28results about How to "High absorption strength" patented technology

The invention relates to the technical field of photoelectricity, in particular to a light conversion agent based on a benzoxazole skeleton and a preparation method and application of the light conversion agent. The invention provides a light conversion agent based on a benzoxazole skeleton. The light conversion agent comprises an organic compound taking benzoxazole as a parent. According to the light conversion agent based on the benzoxazole skeleton, the problems that an existing light conversion agent is low in ultraviolet light absorption efficiency, and the photoelectric conversion efficiency of a prepared light conversion adhesive film is low are solved.

The invention discloses a multi-spectral-band compatible stealth coating based on a high-entropy alloy and a preparation method of the multi-spectral-band compatible stealth coating, and belongs to the technical field of functional high-entropy alloy coatings and preparation of the functional high-entropy alloy coatings. The problem that the visible light and infrared stealth effect of an existing stealth coating in a wide spectrum range is poor is solved. According to the preparation method, the high-entropy alloy film is prepared through the magnetron sputtering technology, efficient customization of material components and structures is achieved through scientific screening and optimal combination of elements and regulation and control of magnetron sputtering parameters, and therefore the high-entropy alloy film which is uniform, compact and excellent in performance is obtained. Test results show that the visible light band absorptivity of the high-entropy alloy coating is about 0.95, the infrared band emissivity of the high-entropy alloy coating is about 0.05, and multi-spectrum-band compatible stealth in the visible light and infrared spectrum range is achieved.

The invention provides a light broadband wave-absorbing structure based on 3D printing and a resistive film and a preparation method thereof.The light broadband wave-absorbing structure comprises a metal bottom layer, a supporting layer, a resistive film layer and a structural wave-absorbing material layer which are sequentially arranged from bottom to top, the structural wave-absorbing material layer is of a 3D printing structure and is made of CNTs doped with ABS, and the supporting layer is made of carbon nanotubes doped with ABS. Periodic units of the 3D printing structure are two kinds of regular hexagonal cylinder periodic units with different sizes. The CNTs-doped ABS 3D printing structure is introduced into the single-layer resistive film wave-absorbing structure, the 3D printing structure, the size and the resistance value of the resistive film are optimized, the wave-absorbing structure small in thickness and weight is obtained, meanwhile, the wave-absorbing structure has excellent wave-absorbing performance, and the reflection loss is smaller than-10 dB within 2.0 GHz to 18 GHz.

The invention discloses a morphology-controllable Ti3C2T x MXene / Co / C composite material, preparation method and application thereof, the present invention prepares Ti3C2T by hydrothermal carbonization method x MXene / Co / C absorbing material. Different amounts of NH3·H2O are added to the precursor mixed solution to adjust the pH of the solution, change the surface energy of different crystal faces, change the growth mode of the crystal to a certain extent, and calcine to synthesize single-substance Co magnetic nanomaterials of different dimensions. The present invention breaks the limitations of traditional preparation methods. In the prepared absorbing material, the dosage of NH3·H2O in the precursor mixed solution can adjust the reaction speed of the pH value of the reaction system, thereby changing the growth rate of different crystal faces, and finally synthesizing single-substance Co particles of different morphologies. Among them, the block structure, the cut-angle columnar structure, and the nanorod structure have a larger surface area, which increases the reflection and scattering of the incident electromagnetic wave, effectively prolongs the propagation path of the electromagnetic wave, and brings more interface charge polarization, thereby improving the loss performance of the electromagnetic wave.

The invention discloses flaky polypyrrole with adjustable conductivity, a preparation method and application of the flaky polypyrrole in the field of terahertz absorption. The method comprises the following steps: dispersing sodium myristoyl glutamate in absolute ethyl alcohol, stirring and uniformly dispersing by utilizing ultrasonic waves, injecting a pyrrole monomer into a sodium myristoyl glutamate solution, continuously stirring and ultrasonically dispersing, then adding a certain amount of deionized water, and continuously stirring under an ice bath condition; and adding an oxidizing agent, and stirring for reaction to obtain the conductive polypyrrole with the sheet structure. According to the preparation method, pyrrole polymerization is induced to form polypyrrole with a sheet structure by utilizing a chemical effect between the sodium myristoyl glutamate and a pyrrole monomer, and the sodium myristoyl glutamate plays a role of a seed template. The prepared flaky polypyrrole can obtain good conductivity and has an excellent terahertz wave absorption characteristic.

