464results about How to "Improve reflectivity" patented technology

The invention discloses a preparation method of low-radiation coated toughened glass, which comprises the following steps: sintering a target material, carrying out moisture removal and degassing pretreatment on glass, carrying out coating treatment and toughening treatment, and laminating a composite metal film layer on a toughened glass substrate to prepare the toughened coated glass with three metal silver film layers. According to the method disclosed by the invention, after a common glass substrate is plated with the composite metal film layers, toughening treatment is carried out, and after the toughening treatment, all the metal film layers reflect, interfere and refract light, so that the glass disclosed by the invention is light green (French green) in the sun, and the decoration and energy-saving effects are good; the visible light transmittance is high, the outdoor visible light reflectivity is low, the solar energy transmittance is low, and the solar energy reflectivity is high; the prepared hollow glass has better energy-saving effects such as light control, heat insulation and heat preservation, enables buildings to be closer to the nature, is used for near-zero energy consumption buildings, and enables the buildings to meet the requirements of the national standard General Standard for Building Energy conservation and Renewable Energy Utilization.

The invention relates to the technical field of solar cell preparation, and discloses a laser patterned polycrystalline silicon passivation cell, a preparation method and a photovoltaic module. The preparation method comprises the following steps: preparing a passivation contact structure and an oxidation film on the surface of a silicon substrate; laser patterning processing is carried out on the surface of the silicon substrate, the passivation contact structure and the non-metallization area of the oxidation film, so that the processed non-metallization area is not subjected to alkali etching resistance, and doping atoms are pushed into the silicon substrate through laser diffusion to form a doping area; performing alkali wash etching to form an alkali wash etching region etched into the silicon substrate, and leaving a doped region on the silicon substrate exposed in the alkali wash etching region; respectively depositing a passivation antireflection film and an antireflection film on the front surface and the back surface of the silicon substrate; and preparing the metal electrode. According to the preparation method, parasitic absorption loss can be avoided, the transverse transmission capability of internal carriers can be enhanced, the light utilization rate and the photoelectric conversion efficiency of the cell are further improved, the process window is larger, and the process steps are simple.

The invention discloses a radiation refrigeration coating and a preparation method thereof. The radiation refrigeration coating comprises a first filler and a second filler, the mass ratio of the first filler to the second filler is (1-3): (1-5), and the first filler comprises the following components in percentage by weight: 50-70% of a polyurethane emulsion, 10-15% of a silane coupling agent, 8-10% of multi-mesoporous nano-silica and 5-8% of talcum powder; the second filler comprises the following components in percentage by weight: 60%-70% of polyethylene glycol, 10%-15% of a dispersing agent and 5%-8% of nano barium oxide; 5%-8% of tannic acid; 3%-5% of nano silver; the viscosity of the polyurethane emulsion ranges from 300 cps to 800 cps. The radiation refrigeration coating disclosed by the invention has the advantages that a refrigeration film has larger infrared radiation refrigeration capacity in an atmospheric window, better ultraviolet light absorption capacity and long service life.

The invention provides silicone rubber and a preparation method thereof. The invention provides silicon rubber. The silicon rubber is prepared from the following raw materials: vinyl-terminated polydimethylsiloxane, vinyl MQ silicon resin, an adhesion promoter, titanium dioxide, polymethylhydrosiloxane and a reaction inhibitor. The preparation method of the silicone rubber comprises the following steps: in the presence of a catalyst, mixing a mixture of vinyl-terminated polydimethylsiloxane and vinyl MQ silicon resin, an adhesion promoter, titanium dioxide, polymethylhydrosiloxane and a reaction inhibitor to obtain the silicone rubber. The silicone rubber disclosed by the invention has high reflectivity, low thixotropy, high fluidity, high heat resistance and storage stability, and is relatively simple in production process and suitable for industrial production.

