78 results about "Infrared reflectivity" patented technology

The invention discloses a poplar degenerated forest stand accurate restoration method, and relates to the technical field of poplar degenerated forest stand restoration, and the method comprises the steps: obtaining a multi-temporal satellite remote sensing image and an unmanned plane multi-spectral image of a target area; in combination with soil moisture content, rhizosphere respiration rate and micrometeorological data collected by ground Internet of Things sensing nodes arranged in a forest stand, geographic coordinate registration and time sequence alignment are performed on the data to form a multi-source observation data set; the method comprises the following steps: extracting vegetation indexes, short-wave infrared reflectivity, soil moisture and rhizosphere physiological parameters based on a multi-source observation data set, constructing a degradation diagnosis index fusing spectral change, moisture stress and root activity, calculating the degradation degree of each pixel, and generating a degradation level spatial distribution diagram; the area with the degradation degree reaching a set threshold value is determined as a to-be-repaired area; and selecting representative poplar individuals in the to-be-repaired area, measuring the photosynthetic ability of the individuals, and calculating the individual competition intensity in combination with the three-dimensional point cloud data.

The invention discloses a hot-pressing control method and system for a flexible circuit board, and particularly relates to the technical field of flexible electronic manufacturing process control, and the method comprises the following steps: calculating a heat conduction equilibrium coefficient through collecting the temperature and heat flux density data of each region in the flexible circuit board, and achieving the real-time evaluation of a heat diffusion characteristic; in combination with an infrared scanning mode, acquiring reflectivity data, analyzing dynamic change of the reflectivity data along with time, and identifying an abnormal region in which coating residues possibly exist; further comparing the position relationship between the thermal diffusion anomaly and the infrared reflection anomaly, screening a space overlapping region as a high-risk point, and executing a preset regulation and control strategy; according to the method, the heat conduction equilibrium coefficient is calculated by collecting heat flow and temperature data, the coating residue abnormal area is recognized by combining infrared reflectivity time sequence characteristics, the high-risk area is screened based on the space overlap ratio for dynamic regulation and control, accurate recognition, differential control and closed-loop optimization of hot pressing defects are achieved, and the hot pressing quality and consistency are improved.

The invention provides a sweet menu embryo pelleting seed breakage rate detection method based on machine vision, and relates to the technical field of seed detection.The method comprises the steps that firstly, visible light and near-infrared images of seeds under standard illumination and non-standard visible light images under multiple light sources are collected, and reflectivity calibration and polarization difference correction processing are carried out; features such as colors and textures are extracted based on visible light and near-infrared reflectivity images, and multispectral feature vectors are constructed; a surface normal vector is calculated by using a photometric stereoscopic vision technology and combining a plurality of non-standard visible light images, an initial three-dimensional height map is generated through integration, and a plurality of abnormal judgment features are extracted to mark a suspected damaged area. And further calculating an edge sharpness index, removing a mechanical damage area, and determining a final damage area and a three-dimensional contour thereof. And finally, combining the volume loss rate, the projection area ratio and other multi-dimensional features with the multispectral feature vector to construct a damage probability prediction model, thereby realizing accurate and efficient detection of the seed damage rate.

The present application relates to thermal insulation coating technical field, specifically to a kind of low VOCs ultraviolet resistant thermal insulation coating composition and its performance testing device, consisting of the following mass parts components: water-based acrylic resin 30-45 parts, nitrogen-doped graphene 1-3 parts, nano composite powder 2-5 parts, low water absorption and expansion glass microsphere 8-12 parts, silane coupling agent modified sepiolite 5-10 parts, silane coupling agent KH560 0.5-1.5 parts, ultraviolet absorber UV-9 0.3-0.8 parts, hydroxyethyl cellulose thickening agent 0.2-0.5 parts;Composition meets the following conditions: (1) VOCs content≤50g / L;(2) ultraviolet absorption rate≥95%;The present application realizes the purpose that VOCs content is far lower than traditional solvent type coating through the synergistic effect of water-based acrylic resin system and low water absorption and expansion glass microsphere, while nitrogen-doped graphene and nano ITO-SiO2 Composite powder form ultraviolet-infrared dual-effect shielding layer, ultraviolet absorption rate, infrared reflectivity greatly improve, solve the problem that traditional anti-UV coating function is single, VOCs is overproof.

