the number of stacked periods, s≥1. This invention achieves good cooling performance while maintaining a black color.

This application relates to the field of waterborne ceramic coatings, mainly to a waterborne ceramic composition with normal total emissivity and antibacterial effect, its preparation method, and its application. A waterborne ceramic composition with normal total emissivity and antibacterial effect comprises the following raw materials: modified nano-zinc oxide silica sol matrix, silane coupling agent, acid catalyst, compound high-emissivity filler, additives, and water; the raw materials for preparing the modified nano-zinc oxide silica sol matrix include modified nano-zinc oxide alcohol solution, organosilicon monomer, and silica sol; the raw materials for preparing the modified nano-zinc oxide alcohol solution include nano-zinc oxide, silane coupling agent containing terminal amino groups, and mixed solvent; the compound high-emissivity filler is a combination of silicon carbide, iron oxide black, and graphene. This application can fundamentally solve the problems of nano-zinc oxide agglomeration, poor compatibility, and insufficient emissivity, effectively achieving a comprehensive effect of high antibacterial properties, high emissivity, high stability, and rapid curing.

The application discloses a kind of trajectory prediction-based urban mobile charging pile migration method.The method obtains the position information of user terminal dispersion, constructs trajectory embedding sequence after vectorization processing, obtains the trip trajectory table based on trajectory embedding sequence.The historical trajectory T of user in trip trajectory table is segmented into n segment trajectories, trajectory grouping is carried out with segment trajectory similarity, the address preference probability of user in different group is determined, the complete trajectory of user is predicted according to the address preference probability and trajectory confidence of user charging, the site expectation value of any user route subinterval is determined according to complete trajectory, and the highest expected place in trip trajectory table is selected as the recommended urban mobile charging pile site location.The application also discloses a kind of migration system for realizing trajectory prediction-based urban mobile charging pile migration method.

The application relates to the technical field of coatings, and discloses a modified aerogel, a preparation method thereof and application of the modified aerogel in radiation refrigeration coatings. The method comprises the following steps: in the presence of water, a solubilizer and an acid catalyst, performing a hydrolysis reaction on a silicon source to obtain a silica sol; in the presence of an alkali catalyst, performing a gelation reaction on the silica sol and rare earth oxide with a linear average particle size of 10-100 nm to obtain a modified wet gel; performing normal-pressure drying on the modified wet gel to obtain the modified aerogel; and controlling the addition amount of the rare earth oxide and the conditions of the normal-pressure drying, so that the content of the rare earth oxide in the modified aerogel is 0.5-1 wt%. The coating prepared from a radiation refrigeration composition containing the modified aerogel prepared by the application has the characteristics of high solar reflectivity and high atmospheric window emissivity.

A beta ray three-dimensional emission source with high emissivity, comprising a flexible substrate with a three-dimensional pyramid structure, a high polymer adhesion layer on the surface of the flexible substrate, and metal particles on the high polymer adhesion layer 63 The Ni particles are adsorbed on the surface of the flexible substrate; the preparation method comprises the following steps: obtaining a substrate with a three-dimensional pyramid structure on the surface, modifying a high polymer adhesion layer on the obtained substrate with a three-dimensional pyramid structure on the surface, and obtaining a three-dimensional beta ray emission source with high emissivity; application: used for being arranged on the surface of a micro beta battery converter, and continuously emitting beta rays through the three-dimensional structure 63 The Ni metal layer continuously decays and continuously emits beta rays; the beta radiation battery has the characteristics of low output power, high energy conversion efficiency, high energy density, high raw material utilization rate, wide application scene, and low reaction temperature.

This invention provides a method for enhancing radiative heat transfer on the surface of chromium-molybdenum steel and a radiation-enhanced chromium-molybdenum steel metal component, comprising the following steps: Step 1 is to pretreat the chromium-molybdenum steel substrate and then clad a nickel-aluminum alloy onto the surface of the pretreated chromium-molybdenum steel substrate to form a nickel-aluminum transition layer; Step 2 is to coat the surface of the nickel-aluminum transition layer with a nickel-aluminum rare earth material to form a nickel-aluminum rare earth composite layer; Step 3 is to coat the surface of the nickel-aluminum rare earth composite layer with a rare earth radiating material to form a rare earth infrared radiating layer; Step 4 is to cure the product obtained in Step 3. The radiation-enhanced chromium-molybdenum steel metal component of this invention achieves a smooth transition of thermal expansion coefficients through a gradient multilayer structure. The linear expansion coefficient of the nickel-aluminum transition layer is between that of the chromium-molybdenum steel substrate and the rare earth radiating layer, and it can absorb some thermal stress through its own plastic deformation, significantly alleviating the coating cracking and peeling phenomena caused by differences in thermal expansion.

The application discloses a transparent heat-insulating energy-saving window film master batch and a preparation method and window film thereof. The transparent heat-insulating energy-saving window film master batch comprises nanometer fluorinated tungsten bronze powder, polydimethylsiloxane, a dispersing agent and a polymer carrier. The nanometer fluorinated tungsten bronze powder is a core-shell structure composed of nanometer tungsten bronze particles externally grafted with fluorine-containing silane. The molecular structure of the nanometer tungsten bronze is M x WO3, 0.01<=x<=0.30, the mass ratio of the fluorine-containing silane and the nanometer tungsten bronze powder is 1:201:15. The fluorination modification of the surface of the nanometer tungsten bronze can improve the agglomeration of the nanometer tungsten bronze, ensure that the particle size of the modified powder is less than or equal to 100 nm in the plastic product, improve the infrared blocking rate and the visible light transmittance, improve the 8-13 mu infrared emissivity, and make the nanometer tungsten bronze have the effect of radiating heat. Meanwhile, by controlling the mass ratio of the fluorine-containing silane and the nanometer tungsten bronze, the compatibility of the powder in the polymer carrier can be improved, and the powder has high 8-13 mu infrared emissivity.