The invention relates to an ultra-high-purity silver target material and a preparation method thereof, and belongs to the field of target materials, and the ultra-high-purity silver target material comprises the following raw materials in percentage by weight: 99.99% of high-purity silver, 0.05%-0.15% of palladium, 0.025%-0.075% of iridium, 0.1%-0.3% of neodymium and 0.1%-0.3% of praseodymium. According to the ultra-high-purity silver target material and the preparation method thereof, 5N-grade high-purity silver is adopted as a base material, trace palladium, iridium, neodymium, praseodymium and other elements are accurately added, the purity of the target material is remarkably improved and exceeds the purity range in the prior art, the hardness, strength and abrasion resistance of the target material are optimized through the innovative material design, and the service life of the target material is prolonged. The compact uniformity of the material is effectively improved and the internal stress is eliminated through grain refinement and multi-stage heat treatment, in addition, the isotropy of the target material is enhanced through the multi-directional forging process, the consistency of the performance in different directions is ensured, the mechanical performance of the target material is remarkably improved through the improvements, the target material can better adapt to the application environment with the high wear resistance requirement, and the service life of the target material is prolonged. And meanwhile, the conductivity, the reflectivity and the uniformity of a thin film prepared by using the target material are improved.

The detection device comprises a detection shell, a light source module, a detection probe and a circuit board, an optical gas chamber is arranged in the detection shell; the detection shell comprises a first reflecting surface, the first reflecting surface is located on the periphery of the optical gas chamber, and a reflecting layer is at least partially attached to the first reflecting surface; the detection shell is provided with a plurality of first vent holes, the first vent holes are in gas communication with the outside of the detection device, and the first vent holes are in gas communication with the optical gas chamber; at least part of the light source module is located in the detection shell, the light source module is electrically connected with the circuit board, and the light source module is close to the first reflecting surface relative to the detection probe; the detection probe is at least partially located in the detection shell, and the detection probe is electrically connected with the circuit board. In the detection device, at least part of the first reflecting surface is attached with the reflecting layer, so that the reflectivity of light is increased, light loss caused by diffuse reflection of light in the detection shell is reduced, and the measurement accuracy of the detection device is improved.

The invention provides antireflection eye protection functional paper and a preparation method thereof. According to the preparation method, the coating with specific content components is adopted and matched with specific process steps, overall good interaction is achieved, compared with coated base paper, the diffuse reflection rates of the prepared anti-reflection eye-protecting functional paper are reduced by 10.07% at 315 nm and 6.77% at 400 nm respectively in a harmful blue-violet light area (400-480 nm) and an ultraviolet light area (especially UVA with the wavelength range of 315-400 nm), and the anti-reflection eye-protecting functional paper has the beneficial effects that the anti-reflection eye-protecting functional paper is good in anti-reflection effect and good in anti-reflection effect. The damage of harmful light to the retina of human eyes can be effectively reduced, and the effects of preventing myopia and protecting eyes are achieved; meanwhile, compared with coated raw paper, the reflectivity of the anti-reflection type eye protection functional paper is increased by 0.2% on the contrary within the 500-700 nm wave band comfortable for human eye reading, and the reading experience feeling of readers is further guaranteed.

The invention provides a photovoltaic module gap synergistic film and a preparation method and application thereof.The photovoltaic module gap synergistic film comprises a bonding layer, a functional layer and a composite base material layer are sequentially arranged on the bonding layer from bottom to top, the bonding layer is a pressure-sensitive adhesive layer containing an activatable material, and the functional layer is a functional layer containing an ethylene copolymer with the melting point ranging from 70 DEG C to 120 DEG C; therefore, not only are the positioning bonding performance and the reflectivity of the product improved, but also the overall performance of the photovoltaic module is ensured, and meanwhile, the gap synergistic film of the photovoltaic module is torn off from the battery in a lossless manner so as to repair or recycle the photovoltaic battery.

The invention discloses a low-absorption high-emission radiation refrigeration coating material, which comprises a bottom coating and a surface coating, the bottom coating comprises BaSO4 with different particle sizes and a film forming substance, and the surface coating comprises a surface layer filler and a film forming substance. The invention also discloses a preparation method of the material, which comprises the following steps: dispersing and mixing BaSO4 with different particle sizes, a film-forming substance and a solvent to obtain bottom layer slurry, and filtering to obtain a bottom layer coating; dispersing and mixing a surface layer filler, a film-forming substance and a solvent to obtain surface layer slurry, and filtering to obtain a surface layer coating; the prime paint is sprayed on the surface of the base material, and then the surface paint is sprayed on the surface of the prime paint; and curing to obtain the coating. The material has excellent solar spectrum reflection performance, high infrared radiation performance of an atmospheric window and relatively good ultraviolet aging resistance, and can be applied to multiple fields of high-end optical instrument detection, communication electronics, petrochemical engineering, energy-saving buildings and the like.

