74 results about "Gadolinium oxide" patented technology

The invention relates to the technical field of thermal barrier coatings, in particular to a gadolinium oxide and aluminum oxide co-doped modified YSZ: Dy thermal barrier sensing coating material as well as a preparation method and application thereof. The invention provides a thermal barrier sensing coating material. The chemical composition of the thermal barrier sensing coating material is Y Gd Al < c > Zr < d > DeyOf, wherein a is equal to 0.01 to 0.04, b is equal to 0.15 to 0.35, c is equal to 0.40 to 0.60, d is equal to 0.35 to 0.70, e is equal to 0.01 to 0.02, and f is equal to 1.50 to 1.70. The temperature measurement upper limit of the thermal barrier sensing coating material is 1200 DEG C, and the average thermal expansion coefficient is increased by 18% at the room temperature of 1200 DEG C, so that the thermal shock resistance of the thermal barrier sensing coating is effectively improved, and the service life of the thermal barrier sensing coating is prolonged.

A composite electromagnetic wave-absorbing material and preparation method therefor are provided. The composite electromagnetic wave-absorbing material includes following raw materials: magnetite powder, nickel powder, copper powder, samarium oxide, gadolinium oxide, cerium oxide, carbon black powder, graphite powder, epoxy resin, barium titanate powder, antioxidant, curing agent, diluent and leveling agent. Ferrite wave-absorbing materials are used as matrixes to be compounded with nickel powder, copper powder, graphite powder, carbon black and barium titanate, and doped with mixed rare earth oxides through combination of samarium oxide, gadolinium oxide and cerium oxide to thereby obtain the composite electromagnetic wave-absorbing material which combines magnetic loss characteristics of magnetite powder, ferromagnetic behavior of nickel powder and conductivity of copper powder, helping to achieve good electromagnetic wave-absorbing performance. By introducing graphite powder, carbon black powder and barium titanate powder as fillers and doping rare earth, wave-absorbing characteristics of the composite electromagnetic wave-absorbing material are improved.

This invention discloses a composite rare earth oxide co-stabilized zirconia ceramic microsphere and its preparation method, belonging to the technical field of zirconia ceramic microspheres. The zirconia ceramic microspheres are prepared from 80-90 parts by mass of tetragonal zirconia (ZrO2) powder, 0.5-1 parts by mass of alumina (Al2O3) powder, 5-10 parts by mass of yttrium oxide (Y2O3) powder, and 5-10 parts by mass of composite rare earth oxide powder. This invention uses tetragonal zirconia as the base material, adds yttrium oxide (Y2O3) as a stabilizer, and further adds composite rare earth oxides ytterbium oxide (Yb2O3) and nano-gadolinium oxide (Gd2O3). Yb2O3 serves as the second stabilizer, while Gd2O3 enhances the ferroelastic toughening effect of the ceramic. The combined effect of the two rare earth oxides increases the strength of the zirconia ceramic microspheres.

The invention discloses a RuIr-Gd2O3 bimetallic catalyst, a preparation method thereof and application of the RuIr-Gd2O3 bimetallic catalyst in a reaction for preparing synthesis gas by catalyzing N2O methane oxide dry reforming. The RuIr-Gd2O3 bimetallic catalyst is prepared from a Gd2O3 carrier and a RuIr bimetallic nano-alloy loaded on the Gd2O3 carrier, and the RuIr-Gd2O3 bimetallic catalyst is prepared from the RuIr-Gd2O3 bimetallic nano-alloy. The preparation method comprises the following steps: mixing the Gd2O3 carrier with a solution containing a Ru precursor and an Ir precursor, carrying out a stirring reaction under ultraviolet irradiation, evaporating the solvent to dryness, drying, and roasting in a reducing atmosphere to obtain the RuIr-Gd2O3 bimetallic catalyst. According to the method, efficient activation of N2O, precise cracking of CH4 and selective oxidation of an intermediate are realized through oxygen species slow release, redox center separation and bimetal site coordination strategies, so that the catalyst has high conversion rate and high CO / H2 yield at low temperature, and shows huge potential of cooperatively utilizing greenhouse gases under mild conditions.