The invention provides an MEMS infrared light source, an MEMS packaging structure and an MEMS infrared light source packaging method, and the MEMS infrared light source comprises a substrate which is provided with a cavity; the supporting layer comprises a fixing part and a bearing part, and the fixing part is connected with the base; the bearing part is provided with through hole parts in the thickness direction of the supporting layer in a penetrating mode, cantilever parts are formed between the adjacent through hole parts, the bearing part further comprises a supporting part, the supporting part is connected with the fixing part through the cantilever parts, and the supporting part and the cavity are oppositely arranged. The electrode resistance layer is arranged on the side, away from the cavity, of the supporting part; the electrode resistance layer comprises a connecting part and a heating part, the connecting part is connected with the supporting part, and the connecting part is arranged around the heating part; and the nano radiation layer is arranged on one side, deviating from the supporting part, of the heating part. The power consumption of the MEMS infrared light source can be reduced, and the working efficiency of the MEMS infrared light source can be improved.

The application discloses a kind of low noise displacement module based on vacuum negative pressure magnetic drive, including rigid shell, flexible vibration isolation suspension system, high vacuum isolation inner container, drive motor, non-contact magnetic coupling transmission component, self-lubricating guide screw and counterweight / load slider;High vacuum isolation inner container is coaxially suspended in rigid shell by flexible vibration isolation suspension system;Drive motor is installed between rigid shell and high vacuum isolation inner container;Self-lubricating guide screw is installed inside high vacuum isolation inner container;Counterweight / load slider is installed on self-lubricating guide screw;The driving magnetic ring of non-contact magnetic coupling transmission component is located outside high vacuum isolation inner container, and is connected with the output shaft of drive motor, driven magnetic ring is installed inside high vacuum isolation inner container, and is coaxially connected with the input end of self-lubricating guide screw, realizes the non-contact penetration transmission of magnetic moment.The application can completely isolate noise transmission, realize physical level mute operation, and solve vacuum dry friction and heat dissipation problem.

The application discloses an anti-aging, high-reflecting and high-emitting fabric screen printing coating, which is composed of 30 parts of rare earth slurry, 40 parts of polyurethane resin, 5-10 parts of additives and 20-30 parts of water in terms of weight; the rare earth slurry is composed of 10-15 parts of aluminum oxide, 10-15 parts of barium oxide, 25-36 parts of niobium oxide, 13-20 parts of rare earth oxide and 16-35 parts of titanium oxide in terms of weight. The white fabric dye is green and environment-friendly, is coated on the surface of the fabric, and can reduce the temperature by more than 4 DEG C during the day.

The application discloses a composite powder reinforced radiation refrigeration coating and a preparation method thereof, and relates to the technical field of coating.The multistage surface modification functional powder, the water-based polyurethane resin and the polyisocyanate curing agent are used, the problems of unbalanced radiation refrigeration performance, slow drying speed, poor mechanical performance and environmental stability, and insufficient weather resistance of the existing coating are solved, the application scenarios of efficient cooling, weather resistance, corrosion resistance and long-term stable service are met, and the coating can be widely applied to the fields of building outer walls, metal components, cold chain equipment, outdoor facilities and the like.

This invention provides a three-dimensionally highly conductive radiation-cooled composite material, its preparation method, and its applications, relating to the field of radiation-cooled energy-saving composite materials. The three-dimensionally highly conductive radiation-cooled composite material comprises: a foamed metal and a polymer for radiation cooling filling the pore structure of the foamed metal. The radiation-cooled composite material of this invention exhibits three-dimensional high conductivity while achieving efficient electron transport, effective sunlight reflection, and optimal mid-infrared emission.

This invention discloses a mid-to-far-infrared narrowband light source for MEMS, comprising a substrate, a suspension support layer, a heating resistor layer, and a radiation functional layer. The substrate is a silicon substrate. The suspension support layer is fixed to the substrate by anchor points. The heating resistor layer is disposed on the suspension support layer, and the radiation functional layer is disposed above the heating resistor layer. The suspension support layer and the heating resistor layer have Y-shaped grooves forming a Y-beam suspension structure. The Y-beam suspension structure is connected to the substrate by anchor points to form thermal isolation. The surface of the radiation functional layer has a periodically arranged array of micro / nano structures. The period and size of the micro / nano structure array are on the same order of magnitude as the target infrared wavelength, forming an artificial interface with specific equivalent refractive index and resonance characteristics to achieve narrowband spectral output. This invention can reduce heat conduction from the radiation region to the substrate, reduce heat conduction loss, reduce heat leakage, improve thermal isolation performance, and reduce heat capacity, thereby enabling the beam to heat up and cool down rapidly.

The application provides an ultra-low temperature vacuum infrared radiometer based on a shutter modulation principle, comprising a modulation component, an optical-mechanical structure, an infrared detector and an electronic component; the modulation component is arranged between a device to be measured and the optical-mechanical structure, and comprises a shutter modulator and a shutter baffle; the shutter modulator controls the shutter baffle to move at a fixed frequency and intermittently shields the radiation energy transmission of the device to be measured; the optical-mechanical structure is used for converging the radiation energy; and the infrared detector and the electronic component are used for quantitatively collecting and processing the radiation energy. The modulation component is arranged outside the optical-mechanical structure of the radiometer to replace a chopper, so that the thermal influence of the modulation system on the system is reduced.