107 results about "Absorptance" patented technology

The invention provides an intelligent control method for a floodlight illumination system, and the method comprises the steps: obtaining an environment surface roughness coefficient, spectral reflection distribution and spatial geometric change data, determining the wall surface material absorptivity and shielding region coordinates, and obtaining environment reflection characteristics and shielding distribution data; analyzing shielding boundary sharpness and shielding angle distribution according to the spatial geometric change and the coordinates of the shielding area, calculating a luminous flux distribution curve of a local dark area, and judging whether the influence range of the dark area exceeds a preset threshold range or not; calculating the illumination coverage integrity according to the updated light field distribution and polarization reflection characteristics, determining the boundary sharpness of a light beam, and obtaining a light field uniformity parameter; and according to the light field uniformity parameter and the shielding thermal radiation effect, calculating and optimizing light field parameters.

This disclosure relates generally to a patterning structure including an underlayer and an imaging layer, as well as methods and apparatuses thereof. In particular embodiments, the underlayer provides an increase in radiation absorptivity and / or patterning performance of the imaging layer.

The invention relates to the technical field of thermal control of spacecrafts, and particularly provides a high-thermal-stability temperature control structure of a space camera main system, which comprises a first thermal insulation layer, a second thermal insulation layer, a third thermal insulation layer and a truss, and is characterized in that the first thermal insulation layer covers the inner wall of the space camera main system and has high solar spectrum absorptivity and high infrared spectrum emissivity; the second heat insulation layer wraps the outer wall of the space camera main system and has low solar spectrum absorptivity and low infrared spectrum emissivity; a truss is further installed on the outer side of the space camera main system in the circumferential direction, a third heat insulation layer is arranged on the truss, and the third heat insulation layer has the low solar spectrum absorption rate and the high infrared spectrum emissivity. The multi-stage thermal insulation structure is utilized to improve the inhibition capability of the camera main system temperature control structure on the influence of the external thermal environment, and the influence of external heat flow change on the temperature stability of the camera main system is effectively reduced.

The invention discloses an ultra-wideband high-efficiency absorber in the technical fields of optics, material science and energy, which takes silicon dioxide (SiO2) as a substrate, and a titanium (Ti) nano rectangular body array is arranged above the substrate; a silicon nitride (Si3N4) regular hexagonal prism array is constructed on the top of the titanium layer, six cylindrical holes are etched in the midpoint of each vertex of a regular hexagon on the bottom surface of the titanium layer, and magnesium fluoride (MgF2) is filled in the cylindrical holes to form magnesium fluoride nano cylinders; a chromium (Cr) ring and a silicon nitride ring are sequentially superposed at the top end of the hexagonal prism and are tangentially matched with the hexagon on the top surface of the hexagonal prism. According to the UWB-HEA, the incident wavelength ranges from 400 nm to 4000 nm, the designed efficient absorption range (namely absorption band) of the UWB-HEA covers from near-infrared 855 nm to mid-infrared 3540 nm, about 2685 nm, the average absorption rate of 96.67% is achieved under TM waves, and the highest absorption rate is 99.66%; the average absorption rate of 96.44% is achieved under TE waves, the highest absorption rate is 99.72%, and the absorption rate is almost unrelated to polarization. In order to reduce radiation energy loss of an object, an ideal solar heat absorber needs to realize efficient light absorption in a wide wave band range.

The invention relates to conductive paste and a preparation method thereof, a solar cell and a preparation method thereof, and a photovoltaic module. The conductive paste comprises 82%-88% of metal powder, 1%-5% of glass powder, 8%-15% of an organic carrier, 0.5%-3% of a wave-absorbing material and 0.1%-1% of a polymer pore-forming agent, and the wave-absorbing material can absorb laser and release heat. During laser-assisted sintering treatment, the wave-absorbing material can efficiently absorb laser energy and instantly release heat, so that the surrounding polymer pore-forming agent is quickly gasified. After the polymer pore-forming agent is gasified, a cavity structure is formed in the conductive slurry, a multi-reflection cavity of light is formed, laser which is subsequently transmitted in is reflected for multiple times in the cavity, a light path is prolonged, and the absorption rate of laser energy is greatly improved. Due to the high absorptivity of the laser, the laser power required by good ohmic contact is formed, the energy consumption is reduced, and the damage to the surface of the battery is reduced.