The invention belongs to the technical field of coating materials, and provides an anti-laser radiation coating composition and a coating preparation method, the coating composition comprises a heat insulation layer composition, a transverse heat dissipation layer composition and a reflection layer composition; wherein the heat insulation layer composition is prepared from the following components in parts by mass: 60 to 65 parts of film-forming resin, 17.5 to 20 parts of ceramic particles and 17.5 to 20 parts of ceramic hollow spheres; the transverse heat dissipation layer composition is prepared from the following components in parts by mass: 90 to 95 parts of film-forming resin and 5 to 10 parts of high-thermal-conductivity boride; the reflecting layer composition comprises the following components in parts by mass: 58-65 parts of film-forming resin, 30-39 parts of ceramic particles and 3-5 parts of chopped fibers.

The invention discloses an environment-friendly cooling anti-radiation refrigeration coating and a preparation method thereof, and belongs to the technical field of coating preparation. The raw materials are prepared from core materials, auxiliary materials and ingredients. The core material is prepared from a main raw material, hollow glass beads and environment-friendly resin, the auxiliary material is prepared from a nano additive and mineral pigment, and the ingredients are prepared from ferroferric oxide, nano titanium dioxide, diopside and polyvinylidene fluoride. The main raw materials comprise carbon quantum dots, carbon nanofibers, carbon nanospheres and graphene quantum dots; the environment-friendly resin base material is prepared from waterborne polyurethane resin, rosin resin, shellac resin and polytetrafluoroethylene; the nano additive is composed of silicon carbide, carbon black, carbon fibers, magnesium borate and carbon nanotubes. According to the coating, solar energy can be converted into light energy, the sunlight reflectivity of the coating is improved through the unique optical property of the coating, the sunlight reflectivity of the coating can be correspondingly improved along with increase of the sunlight intensity, and therefore the situation that a building absorbs excessive heat is avoided.

The invention discloses an application and verification method of antisymmetric chiral metasurface and phase amplitude regulation and control, and belongs to the field of micro-nano optics, the antisymmetric chiral metasurface comprises a surface layer, a middle layer and a back plate layer which are sequentially arranged from top to bottom, and the surface layer is composed of a left semicircular ring and a right semicircular ring; the two ends of the side, facing the right half ring, of the left half ring are bent towards the circle center to form a first protrusion and a second protrusion, one end of the side, facing the left half ring, of the right half ring is bent towards the circle center to form a third protrusion, and the third protrusion and the first protrusion are symmetrically arranged about the circle center. The length of the third protrusion is equal to that of the first protrusion, and the length of the first protrusion is larger than that of the second protrusion. By adopting the application and verification method of the antisymmetric chiral metasurface and phase amplitude regulation and control, by breaking C2 (second-order rotation) symmetry and mirror symmetry, not only can spin decoupling phase control be realized through chiral phase, but also the amplitude of reflected waves can be adjusted by using circular dichroism.

The invention discloses a preparation method of a gallium nitride-based resonant cavity light-emitting diode and a product of the gallium nitride-based resonant cavity light-emitting diode. The method sequentially comprises the following steps: epitaxially growing a gallium nitride-based epitaxial layer on an original substrate, and preparing a plurality of curved surface structures on one surface of the gallium nitride-based epitaxial layer; sequentially depositing a current expansion layer, a curved surface reflector and a transition layer on the curved surface structure along a first direction, and preparing a regional metal substrate corresponding to the size of the transition layer on the surface of the transition layer of each curved surface structure; placing one side of the regional metal substrate on a temporary substrate, removing the original substrate, and polishing, thinning and planarizing the other surface of the gallium nitride-based epitaxial layer; depositing a plane mirror on the other surface of the gallium nitride-based epitaxial layer, and preparing an electrode; and removing the temporary substrate to obtain the single independent gallium nitride-based resonant cavity light-emitting diode. According to the invention, metal curled edges and side wall damages during obtaining of an independent device can be improved, an experimental process is optimized, and performances of light output power and the like of the device are improved.

