27 results about "Co element" patented technology

The application belongs to the technical field of gas sensing material preparation, and discloses an Ag / AgCl modified Co3O4 nano-composite material, a preparation method and application, and comprises the following steps: dissolving inorganic compounds of Ag elements and inorganic compounds of Co elements in deionized water, adding a proper amount of NaCl solution first, then adding N2H4.H2O solution, and obtaining Ag / AgCl loaded alpha-Co(OH)2 nanosheet material by using coprecipitation and in-situ reduction method; and drying and sintering the Ag / AgCl loaded alpha-Co(OH)2 nanosheet material to obtain the Ag / AgCl modified Co3O4 nano-composite material. The application provides a preparation method of a low-temperature high-response gas sensing material, the prepared Ag / AgCl loaded Co3O4 material has higher ethanol gas response performance, can significantly reduce the optimal working temperature of the sensing material, has potential application prospect, and can be used for monitoring alcohol pollutant gases in atmospheric environment, chemical plant environment, home environment and the like.

A positive electrode active material, a preparation method thereof, a secondary battery, and an electric apparatus. The positive electrode active material includes a matrix and a coating layer at least partially covering the matrix. The positive electrode active material satisfies: W1>W2, where W1 is a mass content of Co element in the coating layer, and W2 is a mass content of Co element in the matrix, both based on a mass of the positive electrode active material.

The application relates to a feed for metal injection molding, a preparation method of the feed and a metal product, wherein the preparation method of the feed comprises the following steps: S1, obtaining the following components according to weight parts: 40-50 parts of Fe elements, 2-8 parts of Ni elements, 20-25 parts of Cr elements, 20-25 parts of Co elements, 2-8 parts of Mo elements, 2-8 parts of Cu elements, 0.1-3 parts of Si elements, 1-3 parts of Mn elements, mixing and then heating to melt the material, and then adopting a high-pressure water-gas combined atomization method to obtain mixed powder; S2, obtaining a forming agent; S3, preheating the mixed powder obtained in S1 under vacuum conditions, then adding the forming agent into the mixed powder for mixing, and then performing plasticizing extrusion granulation to prepare the feed. The feed can meet the size precision requirements of MIM injection, green compact degreasing sintering and related post-process machining, the existing MIM materials on the market cannot simultaneously meet the problem of high polishable hardness, and the obtained metal product has the comprehensive advantages of appearance and hardness.

The invention discloses copper alloy powder and a method for conducting printing repair on an aluminum bronze workpiece through the copper alloy powder, and belongs to the technical field of alloys and repair of the alloys. The alloy comprises 25-32% of Ni, 12-17% of Co, less than or equal to 1.8% of Mn and less than or equal to 2% of Si. O is less than or equal to 0.03%, and the balance is Cu. By preferably increasing the contents of Ni and Co elements, the wear resistance of the repaired surface and the bonding performance between the matrix and the additive repair layer are improved while the safety in the large-batch preparation and use process of the powder is ensured. The proportion of nickel and cobalt in the alloy is increased, the strength and hardness of the copper alloy can be improved, the nickel and the cobalt hinder dislocation movement in metal lattices through different micromechanisms, in other words, the nickel plays a role through solid solution strengthening, and the cobalt plays a role through precipitation strengthening.

This invention discloses a carbon nanotube / ZIF-67 derived Co-C / CNT catalytic membrane, its preparation method, and its application. The method involves acidifying carbon nanotubes to immobilize the growth of ZIF-67 on the carbon nanotubes. ZIF-67 serves as the Co source. The carbon nanotube / ZIF-67 composite material is first acidified, then ground with a eutectic mixture, and finally carbonized. This effectively inhibits the aggregation of Co elements in ZIF-67 during pyrolysis, achieving high dispersion of metal active sites while preventing metal ion leaching. This improves the catalytic activity of the Co-C / CNT catalytic membrane, achieving highly efficient PMS activation, effectively inhibiting the loss of Co active components, and preventing Co degradation. 2+ The problem of secondary heavy metal pollution caused by leaching.