The present invention developed a composite having a novel structure containing, in a high content, a powder having a radiation-shielding function.　Provided is a composite having a radiation-shielding function and a method for producing the same. The composite comprises a preform made from a mixture containing a liquid silica-based binder and one or more radiation-shielding powders selected from gadolinium oxide, boron carbide, boron oxide, boron, barium sulfate, strontium oxide, tungsten, tungsten oxide, tungsten carbide, molybdenum, molybdenum oxide, iron powder, iron oxide powder, and ferrite powder, the radiation-shielding powder(s) being contained in the range from 3% to 85% in total. All of the voids in the preform are impregnated and filled with molten aluminum and solidification is allowed to occur to form a composite, or 25% or more of the voids in the preform are impregnated with a liquid organic / inorganic sealing agent and solidification is allowed to occur to form a composite. The liquid silica-based binder has properties that allow the preform to be formed at a temperature at which the radiation-shielding powder(s) does not decompose.

The invention relates to the technical field of polymer composite materials, and particularly discloses a nylon composite material with a gamma ray shielding effect and a preparation method of the nylon composite material. The nylon composite material with the gamma ray shielding effect comprises the following components in parts by weight: 70-100 parts of nylon; 15-30 parts of a radiation shielding filler; 0.5 to 1 part of an antioxidant; 0.5 to 1 part of a lubricant; the preparation raw material of the radiation shielding filler is selected from one or a mixture of more than one of gadolinium oxide, cerium oxide, lanthanum oxide, tungsten oxide and bismuth oxide. Researches show that the radiation shielding filler is added into the nylon, so that the prepared nylon composite material has a relatively good gamma ray shielding effect; the important application value is realized.

The invention provides a neodymium-iron-boron magnet, a preparation method thereof, a high-radiation-resistance bonded neodymium-iron-boron magnet and application. The neodymium-iron-boron magnet is of a core-shell structure. The core-shell structure comprises an inner core, an inner shielding layer and an outer protection layer, wherein the inner shielding layer and the outer protection layer sequentially cover the surface of the inner core. Wherein the inner core comprises a neodymium iron boron magnetic material, the inner shielding layer comprises gadolinium oxide, and the outer protection layer comprises boride. According to the method, efficient cascade shielding of high-energy particles such as neutrons and gamma rays is formed through the nuclear physical shielding principle (the neutron capture effect of the gadolinium element and the gamma ray scattering function of boron nitride), the radiation resistance of the magnet is greatly improved, and the prepared neodymium-iron-boron magnet has the advantages of light weight and low-temperature forming; and the synergistic improvement of high radiation resistance and excellent magnetic performance can be met at the same time. The high-radiation-resistance bonded neodymium-iron-boron magnet prepared based on the neodymium-iron-boron magnet can keep stable magnetic performance in an extreme environment with an accumulated radiation dose of more than 1MGy.

This invention relates to the field of shielding materials, and more particularly to a natural rubber-based ionizing radiation shielding material and its preparation method. The material comprises the following components: natural rubber: 60-80 parts; nano-boron carbide: 5-15 parts; nano-high-density metal powder: 15-23 parts; modified gadolinium oxide: 3-10 parts; plasticizer: 3-8 parts; vulcanizing agent: 1-3 parts; accelerator: 0.5-2 parts; antioxidant: 1-2 parts. This invention can effectively shield ionizing radiation while retaining the high elasticity and flexibility of natural rubber, and possesses good processing performance and low cost, thus meeting the diverse needs of different fields for ionizing radiation shielding materials.

