26 results about "Complex oxide" patented technology

The present invention relates to a positive electrode active material, a method of preparing the same, a positive electrode, and a rechargeable lithium battery. The method for preparing the positive electrode active material can include: (i) adding an aluminum raw material and sodium hydroxide to an aqueous (e.g., water-soluble) solvent to prepare a coating solution having a pH range of 12.5 to 14; (ii) adding core particles including a lithium-nickel-based complex oxide to the coating solution to prepare a first mixed solution; (iii) adding a cobalt raw material to the first mixed solution to prepare a second mixed solution; and (iv) drying and heat-treating the second mixed solution to obtain the positive electrode active material.

This invention relates to an additive for thermal desorption of polycyclic aromatic hydrocarbon (PAH) contaminated soil and its preparation method. It utilizes a composite oxide of manganese, rare earth metals, and transition metals to oxidize PAHs into low-carbon molecules during thermal desorption, achieving efficient removal, lowering the thermal desorption temperature, and saving energy consumption. The lower thermal desorption temperature reduces the loss of organic matter in the soil, facilitating the secondary use of the treated soil. The prepared composite oxide has a hollow spherical structure, which promotes sufficient contact and rapid reaction between PAHs and the composite oxide. The doping of transition metal elements into the manganese oxide and cerium oxide lattices creates oxygen vacancy defects, further enhancing the catalytic oxidation performance. Loading the manganese, rare earth metal, and transition metal composite oxide onto the surface of Fe3O4 improves its dispersion. Utilizing the magnetic properties of Fe3O4, the additive can be separated from the soil after desorption treatment, allowing for recycling.

A spintronic device and an in-memory computing apparatus. The spintronic device comprises: a substrate; and a complex oxide layer and a magnetic tunnel junction structure, which are sequentially formed from bottom to top on the substrate, wherein there is a two-dimensional electron gas region at an interface of the complex oxide layer, and when a read / write voltage is applied to the spintronic device, a spin current generated by the magnetic tunnel junction structure tunnels into the two-dimensional electron gas region at the interface of the complex oxide layer, so as to change the density of a two-dimensional electron gas, such that the magnetic tunnel junction structure completes the reading or writing of data. Therefore, the effect of improving the reading reliability of the device is achieved.

Provided is a positive electrode active material, a positive electrode, or a secondary battery having high charge load characteristics. The positive electrode active material includes a lithium complex oxide having a layered rock-salt structure. The lithium complex oxide contains lithium, a metal element including at least one of cobalt and nickel, and potassium. A ratio of a substance amount of potassium contained in the lithium complex oxide to a substance amount of the metal element included in the lithium complex oxide is 0.0005 or more and 0.03 or less. In the lithium complex oxide, potassium is distributed so as to extend in a direction intersecting a <001> direction of the layered rock-salt structure.

The present invention relates to a process for the preparation of a catalyst composition comprising - a support comprising TiO2, - a composite oxide comprising vanadium and antimony, having a rutile structure different from VSbO4 and V 0.92 Sb 0.92 O4 as determined by X-ray diffraction (XRD) analysis using Cu Ka radiation and - optionally, one or more selected from silicon oxide, vanadium oxide and antimony oxide; said process comprising the steps of: (i) mixing vanadium / antimony oxide and optional silicon source with the support comprising TiO2 in a solvent to obtain a suspension; (ii) optionally, applying the suspension onto a substrate; (iii) drying at a temperature in the range of 80 to 250 °C; (iv) calcination at a temperature of 600 °C to 700 °C.

This invention relates to the field of advanced non-ferrous metal materials technology, and provides a copper-nickel alloy powder and its preparation method, comprising: using soluble copper salt and soluble nickel salt as reactants, preparing a copper-nickel composite hydroxide through a precipitation reaction; decomposing the copper-nickel composite hydroxide into a copper-nickel composite oxide; reducing the copper-nickel composite oxide in a protective atmosphere; and obtaining a copper-nickel alloy powder with a laser particle size of 125-489 nm and an oxygen content not exceeding 0.31 wt% after sieving. This invention can effectively control the dispersibility, particle linkage state, and particle size of the copper-nickel alloy powder, achieving controllable preparation across a broad spectrum to obtain copper-nickel alloy powders with different degrees of agglomeration, laser particle sizes, and excellent compositional control precision.