The invention provides an unmanned aerial vehicle control method and system integrating scanning and photovoltaic panel cleaning, and the method comprises the steps: scanning the surface of a photovoltaic panel, obtaining a visible light image, a near-infrared multispectral image and three-dimensional point cloud data, carrying out the fusion processing, and carrying out the calculation of the three-dimensional point cloud data based on the joint criterion of the near-infrared reflectivity difference and the three-dimensional space distribution. Distinguishing the types and pollution degrees of sheltering objects on the surfaces of the photovoltaic panels; according to the shielding object type and the pollution degree, a pollution thermodynamic diagram of the surface of the photovoltaic panel is generated, and a cleaning operation path of the unmanned aerial vehicle is dynamically planned based on the pollution thermodynamic diagram; a self-adaptive cleaning module of the unmanned aerial vehicle is controlled to execute cleaning operation according to the cleaning operation path; after cleaning operation is completed, the surface of the photovoltaic panel is scanned again, data obtained after cleaning is compared with data before cleaning, cleaning parameters are optimized through iterative learning, a detection-action-verification closed loop is formed, and full automation and intelligentization of the photovoltaic panel unmanned aerial vehicle in all links of detection, decision making, cleaning and verification are achieved.

The invention discloses a mulberry twig clamping and positioning method and system, belongs to the technical field of intelligent mulberry leaf picking equipment, and aims to solve the technical problems that an existing RGB camera is easily interfered by illumination, and picking damage is caused due to the fact that a demarcation point of a tender branch and an old branch is difficult to accurately recognize. According to the method and system, 500-600 nm visible light and 750-900 nm near-infrared band images are synchronously collected through a multispectral imaging device, HSV color space parameters are extracted, and a color gradient model is established; by analyzing the gradient change rate of the hue value H and the saturation degree S and combining the curvature change rate and the near-infrared reflectivity difference value, the transition boundary of the tender and old branches is accurately judged, and the three-dimensional coordinates of the clamping datum point are generated by dynamically shifting 5-15 mm towards the side of the tender branches. According to the scheme, the limitation of single hue detection is broken through, the xylem recognition capability is enhanced by utilizing multispectral information, the clamping accuracy is improved, the method is suitable for automatic operation of a top-remaining picking mode in large-scale silkworm and mulberry planting, the picking efficiency can be effectively improved, and branch damage can be reduced.

The invention discloses a CSP soaking pit furnace wall thermal insulation material which is of a gradient composite structure comprising an instantaneous high temperature resistant inner layer, a thermal insulation middle layer and a radiation heat exchange outer layer, and the instantaneous high temperature resistant inner layer is made of a composite material comprising nano aerogel and high temperature resistant whiskers; the heat insulation middle layer is made of a nano-particle modified ceramic fiber material; and the radiation heat exchange outer layer adopts a ceramic coating with high infrared reflectivity. The overall heat conductivity coefficient is reduced through the synergistic effect of the low heat conductivity of the inner layer, the high-temperature shrinkage resistance of the middle layer and the radiation heat dissipation performance of the outer layer, good instantaneous high temperature resistance and high-temperature stability are considered, and the heat preservation effect is remarkably enhanced; and in combination with various surface connection improvement means, a heat conduction path can be effectively prolonged, a heat bridge effect can be blocked, heat loss is further reduced, heat energy loss and operation energy consumption of the furnace body are remarkably reduced, and rapid repair is facilitated.

A safety helmet includes a shell configured to surround a user's head, and an infrared-reflective layer disposed inside the shell. The infrared-reflective layer is configured to reflect at least a portion of incident infrared radiation that passes through the shell. The infrared-reflective layer has an infrared reflectance of at least 40%. The safety helmet can further have an evaporative cooling pad positioned within a cavity defined by an inner surface of the shell. A method of manufacturing a safety helmet is also disclosed.

The invention relates to the technical field of information processing, in particular to an intelligent identification method, device and equipment for a logistics environment-friendly bag and a storage medium. A multi-channel input tensor is constructed through a visible light texture image, a near-infrared reflectivity image and three-dimensional point cloud data of the logistics environment-friendly bag; a light diffusion model is used for enhancing a low-illumination image in the multi-channel input tensor, the standardized multi-channel input tensor is input into an OneThinker model for contamination degree quantification, and a life prediction basic feature vector is constructed based on contamination degree information, accumulated use frequency information and stress historical information; and based on the life prediction basic feature vector, the historical use data and the transportation environment temperature and humidity data, adopting a lightweight graph neural network or a long-short-term memory network to model an aging process of the logistics environment-friendly bag, and outputting a predicted value of the number of remaining usable times of the logistics environment-friendly bag according to the aging process. And accurate identification, intelligent state evaluation and scientific life prediction of the logistics environment-friendly bag can be realized.