The invention discloses a Ce-doped Co-MOF derived CuO composite oxide catalyst and a preparation method thereof, and belongs to the technical field of catalytic materials. The preparation method comprises the following steps that S1, rare earth waste residues containing Ce elements and Co elements are obtained and treated, and a cerium salt solution and a cobalt salt solution are obtained; s2, the cerium salt solution and the cobalt salt solution are mixed with an organic ligand, and a Ce-Co-MOF precursor is prepared; s3, carrying out calcining and annealing treatment to obtain a Ce-Co-O porous composite oxide carrier; s4, preparing a copper salt solution, impregnating the Ce-Co-O porous composite oxide carrier with the copper salt solution, and then performing drying and calcining treatment to obtain a CuO-coated Ce-Co-O composite oxide; and S5, carrying out surface plasma activation treatment to obtain the Ce-doped Co-MOF derived CuO composite oxide catalyst. According to the invention, high-valued utilization of rare earth resources and precise structural regulation and control of catalytic materials can be realized, and the prepared catalyst can show excellent activity and stability in low-temperature CO oxidation reaction.

Embodiments of the present application provide a martensitic steel and a preparation method therefor, a structural member, and a terminal device. The martensitic steel provided in the embodiments of the present application comprises the Ni element, the Co element, the Mo element, the Nb element, the C element, the Fe element and other trace elements; on the basis of the total mass of the martensitic steel, the mass fraction of the Ni element is 14%-16%, the mass fraction of the Co element is 16%-18%, the mass fraction of the Mo element is 7%-10%, the mass fraction of the Nb element is 0.1%-0.6%, and the mass fraction of the C element is 0.003%-0.1%. On the basis of the element selection of the martensitic steel and the design of the content of each element, the martensitic steel can be prepared by means of a powder molding process such as metal injection molding, and the martensitic steel prepared by means of the described process can have high strength, good toughness, and a preset shape.

The invention provides a high-strength and high-conductivity copper-nickel-titanium-cobalt alloy and a short-process preparation method thereof, and belongs to the technical field of copper-based alloys. The alloy comprises the following components: 2.5%-3.5% of Ni; 0.8% to 1.2% of Ti; 0.3%-0.7% of Co; and the balance of Cu and inevitable impurities. The preparation method comprises the following steps: smelting and casting according to alloy components to obtain a cast ingot; and the cast ingot is sequentially subjected to homogenization treatment, hot rolling, cold rolling and aging treatment, the alloy is obtained, and the solid solution treatment step is omitted. Through microalloying of Co element, precipitation of a nanoscale strengthening phase (Ni, Co) 3Ti is promoted, and formation of an unfavorable phase is inhibited; and meanwhile, a short-flow process without solid solution treatment is adopted, and aging precipitation is directly driven by strain energy introduced by hot rolling and cold rolling. The alloy prepared by the method has high strength, high conductivity and good plasticity, is short in process flow and low in energy consumption, and is particularly suitable for the fields of lead frames in the field of electronic appliances and the like.

The application provides a high-speed steel and a preparation method thereof, and the chemical components of the high-speed steel include the following in percentage by mass: C: 0.86-0.90%, Si: 0.20-0.45%, Mn: 0.20-0.40%, Cr: 7.00-7.50%, W: 5.00-5.50%, Mo: 1.70-2.20%, V: 1.50-1.90%, Co: 0.50-2.00%, and the balance is Fe and impurities. The high-speed steel is designed through alloy components, and through the organic cooperation of W+Mo, the Co element is added to improve the quenching property of heat treatment, the design principle of multi-element compound, and the mechanism of the precipitation and growth of different element carbides in the solidification process, so that the steel has excellent high wear resistance and high corrosion resistance.