To develop a composite of a new constitution containing a powder having a radiation shielding function in a high content.SOLUTION: Molten aluminum is impregnated and filled into all voids of a preform made of a mixture containing one or more kinds of radiation shielding powders selected from gadolinium oxide, boron carbide, boron oxide, boron, barium sulfate, strontium oxide, tungsten, tungsten oxide, tungsten carbide, molybdenum, molybdenum oxide, iron powder, iron oxide powder, and ferrite powder and a liquid silica-based binder, the mixture containing the radiation shielding powders in a range of 3 to 85% in total; In the composite body having the radiation shielding function and the method for manufacturing the same, a liquid organic-inorganic sealing agent is impregnated and solidified to form the composite body, and a liquid silica-based binder has characteristics capable of forming a preform at a temperature at which the radiation shielding powder is not decomposed.SELECTED DRAWING: None

A rare-earth-doped aluminum-based composite material for shielding spent nuclear fuel comprises, by weight percentage: gadolinium oxide 1 wt.%–10 wt.%, europium oxide 1 wt.%–10 wt.%, samarium oxide 1 wt.%–10 wt.%, dysprosium oxide 1 wt.%–10 wt.%, erbium oxide 1 wt.%–10 wt.%, with the remainder being 6063 aluminum alloy powder. This invention exhibits excellent neutron absorption capacity. The aluminum-based material maintains both low weight and high strength and ductility. Furthermore, the addition of rare-earth elements such as Gd, Eu, and Sm, which have high thermal neutron absorption cross-sections, significantly enhances the material's neutron absorption capacity. The introduction of rare-earth elements such as Gd, which react with neutrons in an (n,γ) reaction, effectively prevents the formation of numerous helium bubbles in the matrix, thus improving the material's practical service life.

The invention provides low-temperature high-density gadolinium oxide doped cerium oxide powder and a preparation method thereof, and belongs to the field of solid oxide fuel cells. The preparation method comprises the following steps: taking a soluble cerium source, a soluble gadolinium source, a soluble iron source and a soluble cobalt source as raw materials, adding a first surfactant, and preparing FeCo-GDC precursor powder through a sol-gel method or a coprecipitation method; adding a second surfactant into the precursor powder, and carrying out sanding dispersion, spray drying and calcination to obtain a FeCo-GDC powder crude product; and carrying out ball milling on the FeCo-GDC powder crude product, and drying to obtain the low-temperature high-density gadolinium oxide doped cerium oxide powder. According to the invention, the soluble iron source and the soluble cobalt source are also introduced into the raw materials, and the first surfactant and the second surfactant are introduced in the preparation process, so that the nanoscale GDC powder with uniform particle size distribution can be obtained, a compact GDC diffusion barrier layer is formed on a smooth electrolyte layer at 1100-1250 DEG C, and the long-term stability of the battery is improved.

This invention discloses a holmium ion-doped yttrium gadolinium oxide single-crystal optical fiber, its preparation method, and its applications, belonging to the field of laser materials and laser technology. The chemical formula of the single-crystal optical fiber is Ho. 3+ YGdO3, wherein the Ho ion doping concentration is 0.2-1.0 at.%, is a cubic C-type sesquioxide crystal structure with space group Ia-3. This crystal exhibits characteristic absorption peaks at wavelengths of 1100-1200 nm and Ho-derived absorption peaks at 2.80-2.90 μm. 3+ ion 5 I6→ 5 Broad-spectrum mid-infrared fluorescence emission with I7 level transition; this crystal possesses a wide gain bandwidth, a large emission cross section, and excellent thermal properties, making it less prone to thermal lensing and thermal depolarization under continuous or high-repetition-rate pumping of single-crystal fibers, thus ensuring high stability of laser output. It is particularly suitable for realizing broadband tunable and ultrafast mode-locked mid-infrared lasers, and has broad application prospects in laser surgery, environmental monitoring, remote sensing, and other fields.

The application belongs to the technical field of high-entropy materials, and discloses a composite ceramic of Cr2O3-coated high-entropy pyrochlore and a preparation method and application thereof. 0.2 Nd 0.2 Sm 0.2 Gd 0.2 Sc 0.2 )2Zr2O7, wherein x is 5-20 wt.%; the composite ceramic is prepared by the following steps: sintering lanthanum oxide, neodymium oxide, samarium oxide, gadolinium oxide and zirconium oxide at 1400-1700 DEG C to obtain high-entropy pyrochlore powder, stirring the high-entropy pyrochlore powder in a CrCl3 solution after ball milling, drying to obtain CrCl3-coated high-entropy pyrochlore powder, cold sintering the CrCl3-coated high-entropy pyrochlore powder at 200-400 DEG C and 200-500 MPa, then heat preservation at 800-900 DEG C, and then pressureless sintering at 1500-1700 DEG C. The composite ceramic has high density, excellent radiation resistance and leaching resistance, and can be applied in the field of nuclear waste solidification.