The invention relates to the technical field of manganese zinc ferrite and discloses a method for preparing a manganese zinc ferrite material. A composite material containing both a "conductive" element and a "magnetic" element is prepared by a physical mixing method. The manganese zinc ferrite has a large resistivity, and electromagnetic waves can easily enter the interior of the material to achieve electromagnetic impedance matching, so that the magnetic loss performance is outstanding; the polythiophene Schiff base conductive polymer can coordinate with metal ions to form a metal complex, thereby increasing the dielectric loss of the composite material and reducing the reflection of electromagnetic waves on the incident interface; the Schiff base structure transfers charges through the conjugation of single and double bonds, and the double bond electron rotation makes it magnetic, and the pinning effect of rare earth lanthanum increases the loss caused by domain wall resonance, thereby effectively improving the magnetic properties and wave absorption performance of the composite material, so that the prepared manganese zinc ferrite material has excellent properties of broadband and high conductivity.

The invention relates to the technical field of materials, discloses a preparation method and device of a visible-light-transparent metamaterial wave absorber, and solves the problems that an existing preparation method and device of the visible-light-transparent metamaterial wave absorber are narrow in wave absorbing bandwidth, poor in visible light transparency and difficult to achieve an infrared camouflage effect. The infrared stealth layer, the first PMMA layer, the microwave absorption layer, the second PMMA layer and the microwave reflection layer are combined and arranged by utilizing the visible light transparency characteristic of the indium tin oxide thin film and the polymethyl methacrylate or the polyvinyl chloride plate, the indium tin oxide with resistance loss is used as an absorbent, electromagnetic resonance loss is introduced, and meanwhile the resistance loss is increased; the adjustable resistance and patterning characteristics of the indium tin oxide are fully utilized, the duty ratio of the high-conductivity indium tin oxide thin film in the infrared stealth layer is improved, the infrared emissivity can be reduced, and the transparent indium tin oxide thin film with different surface resistivity is utilized to realize broadband strong absorption of visible light transparency and infrared disguise.

The invention relates to a photocuring initiator, a photosensitive composition and application. The photocuring initiator is a compound with a structure as shown in a formula (1): # imgabs0 #, wherein at least one of R1, R2 and R3 in the formula (1) is a C3-C25 nitrogen-containing aromatic group containing a benzene ring structure doped with 1-3 N atoms; 1-2 H groups in R1, R2 and R3 in the formula (1) are substituted by oxime ester groups shown in the formula (2): # imgabs1 #. Nitrogen-containing heterocyclic rings are introduced into a diphenylamine structure, so that the solubility is improved, and the problem of condensation caused by non-uniform dispersion is solved; the nitrogen-containing heterocyclic ring not only can be used as an electron donor to form an extended conjugated system with a carbazole ring, but also can enhance the pi-pi * transition capability of molecules, so that the absorption intensity is increased under a specific wavelength, and the sensitivity to light is improved. Therefore, the photoinitiator disclosed by the invention can show higher efficiency and performance in various applications, and can be widely applied to the industrial fields needing a photocuring technology, such as coatings, printing ink, adhesives, 3D printing materials and the like.

The invention provides a cobalt-doped nickel-zinc ferrite material and a preparation method and application thereof, the chemical general formula of the cobalt-doped nickel-zinc ferrite material is Ni < 0.5-x > Zn < 0.5-y > Co < x + y > Fe2O4, 0 < = x < = 0.4, 0 < = y < = 0.4, and 0 < x + y < = 0.4. According to the cobalt-doped nickel-zinc ferrite material disclosed by the invention, by doping cobalt, the material can better absorb incident electromagnetic waves, and the position of an absorption peak is changed, so that the wave-absorbing capacity of the nickel-zinc ferrite material in a high-frequency region is improved, and the wave-absorbing material is thin in thickness, wide in frequency band and high in absorption capacity.