The application belongs to the field of turbine blade thermal barrier coating of an aero-engine. Specifically, it is a structure design, a preparation method and a prepared coating of a double-layer radiation-resistant thermal barrier coating with a high-reflection layer and a high-absorption layer. The coating comprises a high-absorption layer and a high-reflection layer. The high-absorption layer can absorb part of the energy of photon radiation and re-emit it into the environment, while relying on a cooling gas film to quickly remove heat. Part of the energy of the photon radiation is reflected by the high-reflection layer again to the high-absorption layer after passing through the high-absorption layer, and the process of absorption-emission-cooling gas film heat dissipation is repeated. Within a set temperature range, the absorption rate of the high-absorption layer is determined based on the temperature difference requirement between the inner and outer surfaces of the thermal barrier coating, and the high-absorption layer material is determined based on the absorption rate. The application greatly reduces the radiation heat flow penetrating the coating, avoids the direct heating of the high-temperature alloy by infrared radiation, and significantly improves the heat insulation capacity of the thermal barrier coating and the service life of the turbine blade.

Provided is a phosphor powder in which the balance of suitability, brightness, and excitation light blocking properties of a complex obtained from the phosphor powder with respect to a small-sized light-emitting device is improved. A phosphor powder containing SCASN phosphor particles, the phosphor powder having a volume-based median diameter (D50) of 0.1 [mu] m to 5.0 [mu] m (inclusive) as determined by a laser diffraction scattering method, and a peak wavelength of a fluorescence spectrum measured by a spectrophotometer when the phosphor powder is irradiated with light having a wavelength of 455 nm of 590.0 nm to 630.0 nm (inclusive), the absorption rate when the phosphor powder is irradiated with light having a wavelength of 455 nm is 80.0% or more.

The application provides an antifouling coating material, an antifouling coating and a preparation method and application thereof. The antifouling coating prepared from the antifouling coating material provided by the application has a water contact angle of 105.8-161.5 degrees and a sliding angle of 1.5-24.1 degrees in a wavelength range of 200-2500 nm; a light absorption rate of 65.7-98.3 %; and a maximum light-heat surface temperature of 45.1-82.8 DEG C under 1 solar light intensity. Moreover, the antifouling coating has synergistic antifouling of superhydrophobic low adhesion and biological repellence, wide-spectrum high-efficiency and controllable light-heat antifouling capacity, all-weather antifouling capacity facing the air-water interface of the sea, and excellent mechanical durability and light-heat / wetting performance stability.

To provide an exterior laminate that can be used as an exterior component and is capable of sufficiently suppressing heat accumulation due to radiant heat such as sunlight. [Solution] An exterior laminate 10 is disclosed, having, in order from the surface side, a) a transparent film layer 1 containing an acrylic resin, c) a printed layer 2, and b) a colored film layer 3 containing a polyvinyl chloride resin, wherein the printed layer 2 of c) does not contain carbon black, the solar transmittance of the printed layer 2 of c) is 70% or more, and the solar absorptance is 20% or less. Preferably, the printed layer 2 of c) contains a perylene-based colorant and / or a phthalocyanine-based colorant.

The invention discloses a Ni3Al-PPy composite wave-absorbing material as well as a preparation method and application thereof, and belongs to the technical field of electromagnetic wave-absorbing materials. The Ni3Al-PPy composite wave-absorbing material with a core-shell structure is successfully synthesized by combining a thermit reaction with a chemical oxidation polymerization method and hydrochloric acid modification. By regulating and controlling the addition amount of the pyrrole monomer in the range of 0.25-0.75 mL, the continuous regulation and control of the thickness of the PPy shell layer from 0.22 [mu] m to 0.31 [mu] m is realized. When the thickness of a PPy shell layer is 0.27 mu m and the matching thickness of the composite wave-absorbing material is 3.0 mm, the minimum reflection loss and absorptivity gt of-40.0 dB are obtained at 9.27 GHz; and when the matching thickness is 2.0 mm, the effective absorption bandwidth reaches 3.02 GHz. According to the invention, the effect of the shell layer thickness in regulating and controlling the performance of the wave-absorbing material with the core-shell structure is illustrated, and a feasible strategy is provided for designing a high-performance light-weight wave-absorbing material with adjustable electromagnetic parameters and enhanced durability.