This invention relates to the field of image sensing data processing and discloses a method for diagnosing the thermal environment of blue-green spaces in cold-region cities based on multispectral remote sensing. The method includes the following steps: acquiring multispectral remote sensing images, three-dimensional building elevations, and solar apparent shape parameters; calculating the illumination shading coefficient of blue-green space pixels to form a three-dimensional dynamic shadow mask; constructing a microscopic phase transition evolution operator using the sensitivity gradient of radiation intensity in different polarization directions and mid-infrared reflectivity; inputting the mask and operator into the thermal infrared radiation measurement equation to reconstruct the dynamic surface temperature; solving the surface energy balance equation based on the dynamic surface temperature, separating the latent heat storage of phase transition energy, and constructing a latent heat buffer index; and performing a comprehensive diagnosis of the thermal environment health based on this index. This invention effectively overcomes the temperature measurement errors caused by complex shading and phase state interweaving, accurately isolates the latent heat energy of phase transition, and achieves precise positioning and objective quantitative diagnosis of microclimate anomalies in cold-region cities.

A high infrared reflectance Cu-TiO2 composite coating and its preparation method are disclosed. The method involves mechanically ball-milling Cu powder and TiO2 powder, wherein the TiO2 mass percentage is 10%–20%. The mixed powder is then deposited onto the substrate surface using cold spraying, preferably with a Ti buffer layer. This invention utilizes the dispersion strengthening, optical synergistic enhancement, and chemical barrier effect of TiO2 particles in the Cu matrix to improve the coating's hardness and wear resistance while simultaneously increasing infrared reflectance. Experiments show that when Cu:TiO2 = 85:15, the coating achieves an absolute infrared reflectance of 94.02% in the 1900–2300 nm wavelength band, higher than pure Cu coatings and existing cold-sprayed Ag and Al coatings. Furthermore, the coating is dense and oxidation-free. This invention features a simple process and low cost, making it suitable for applications such as solar collectors, infrared reflectors, and optical devices.

The invention belongs to the technical field of variable optical films, discloses a multifunctional composite variable optical film and a preparation method thereof, and aims at solving the problems that an existing variable optical film is single in function, unstable in optical performance, poor in flexibility and bending resistance and low in process precision. The preparation method comprises the following steps: pre-treating the base material: sequentially carrying out plasma cleaning on the PET base material and sputtering the ITO conductive layer, sequentially carrying out ultrasonic cleaning on the glass substrate and preparing the YAG powder enhancement layer; the coating of the functional layer is that the surface of the ITO layer of the PET-ITO composite base material is coated with a PDLC layer and an electrochromic layer, and the surface of the YAG layer of the YAG-glass composite base material is coated with a temperature-sensitive layer; the compounding and curing are as follows: firstly laminating after aligning and compounding, and then carrying out UV segmented curing. The light transmittance of the product can be adjusted by 5-95% in an electric field, and the infrared reflectivity is gt; and after the ITO layer is bent for 1000 times and the bending radius is 5mm, the resistance change rate is less than or equal to 10%, so that the ITO film is suitable for a sunshade film for a vehicle and an intelligent window of a building.

This invention relates to the field of ceramic materials and their preparation technology, and particularly to a Pt-doped perovskite ceramic composite material, its preparation method, and its application. The Pt-doped perovskite ceramic composite material provided by this invention uses platinum (Pt) as the dopant phase, and combines a sol-gel assisted doping method with a two-step sintering process using solid-state methods to uniformly distribute Pt in nanoparticle form on Sm... 0.5 Sr 0.5 The ZrO3 ceramic grain boundary region (forming a grain boundary nano-Pt phase) enhances near-infrared reflectivity and reduces thermal radiation absorption while maintaining the stability of the main phase lattice. This invention reduces the thermal conductivity of the ceramic composite material while improving its high-temperature stability through the interfacial regulation effect of the grain boundary nano-Pt phase. This invention also significantly improves the toughness and crack resistance of Pt-doped perovskite ceramic composite materials by constructing Pt nanoparticles to "pinneck" cracks at the ceramic grain boundaries, thus overcoming the intrinsic brittleness of ceramic materials.