The present invention discloses SiC@MnO 2‑x / Mn3O 4‑x Nanocomposite wave absorbing material and preparation method thereof. The present invention uses carbon cloth loaded with SiC nanowires as a substrate, uses a hydrothermal method to wrap a dense layer of MnO2 on the SiC nanowires, and then introduces oxygen vacancies by calcining in an argon atmosphere to induce the MnO2 wrapped on the SiC nanowires to form a dense layer of MnO2. 2‑x Phase transformation occurs to generate Mn3O 4‑x Finally, SiC@MnO 2‑x / Mn3O 4‑x Nanocomposite wave absorbing material. The experimental method adopted by the present invention is easy to operate, low in cost, easy to control, has many controllable variables, and can be repeated. 2‑x / Mn3O 4‑x The nanocomposite absorbing material has the advantages of good microwave absorption performance, thin matching thickness, wide effective absorption bandwidth and covering the entire Ku band. The present invention provides a good foundation for the development of composite material defect-induced polarization to promote electromagnetic wave absorption, and provides a good design idea for the multi-component composite of electromagnetic wave absorbing materials. Its good microwave absorption performance can play a good role in electromagnetic radiation and pollution of electronic equipment, and has broad application prospects.

The present application relates to a kind of multifunctional composite fabric with wave-absorbing, flame-retardant, ultraviolet absorption and a preparation method thereof.In the present application, by material intrinsic design and structure control, the synergistic technology of realizing wave-absorbing, flame-retardant, ultraviolet-resistant and other multiple functions integrated in fabric substrate under low filler addition amount is obtained.

The invention relates to the technical field of wave-absorbing materials, and provides a preparation method of different-quantity ion double-position modified barium ferrite wave-absorbing powder and a wave-absorbing coating and a corresponding product of the different-quantity ion double-position modified barium ferrite wave-absorbing powder and the wave-absorbing coating. Comprising the following steps: preparing a modified barium ferrite wave-absorbing powder precursor solution from an acetate composition, a nitrate composition, citrate, deionized water and an ammonium hydroxide solution; carrying out gelling treatment on the modified barium ferrite wave-absorbing powder precursor solution; carrying out drying treatment on a gelling product; carrying out combustion treatment on the prepared modified barium ferrite wave-absorbing powder precursor; carrying out first grinding treatment on a combustion product; and preparing the hetero-ion double-position modified barium ferrite wave-absorbing powder. The microstructure and the internal structure of the barium ferrite can be changed, the natural formant is adjustable, the excellent wave-absorbing efficiency is obtained, and the Curie temperature and the high-temperature stability are improved.

This invention belongs to the field of high-entropy ceramic materials technology, and discloses a perovskite ceramic material, its preparation method, and its application. The general chemical formula of the perovskite ceramic material of this invention is: (Ba y1 Sr y2 Ca y3 )Fe x O3, where x = 0.5–1.5, y1 = y2 = y3 = 0.2–0.4. The resulting perovskite-type ceramic material, when composited with paraffin at a mass ratio of 9:1 and a thickness of 1.2 mm, exhibits an absorption bandwidth of 4.16 GHz and a minimum reflection loss of -40.58 dB, demonstrating a wide effective absorption bandwidth and high absorption intensity even at low thicknesses. Furthermore, the material preparation method uses water as a solvent, eliminating the need for highly toxic chemical reagents, making it environmentally friendly and pollution-free. The preparation process is simple, low-cost, and suitable for large-scale industrial production.

The invention discloses a FeSiAl / MOFs-derived composite wave-absorbing material with dielectric frequency dispersion characteristic and a preparation method thereof, and the composite wave-absorbing material is prepared by the following steps: modifying flaky FeSiAl alloy powder with a bifunctional surface modifier, and coating the surface with graphene oxide (GO) to obtain modified FeSiAl with amido functional groups on the surface; the preparation method comprises the following steps: carrying out a heating reaction on the metal-organic framework ZIF-67 modified by polydopamine (PDA), and carrying out high-temperature pyrolysis to obtain the metal-organic framework ZIF-67 modified by polydopamine (PDA). The composite wave-absorbing material has efficient wide / low-frequency electromagnetic wave absorption characteristics.