The present invention relates to the technical field of cement preparation, and in particular to a cement raw material with high sunlight absorptivity, a preparation method and an application thereof. The invention relates to a method of preparing a cement raw material with high sunlight absorptivity, wherein Ca(OH)2 is mixed with original cement raw material, added to a mixed solution of copper nitrate and manganese nitrate to react and generate a precipitate, and the precipitate is evenly distributed on the surface of the original cement raw material. The cement raw material with high sunlight absorptivity can be prepared, and when cement clinker is produced using solar energy, the absorption of sunlight by the cement raw material can be greatly improved, thereby improving calcination efficiency and reducing energy consumption in cement production.

The invention relates to a spectrum selective absorbing coating driven by anion and cation co-entropy engineering. The coating is composed of a polished stainless steel heat absorber substrate, a (HfZrTiTaMo) B absorbing layer and a Si3N4 antireflection layer. And the absorption layer is obtained by sputtering high-entropy boride targets with equal molar ratios under different parameters through radio frequency reaction magnetron sputtering. The preparation process is simple, the cost is low, the absorption rate of the prepared coating is larger than or equal to 0.91, the emissivity is smaller than or equal to 0.13 under the condition of the atmospheric quality factor AM1.5, and the coating has the good spectrum selection characteristic and has the important application value in the fields of solar photo-thermal power generation, photo-thermal sterilization, seawater desalination, water evaporation and deicing.

This invention discloses a calculation method for an optical model of a parallel slat transparent heat-insulating window, including: determining environmental parameters such as the sun's position; determining the solar radiation value and the incident angle of direct radiation; determining the maximum number of reflections and the incident light segmentation ratio; calculating the transmittance of direct-to-direct radiation from the slats; calculating the transmittance and reflectance of direct-to-scattered radiation from the slats; calculating the transmittance and reflectance of scattered-to-scattered radiation from the slats; determining the transmittance, reflectance, and absorptivity of back radiation transmission; calculating the transmittance and reflectance of direct radiation, and the transmittance and reflectance of scattered radiation from the single-pane glass; calculating the solar radiation transmission through the parallel slat transparent heat-insulating window using the net radiation method; and further fitting a simplified formula for calculating solar transmittance. This invention enables designers to perform optical calculations on parallel slat transparent heat-insulating windows and reasonably evaluate their performance and energy-saving potential.

The present invention belongs to the field of surface engineering technology, and specifically relates to an oxide-based gradient multi-phase nanocomposite coating and a preparation method thereof. The composite coating includes a Cr-Al-Si layer, a Cr-Al-Si-N layer, and an xAl2O3-yCr2O3-zSiO2-kY2O3-iEr2O3 layer arranged in sequence. The xAl2O3-yCr2O3-zSiO2-kY2O3-iEr2O3 layer is a nano multi-phase composite layer composed of Al2O3, Cr2O3, SiO2, Y2O3, and Er2O3 phases, and the molar ratio between each phase is x:y:z:k:i, where 0 < x, y, z, k, i < 0.4, and x + y + z + k + i = 1. This coating is obtained by using pulsed multi-arc ion plating and radio frequency magnetron sputtering for the corresponding coatings respectively in a vacuum environment. The coating of the present invention has the characteristics of high bonding strength, high hardness, high hydrogen resistance factor, high solar absorptance, and low solar emittance, with excellent performance, and can greatly improve the problem of performance deterioration of the base material caused by hydrogen permeation.

A method of manufacturing a lens includes: injecting a thermosetting first resin in a first mold, and curing the thermosetting first resin, to form a cover blank having cover parts; removing a part or all parts of the first mold; arranging the cover blank in a second mold; injecting a thermosetting second resin having a greater light absorptance or a greater light reflectance than the thermosetting first resin into the second mold and curing the thermosetting second resin, to form a lens blank having a light-shielding part between adjacent ones of the cover parts; taking out the lens blank from the second mold; cutting the lens blank at the light-shielding part located between the adjacent ones of the cover parts to obtain individual lenses having lateral side walls and flange parts extending outward from lower-end portions of the lateral side walls, which are both covered by the light-shielding part.