The invention discloses a cavity enhanced Fabry-Perot interference resonant cavity, and belongs to the technical field of sensing detection. The transduction film is used as a transduction medium, vibration is generated through induction, signals are converted into vibration of the film, optical signals are modulated, and information to be measured can be obtained. According to the invention, the cavity enhancement structure is introduced, the optical fiber collimator and the transduction film jointly form an interference resonant cavity, and the phase sensitization of the optical microcavity is realized by improving the reflectivity of the cavity and prolonging the time of capturing light. Through stable interference of the resonant cavity, strong optical constraint is generated, and interaction between a light beam and a transmission signal is enhanced. In addition to the characteristics of high sensitivity, small loss, small size and high integration, the device has high expandability in the design aspects of bandwidth and sensitivity, and good sensing performance and design flexibility of the device provide a new opportunity for propelling the military and civil fields such as monitoring technology and biomedicine.

The invention belongs to the technical field of electrochromic devices, and relates to a flexible electrochromic device for heat management of a curved transparent enclosure structure. The electrode is formed by assembling flexible polyethylene glycol terephthalate-indium tin oxide as transparent conductive electrodes on the two sides to clamp a silver-based gel electrolyte. The device is simple in preparation method, controllable in composition and structure and easy to expand; the deposition quality of silver ions is improved through electrode surface plasma cleaning and modification; by applying and removing voltage, the device has reversible dual working modes: an initial state is a solar heating mode, and at the moment, the device has high sunlight transmissivity; voltage is applied to the device to excite deposition of silver on the outer side electrode, at the moment, a radiation cooling mode is adopted, and at the moment, the device has high sunlight reflectivity and high and medium far infrared emissivity; the device has excellent sunlight modulation capability and mechanical stability, and has great application prospects in the aspect of all-season dynamic thermal management of curved transparent enclosure structures such as buildings and automobiles.

The invention discloses a wide-angle phase difference depolarization reflector with silicon as a substrate. According to the reflector, the metal nickel-chromium film layer and the metal silver film layer are combined, so that the binding force between the silicon substrate and the metal film layer is improved; high reflectivity and low polarization sensitivity of a signal channel are realized by utilizing the characteristics of the metal film layer; the metal film layer is prevented from being oxidized by using the protective layer, so that the reflecting mirror has relatively high environmental adaptability; and phase difference depolarization in a wide angle range of a signal channel is realized by utilizing a plurality of dielectric phase suppression film layers. The wide-angle phase difference depolarization reflector with the silicon substrate has the advantages that the number of film layers is small, the technology is easy to implement, and reliability is good.

The invention discloses a self-adaptive endoscope system and method based on photoacoustic image structure feature recognition, and relates to the technical field of photoacoustic endoscopic imaging, the system comprises a control system, a light source system, an endoscope probe, a feedback system, a signal processing system and a computing terminal; the control system synchronously triggers the light source system and the signal processing system, the light source system comprises a white light source and a laser, laser exciting light enters the endoscope probe through a single-mode optical fiber, scanning is controlled by a micro-electro-mechanical system (micro-electro-mechanical system scanning micro-mirror) scanning micro-mirror in the probe, scanning light enters the focusing lens group through the relay lens, and the focusing lens group is connected with the signal processing system through the relay lens. A to-be-imaged tissue surface is irradiated by the liquid lens, echo signals are acquired and processed by the signal processing system, photoacoustic image reconstruction is completed, the feedback system is connected with the liquid lens in the probe, and optical signals of optical images are acquired and reconstructed by an eyepiece at the top of the endoscope and a matched CMOS (complementary metal oxide semiconductor).