The present invention provides a flaky Al2O3@SiC high thermal conductivity composite wave absorbing material and a preparation method thereof, the preparation method comprising the following steps: (1) Preparation of flaky Al2O3@SiO2: using tetraethyl orthosilicate as a silicon source to coat a layer of SiO2 on the surface of flaky Al2O3 to obtain a composite material of Al2O3@SiO2 having a flaky structure; (2) Preparation of flaky Al2O3@SiC: using sucrose as a carbon source, introducing Ar gas into a high temperature furnace containing flaky Al2O3@SiO2 for reaction, and reducing SiO2 by carbon to obtain a flaky Al2O3@SiC high thermal conductivity composite wave absorbing material. The present invention not only effectively improves the thermal conductivity of the composite material by coating a layer of SiC on the surface of flaky Al2O3, but also greatly increases the number of reflections and scatterings of incident electromagnetic waves in the material, effectively improves the absorption intensity, and improves the problem of low thermal conductivity of traditional wave absorbing agents.

The invention belongs to the field of wave-absorbing materials, and particularly relates to a hydrogel reinforced cement-based wave-absorbing material and a preparation method thereof.The upper layer and the lower layer of the hydrogel reinforced cement-based wave-absorbing material are wave-transparent layers, the middle layer of the hydrogel reinforced cement-based wave-absorbing material is made of wave-absorbing hydrogel, and each wave-transparent layer is composed of Portland cement, fly ash, a water reducing agent, an air entraining agent and dolomite stone; the wave-absorbing hydrogel is prepared from molybdenum carbide / seaweed carbon powder, a defoaming agent, sodium alginate, polyvinyl alcohol and water. The wave-absorbing material uses cement, fly ash and coarse aggregate as an electromagnetic wave-transparent layer framework material, so that a large amount of electromagnetic waves are allowed to penetrate through the interior of the material while the concrete strength is improved; a molybdenum carbide / seaweed carbon powder and hydrogel composition is used as an electromagnetic wave absorption layer to enhance the loss of electromagnetic waves in the material; the seaweed carbon further enhances the electromagnetic wave attenuation capability; the hydrogel not only is beneficial to dispersion of the wave-absorbing material and reduction of the clustering effect of the molybdenum carbide / seaweed carbon powder, but also can synergistically enhance the toughness and the wave-absorbing capacity of the concrete.

This invention discloses a dielectric-magnetic synergistic loss type electromagnetic wave absorbing material, its preparation method, and its application. The dielectric-magnetic synergistic loss type electromagnetic wave absorbing material of this invention comprises rGO aerogel and Ni distributed in the rGO aerogel. x Co 1‑x Fe2O4 magnetic nanoparticles x The range of values ​​for is 0≤ x ≤1. The preparation method of the dielectric-magnetic synergistic loss type electromagnetic wave absorbing material of the present invention includes the following steps: mixing graphene oxide and Ni x Co 1‑x Fe2O4 magnetic nanoparticles are dispersed in water, then subjected to a hydrothermal reaction, followed by freeze-drying. The dielectric-magnetic synergistic loss-type electromagnetic wave absorbing material of this invention possesses advantages such as low density, small matching thickness, wide absorption bandwidth, high absorption intensity, and flexible adjustment of composition and properties, making it a promising candidate for applications in radar stealth and electromagnetic protection.

The present invention relates to a Co / ZnO@PPy composite material and its preparation and application. Co / ZnO is obtained by convenient hydrothermal reaction-hydrogen argon reduction, presenting a micron solid column, with a longitudinal stripe on the surface, and then successfully constructing a micron-scale solid columnar Co / ZnO@PPy composite material by coating polypyrrole (PPy) by in-situ gas phase polymerization, and its surface presents a porous honeycomb structure. The 3D interwoven conductive network formed by its porous honeycomb structure provides good electron transmission, which helps to improve the dielectric loss capacity; in addition, the defect-rich ZnO has good contact with polypyrrole, which is conducive to interface polarization, multiple scattering and impedance matching. Compared with the prior art, the effective absorption bandwidth of the honeycomb solid column Co / ZnO@PPy composite material in the present invention can reach 5.4GHz, the maximum reflection loss is-57.4dB, and it shows excellent electromagnetic wave loss capacity in the frequency range of 2.0-18.0GHz.

The present invention discloses a method for preparing a broadband radar absorbing metamaterial, comprising: preparing a 3D printed material with electromagnetic absorbing function; testing the basic complex dielectric constant and complex magnetic permeability of the 3D printed material; designing absorbing layers with different sizes based on the basic complex dielectric constant and complex magnetic permeability based on a quarter-wavelength interference model to form a hollow unit structure; establishing a structural model of the radar absorbing metamaterial based on the hollow unit structure, and printing it using 3D printing technology to obtain a broadband radar absorbing metamaterial. The present invention uses a quarter-wavelength interference theoretical model, combined with the basic complex dielectric constant and complex magnetic permeability characteristics of the 3D printed material with absorbing function, to design a hollow unit structure with absorbing layers of different external sizes, effectively broadening the absorbing frequency band, providing a new idea for the design and preparation of broadband structural absorbing materials, and maximizing the application value of radar absorbing metamaterials.