The invention relates to the technical field of biomedical materials, in particular to a gadolinium oxide-based nano preparation as well as a preparation method and application thereof. The preparation method of the preparation comprises the following steps: preparing gadolinium oxide nanoparticles through a hydrothermal method and amination modification, and dissolving the gadolinium oxide nanoparticles in deionized water to obtain a contrast agent solution; dropwise adding the nano-particles into a gold source solution under stirring at a certain temperature to obtain nano-particles with core-shell structures; and finally, slowly adding the synthesized dispersant solution of the water-soluble polymer into the core-shell nanoparticle solution to obtain a gadolinium oxide-based nano preparation solution. And performing post-treatment such as dialysis, freeze drying and the like to obtain the core-shell structure nanoparticles based on the gadolinium oxide nano preparation. The invention relates to a gadolinium oxide-based nano preparation for cancer diagnosis and treatment, gadolinium oxide is used as an MRI contrast agent, and a gold shell is grown on the periphery of the gadolinium oxide as a photo-thermal preparation; the hydrogel has the characteristics of good biocompatibility and the like, and has an important practical prospect in the field of preparation of diagnosis and treatment integrated medicines.

The invention discloses a yttrium hydride-based high-temperature-resistant neutron moderation shielding material containing gadolinium oxide / samarium oxide / europium oxide and a preparation method and application thereof, and belongs to the technical field of nuclear radiation shielding. The problems that existing pure yttrium hydride is weak in neutron absorbing and shielding capacity, prone to cracking and pulverization and the like are solved. The density of the shielding material is 4.36-4.62 g / cm < 3 >, and the mass proportions of the substances in the total amount of YH3, Sm2O3, Eu2O3 and Gd2O3 are as follows: YH3 is more than or equal to 99% and less than 100%, Gd2O3 is more than or equal to 0% and less than or equal to 1%, Sm2O3 is more than or equal to 0% and less than or equal to 1%, Eu2O3 is more than or equal to 0% and less than or equal to 1%, Gd2O3 + Sm2O3 + Eu2O3 is more than 0% and less than or equal to 1%, and Gd2O3 + Sm2O3 + Eu2O3 is more than 0% and less than or equal to 1%. The material can effectively absorb full-spectrum neutrons, has high density, low crack rate and low defect rate, is resistant to high temperature and excellent in shielding performance, adopts hydrogenation, nano-ball milling and pressing sintering preparation processes, and is suitable for a micro nuclear power reactor at the temperature of 900 DEG C or below.

This invention relates to the field of metal oxide technology, specifically to a highly dispersed nano-gadolinium oxide and its preparation method. The preparation method includes: activating surface sites through weak acid etching, pulsed ultrasonic depolymerization, and hydrothermal re-hydroxylation; adsorption using a polycarboxylic acid chelating agent; introducing hydrophobic chains and tertiary amine groups through sequential amidation; forming a strongly hydrated outer layer through beet alkalization; and finally, ultrafiltration desalting and concentration. The nano-gadolinium oxide dispersion obtained by this method has advantages such as narrow particle size distribution, low viscosity, good storage stability, and strong electrolyte resistance, making it suitable for high-end applications such as polishing slurries and coating precursors.

This invention provides a gas-phase method and apparatus for preparing high-purity nano-tin dioxide powder, comprising the following steps: a tin source is vaporized using mid-frequency plasma to form tin vapor; the tin vapor is reacted with oxygen in an oxidation growth zone, while simultaneously injecting gadolinium oxide nanoaggregate aerosol; and the reaction is carried out through the surface oxygen vacancies and Gd2+ of the gadolinium oxide nanoaggregates. 3+ The coordination adsorption of tin-oxygen species at specific sites induces heterogeneous nucleation, generating nano-sized tin dioxide particles. These nano-sized tin dioxide particles are then subjected to in-situ surface functionalization treatment at 20-60°C with ultraviolet light at wavelengths of 185 nm and 254 nm, followed by the introduction of ozone at a concentration of 10-100 ppm for a residence time of 60-120 s. The surface-functionalized nano-sized tin dioxide particles are collected using an electrostatic-assisted method and dried to obtain high-purity nano-tin dioxide powder. This invention refines grain size, optimizes particle dispersibility, and achieves efficient particle collection. The resulting powder possesses both ultra-fine particle size and high purity, meeting the application requirements of cutting-edge new materials.