The application discloses a Ce-doped Co-MOF derived CuO composite oxide catalyst and a preparation method thereof, and belongs to the technical field of catalytic materials. The preparation method comprises the following steps: S1, obtaining rare earth waste residue containing Ce elements and Co elements, and processing the rare earth waste residue to obtain a cerium salt solution and a cobalt salt solution; S2, mixing the cerium salt solution and the cobalt salt solution with an organic ligand to prepare a Ce-Co-MOF precursor; S3, performing calcination and annealing treatment to obtain a Ce-Co-O porous composite oxide carrier; S4, preparing a copper salt solution, impregnating the Ce-Co-O porous composite oxide carrier with the copper salt solution, and then performing drying and calcination treatment to obtain a CuO@Ce-Co-O composite oxide; and S5, performing surface plasmon activation treatment to obtain the Ce-doped Co-MOF derived CuO composite oxide catalyst. The application can realize high-value utilization of rare earth resources and precise structure regulation of catalytic materials, and the prepared catalyst can exhibit excellent activity and stability in a low-temperature CO oxidation reaction.

The invention relates to a high-strength and high-plasticity easily-processed nickel-cobalt-based wrought superalloy and a preparation method thereof. The alloy comprises 18%-25% of Co, 11%-16% of Cr, 2.4%-3.4% of Al, 4.5%-6.5% of Ti, 0.8%-2% of W, 1.6%-3.2% of Mo, 0.5%-1.5% of Ta, 0%-1.5% of Nb, 0.001%-0.1% of C, 0.001%-0.05% of B, 0.001%-0.1% of Zr, 0-0.1% of Hf and the balance Ni, and the mass percent ratio of Al to Ti is smaller than or equal to 0.6. The sum of the mass percentages of W and Mo is 3-5%; the sum of the mass percentages of Nb and Ta is 0-2%; the ratio of the mass percent of the Co element to the mass percent of W + Mo is greater than or equal to 4; the ratio of the mass percent of the Al element to the mass percent of Nb + Ta is larger than or equal to 2, and the volume fraction of a gamma'strengthening phase of the high-temperature alloy is 40%-60%. The alloy element distribution in the gamma phase and the gamma'phase is adjusted through the reasonable element proportion, on one hand, the alloy has a large machining interval while the high gamma 'phase volume fraction is kept, and on the other hand, the alloy stacking fault energy is adjusted to make full use of the strengthening effect of the interaction effect of surface defects on the alloy.

The present disclosure relates to a cathode active material, a method of preparing the same, and a lithium secondary battery including a cathode including the cathode active material, the cathode active material including: a transition metal (M) other than a Co element, includes at least one element of W, Mg and Ti, and further includes an S element, a preparation method thereof, and a lithium secondary battery including a cathode including the cathode active material.

The application discloses a preparation process of B-Zr doped cobalt-based alloy powder and coating, and the alloy powder is composed of the following components with mass percentage: 90-95% of Stellite6, 1-5% of B and 1-5% of Zr. By introducing appropriate amounts of B and Zr elements into the Stellite6 alloy powder, the Zr and B elements synergistically alleviate the brittle boride to inhibit cracks, and synergistically form fine and dispersed ZrB2 and other stable high-hardness phases, promote the refinement of the structure, improve the hardness of the coating, and prevent B from forming a continuous network of brittle phases. The addition of the B element can also generate intermetallic compounds with Co elements and Cr elements, which have high hardness and high wear resistance, so that the overall strengthening layer hardness is improved. The finally formed high-hardness strengthening layer has a thickness of more than 0.5 mm and no cracks are generated. The hardness of the strengthening layer is more than 1100 HV, and the hardness of the strengthening layer can be more than 2-4 times of the substrate.