The invention relates to an optical nonlinear operation device, an optical nonlinear operation assembly and a preparation method of a fluorescent material. The optical nonlinear arithmetic device comprises a fluorescent material layer and a reflecting layer, wherein the fluorescent material layer covers one side of a reflecting surface of the reflecting layer; the fluorescent material layer comprises a fluorescent material, the fluorescent material layer is used for absorbing part of incident laser emitted by the incident light source, and the service life of the fluorescent material is 1 nanosecond to 50 microseconds; the reflecting layer comprises a plane reflecting mirror and is used for reflecting the rest of incident laser emitted by the incident light source except for part of the incident laser. By adopting the device provided by the invention, the calculation effect of optical calculation can be improved.

The utility model discloses a segmented rapid scanning system using an external cavity quantum cascade laser, which belongs to the technical field of infrared spectrum rapid scanning and comprises a laser emission system, a control system, an ultrasonic injection system, a reference system, a calibration system and an information collection system. The control system is respectively connected with the laser emission system, the ultrasonic injection system and the information collection system, infrared light emitted by the laser emission system is divided into three paths through the beam splitter, the three paths of infrared light enter the ultrasonic injection system, the reference system and the calibration system respectively, and the ultrasonic injection system, the reference system and the calibration system are further connected with the information collection system. By adopting the structure, the system can work at room temperature by using the external cavity quantum cascade laser, the resolution ratio of a measured spectral line is improved, the astigmatism type multi-pass absorption cell is used, the mirror surface space can be utilized to the maximum extent, the absorption intensity of the spectral line is improved, scanning can be rapidly completed, and collection is convenient.

The application provides a magnetic metal powder / porous carbon composite material, a preparation method and application thereof. The preparation method comprises the following steps: step S1, performing surface oxidation reaction on a magnetic carbonyl metal powder to form pretreated metal powder; step S2, dissolving a copolymer PS n -b-PEO m in a first solvent, adding a mixed solution of ethanol and water into the first solvent to obtain a milk emulsion; step S3, adding the pretreated metal powder, pyrrole and FeCl3 into the milk emulsion to perform in-situ polymerization reaction, so as to form a precursor and obtain a precursor solution; step S4, removing the spherical PS n -b-PEO m micelles in the precursor by a solvothermal method, and then drying to obtain a porous precursor; and step S5, calcining the porous precursor under an inert atmosphere to obtain the magnetic metal powder / porous carbon composite material. The magnetic metal powder / porous carbon composite material prepared by the application has better wave absorption performance in a low frequency band.

The invention relates to the technical field of asphalt materials, and discloses a high-strength asphalt composite material and a preparation method thereof. According to the high-strength asphalt composite material prepared by the invention, the asphalt is used as a base material, and the waste rubber powder is added, so that the stability of the asphalt composite material is improved, and the production cost is reduced; due to the addition of the reinforcing filler, the aging resistance and durability of the matrix are improved; due to the addition of the modified polyimide fiber, the excellent mechanical property and waterproof property of the modified polyimide fiber can be exerted, and a reinforcing effect on a matrix is achieved. Therefore, the asphalt composite material disclosed by the invention has a good application prospect when being applied to the fields of road construction and the like.

The invention discloses a NiCo-MOF derived carbon nanotube wave-absorbing material with a core-shell structure and a preparation method of the NiCo-MOF derived carbon nanotube wave-absorbing material, and relates to the technical field of wave-absorbing materials. According to the method, NiCo-MOF with a core-shell structure is obtained by controlling the solvent proportion, then a carbon nano tube grows on the surface of the NiCo-MOF in situ, the prepared MOF-derived carbon nano tube has a hollow core-shell structure, and the surface of the MOF-derived carbon nano tube is covered with a layer of dense carbon nano tube. By adopting the structure, the conductivity of the material is greatly improved, the types of interface polarization are enriched, and good wave absorbing performance is shown in the frequency band of 2-18 GHz; the hollow structure is beneficial to multiple reflection of electromagnetic waves inside, and when the matching thickness is 2.5 mm, the effective absorption bandwidth can reach 5.7 GHz, and the minimum absorption peak reaches 4.8 GHz. The method is simple in technological process, low in cost and suitable for large-scale preparation, and has wide application prospects in the fields of light broadband wave absorption, thermal protection and the like.