The invention discloses a photovoltaic and photo-thermal comprehensive utilization system based on tower type photo-thermal power station optimization, and belongs to the technical field of power generation. According to the invention, by optimizing the structure of the concentrating tower, the original traditional scheme of directly concentrating light to a heat receiver from a reflecting mirror field is optimized into a two-stage reflection design, that is, the reflecting mirror field is used as first-stage reflection, the position of a frequency division film is used as second-stage reflection, and a photovoltaic cell and the frequency division film are placed at the second-stage reflection position. A frequency division film is plated on the surface of a photovoltaic cell panel, so that visible light high-grade energy wave band transmission and absorption are improved, reflection of visible light and low-grade infrared light to a certain degree is maintained, normal operation of a condensation type photo-thermal system is guaranteed, spatial separation of high-grade visible light photon energy and low-grade near-infrared light photon energy is completed, and the energy efficiency is improved. Therefore, frequency division utilization of solar energy is achieved, solar energy utilization is achieved in a mode of combining a photovoltaic system and a photo-thermal system, and the power generation efficiency is improved. The system is suitable for solar power generation combining a photovoltaic system and a photo-thermal system.

The present application discloses an integrated wave-absorbing and heat-insulating composite material and a preparation method thereof, and relates to the technical field of wave-absorbing composite materials; the application aims to solve the technical problem that the electromagnetic wave absorption performance and heat-insulating performance of existing composite materials need to be improved; the integrated wave-absorbing and heat-insulating composite material has silicon carbide nanowires as a skeleton, and the surface is modified with nano-magnetic particle materials; wherein the mass ratio of the silicon carbide nanowires to the nano-magnetic particles is 1:0.5-2.

The utility model provides a backlight module and a display device. The backlight module comprises a circuit board, a first reflecting layer and a second reflecting layer which are sequentially stacked from bottom to top and further comprises a plurality of light-emitting units, each light-emitting unit comprises a lens and at least one light-emitting part, the light-emitting parts are fixed to the circuit board, and the lenses cover the light-emitting parts; the first reflecting layer is provided with a plurality of first through holes, and the light-emitting pieces penetrate through the first through holes in a one-to-one correspondence mode. The second reflecting layer is provided with a plurality of second through holes, and the lenses cover the first reflecting layer and penetrate through the second through holes in a one-to-one correspondence mode. The reflectivity of the area below the lens can be improved, so that the backlight effect of the backlight module is improved, and the display effect of the display device is improved.

The invention relates to the field of thin film materials, and provides a patterned low-internal-stress high-reflection layer and a preparation method and application thereof, and the high-reflection layer comprises an n (Si / Ni) layer, a Cr layer, a cap layer and a patterned reflection layer which are sequentially located on a gamma-Al2O3 substrate from bottom to top; the n (Si / Ni) layer is formed by alternately depositing a Si layer and a Ni layer for n periods, and the alternating period n is 30-60; the average thickness of the Si layer is 15-40 nm, the average thickness of the Ni layer is 3-8 nm, and the ratio of the average thickness of the Si layer to the average thickness of the Ni layer is 5: 1; the lowest layer of the n (Si / Ni) layer is a Si layer and is connected with the gamma-Al2O3 substrate, and the uppermost layer is a Ni layer. The multilayer composite structure design is adopted, high reflectivity, low internal stress, low defect density and chemical stability are achieved, the problems that a traditional high-reflection layer is large in internal stress, large in defect density and the like are solved, and the method can be applied to the fields of photoetching masks, optical imaging and sensors.

The invention discloses a photovoltaic module gap synergistic positioning adhesive tape and a preparation method thereof. The photovoltaic module gap synergistic positioning adhesive tape comprises a base material layer, a functional layer and a bonding layer which are sequentially compounded from top to bottom. The gap synergistic positioning adhesive tape for the photovoltaic module is mainly applied between battery pieces and strings of the photovoltaic module, has a positioning function, and can improve the power generation power of the photovoltaic module through the light reflection performance; under the lamination temperature of 120-150 DEG C, a sufficient buffering effect is provided through the functional layer, so that the subfissure and fragment of the battery are prevented; the bonding layer is made of a polyethylene glycol oligomer containing t-butyloxycarboryl, and when the photovoltaic module needs to be repaired, the bonding layer can be heated by an infrared lamp to quickly lose viscosity, so that the photovoltaic module is easy to repair, more cell pieces are prevented from being broken when the positioning adhesive tape is torn off, and the service life of the photovoltaic module is prolonged. Meanwhile, by adopting the t-butyloxycarboryl polyethylene glycol oligomer, the raw materials can be promoted to be uniformly dispersed, and the viscosity and the reflectivity of the gap synergistic positioning adhesive tape for the photovoltaic module can be improved.

