12 results about "Absorptance" patented technology

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.

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.

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.

The application discloses a kind of super material broadband solar absorber, belong to super material optical device technical field.The absorber adopts whole refractory material system, only by chromium (Cr) and silicon dioxide (SiO2) is formed, overall is periodic inverted hollow right square prism structure, system is divided into upper and lower two parts: the upper half is the periodic cyclic structure of SiO2 and Cr composition;Lower half is SiO2 dielectric layer and Cr reflection layer;From top to bottom, it presents the periodic hollow inverted right square prism structure.The application realizes 97.26% average absorption rate in 250-2500nm wavelength range, energy absorption rate is as high as 97.96% under AM1.5 standard solar irradiation condition, while the absorber has excellent polarization insensitive characteristics, simple structure, excellent thermal stability, can be widely used in solar energy collection, optical stealth and other fields.

An imaging system, includes: a laser light source having a wavelength from 380 nm to 490 nm; and a beam guidance element, the laser light source configured for generating an average surface power density of more than 10 W / cm2, the beam guidance element including a glass which has a quality factor F(436 nm)=S(436 nm)*(Abs0(436 nm)+Abs1(436 nm)) / k, wherein S(436 nm) is a thermality at a wavelength of 436 nm, Abs1(436 nm) is an additional absorbance in comparison to Abs0(436 nm) at a wavelength of 436 nm after an irradiation with a power density of 345 W / cm2 for 72 hours with a laser light having a wavelength of 455 nm, Abs0(436 nm) is an absorbance at a wavelength of 436 nm of a sample having a thickness of 100 mm without the irradiation, k is the thermal conductivity, and the quality factor F(436 nm) is <15 ppm / W.

The application relates to a rice grain radiation transmission model construction method, device, equipment and medium, the method comprising: based on a preset light ray tracing algorithm, initializing the geometric size parameters of a rice grain physical model and the optical parameters of incident light rays, uniformly sampling incident points on the surface of the rice grain physical model, iteratively tracing the propagation path of internal light rays of the rice grain physical model in sections, and calculating the energy attenuation value of each propagation path of the internal light rays; based on the energy attenuation value, determining the residual energy after energy attenuation of each propagation path, when the exit stage of the internal light rays of the rice grain physical model does not occur total reflection, distributing the transmission energy according to the exit direction of the internal light rays, accumulating the reflection energy and the transmission energy corresponding to all incident light rays, combining the energy conservation law to calculate the absorption energy of the light rays and correct the numerical error, and outputting the overall reflectivity, transmissivity and absorptivity of the rice grain physical model. The application realizes accurate spectral simulation of rice grains.

This invention discloses a broadband high-absorption solar absorber based on a hollow cross-ring structure. The absorber is composed of a periodic array of hollow cross-ring structural units. Each unit, from top to bottom, includes a metallic iron (Fe) resonator layer, a silicon dioxide (SiO₂) dielectric layer, a gallium arsenide (GaAs) layer, and a metallic Fe reflective layer. The metallic iron resonator employs a hollow cross-ring structure design. Through optimized structural design, material selection, and key parameter matching, this invention achieves highly efficient light energy capture over a wide spectral range: an average absorptivity of 98.47% in the 498-1988 nm wavelength range, a continuous bandwidth exceeding 90% at 1490 nm, and a weighted absorption efficiency of 97.96% under the AM1.5 standard solar spectrum, with an energy loss rate of only 2.04%. The excellent absorption performance of this absorber stems from the surface plasmon resonance, gap plasmon resonance, and synergistic coupling effect between the unit structures excited by the hollow cross-ring structure. Meanwhile, the overall structure is only 243 nanometers thick, exhibiting ultra-thin characteristics, high stability, and good fabrication tolerance. This invention can be widely applied in fields of high-efficiency solar energy utilization such as photovoltaic power generation and photothermal conversion, providing new ideas for the development of next-generation high-efficiency solar energy devices and possessing significant engineering application value.