The invention relates to the technical field of quartz glass surface treatment, in particular to a manufacturing method of a quartz glass surface high-temperature-resistant coating with high infrared reflectivity, and the method comprises the following steps: (1) preparing a water-based dispersion liquid: mixing deionized water, ethylene glycol, polyethylene glycol and a water reducing agent; (2) preparing coating slurry: mixing quartz glass micro powder, hydrophilic fumed silica particles, a non-metal sintering aid and a water-based dispersion liquid, and carrying out ball milling treatment; (3) carrying out hydrophilization treatment on the quartz glass substrate; (4) coating of a slurry layer: coating the slurry obtained in the step (2) on the surface of the quartz glass substrate treated in the step (3); and (5) sintering the slurry layer: performing high-temperature heat treatment on the quartz glass treated in the step (4) to form the high-temperature-resistant coating. According to the preparation method, the high-temperature-resistant coating with the infrared relative reflectivity of 90% or above can be prepared, and the heating performance and the temperature uniformity of the quartz glass-based reaction cavity are effectively improved.

The invention discloses a high-temperature stable spectrum selective infrared film and a preparation method thereof, and belongs to the technical field of infrared functional materials. The thin film adopts a Fabry-Perot cavity multi-layer structure and sequentially comprises a bottom infrared reflecting layer, a top infrared reflecting layer, a top infrared reflecting layer, a bottom infrared reflecting layer and a top infrared reflecting layer from bottom to top, the intermediate dielectric resonance layer is prepared from an infrared transparent semiconductor material; the upper-layer part absorption layer is a metal thin film; the top packaging protection layer is made of an infrared transparent dielectric material; wherein the intermediate medium resonance layer is of a crystalline structure formed through thermal pretreatment, and the crystalline structure fundamentally inhibits interdiffusion of elements between film layers and structural phase change at high temperature; through the design, the thin film has low emissivity in atmospheric window wave bands of 3-5 microns and 8-14 microns, has high emissivity in a non-detection wave band of 5-8 microns, and can be used at the temperature of 600 DEG C for a long time.

The invention relates to the technical field of intelligent agriculture, and discloses a scene analysis method and system based on multi-modal understanding, and the method comprises the steps: obtaining the multi-modal perception data of fruits, and generating an initial state data set; performing texture analysis based on the surface image, calculating roughness and uniformity parameters, and combining to obtain a skin toughness index; analyzing near-infrared reflectivity characteristics, calculating a sugar degree index through a regression model, calculating moisture content through a correction model, and evaluating the maturity; based on the toughness index and the maturity value, initial picking parameters including the speed, the clamping force and the angle are generated; collecting contact force data in real time, and calculating deformation quantity and deformation rate indexes; comparing the deformation rate with a damage threshold value to generate an adaptive force control sequence; and recording a picking result, and optimizing a parameter mapping rule. The technical problem that traditional fixed-mode picking cannot adapt to fruit individual differences is solved.

The invention discloses a comfortable double-layer structure metallurgical heat-insulation flame-retardant protective fabric and a preparation method, according to the scheme, through preparation and application of flexible and knittable aramid fiber aerogel short fibers, the light weight and physical and chemical properties of the fabric are guaranteed, and the heat-insulation performance is remarkably improved; moreover, through the application of the high-modulus fiber blended binding yarns, the space structure between the outer layer and the inner layer is increased, and the heat insulation performance is improved; besides, through the construction of a double-layer fabric weave structure, the compounding of multiple functions such as molten metal adhesion and burning through resistance, high temperature resistance and high heat insulation of the fabric is realized, meanwhile, through interweaving of binding yarns, a plurality of rhombic independent function zones with the warp-direction included angle of 60 degrees are formed on the surface layer by interweaving points, molten metal slippage is facilitated, and meanwhile, the air permeability of the protective fabric is improved; and moreover, the uniform metal aluminum film is prepared on the surface of the fabric in a magnetron sputtering manner, so that the visible light and near-infrared reflectivity of the film is improved, the adhesive force of the film is enhanced, and the problem that a traditional aluminum film is easy to fall off is solved.

The application provides a preparation method and application of a high near-infrared reflective red pigment. 1‑x RE x O5; wherein RE is at least one selected from La, Ce, Pr, Nd, Sm, Eu, Gd, Dy, Y, Tm, Yb and Lu. The red pigment is obtained by doping with a rare earth element RE and using a high-temperature solid-phase synthesis method, so that the a* range of the red pigment is changed, and the redness and near-infrared reflectivity of the red pigment are improved.