A waste gas purification catalyst has a substrate and a catalyst layer disposed on the substrate. The catalyst layer includes layer a, layer b, and layer c. Layer a is disposed upstream of the waste gas flow direction closer to layer b. Layer c is stacked with at least one of layers a and b. In the stacked portion of layer c with at least one of layers a and b, layer c is disposed further away from the substrate than at least one of layers a and b. Layer a contains Pd, layer b contains Pt, and the mass content C of Pd in ​​layer a is C. Pd The mass content C of Pt in layer b Pt The ratio, i.e., C Pd / C Pt The value is greater than 1. Layer c contains Rh, Ce-Zr composite oxide and Zr oxide, and in layer c, at least a portion of Rh is loaded onto Zr oxide.

This invention discloses a calcium-nickel-based composite material for photothermal fluidized beds, its preparation method, and its application. The calcium-nickel-based composite material uses components including a calcium source, a framework source, a photothermal catalyst source, and a pore-forming agent as raw materials. Its structure has a connected microporous network formed by the pyrolysis of the pore-forming agent and a composite inorganic metal oxide framework doped with metal elements. It is prepared by extrusion-spheronization and calcination-reduction-acidification processes. This invention constructs a highly connected pore network and a calcium-aluminum composite oxide framework inside the material through the synergistic doping of Al-Ni or Al-Co-Ni multi-metals. This material successfully overcomes the defects of traditional calcium-based particles, such as easy sintering and easy pulverization, and has excellent mechanical compressive strength, high full-spectrum absorption rate, excellent cycle stability, and efficient intrinsic catalysis and anti-carbon deposition ability, making it suitable for the large-scale, long-cycle operation requirements of photothermal fluidized bed conditions.

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 discloses a kind of nanometer coating modified ceramic membranes for oxygen-enriched combustion and a preparation method thereof, and belongs to the technical field of ceramic oxygen-permeable membrane.The ceramic membrane grows in situ a zinc-tin composite oxide nanostructure layer with specific stoichiometric ratio and micro-morphology on the surface of mixed conductor ceramic oxygen-permeable membrane matrix, significantly improving the oxygen permeability and high temperature stability.The three-dimensional "nanoflower" porous covering layer structure can effectively increase the oxygen permeation active sites, promote the surface exchange and bulk diffusion of oxygen ions.The perovskite oxide selected as the matrix has excellent oxygen ion and electron mixed conduction characteristics, providing a basis for high oxygen permeation flux.The preparation method precisely controls the steps of matrix membrane preparation, pretreatment, precursor preparation, in-situ hydrothermal growth and programmed temperature calcination, and cooperatively improves the high temperature oxygen permeation flux, CO2 corrosion resistance and long-term stability of the membrane, solving the problem that flux and stability are difficult to balance in the prior art.

The application belongs to the field of photocatalysis, and relates to a method and system for improving product selectivity of photocatalytic reduction of carbon dioxide. The method places a magnetic composite photocatalyst with a negative magnetic resistance effect in a reaction container, applies an external magnetic field to the reaction system under light conditions, uses the negative magnetic resistance effect of the magnetic photocatalyst under the action of the external magnetic field to promote the separation of photo-generated carriers, and improves the efficiency and product selectivity of photocatalytic reduction of carbon dioxide. The magnetic composite photocatalyst is preferably a MOF-derived carbon layer-wrapped nickel-iron composite oxide with a chemical composition of NiFe2O4 / Fe2O3@C, and has oxygen vacancies and heterojunctions. The application also discloses a system for realizing the above method, which comprises a reaction container, a light source, a magnetic composite photocatalyst and a magnetic field generating device. The application controls the behavior of photo-generated carriers through a magnetic field, effectively suppresses electron-hole recombination, and significantly improves the performance of photocatalytic reduction of CO2.