The invention discloses a preparation method of a barium titanate doped corrosion-resistant high-entropy alloy composite wave-absorbing material, which comprises the following steps: step 1, mixing BaCO3 and TiO2, and carrying out ball milling and drying to obtain powder; 2, pre-sintering the powder to obtain a barium titanate green body; 3, the barium titanate green body is sequentially subjected to grinding, ball milling and drying, and barium titanate powder is obtained; fourthly, spherical high-entropy alloy powder is prepared and subjected to vacuum ball milling and drying treatment, and flaky high-entropy alloy powder is obtained; and fifthly, the barium titanate powder and the flaky high-entropy alloy powder are subjected to ball-milling mixing treatment, and the composite wave-absorbing material is obtained. According to the preparation method, the barium titanate material with the strong dielectric property is adopted and doped with the high-entropy alloy powder, the composite wave-absorbing material with the excellent wave-absorbing performance is obtained, and the composite wave-absorbing material is suitable for the field of wave-absorbing coatings in seawater and chemical industry extreme service environments.

This invention discloses a rare-earth co-doped TiO2 photocatalyst and its preparation method. The photocatalyst structure includes: a TiO2 crystal matrix, a rare-earth ion doped layer doped within the TiO2 crystal lattice, a transition control layer distributed in the middle region of the TiO2 crystal, a surface-active layer enriched on and near the surface of the TiO2, and a mesoporous structure formed within the TiO2. The rare-earth doped layer in the TiO2 is used to suppress photogenerated electron-hole recombination, the transition control layer is used to regulate carrier migration, the surface-active layer is used to enhance the adsorption and interfacial reaction capabilities of organic pollutants, and the mesoporous structure is used to improve the diffusion efficiency of pollutant molecules. Through a multi-layered synergistic structural design, this invention improves the utilization efficiency of photogenerated carriers while maintaining the ultraviolet photocatalytic ability of TiO2, significantly enhancing the degradation and deodorization performance of organic pollutants.

The invention relates to purple light excited cyan light fluorescent powder as well as a preparation method and application thereof. The cyan light emitting fluorescent powder belongs to an AO-Si3N4-Sb2O5-EuO system. Wherein A comprises one or more of Ca, Sr and Ba; the molar ratio of AO to Si3N4 to Sb2O5 to EuO in the purple light excited cyan light fluorescent powder is (0.9 to 0.95) to (0.57 to 0.66) to (0.005 to 0.1) to (0.025 to 0.1). The preparation method comprises the following steps: respectively weighing an A-containing compound, Si3N4, an Sb-containing oxide and an Eu-containing oxide as raw material powder, mixing, uniformly grinding, sintering in a reducing atmosphere, and cooling to room temperature to obtain the purple light excited cyan light fluorescent powder. Compared with the prior art, the blue light emitting fluorescent material can cover a wider emission spectrum range, and the urgent requirement of the current white light LED field on a blue light emitting fluorescent material is met.

The invention provides scintillation ceramic, a high-energy detection array, a detector and a preparation method. The chemical formula of the scintillation ceramic is Gd3Al2-x-yScxGa3O12: yCr < 3 + >. The preparation method comprises the following steps: S01, dissolving Gd2O3, Sc2O3, Ga2O3, NH4Al (SO4) 2.12 H2O and Cr (NO3) 3 in a hot acid solution, dropwise adding the acid solution into an alkali solution for coprecipitation, collecting a precipitate, and washing the precipitate; s02, drying and grinding the precipitate to obtain powder; s03, the powder is pre-sintered; s04, performing grinding, sieving, dry pressing and cold isostatic pressing treatment on the pre-sintered powder; and S05, carrying out primary sintering in an oxygen atmosphere, and carrying out isostatic pressing sintering in an inert atmosphere to obtain the compact ceramic. The garnet scintillation ceramic provided by the invention can realize high absorption intensity and luminous intensity of broadband, and shows good luminous performance and detection efficiency.