14 results about "Gadolinium oxide" patented technology

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.

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.

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.

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.

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 relates to the technical field of solid oxide electrolysis cells, and discloses an electrochemical reactor and a catalyst as well as a preparation method and application thereof. The electrochemical reactor comprises an anode, a cathode and an electrolyte layer arranged between the anode and the cathode, and is characterized in that the anode comprises an anode carrier, an anode catalyst and a binder, the cathode comprises a cathode carrier and a cathode catalyst, the main component of the anode carrier is gadolinium oxide doped cerium oxide, and the anode has a microchannel structure. The electrochemical reactor can be used for large-scale methane-to-ethane and methane-to-ethylene reactions, and the obtained ethane and ethylene products have high selectivity.

The present application relates to the technical field of electrocatalyst, in particular to a method for preparing a cobalt phthalocyanine / gadolinium oxide composite electrocatalyst by rapid Joule heat and application thereof, and its technical points are as follows: gadolinium source and organic ligand are dispersed in an organic solvent, carbon black is added, and after ultrasonic mixing and stirring, the precursor is obtained by drying; the precursor is subjected to rapid Joule heat treatment, and gadolinium oxide nanocrystals are grown in situ on the carbon black carrier to obtain a Gd2O3 / CB composite material; phthalocyanine cobalt and the Gd2O3 / CB composite material are subjected to liquid phase immersion treatment in a mixed solvent, so that the phthalocyanine cobalt molecules are anchored on the composite substrate, and after filtration and drying, the CoPc@Gd2O3 / CB catalyst is obtained; by constructing a strong electronic coupling composite structure of CoPc and Gd2O3 / CB in situ, the electronic transmission efficiency is significantly improved, the molecular aggregation is inhibited, and the COOH generation energy barrier is reduced, so that high current density and high CO Faraday efficiency are realized.

The application provides a high-temperature-resistant neutron and photon composite shielding material, raw material components of which are matched according to mass ratio, and the raw material components comprise 1-20wt% gadolinium oxide powder, 15-30wt% stainless steel powder and 50-80wt% tungsten carbide, and the material is formed by hot pressing or hot isostatic pressing method. The material provided by the application has good shielding capacity for thermal neutron, fast neutron, high-energy neutron and photon, and has the advantage of high-temperature resistance.

Glass compositions include titania (TiO2), lanthanum oxide (La2O3), boron oxide (B2O3), silica (SiO2) as essential components and may optionally include zirconia (ZrO2), niobia (Nb2O5), calcium oxide (CaO), barium oxide (BaO), yttria (Y2O3), zinc oxide (ZnO), gadolinium oxide (Gd2O3), gallia (Ga2O3), tungsten oxide (WO3) and other components. The glasses may be characterized by high refractive index at 587.56 nm at comparably low density at room temperature.

The present application relates to solid oxide cell, electrolytic cell technical field, disclose the composition with the function of activating methane and electrochemical reactor and application and the method for methane oxidation coupling, the composition includes component A, component B and component C;Wherein, the component A includes manganese oxide, tungsten oxygen acid alkali metal salt and optional cerium oxide;The component B includes yttria stabilized zirconia and / or gadolinium oxide doped ceria;The component C includes perovskite;The mass ratio of component A, component B and component C is 1:1-20:1-50.The electrode prepared by using the composition shows excellent electrochemical performance and methane oxidation coupling performance, which provides support for realizing efficient electrochemical conversion of methane.

The application discloses an organic-inorganic hybrid anti-radiation and heat insulation coating and a preparation method thereof, and relates to the technical field of coatings.The coating comprises, in percentage by mass, 25-45wt% of a film-forming base, 10-30wt% of silicon dioxide-coated gadolinium oxide composite particles, 3-15wt% of graphene oxide / mesoporous polydopamine / polyethylene glycol nano-filler, 2-10wt% of an additive, and the balance of deionized water; the film-forming base comprises a water-based polyurethane dispersion, a water-based epoxy emulsion and a water-based amine curing agent.The application also discloses a preparation method of the coating.The obtained coating has the advantages of heat insulation and buffering, anti-radiation, high adhesion, medium penetration resistance, water-based low VOC, sprayability, roll coatability and brush coatability, and can be used for medical protective boards, outer surfaces of industrial equipment and building protective components.

This invention relates to a reconfigurable gadolinium oxide memristor based on electrode engineering, its fabrication method, and a reservoir computing system. The reconfigurable gadolinium oxide memristor comprises a bottom electrode, a gadolinium oxide layer, and a top electrode stacked sequentially. In this invention, gadolinium oxide is used as the resistive switching material, which possesses both excellent ion migration capabilities and spontaneous relaxation characteristics. Therefore, a reconfigurable gadolinium oxide memristor with both volatile and non-volatile properties is developed based on electrode engineering to meet the functional requirements of the reservoir and readout layers in reservoir computing. In reservoir computing, the volatile Al / Gd₂O₃ / Pt memristor acts as the physical reservoir to achieve nonlinear mapping of the input signal; the non-volatile Ta / Gd₂O₃ / Pt memristor serves as the readout network, enabling parallel computation and identification, effectively solving the problems of slow data processing speed, poor real-time performance, and high integration difficulty in existing memristor-based reservoir computing systems.