A rare-earth-doped antiferromagnetic crystal is disclosed, designed to achieve long optical coherence times and enable coherent coupling between optical and magnon modes. The crystal includes a host lattice, such as gadolinium vanadate, gadolinium oxide, or gadolinium silicate, which is antiferromagnetic below a Néel temperature and is doped with a second rare-earth ion, such as erbium. By operating at cryogenic temperatures, electron spins in the host are magnetically ordered, providing a quiet magnetic environment that minimizes decoherence for the dopant ions. The system achieves long optical coherence times for the rare-earth dopant ions, supporting robust quantum memory and communication. Additionally, coherent coupling between the optical transitions of the dopant and magnon modes of the host enables efficient microwave-to-optical quantum transduction. Isotopic purification of the host and / or dopant ions can further reduce nuclear spin noise, enhancing coherence times.

This invention discloses a voltage-controlled subferromagnetic terahertz radiation source, comprising a sequentially deposited heavy metal layer, a subferromagnetic alloy layer, a heavy metal alloy layer, an oxide layer, and a conductive layer. The oxide layer is a gadolinium oxide layer, the subferromagnetic alloy layer is an iron-gadolinium alloy layer, the conductive layer serves as the upper electrode connected to the voltage source, and the heavy metal layer serves as the lower electrode grounded. This invention utilizes the hygroscopic property of the gadolinium oxide layer to achieve the ionization of water molecules into hydrogen ions, and achieves phase control of the terahertz wave generated by the subferromagnetic terahertz source by voltage-controlled hydrogen atom injection. The structure is simple, low-cost, and the controlled state is stable.

The invention discloses high-light-yield boron gadolinium silicate scintillation glass with a wide aluminum content range and a preparation method and application of the high-light-yield boron gadolinium silicate scintillation glass. The scintillation glass comprises a matrix and light-emitting central ions dispersed in the matrix, the boron-gadolinium silicate scintillation glass with the wide aluminum content range and the high light yield comprises a matrix and light-emitting central ions dispersed in the matrix, wherein the matrix comprises the following components in percentage by mass: 3-15% of silicon dioxide, 5-15% of silicon dioxide, 5-15% of silicon dioxide, and the balance of water. 4 to 11% of diboron trioxide; 50 to 70% of gadolinium oxide; 6-20% of gadolinium fluoride; 4-20% of aluminum oxide; 1-3% of gallium oxide; 2-5 parts of barium oxide; 0.5 to 1.5 percent of calcium oxide; the content of the luminescent central ions is 2-9%, and the sum of the proportions of the components is 100%. The gadolinium borosilicate scintillation glass is characterized in that gadolinium trioxide, silicon dioxide and diboron trioxide are used as main components, a large amount of aluminum oxide is added, so that the gadolinium borosilicate scintillation glass has high density, high light yield and high transmittance, and the preparation cost of the high-performance scintillation glass is remarkably reduced.

The application discloses a preparation method of ultra-small rare earth gadolinium oxide nanomaterials, and relates to the technical field of functional materials. The rare earth gadolinium oxide nanomaterials are prepared through three steps of preparing a rare earth salt precursor, synthesizing a reaction solution of gadolinium oxide nanomaterials and washing the gadolinium oxide nanomaterials. The particle size of the gadolinium oxide nanoparticles is controlled through a method of doping rare earth ions. The reaction conditions are easy to control, and the types of the rare earth ions can be selected according to actual conditions and requirements. The use amount of the surfactant is controlled to slightly agglomerate the gadolinium oxide nanoparticles. The application has the advantages of simple process operation, low equipment requirement, easy control of reaction conditions, good process repeatability, short synthesis period, and the synthesized nanomaterials have the characteristics of ultra-small particle size, uniform size distribution, good dispersibility, high yield and the like.