The invention discloses an electronic transformer insulation aging monitoring method and system, relates to the technical field of power equipment monitoring, and is used for effectively identifying and early warning insulation aging caused by atypical chemical products generated by an electronic transformer under high-frequency stress so as to improve the operation stability of the electronic transformer. The method comprises the steps that real-time light intensity data sent by a photoelectric sensor is received, the real-time light intensity data is an electric signal obtained by conducting photoelectric conversion on an optical signal obtained after the photoelectric sensor penetrates through insulating oil, and the optical signal is a signal emitted by an optical detection device to a channel through which the insulating oil flows; the optical signal has characteristic absorption on atypical chemical products in the insulating oil; calculating the real-time light absorptivity of the insulating oil based on the real-time light intensity data; and when the real-time light absorptivity meets a preset condition, generating an insulation aging early warning signal.

The application discloses a heat control device and method for a flexible thin film antenna in space, which is mainly used for providing heat control for large flexible antennas such as phased array radars in space. A solar shield with high infrared emissivity, low solar absorptivity and microwave permeability is arranged on the front surface of the antenna, and when the back surface of the antenna is irradiated by the sun, the solar shield can quickly dissipate heat by using the high infrared emissivity, and when the front surface of the antenna is irradiated by the sun, the solar shield can prevent the antenna from absorbing too much heat and making the temperature of the antenna too high by using the low solar absorptivity; an insulating layer and a low solar absorptivity coating are arranged on the back surface of the antenna, and when the back surface is irradiated by the sun, the low solar absorptivity coating can reflect most of the solar heat, and when the back surface is in a shadow area, the insulating layer can prevent the temperature of the antenna from being too low. Therefore, the antenna can always be in a relatively suitable temperature range in the complex and changeable space orbit thermal environment. The application has the characteristics of strong adaptability and wide applicability.

The application discloses a kind of perfect cutoff absorber of metasurface based on nano round structure, adopt nanometer cylinder and ring array grown on silicon dioxide, two groups of ring structure are respectively selected using dielectric material gallium arsenide and silicon.Optimizing structure parameter, wavelength from ultraviolet to mid-infrared, 0.913 average absorption is realized in absorption band 100-710nm, and average absorption is only 0.02 in non-absorption band 1260nm-20μm wave band.ER is 9.6dB, ED is 0.81, and CS is 0.0015nm ‑1 The perfect cutoff absorber provided by the application has exactly this spectral selectivity, which provides an effective method for designing ideal solar heat absorber, which has important application in the field of renewable energy, such as solar thermal photovoltaic and solar thermal energy application.

The present invention relates to a solar absorber based on a gold nanoarray, which belongs to the field of micro-nano optoelectronic technology. The solar absorber is composed of gold nanounits periodically arranged in an XOY plane. Sunlight is incident in the form of a plane wave. Each of the gold nanounits comprises, from bottom to top, a base layer, a distributed Bragg reflector layer, a two-dimensional material layer, and an antenna layer. The distributed Bragg reflector layer includes five layers of distributed Bragg reflectors (DBRs). The projections of the base layer, distributed Bragg reflector layer, and two-dimensional material layer on the XOY plane overlap and form a square. The projection of the antenna layer on the XOY plane is a circle, and the square and circle are concentric. The solar absorber has a simple structure, an average absorptivity of 80% in the visible light range of 400nm-700nm, is unaffected by the polarization of the light source, and exhibits good absorption effect within the incident angle range of 0° to 60°.

The application discloses a multilayer film compatible with H, K, medium-wave infrared and long-wave infrared wave band stealth and radiation heat dissipation. The multilayer film comprises a substrate, a metal reflection layer, a photonic crystal layer fusing loss medium and an H and K wave band anti-reflection layer, the absorptivity of the H and K wave band is greater than 0.5, the emissivity of the medium-wave infrared and long-wave infrared wave band is lower than 0.5, and the emissivity of the very long-wave infrared wave band is greater than 0.5; the photonic crystal layer fusing loss medium is a multilayer structure and is formed by alternately stacking medium layers of multiple high and low refractive index medium materials. The multilayer film can realize the stealth of solar radiation and thermal radiation and has effective radiation heat dissipation heat management capability at the same time, and can be widely applied to the fields of aviation, spaceflight and the like.