This invention discloses an antioxidant metal electrode material for electronic components and its preparation method in the field of electronic materials technology. The antioxidant metal electrode material comprises conductive metal powder, a reduced vanadium oxide-sulfide core-shell composite modifier, a yttrium-doped manganese-cobalt composite oxide interface stabilizer, an inorganic binder, and an organic carrier. This invention is prepared by mixing and dispersing the conductive metal powder with two inorganic modifying compounds and an inorganic binder in an organic carrier, followed by grinding and degassing. The reduced vanadium oxide-sulfide core-shell composite modifier can efficiently scavenge oxygen free radicals and form a strong coordination relationship with the metal matrix. The yttrium-doped manganese-cobalt composite oxide interface stabilizer can form a dense conductive protective layer on the surface of the metal particles. The synergistic effect of these two modifiers significantly improves the antioxidant performance and conductive stability of the electrode material.

This invention provides a solid waste-based asphalt modifier based on the synergistic effect of hierarchical pore adsorption and thermocatalytic oxidation, and its preparation method. The modifier, by mass parts, comprises the following raw material components: 45-75 parts of surface-modified ceramic polished brick powder; 4-10 parts of zeolite imidazole ester framework powder; 15-30 parts of alkali-activated geopolymer porous powder; 5-12 parts of transition metal-rare earth composite oxide catalyst; and 0.5-2.5 parts of silane coupling agent-modified graphene. This invention uses solid waste and carrier materials as main raw materials, constructing a hierarchical porous structure through multi-component composite construction. The preparation process is simple, convenient, and improves the level of solid waste resource utilization. The resulting asphalt modifier possesses a hierarchical pore adsorption network composed of interparticle pores and interconnected channels, which can adsorb and enrich volatile organic compounds (VOCs) in asphalt flue gas, causing low-concentration pollutants to form higher local concentrations within the material and around the catalytically active sites.

Provided is a complex oxide having high density and high lithium ion conductivity and low activation energy. The complex oxide has a chemical composition represented by Li4-xSr2-xLaxZrO6 (0≤x≤1.0) and belongs to a monoclinic space group P21 / n. The relative density of this complex oxide can be made to be 100%. The lithium ion conductivity of this complex oxide can be made to be 6.0×10−4 S / cm or more. This complex oxide is produced by melting at least a part of a raw material having a chemical composition represented by Li(4-x)ySr(2-x)zLaxZrO6 (0≤x≤1.0, 1<y and 1<z) to form a molten portion and moving the molten portion at a movement speed of 8 mm / h or faster.

This invention discloses an antireflective film and its preparation method. The antireflective film comprises a substrate layer, a first coating layer, a second coating layer, a third coating layer, and a fourth coating layer stacked sequentially. The fourth coating layer is made of any one of aluminum-doped silicon dioxide, boron-doped silicon dioxide, or hafnium-silicon composite oxide. The refractive index of the first coating layer is greater than that of the second and fourth coating layers. The refractive index of the third coating layer is greater than that of the second and fourth coating layers. This invention uses material doping modification (such as aluminum-doped silicon dioxide or boron-doped silicon dioxide) and high-performance composite materials (Hf-Si-O composite) to prepare the antireflective film, giving it low reflectivity, high transmittance, high weather resistance, and excellent mechanical properties.

The application discloses an impact-resistant and wear-resistant protective steel plate and a preparation method thereof, and belongs to the technical field of metal material protection and processing. The application is used for solving the technical problem that the impact resistance, wear resistance and fatigue resistance of the protective steel plate in the prior art need to be further improved. The impact-resistant and wear-resistant protective steel plate is composed of a steel plate base material and a coating material coated on the steel plate base material, wherein the coating material comprises the following components in parts by weight: 100 parts of polyurethane emulsion, 20-30 parts of composite oxide, 5-10 parts of modified nano boron nitride, 1-3 parts of modified carbon nanotube and 2-3 parts of functional additive. The polyurethane emulsion, the composite oxide, the modified nano boron nitride and the modified carbon nanotube prepared by the application have a synergistic effect, so that the impact resistance, wear resistance and fatigue resistance of the protective steel plate are further improved.