The invention relates to the technical field of laser sensing chips, and discloses an edge-emitting laser sensing chip and a preparation method thereof. The preparation method comprises the following steps: forming an epitaxial structure comprising a substrate layer, a lower cladding, a lower waveguide layer, an active layer for generating laser, an upper waveguide layer, an upper cladding and a cover layer which are stacked; a first groove, a second groove and a ridge structure comprising a single-mode filter region, a power amplification region and a functional region are formed on the epitaxial structure; forming an insulating layer, and forming a current injection surface on a part of the surface, exposed out of the ridge structure, of the first opening of the insulating layer; the second opening exposes part of the surface of the functional area of the ridge structure, and a sensing surface is formed between the first opening and the second opening; forming an inclined groove; and forming a nano sensing structure on the sensing surface. The inclined groove is formed in the ridge structure, so that laser emitted horizontally is converted into laser towards the sensing surface; a nano sensing structure is arranged on the sensing surface, the refractive index of an unknown to-be-detected substance is obtained, the application range is wide, and detection is simple and efficient.

The invention discloses a preparation method of a persistent radiation refrigeration film material, which comprises the following steps: preparing a composite polymer of PVDF-HFP and ZnO coated SiO2 nanoparticles, uniformly spraying the composite polymer on a film, and finally preparing the persistent radiation refrigeration film material. According to the PVDF-HFP porous structure prepared by the method, the reflectivity of the film is effectively improved, and an excellent cooling effect is realized. The introduced ZnO coated SiO2 nanoparticles can absorb high-energy ultraviolet photons and convert the high-energy ultraviolet photons into heat with small harm, so that the stability of ultraviolet rays is improved, and the film still keeps excellent cooling performance under long-term ultraviolet irradiation. Therefore, the problem that the radiation cooling performance of a radiation cooling material in the prior art is reduced due to the fact that the radiation cooling material is easily influenced by environmental aging, high temperature and ultraviolet irradiation is effectively solved, and the radiation cooling film has a more durable radiation cooling effect and a longer service life in an outdoor environment.

The invention relates to a super-hydrophobic thermal management composite coating synthesized by modified spent bleaching clay and a preparation method thereof. The preparation method comprises the following steps: carbonizing a part of spent bleaching clay powder in a tubular furnace; carrying out air burning oxidation treatment on one part of spent bleaching clay powder in a tubular furnace; the method comprises the following steps: respectively adding two parts of spent bleaching clay powder into a mixed solution of hexadecyl trimethyl siloxane, tetraethyl silicate, ammonia water and ethanol, and carrying out hydrophobic treatment to obtain a dispersion liquid; sequentially centrifuging, washing and drying the dispersion liquid to obtain modified oxidized and carbonized spent bleaching clay powder; sequentially carrying out washing, drying and plasma treatment on the two surfaces of the substrate; mixing the oxidized and carbonized waste white clay powder with resin and a curing agent respectively, then adding the mixture into a solvent for stirring treatment, and preparing a spraying coating through ultrasonic oscillation treatment; the spraying paint is sprayed on the two faces of a prepared substrate respectively, and the modified spent bleaching clay synthesized super-hydrophobic thermal management composite coating is obtained after curing. The composite coating prepared by the method can obviously reduce the energy consumption in the aspects of heating and cooling.