The invention discloses a process for separating and purifying waste powder (hereinafter referred to as Co-containing waste powder) formed by mixing pure Co powder and other pure metal powder for additive manufacturing. According to the technology, through the four-step technology of electromagnetic separation coarse screening, centrifugal separation semi-fine screening, high-gradient magnetic separation fine screening and electrolytic refining, efficient recovery of the Co element in the Co-containing waste powder for additive manufacturing is achieved. In the coarse screening stage, non-magnetic metal powder is removed through dry type / wet type electromagnetic separation; in the semi-fine screening stage, other magnetic metal powder except Co-Ni is removed through variable-speed centrifugal separation; in the fine screening stage, Ni powder is separated and removed through high-gradient magnetic separation; and the high-purity Co element is obtained through electrolytic refining in the purification stage. The problem that the Co-containing waste powder is difficult to recycle in BJAM, SLM, DED and other additive manufacturing technologies is solved, the purity of the recycled Co element is larger than or equal to 95%, cost and resource waste are remarkably reduced, and the method is simple in process, low in cost and suitable for large-scale application.

This invention relates to the field of electrocatalytic materials technology, and discloses a Ni / Co co-doped Fe(OH)3 composite electrocatalytic material, its preparation method, and its application. The preparation method involves using Fe(NO3)3·9H2O as the iron precursor, and Ni(NO3)2·6H2O and Co(NO3)2·6H2O as Ni precursors, respectively. 2+ and Co 2+ The doping source was prepared into a mixed precursor solution; the cleaned conductive substrate was dried; then the conductive substrate was placed in the electrochemical reaction system for deposition, and after deposition, it was rinsed and dried. This invention, by introducing Ni and Co elements to synergistically regulate the electronic structure and surface properties of Fe(OH)3, improves the conductivity and active site density of the material, reduces the overpotential of the oxygen evolution reaction, and enhances the catalytic reaction kinetics, providing a new technical solution for developing high-performance non-noble metal electrocatalysts and reducing the cost of hydrogen production through water electrolysis.

This invention relates to the field of Fe-Ni alloy technology, and more particularly to an Fe-Ni alloy, its preparation method, and its applications. The chemical composition of the Fe-Ni alloy, by weight percentage, consists of the following elements: Ni: 30.0~35.0%, Co: 0.5~4.0%, Cu: 0.4~2.0%, Mn: 0.2~0.5%, Si: 0.2~0.5%, Ti: 0.1~0.3%, Ce: 0.01~0.1%, C: ≤0.05%, with the balance being Fe and other unavoidable impurities. By adjusting the content of Ni and Co elements, and through multi-element alloying design, as well as controlling subsequent processing techniques, a thermal expansion coefficient of 3~6×10⁻⁶ is obtained in the temperature range of -40℃ to 100℃. ‑6 / K is a Fe-Ni alloy with certain strength and lower production cost.

This invention discloses an alloy powder for laser additive repair of beryllium bronze and its additive repair method, belonging to the field of laser additive repair. The alloy powder composition is Ni 29-33%, Co 10-15%, Fe≤0.9%, Mn≤1.2%, O≤0.03%, with the balance being Cu. This invention optimizes the content of Ni and Co elements by increasing their content and eliminating Be elements, ensuring safety during large-scale powder preparation and use, while improving the wear resistance of the repaired surface and the bonding performance between the substrate and the additive repair layer. The repair process of this invention utilizes a small-diameter spot, high-energy-density laser additive repair to effectively reduce the heat-affected zone, minimize deformation, and improve repair quality. The method of this invention significantly reduces the repair cycle.

The invention relates to the field of catalysts, and discloses a manganese-cobalt composite catalyst and a preparation method and application thereof. The manganese-cobalt composite catalyst is snowflake-shaped and comprises a carrier and an active component loaded on the surface of the carrier, the carrier is Mn2O3, and the active component comprises CoMn2O4; in the manganese-cobalt composite catalyst, the content molar ratio of the Co element to the Mn element is (0.05-0.1): 1. The manganese-cobalt composite catalyst provided by the invention has high catalytic soot oxidation performance and excellent stability at low temperature, and the preparation method is simple and convenient in process and suitable for large-scale production.