The invention discloses a low-dielectric-loss chip packaging glass substrate and a preparation method thereof, and relates to the technical field of glass manufacturing. The chip packaging glass substrate is prepared from the following raw materials: silicon dioxide, boric oxide, zirconium dioxide, germanium dioxide, aluminum oxide, gadolinium oxide, a composite fluxing component and a low-loss dielectric functional component, the composite fluxing component is prepared from the following raw materials: magnesium fluoride, lithium metaborate and strontium fluoride; the low-loss dielectric functional component is prepared from the following raw materials: silicon nitride, boron nitride micro powder and a coupling agent solution. The preparation method of the chip packaging glass substrate comprises the following steps: preparing the composite fluxing component, preparing the low-loss dielectric functional component, forming the glass substrate, and preparing the chip packaging glass substrate. The prepared chip packaging glass substrate is low in dielectric loss and excellent in mechanical property.

This invention discloses a composite nanomaterial, its preparation method, and its applications, belonging to the technical fields of nanoporous materials and biomedical materials. The composite nanomaterial comprises porous gadolinium oxide hollow nanospheres and zinc oxide nanoparticles dispersed and loaded on the surface and / or within the pores of the porous gadolinium oxide hollow nanospheres. Each porous gadolinium oxide hollow nanosphere includes a shell and cavities within the shell, the shell having a porous structure. This composite nanomaterial exhibits a high specific surface area and good structural stability. Its hollow structure significantly enhances drug loading capacity, while the porous shell structure increases the specific surface area and promotes material diffusion. The zinc oxide nanoparticles are uniformly dispersed within the pores of the gadolinium oxide hollow sphere shell, improving the material's functionality. Furthermore, this composite nanomaterial possesses both drug delivery capabilities and potential bioimaging capabilities, making it suitable as a drug delivery carrier for loading anti-tumor drugs and playing a role in tumor treatment.

The invention discloses a lightweight neutron shielding material and a manufacturing method thereof, and belongs to the field of nuclear power. A preparation method of the lightweight neutron shielding material comprises the following steps: by taking yttrium powder, gadolinium powder and boron powder as raw materials, carrying out pre-hydrogenation treatment on the yttrium powder and the gadolinium powder, then mixing with the boron powder, carrying out cold pressing to obtain a cold pressed blank, and finally sintering in a flowing hydrogen atmosphere to obtain the lightweight neutron shielding material, yttrium gadolinium hydride particles, gadolinium oxide particles and dispersed boron particles are dispersed in the matrix. The method can be used for effectively preparing the 100g-level lightweight neutron shielding material, the cracking risk of the material is reduced, and the method has good engineering application value.

This invention discloses a ternary composite oxide thin film, its preparation method, and a cover glass for space photovoltaics, belonging to the field of radiation-resistant materials technology. The ternary composite oxide thin film comprises cerium oxide (CeO2), hafnium oxide (HfO2), and gadolinium oxide (Gd2O3), with the general chemical formula Ce. x Hf y Gd z O2, where x = 0.2–0.5, y = 0.3–0.6, z = 0.1–0.3, and x + y + z = 1. This invention integrates five functions—radiation resistance, antigen oxygen self-repair, neutron shielding, UV cutoff, and interface passivation—in a single film layer through the synergistic effect of the CeO2–HfO2–Gd2O3 ternary composite oxide. This greatly simplifies the protective structure of the cover glass and reduces process complexity and cost.

The application provides a high thermal shock resistance arched ceramic coating part and a preparation method and an aero-engine, and relates to the technical field of ceramic coating. The high thermal shock resistance arched ceramic coating part comprises an arched alloy base material and an arched ceramic coating arranged on the surface of the arched alloy base material; the arched ceramic coating comprises a bottom layer, an intermediate layer and a surface layer which are sequentially arranged, and the bottom layer is adjacent to the arched alloy base material; the arched alloy base material comprises a nickel-based high-temperature alloy; the bottom layer comprises an MCrAlYHfSi alloy; the intermediate layer comprises nano-zirconium oxide and Y2O3; the surface layer comprises ytterbium oxide, gadolinium oxide and yttrium oxide modified zirconium oxide; the elastic modulus of the bottom layer, the intermediate layer and the surface layer is sequentially increased, and the thermal expansion coefficient is sequentially decreased. The arched structure design of the arched alloy base material and the arched ceramic coating is adopted, the stress distribution mode of the traditional plane coating is changed, the stress concentration is reduced, and the thermal shock resistance of the coating is enhanced.