The invention discloses a colored heat insulation type radiation refrigeration film based on hollow SiO2 microspheres and a preparation method thereof, and belongs to the technical field of new materials. The monodisperse hollow SiO2 microspheres are used for preparing a three-dimensional photonic crystal structure color, the hollow structure can form a high refractive index ratio with a polymer and endow the film with a beautiful structural color, the heat conductivity of the material is reduced, the purposes of heat insulation and heat preservation are achieved, and the heat management capacity is effectively improved. The micron-sized particles for reflecting sunlight are large in particle size and cannot be filled in gaps of the photonic crystal structure to damage the structural color, the polymer for film forming permeates into the gaps of the photonic crystal structure, and the micron-sized particles and the photonic crystal are cured in the polymer film, so that the film forming effect is improved. The problem that the structural color and the radiation refrigeration material are poor in bonding strength is solved. The daytime net refrigeration power of the prepared film can reach 95.6 W / m < 2 >, the temperature of a building can be reduced by 9.7 DEG C, raw materials are low in cost and easy to obtain, a metal reflecting layer is not needed, the preparation method is simple, and the film is expected to be applied to energy-saving buildings on a large scale.

The preparation method comprises the following steps: dissolving PVDF (Polyvinylidene Fluoride) in acetone, adding a small amount of Tween 80, carrying out oil bath at 60 DEG C, and uniformly mixing until the solution is transparent, so as to prepare a polymer solvent system; and standing and defoaming the obtained solution, pouring into a mold, and naturally volatilizing by controlling the humidity to obtain the polymer porous membrane with the porous microsphere net structure. According to the method, phase separation is induced through solvent evaporation, and synchronous construction of micron holes and nanospheres of the PVDF porous membrane is achieved. Compared with a traditional phase separation membrane preparation technology, the method has the advantages that the pore size of the PVDF porous membrane can be greatly expanded, controllable preparation of micron / nano pores of the PVDF porous membrane is realized, and the prepared porous membrane has more excellent reflectivity and cooling performance.

The invention belongs to the technical field of target materials, and particularly discloses a silver alloy target material and a preparation method and application thereof. The silver alloy target material comprises the following raw material components in percentage by weight: 99.25 to 99.93 percent of Ag, 0.05 to 0.55 percent of Ce, 0.01 to 0.05 percent of aluminum-copper alloy and 0.01 to 0.15 percent of manganese-copper alloy. On one hand, a certain amount of Ce, Al-Cu alloy and Mn-Cu alloy are added into Ag for microalloying; and on the other hand, the microstructure form is regulated and controlled in combination with forging and hot rolling treatment in the manufacturing process. And finally, on the premise that the reflectivity is not reduced, the vulcanization resistance and the oxidation resistance are greatly improved, the silver alloy target material has high hardness and is easy to process, the time for starting blackening vulcanization of the silver alloy target material is 8.0-11.2 hours, the time for starting blackening oxidation of the silver alloy target material is 7.5-10.6 hours, and the Vickers hardness of the silver alloy target material is 97-138.

The invention relates to the technical field of optical thin films, and particularly discloses a preparation method of a super-hydrophobic optical thin film capable of being applied to different wavelengths, and the preparation method comprises the following steps: S1, carrying out surface cleaning, surface polishing and surface cleaning on a glass substrate, and then sputtering and depositing a silicon oxide film to obtain deposited glass; s2, performing metal copper fused deposition on the surface of the deposited glass, and then performing annealing treatment and nickel gun purging to obtain a semi-finished product; and finally, performing nano dry etching to obtain a finished product. The film has the advantages of hydrophobic effect, low reflectivity and high transmissivity.

The invention relates to the technical field of optical coating, in particular to a partitioned coating method for a spatial extreme ultraviolet band reflector, which aims to coat different or same films on more than two or more regions at certain intervals. The method comprises the following steps: firstly, designing more than two or more EUV wave band multilayer films, wherein the structures and the central wavelengths of the EUV multilayer films can be different; then designing an adjustable shielding coating tool which is in direct contact with the mirror surface of the reflecting mirror; the EUV wave band is plated on the surface of the cleaned reflecting mirror in a regional mode through an adjustable shielding film plating tool; and finally, testing the reflecting mirror after film coating. According to the invention, the boundary of the coating area is clear and has no shadow effect, and stray light crosstalk is reduced; and the film is good in film forming quality, small in film stress, excellent in optical performance, good in film firmness and high in space environment adaptability.