The invention discloses a corrosion-resistant die-casting aluminum alloy as well as a preparation method and an anodic oxidation method thereof. The aluminum alloy comprises the following materials: less than or equal to 0.3 wt% of Si; fe < = 1.0 wt%; cu < = 0.5 wt%; mn is 1.5 to 2.0 wt%; 0.1 to 0.3 wt% of Mg; 2.5 to 4.5 wt% of Zn; ti is 0.05 to 0.15 wt%; cr is 0.5 to 1.5 wt%; 2.5 to 3.5 wt% of Co; the total content of the impurities is less than or equal to 0.25 wt%; the tensile strength of the aluminum alloy is larger than or equal to 200 MPa, the yield strength is larger than or equal to 110 MPa, and the ductility is larger than or equal to 10% According to the invention, Cr and Co elements are introduced in a manner of adding an intermediate alloy to form a plurality of complex intermetallic compound phases with high hardness and high thermal stability, the intermetallic compound phases have extremely high thermal stability, are not easy to coarsen or dissolve into an aluminum matrix at high temperature, and can still effectively pinning grain boundaries and sub-grain boundaries in a high-temperature environment, so that the grain boundaries and sub-grain boundaries are effectively pinned, and the grain boundaries and sub-grain boundaries are effectively pinned. And grain boundary slippage and dislocation climbing are prevented, so that the softening resistance and creep resistance of the alloy are greatly improved.

The application provides a positive electrode active material, a preparation method and application thereof. The positive electrode active material comprises ternary single crystal particles. The maximum size of the center of the ternary single crystal particles to the surface of the ternary single crystal particles is R. The ternary single crystal particles comprise a first part extending 10%R from the surface of the ternary single crystal particles to the center. The first part comprises a first site away from the center and a second site close to the center in the extending direction. The molar content W1 of Co elements in the first site is greater than the molar content W2 of Co elements in the second site based on the total amount of molar nickel-cobalt-manganese elements in each site, and W1-W2 is not less than 5%. The application realizes the synergistic improvement of the specific capacity and the cycle life of the positive electrode active material.

This invention provides a method for preparing a diamond coating on the surface of high-speed steel cutting tools and their products, belonging to the field of cutting tool surface coating modification technology. The method includes pretreatment of the high-speed steel substrate, low-temperature plasma carburizing, physical vapor deposition of a silicon transition layer on the substrate surface, and finally diamond coating deposition, resulting in an ultra-thin diamond coating on the cutting tool surface. This invention employs an integrated modification scheme of carburizing pretreatment and a composite silicon transition layer. First, carburizing forms a dense carbide barrier structure on the surface of the high-speed steel, inhibiting the diffusion of Fe and Co elements in the substrate and strengthening the surface mechanical properties. Then, silicon is used as a transition layer to achieve lattice adaptation and stress buffering, thereby inhibiting graphite phase formation, reducing internal stress in the coating, and significantly improving the bonding strength and coating uniformity between the subsequent diamond coating and the high-speed steel substrate.

The application belongs to the field of casting component design and preparation, discloses a kind of synergistic toughening of nickel-cobalt alloy and preparation using trace element interaction, and the nickel-cobalt alloy is Ni 50‑x Co 50‑x Ti x C x Wherein, x is 0.3-0.7;In the nickel-cobalt alloy, the atomic percentage of Ni element and Co element is (50-x) %, and the atomic percentage of Ti element and C element is x %;By introducing Ti element and C element, the strength and toughness of nickel-cobalt alloy can be improved simultaneously.The application selects Ti and C element with suitable interaction strength, controls the content of solute elements Ti and C, so that it produces obvious element segregation characteristics during alloy solidification, forms element cluster without forming other phases, that is, in the case of still maintaining single-phase structure, the purpose of simultaneously improving the strength and toughness of alloy is achieved, which is especially suitable for toughening nickel-cobalt alloy castings.