The invention relates to the technical field of scintillation screens, in particular to a scintillation screen based on gadolinium gallium aluminum garnet scintillation single crystals and a preparation method of the scintillation screen. The scintillation screen comprises a substrate, a light reflecting layer, a gadolinium gallium aluminum garnet scintillator powder screen and a light emitting layer, an inner groove is formed in the upper surface of the reflective layer, and the gadolinium gallium aluminum garnet scintillator powder screen is arranged in the inner groove; the gadolinium-gallium-aluminum garnet scintillator powder screen is prepared by mixing gadolinium-gallium-aluminum garnet scintillation single crystal particles and an inorganic binder in proportion, sintering and then grinding and polishing. The problems that an existing needle-shaped cesium iodide scintillation screen is not resistant to irradiation, prone to deliquescence and poor in afterglow, a gadolinium oxysulfide ceramic scintillation screen is poor in resolution ratio and low in luminous efficiency, and a Ce: GAGG single crystal spliced scintillation screen has a dead zone are solved, the irradiation stability and environmental adaptability of the scintillation screen are remarkably improved, the service life of the scintillation screen is remarkably prolonged, meanwhile, the preparation process is flexible, and the cost is low. And high-performance scintillation screens with different shapes and sizes can be prepared.

The invention relates to the technical field of high-temperature alloy precision casting, and discloses a gas turbine blade high-temperature alloy casting method which comprises the following steps: sequentially carrying out lanthanum nitrate dip-coating pretreatment and ammonium carbonate curing treatment on the inner wall of a shell, and converting lanthanum nitrate into a lanthanum carbonate solid interface layer in situ; sequentially dip-coating lanthanum borate surface layer slurry and gadolinium oxide isolation layer slurry on the curing layer to complete shell preparation; dewaxing, sintering and curing the shell at high temperature; high-temperature alloy molten metal is poured into the shell, and metallurgical bonding is formed between the lanthanum borate surface layer and the surface of the casting; keeping the lanthanum borate active layer on the surface of the leaf after shelling; and oxalate-phosphate composite sealing treatment is carried out on pores in the surface layer of the blade. According to the method, integration of casting forming and CMAS-resistant protective layer forming is achieved, the protective layer and the blade base body are metallurgically bonded, the bonding strength is high, micropores in the surface layer of the blade are effectively sealed, and a CMAS permeation channel is blocked.

Disclosed is a neutron-absorbing composite material. The neutron-absorbing composite material comprises: an aluminum substrate; and reinforcing material powder dispersed in the aluminum substrate and having a boron carbide core and a gadolinium oxide shell covering the surface of the boron carbide core.

The application belongs to the technical field of target materials, and particularly discloses a tin oxide-based target material and a preparation method and application thereof.The preparation raw material of the tin oxide-based target material according to the application comprises, in terms of mass fraction, 91-95 parts of tin oxide, 1.5-3.5 parts of tantalum oxide, 1.5-3.5 parts of zinc oxide, 0.5-2 parts of tungsten oxide and 0.3-1.5 parts of gadolinium oxide, in addition to a binder and a plasticizer.The application further provides a preparation method and application of the tin oxide-based target material.The tin oxide-based target material provided by the application has high density and extremely low resistivity, with a density of greater than or equal to 6.5 g / m 3 and a resistivity of less than or equal to 1*10 ‑2 Ω*cm, and thus can be applied to DC power source magnetron sputtering coating.In addition, the tin oxide-based target material according to the application has the advantages of good light transmittance and low resistivity, can improve battery conversion efficiency, and can be applied to photovoltaic heterojunction cells and perovskite cells.