The invention relates to a near-blackbody high-entropy inverse spinel oxide material, the general formula of the material is (A1xA2yA3zA4uA5v) 3O4, A1, A2, A3, A4 and A5 are any five elements of Fe, Ni, Co, Cr, Mn, Cu and Ti, x, y, z, u and v are equal or approximately equal, and x + y + z + u + v = 1; the structure of the material belongs to a cubic system and has an inverted spinel crystal structure, and the space group of the material is Fd-3m. Meanwhile, the invention also discloses a preparation method of the material. The method is simple to operate and short in production cycle, the obtained high-entropy inverse spinel oxide material has high solar absorptivity and infrared emissivity, the radiation curve of the high-entropy inverse spinel oxide material is close to an ideal black body radiation curve, and the high-entropy inverse spinel oxide material can be widely applied to the fields of radiation heating, human body heat management, aerospace heat dissipation, photovoltaic device cooling and the like.

The invention relates to a high-entropy two-dimensional transition metal MXene broadband light-absorbing material which is composed of an M-layer element, an A-layer element and graphite powder, an A-layer Al element is etched through a LiF-HCl mixed solution with the mass concentration of 40% to form a two-dimensional layered structure, and the chemical general formula of the material is M3C2; wherein the elements of the M layer are any five metal elements of Ti, Zr, Nb, Mo, Hf and W, and the metal atoms are in an equal molar ratio; and the element of the A layer is Al. Meanwhile, the invention also provides a preparation method of the material. The preparation method is easy, high in repeatability and high in production efficiency and can be used for industrial large-scale production, the solar energy absorption rate of the prepared broadband light absorption material within the waveband range of 0.3-2.5 microns is 0.891-0.910, and the broadband light absorption material can be widely applied to solar photo-thermal conversion materials.

The utility model relates to the technical field of sunglass polaroid testing, in particular to a sunglass polaroid ultraviolet absorptivity testing device which comprises a base, an ultraviolet intensity detection sensor is fixedly connected to the top of the base, and electric push rods are fixedly connected to the two sides of the top of the base. Clamping frames are fixedly connected to the output ends of the opposite sides of the two electric push rods, a control mechanism is fixedly connected to the rear side of the top of the base, and a control frame is fixedly connected to the top of the control mechanism. The control mechanism is matched with the control frame to push the adjusting rod, the fixing frame is controlled by the adjusting rod and the mounting plate to move, the fixing frame is matched with the rollers to enable the integrated light source translation mechanism to slide on the surface of the arc-shaped track, and the integrated light source translation mechanism is adjusted to different use angles. The method and the device are used for simulating irradiation of the polaroid at different angles in a real scene and improving the accuracy of test data of the sunglasses polaroid.

This invention relates to the field of window spectral characteristic calculation, specifically to a method, system, and storage medium for calculating the spectral characteristic curve of an energy-saving window. The calculation method involves iterating through the transmittance, reflectance, and absorptance of a reference glass at wavelength λ, calculating the total annual energy consumption of air conditioning and lighting caused by windows facing the corresponding direction in the building, and obtaining the transmittance at the lowest total energy consumption at wavelength λ. 、 Reflectance and absorptivity are determined as the optimal spectral characteristic parameters of the glass at wavelength λ. After traversing the radiation band range, the optimal spectral characteristic parameters for different wavelengths are fitted into a band-based continuous curve, yielding the optimal spectral characteristic curve for the corresponding window orientation of the building in the local area. This not only provides quantitative basis for architects to scientifically select window glass, but also enables refined product development for different regions and building orientations, minimizing building energy consumption while ensuring indoor light and heat comfort.

Thermal control coatings are shown and described herein. The thermal control coating is provided from a two component addition cure silicone composition. The composition includes a curable siloxane and titanium dioxide. The compositions are fast curing compositions that exhibit low solar absorptivity, high solar reflectance, and / or high infrared emissivity when cured. In addition, the composition exhibits good flexibility when cured, and can be applied to a surface without the aid of a primer.