This invention provides an AB2-type hydrogen storage alloy, its preparation method, and its application, specifically relating to the field of hydrogen storage alloy technology. This AB2-type hydrogen storage alloy has a C14-type Laves phase single-phase structure, with the general chemical formula (Ti). 1‑x Zr x ) 1.1 Mn 1.0 Cr 0.9‑y Ni y Co z Where: 0.10≤x≤0.20, 0.05≤y≤0.15, 0.02≤z≤0.06. The AB2 type hydrogen storage alloy provided by this invention, through the synergistic design of Ti-Zr synergistic regulation at the A site and Mn-Cr-Ni-Co multi-element fine-tuning at the B site, Zr partially replaces Ti to stabilize the single-phase C14 type Laves structure; the introduction of Ni significantly refines the grains and greatly shortens the hydrogen atom diffusion path; Co element enhances the lattice distortion tolerance and phase interface bonding force; while the optimization of the plateau slope by Cr improves the reversibility of hydrogen absorption / desorption and reduces hysteresis loss.

The invention discloses a flaky FeCoB alloy wave-absorbing material and a preparation method thereof, in the flaky FeCoB alloy wave-absorbing material, the molar percentage content of Fe element is 30-69%, the molar percentage content of Co element is 30-69%, the molar percentage content of B element is 1-10%, the sum of all the elements is 100%, the microstructure of the flaky FeCoB alloy wave-absorbing material is flaky particles, the particle size of the flaky particles is 3-50 [mu] m, and the thickness of the flaky particles is less than 1 [mu] m. The flaky FeCoB alloy wave-absorbing material provided by the invention has good absorption performance on electromagnetic waves in the frequency band of 2-8GHz under the condition of relatively small thickness, and the number of alloy principal elements is small, so that the production cost can be reduced, and the high magnetic loss capability of the alloy can be kept.

The invention relates to the technical field of energetic materials, and discloses a high-energy insensitive explosive-based active energetic material and a preparation method and application thereof.The high-energy insensitive explosive-based active energetic material is prepared from an explosive matrix, a composite active sensitizer and an energetic adhesive, the explosive matrix is formed by compounding HMX and TKX-50, the composite active sensitizer is a compound composed of Co-doped g-C3N4, rGO and ZIF-8, and the energetic adhesive is a mixture of an energetic binder and a binder. Wherein the doping amount of the Co element in the Co-doped g-C3N4 is 0.8%-1.5%, the energetic adhesive is glycidyl azide, and the Co-doped g-C3N4 is prepared through preparation of all the components, mixed ultrasonic treatment, polymerization reaction, spray drying and in-situ reduction. The high-energy insensitive explosive-based active energetic material disclosed by the invention has the characteristics of high energy and insensitivity, is excellent in mechanical strength and stability, can be widely applied to the fields of military industry, civil blasting and aerospace, and solves the problem that high energy and insensitivity of a traditional energetic material are difficult to consider at the same time.

The embodiment of the invention provides martensitic steel, a preparation method of the martensitic steel, a structural part and terminal equipment. The martensitic steel provided by the embodiment of the invention comprises a Ni element, a Co element, a Mo element, a Nb element, a C element, a Fe element and other trace elements. Wherein on the basis of the total mass of the martensitic steel, the mass ratio of the Ni element is 14%-16%, the mass ratio of the Co element is 16%-18%, the mass content of the Mo element is 7%-10%, the mass content of the Nb element is 0.1%-0.6%, and the mass content of the C element is 0.003%-0.1%. Based on the element selection and the content design of each element, the martensitic steel can be prepared by adopting a powder forming process such as metal injection molding, and the martensitic steel prepared by the process can have relatively high strength, relatively excellent toughness and a preset shape at the same time.

The application discloses a high-entropy alloy solder and a preparation method and application thereof, and belongs to the technical field of welding materials.The high-entropy alloy solder comprises the following components in percentage by mass: C 0.02-0.03%, Si 4-4.5%, Cr 30-33%, Ni 11-15%, B 3.2-3.5%, Co 24-27%, Fe 24-27%, Ti <=0.01%, Al <=0.01% and inevitable impurities.The solder is based on BNi2, that is, contains B and Si, mainly adds Co elements and adjusts the contents of Cr, Ni, Co and Fe, and thus effectively solves the problem that B and Si in the solder are easy to generate brittle substances in the brazing seam, thereby reducing the tensile strength of the brazing seam.