The present application relates to a kind of high-entropy two-dimensional transition metal MXene wide-band light-absorbing material, the material is made of M layer element, A layer element and graphite powder, and two-dimensional layered structure is formed by etching A layer Al element with 40% mass concentration LiF-HCl mixed solution, and its chemical general formula is M3C2;Wherein: M layer element is any five kinds of metal elements in Ti, Zr, Nb, Mo, Hf and W, and metal atom is equimolar ratio;A layer element is Al.Meanwhile, the present application also provides the preparation method of the material.The preparation method of the present application is easy, strong repeatability, high production efficiency, can be used for industrial mass production, and the prepared wide-band light-absorbing material has solar energy absorption rate of 0.891~0.910 in 0.3~2.5 μm wave band range, and can be widely applied to solar light-heat conversion material.

This invention discloses a space-simulated environment variable-temperature photothermal performance testing device based on steady-state calorimetry: the outer layer of the experimental chamber is a vacuum chamber, and the inner layer is a cryogenic chamber, with gas communication between the vacuum chamber and the cryogenic chamber; before testing, the cryogenic chamber is cooled by a cooling device, and the interior of the experimental chamber is evacuated to a vacuum state by a suction device, so that the interior of the experimental chamber meets the testing environment. A sample installation and adjustment unit is used to install and fix the sample to be tested in the cryogenic chamber. A temperature control unit is used to change the temperature of the sample to be tested. A solar radiation simulation unit is used to simulate sunlight irradiation. When the sample to be tested reaches the preset temperature, the data processing unit records the corresponding vacuum level and the output power of the temperature control unit, and calculates the emissivity of the sample to be tested by combining parameters such as the temperature inside the cryogenic chamber and the radiative area of ​​the sample. This invention achieves continuous and simultaneous measurement of full-spectrum hemispherical infrared emissivity and solar absorptivity from 150K to 450K, with a large temperature range and high measurement accuracy.

A controllable flower-like BSO photocatalyst with nanosheet stacking and its preparation method are disclosed. The method involves improving and controlling the growth of bismuth silicate by introducing CTAB and CTAC to construct a heterogeneous photocatalyst with controllable band gap and morphology. The addition of CTAC reduces the particle size of the sheet-like powder and decreases its packing density, while the addition of CTAB promotes the formation of a flower-like structure. Combined with the synergistic effect of the two dispersants, BSO is modified to control the formation of the heterogeneous structure, resulting in a controllable flower-like structure with thin sheet stacking. This effectively increases the surface area and significantly improves the absorption rate of visible light radiation. The method is simple to operate, and the prepared powder has a uniform particle size distribution and good dispersibility. The resulting composite material not only incorporates the effects of the new heterostructure, but the smaller and thinner sheet-like structure also provides more active sites, exhibiting higher photocatalytic performance. This photocatalyst also has broad applicability to antibiotics and is recyclable.

This invention relates to a zirconate ceramic with electromagnetic wave modulation properties. The zirconate ceramic has the general chemical formula A₂Zr₂O₇, where the A-site is composed of three or four metallic elements, including La, selected from La, Pr, Co, Cu, Fe, Ni, and Cr; and the molar percentage of each element at the A-site is between 20% and 50%. The zirconate ceramic has a single pyrochlore structure with space group Fd⁻³m; its average light absorptivity in the 0.3–2.5 μm wavelength range is greater than 0.92, and its average infrared emissivity in the 0.78–25 μm wavelength range is greater than 0.90. This invention also discloses a method for preparing this zirconate ceramic. By introducing transition metal elements at the A-site, this invention provides the possibility of optimizing electromagnetic wave modulation performance. The obtained zirconate ceramic has crucial application value in fields such as solar thermal utilization, aerospace thermal protection, industrial high-temperature energy saving, infrared stealth, and radiative cooling.