To provide a phosphor powder having enhanced balance of properties among applicability of the resulting composite for a compact light-emitting device, luminous intensity, and ability to block excitation light.SOLUTION: A phosphor powder comprises SCASN phosphor particles, the phosphor powder having a volume-based median diameter D50 of 0.1 μm or more and 5.0 μm or less as measured by a laser diffraction scattering method, the phosphor powder exhibiting a fluorescence spectrum peak wavelength of 590.0 nm or more and 630.0 nm or less as measured by a spectrophotometer when irradiated with light having a wavelength of 455 nm, and the phosphor powder having an absorption rate of 80.0% or more when irradiated with light having a wavelength of 455 nm.SELECTED DRAWING: None

The invention provides an infrared absorption substance, a preparation method thereof and ink. The preparation method of the infrared absorption substance comprises the following steps: preparing a first solution, a second solution and a third solution, mixing the first solution, the second solution and the third solution to obtain a mixed solution, and standing the mixed solution according to a preset standing duration; the first solution contains copper phosphate, the second solution contains sodium tungstate dihydrate, and the third solution contains cesium carbonate and citric acid; synthesizing the mixed solution by using a hydrothermal synthesis method to obtain a solid-liquid mixture; and carrying out water washing, alcohol washing, centrifugal separation and drying on the solid-liquid mixture to generate an infrared absorption substance, so that the infrared absorption substance has an infrared absorption rate of 85% or above at the infrared band of 850-1250 nm.

The invention relates to a sunscreen fiber, a preparation method thereof and a radiation refrigeration fabric. The sunscreen fiber comprises a core layer and a skin layer coating the surface of the core layer, wherein the core layer comprises a carbon-based nano material, the skin layer comprises radiation refrigeration particles, the absorptivity of the carbon-based nano material to sunlight at the wave band of 0.3-2.5 microns is a, the mass fraction of the carbon-based nano material in the core layer is m1, the atmospheric window emissivity of the radiation refrigeration particles at the wave band of 8-13 microns is b, and the sunlight reflectivity of the radiation refrigeration particles at the wave band of 0.3-2.5 microns is c, the mass fraction of the radiation refrigeration particles in the skin layer is m2, and a, b, c, m1 and m2 meet the following condition that c is larger than or equal to 88%. The sunscreen fiber has excellent sunlight total spectrum reflection performance and shading performance, and the radiation refrigeration fabric prepared from the sunscreen fiber as a raw material has extremely low sunlight transmittance, so that a better radiation refrigeration effect can be achieved.

The invention discloses a heat absorber enhanced heat transfer design method based on the effective absorptivity of solar flow, and belongs to the technical field of tower type photo-thermal power stations. Aiming at the problems of large surface temperature gradient, large heat loss and relatively low light-heat conversion efficiency of a chloride heat absorber, the method comprises the following steps of: constructing an optical model by adopting a Monte Carlo ray tracing method through a grid discrete heat absorber to obtain annual average solar flow distribution, and establishing a flow and heat transfer model to calculate annual average values of efficiency, temperature and heat loss; and solving the annual average solar energy flow effective absorptivity alpha (i, j) of each grid, taking a truncation index beta = alphamax-5% as a criterion, only arranging a spiral twisted strip in a high-absorption area in which alpha (i, j) is greater than beta, and determining the arrangement length of the twisted strip through performance calculation and iterative optimization. Fine design of the spiral twisted belt in the chlorate heat absorber is achieved, heat loss is reduced while balance among efficiency, flow heat transfer performance and flow resistance is achieved, light-heat conversion efficiency is effectively improved, and the spiral twisted belt is suitable for optimization of the chlorate heat absorber of the tower type photo-thermal power station.

The application provides a kind of glass that changes color and absorbs heat prepared by using iron-containing dust sludge of Baotou Steel, and the glass composition includes the following components by weight percentage: SiO2: 60-80%; iron-containing dust sludge: 10-20%; SnO2: 0.8-5%; Si: 0.1-5%; Na2CO3: 1-15%; CeCO3: 0.5-1%; H3BO3: 2-10%; NaCl: 1.5-5%; MgCO3: 2-6%; ZnO: 3-5%; LaCO3: 5-10%; AgNO3: 0.5-5%; KCl: 2.5-8%. The glass described in the application has an ultraviolet and infrared absorption rate of more than 90% before changing color, and a visible light transmittance of more than 70.0%.