This invention belongs to the field of photocatalysis technology, and relates to a nickel-doped MOF-derived catalyst, its preparation method, and its application. The nickel-doped MOF-derived catalyst is a nickel-iron composite oxide encapsulated by a MOF-derived carbon layer, with a chemical composition of NiFe2O4 / Fe2O3@C, and possessing oxygen vacancies; NiFe2O4 / Fe2O3 exhibits a heterojunction. Oxygen vacancies play a crucial role in the photocatalytic reduction of CO2, significantly improving the catalyst's catalytic performance by promoting electron transfer and increasing catalytic active sites. Oxygen vacancies can also provide additional electronic states, lowering the electron migration energy barrier, enhancing the separation efficiency of photogenerated carriers, and simultaneously improving the chemical environment on the catalyst surface, promoting CO2 adsorption and reaction, thereby accelerating the reduction reaction and increasing the conversion rate of intermediate products.

The present application relates to the technical field of steelmaking continuous casting process, and particularly relates to a hot-rolled steel D-type inclusion control method and hot-rolled steel. The hot-rolled steel D-type inclusion control method converts traditional calcium-magnesium-aluminum-silicon complex oxides into high-melting-point magnesium-aluminum spinel through four-step cooperation of "aluminum deoxidization-high-alkali slag-vacuum aluminum control-magnesium modification", and makes the magnesium-aluminum spinel sufficiently float before solidification, so that the D-type inclusions are less than or equal to 0.5 level.

This invention relates to the field of copper alloy technology, and more particularly to a high-temperature wear-resistant copper alloy and its preparation method. This invention utilizes the infinite mutual solubility of Cu and Ni elements. An equiatomic ratio of Ni is added to Cu to form a Cu-Ni solid solution, achieving solid solution strengthening. Then, precipitation strengthening is achieved by introducing Al elements to form a Ni3Al precipitate phase with Ni elements in situ. Combined with the strengthening effects of Ti, Cr, Si, and B elements, a copper alloy with high hardness, strength, and excellent wear resistance at high temperatures is obtained. Due to the high thermodynamic stability of the Ni3Al phase, it is not prone to phase transformation or coarsening under high-temperature conditions. Therefore, the CuNiAlX alloy is not prone to softening at high temperatures and exhibits good mechanical load-bearing capacity during high-temperature friction. Simultaneously, the CuNiAlX alloy undergoes a tribochemical reaction during high-temperature friction, forming a composite oxide layer on the wear surface, which plays a role in reducing friction and resisting wear.

Provided is a method for producing positive electrode active material particles having a core-shell structure and excellent film thickness uniformity of a coating layer. The method for producing positive electrode active material particles is characterized by including, in the following order: a step (i) for mixing a specific alkoxide monomer and / or an oligomer thereof with an organic solvent to obtain a mixed solution 1; a step (ii) for mixing the mixed solution 1 with core particles formed of a composite oxide to obtain a mixed solution 2; and a step (iii) for adding a specific hydrolyzing agent to the mixed solution 2 to hydrolyze and dehydrate-condense the alkoxide monomer and / or oligomer and deposit the resultant on the surface of the core particles, thereby obtaining a mixed solution 3 in which positive electrode active material particles having a core–shell structure are dispersed, wherein, when the total amount of alkoxy groups contained in the specific alkoxide monomer in the mixed solution 2 is A (mol) and the total amount of water in the hydrolyzing agent in the mixed solution 3 is B (mol), A and B satisfy a specific relationship.

The application discloses a kind of porous environmental catalytic materials and its preparation method and application, the composite oxide of titanium dioxide and ferroferric oxide is carrier, cerium oxide is active component;With carrier mass as benchmark, the mass percentage content of active component is 5~10%.The catalytic material is environment-friendly, preparation process is simple, and can effectively reduce chlorobenzene thermal desorption temperature, and the product can be widely used in the field of soil organic pollutants thermal desorption.