The invention relates to the technical field of quartz glass processing, in particular to a method for preparing a gold infrared reflecting layer on a quartz glass product, which comprises the following steps: S1, cleaning: cleaning the quartz glass product; s2, pre-treating: pre-treating the cleaned quartz glass product in a hydrofluoric acid solution for a certain time, and washing the quartz glass product after the pre-treatment is finished; s3, coating: uniformly coating the surface of the quartz glass product with the prepared gold coating, and drying to form a gold infrared reflecting layer on the surface of the quartz glass product; and S4, performing high-temperature heat treatment, namely performing high-temperature heat treatment on the dried quartz glass product at 950-1100 DEG C in an atmospheric environment. By optimizing the pretreatment process, the coating formula and the heat treatment process, the defects in the prior art are effectively overcome, high infrared reflectivity, strong binding force and excellent corrosion resistance are considered, metal impurity pollution is avoided, the process is simple and efficient, and the coating has wide application prospects in the high-end fields of semiconductors, aerospace and the like.

The application relates to the technical field of water environment remote sensing monitoring, and provides a water vegetation type monitoring method and device based on optical and SAR satellite images. The method comprises the following steps: acquiring optical remote sensing image data and radar image data of the same water area after spatiotemporal registration; acquiring optical image band data, near-infrared reflectivity and red light band reflectivity of each pixel point from the optical remote sensing image data; selecting sub-channel features corresponding to the pixel points from cross-polarization channel feature data; obtaining normalized vegetation indexes of each pixel point based on the near-infrared reflectivity and the red light band reflectivity; obtaining classification results corresponding to each pixel point based on the normalized vegetation indexes, the optical image band data and the sub-channel features, so as to determine all water vegetation types in the water area. The method realizes large-range, high-frequency and high-precision monitoring of water vegetation types in large shallow lakes.

This invention discloses a self-supporting strontium manganate nanofiber membrane for high-temperature insulation and its preparation method. The preparation method includes: 1) adding manganese salt, strontium salt, and catalyst sequentially to a solvent, stirring for a period of time, then adding itaconic acid, followed by a free radical polymerization initiator, and continuing to heat and stir until homogeneous to obtain a precursor solution; 2) spinning the precursor solution into a precursor fiber membrane using electrospinning technology; 3) directly placing the precursor fiber membrane into a high-temperature calcination furnace at a certain temperature for calcination, removing it after a period of time, and cooling it in room temperature air to obtain a self-supporting strontium manganate nanofiber membrane. This invention can prepare a strontium manganate nanofiber membrane with both excellent flexibility and infrared shielding performance, resulting in a self-supporting strontium manganate nanofiber membrane with advantages such as low gas-solid thermal conductivity, high infrared reflectivity, good high-temperature insulation, good thermal shock resistance, and high structural stability.

The application discloses an epoxy resin composition and a preparation method thereof, and the preparation method comprises the following steps: uniformly stirring bisphenol F type epoxy resin, a plasticizer, a stabilizer, a curing agent and a modifier, then adding the mixture into a mold, curing at 90-120 DEG C for 20-50 minutes, then curing at 160-180 DEG C for 0.5-2 hours, and cooling to room temperature to obtain a product; the modifier comprises mica iron oxide; the epoxy resin curing system contains epoxy groups, hydroxyl groups and polar groups such as ether bonds, amine bonds and ester bonds, can not only generate electrostatic attraction with a phase interface, but also can react with free radicals on the surface of a medium to form chemical bonds, and can endow the epoxy curing product with extremely high adhesive strength; in the application, the bisphenol F type epoxy resin EPON862 is used as a base resin, has moderate viscosity, can uniformly disperse the mica iron oxide and nano titanium white powder, and can simultaneously improve the impact strength and near-infrared reflectivity of the product.

We provide a wire grid polarizer capable of reducing infrared reflectivity. [Solution] The wire grid polarizer 10 comprises a transparent substrate 11 and a grid-like protrusion 12 arranged on one surface of the transparent substrate 11 at a pitch of 1 / 2 or less of the wavelength of the incident infrared light and extending in a predetermined direction. The grid-like protrusion 12 has an aluminum layer 12a, and further has a β-FeSi2 layer 12b and an amorphous FeSi2 layer 12c on one side of the aluminum layer 12a.

A safety helmet includes an outer shell configured for surrounding a head of a user, and an infrared reflective layer disposed in an interior of the outer shell. The infrared reflective layer is configured for reflecting at a least a portion of incident infrared radiation transmitted through the outer shell. The infrared reflective layer has infrared reflectivity of at least 40%. A method of manufacturing a safety helmet with an infrared reflective layer is also disclosed. The method may further produce a safety helmet having an evaporative cooling pad positioned within a cavity defined by the inner surface of the outer shell.