A positive electrode active material for a nonaqueous electrolyte secondary battery contains: first lithium transition metal complex oxide particles in which, with respect to the total molar amount of elements other than Li and O, the molar ratio of Ni is 50 mol% or more, D50 exceeds 8 µm and is 30 µm or less, and (D90-D10) / D50 is 0.7 or more and 1.5 or less, and second lithium transition metal complex oxide particles in which, with respect to the total molar amount of elements other than Li and O, the molar ratio of Ni is 50 mol% or more, D50 exceeds 1 µm and is 6 µm or less, and D90-D10 is 6 µm or less. At least one of the first lithium transition metal complex oxide particles and the second lithium transition metal complex oxide particles contains at least one selected from the group consisting of Ca, Sr, B, Ti, and Nb.

The present invention relates to a method for manufacturing a coating material for a solid oxide fuel cell separator with excellent oxidation resistance. In one embodiment, the method for manufacturing the coating material for a solid oxide fuel cell separator comprises the steps of: preparing a mixed composition solution by dissolving a precursor mixture comprising a manganese precursor, a cobalt precursor, a copper precursor, and a lanthanide precursor, an acid, and ethylenediaminetetraacetic acid (EDTA) in a solvent; preparing a gel mixture by adjusting the pH of the mixed composition solution to 8.0 to 10.0 and heat-treating it at 150 to 200°C; and calcining the gel mixture; wherein the coating material comprises a composite oxide comprising a matrix comprising a manganese (Mn)-cobalt (Co) spinel oxide and a dopant doped into the matrix; and lanthanide (Ln)-manganese (Mn) perovskite oxide; wherein the dopant comprises copper (Cu) and lanthanide group elements, and the composite oxide and the lanthanide-manganese perovskite oxide each have a specific surface area (BET) of 5 to 30 m² / g.

The application discloses a La-Al composite oxide etching-resistant coating and a preparation method and application thereof, and the etching-resistant coating comprises a lanthanum oxide layer and an aluminum oxide layer formed by ALD, and the atomic fraction of La is 9-64%. The lanthanum oxide layer is deposited by taking tri(dimethylamino) lanthanum and ozone as precursors, and the aluminum oxide layer is deposited by taking trimethylaluminum and water as precursors; the lanthanum oxide layer and the aluminum oxide layer are alternately deposited on the surface of a substrate by ALD, the circulation ratio is 1:5-5:1, and the process is continued until the target thickness is reached. By optimizing the atomic ratio of La and Al in the coating and the interlayer composite structure, the problem that lanthanum oxide is easily reacted with water and CO2 in the air to generate hydroxylation and carbonation, thereby resulting in insufficient environmental stability, is solved, the obtained coating has excellent etching-resistant performance to fluorine-containing plasma and environmental stability, and the etching-resistant performance of the coating can be maintained well after exposure to water and CO2 environment.

A method for manufacturing a positive electrode active material, a positive electrode active material manufactured using the method, and a rechargeable lithium battery including the positive electrode active material are provided. The method includes: performing a first mixing process at a first shear rate to form a mixture of a lithium transition metal complex oxide and graphene; and performing a second mixing process on the mixture at a second shear rate, wherein the first mixing process and the second mixing process are performed using a mixer including a pressure head and a rotating chamber, and the second shear rate is greater than the first shear rate.

The present application relates to a positive electrode active material, a positive electrode, and a lithium secondary battery, in which lithium ion diffusion paths in a lithium complex oxide that constitutes a positive electrode active material are formed in a manner that points to a specific crystal plane, and in which electrochemical characteristics and stability are improved by increasing growth of the crystal plane to which the lithium ion diffusion paths point. The positive electrode active material of the present application includes a lithium complex oxide of a layered structure that can undergo intercalation / deintercalation of lithium ions, and a ratio of peak intensities attributed to (003) and (101) planes obtained in X-ray diffraction analysis using CuKα rays on the lithium complex oxide satisfies formula 3: 0.379 ≤ I(101) / I(003) ≤ 0.421, and the lithium complex oxide is represented by chemical formula 1.