The invention discloses an infrared reflection pigment and a preparation method thereof, and the preparation method comprises the following steps: weighing a Y source, a Ce source, an Al source and a Mn source according to a chemical general formula of a product, x is less than or equal to 0.02, 0lt; y < = 0.2; stirring and mixing a Y source, a Ce source, an Al source, a Mn source, a complexing agent and a solvent to obtain a mixed solution, and adding the mixed solution into the precipitant solution for reaction to obtain an insoluble substance; and mixing the insoluble substance with a mineralizing agent, and calcining to obtain the infrared reflection pigment. According to the invention, based on the basic configuration of YAlO3, Ce with variable valence and an ion radius similar to that of Y is introduced to reduce chemical defects on the surface of a material, and Mn is introduced to bring certain lattice defects, so that the concentration of free carriers in crystals is reduced, and the near-infrared reflectivity of the pigment is improved.

A nasal spray device can include housing having a sensor and a nozzle having a housing interface with a graphical image thereon. The sensor can be configured to sense movement of the graphical image when the nozzle moves relative to the housing, for instance during administration of medicine from the nasal spray device. The sensor can include an infrared proximity sensor that senses infrared reflectivity from the graphical image. The infrared proximity sensor can also be used to measure distance to a surface of a vial within the housing to thereby detect insertion of the vial into the housing.

The application discloses a black special-shaped fine denier polyamide 6 cool feeling fiber master batch and a preparation method and application thereof, and belongs to the technical field of new materials. The black color is prepared by selecting three or more than three color dyes and using the color mixing principle, the absorption rate of the black color to near infrared rays is far less than that of carbon black in a conventional black master batch, and the infrared reflection capacity of polyamide 6 black master spinning fiber is greatly improved. The preferred inorganic filler can improve the spinning capacity of polyamide 6 and the infrared reflectivity of the master batch spinning fiber at the same time, and the application in summer outdoor polyamide 6 textiles has low heat absorption and temperature rise and excellent cool feeling effect.

An electronic device may include a display and a lens assembly that are supported by a housing. The lens assembly may include multiple lenses. The lenses and / or the display may include a polarizer to mitigate artifacts associated with a double bounce path of light through the optical system. The polarizers may include quarter wave plates and half wave plates. A polarizer in the lens assembly may have a polarization axis aligned with a polarization axis of polarizer in the display. The display may also include a geometric phase lens, which may redirect light from the display. Additionally or alternatively, the housing may be coated with a low-visible-reflectance-and-low-infrared-reflectance coating, which may further increase the contrast of the display.

The invention provides a polyaryletherketone composite film as well as a preparation method and application thereof, and relates to the technical field of composite materials. The composite film comprises soluble polyaryletherketone and titanium dioxide and boron nitride wrapped by the soluble polyaryletherketone, and has excellent permselectivity, radiation cooling performance and thermal stability. According to the technical scheme, the titanium dioxide and the boron nitride which have the advantages of high refractive index and wide band gap are introduced, the optical performance of the soluble polyaryletherketone is synergistically optimized, the prepared composite film maintains proper visible light transmittance while improving the near-infrared reflectivity, and the intermediate infrared emission performance is further enhanced; and the radiation cooling capacity is excellent.

The invention discloses yttrium-zirconium ceramic fiber aerogel with a grain boundary segregation phenomenon and high infrared reflectivity, and belongs to the field of oxide ceramic fiber aerogel thermal insulation materials. The preparation method comprises the following steps: preparing polyacetylacetonate yttrium-zirconium precursor powder according to a molar ratio of yttrium to zirconium of 10: 1-2: 1, mixing the polyacetylacetonate yttrium-zirconium precursor powder with a polymer spinning aid and a solvent according to a mass ratio of (10-30): 1: (20-40) to obtain a spinning solution, carrying out centrifugation or electrostatic spinning to form a layered aerogel precursor, heating to 900 DEG C at a speed of 3-5 DEG C / min, carrying out heat preservation for 2 hours, and carrying out cooling crystallization. The aerogel has a zirconium element grain boundary segregation phenomenon, the fiber diameter is 1-4 microns, the average near-infrared reflectivity exceeds 95%, the volume shrinkage rate in a 1500 DEG C long-term environment is smaller than or equal to 5%, and the aerogel has excellent high-temperature thermal stability and heat insulation performance and can meet the heat prevention and insulation requirements in extreme high-temperature scenes.