305 results about "Titanium zirconium" patented technology

The present disclosure relates to the technical field of sodium-ion batteries, and in particular to an iron-based polyphosphate-type sodium-ion battery positive electrode material, a preparation method therefor and a use thereof. An organic ferrous source, a sodium source, a phosphorus source and a dopant are mixed and then ground until D50 is less than 180 nm, so that the reactivity of the material is improved, a solid-phase reaction is facilitated, and doped high-valence metal elements such as vanadium, niobium, titanium, zirconium and tin can be better doped into lattices of the iron-based polyphosphate-type sodium-ion battery positive electrode material (NFPP), so as to replace the iron site to form lattice defects such as vacancies, thereby improving the ionic conductivity of the material, inhibiting generation of NaFePO4 impurity phase, and improving the capacity and cycling stability of the material.

Provided are a lithium manganese iron phosphate material and a preparation method therefor, a positive electrode sheet, and a lithium ion battery. The lithium manganese iron phosphate material comprises a core and a coating layer that coats the surface of the core. The chemical formula of the material of the core is LiaMnbFecMdPO4, wherein M comprises at least one element among magnesium, calcium, strontium, cobalt, titanium, zirconium, molybdenum, vanadium, niobium, nickel, scandium, chromium, copper, zinc, beryllium, lanthanum and aluminum. The coating layer is formed by sintering a carbon source, and the carbon coating layer comprises graphitized carbon.

The invention relates to the technical field of metal surface engineering, and discloses a laser cladding layer based on copper-magnesium-titanium-zirconium gradient design and a preparation method thereof.The preparation method comprises gradient structure design, a microstructure strengthening mechanism, a laser cladding process and thermal field control. By constructing a copper-magnesium-titanium component gradient transition structure and matching the thermal expansion coefficient difference between a matrix and a coating in real time, interface thermal stress accumulation can be dynamically inhibited, the crack defect caused by thermal expansion mismatch of a traditional cladding layer is avoided, ordered diffusion of elements at the interface is promoted through gradual change of gradient components, and the thermal conductivity of the cladding layer is improved. The metallurgical bonding reliability of the coating and a base body is improved, meanwhile, a stable coating is formed, the long-term service stability under the extreme working condition is guaranteed, a microstructure strengthening mechanism regulation and control means is adopted, the coating has a stable and effective protective barrier in a corrosive medium environment, and the problem of performance degradation caused by structure defects of a traditional cladding layer is solved.

The invention belongs to the technical field of ceramic materials, and relates to complex-phase high-entropy ceramic as well as a preparation method and application thereof. The technical problem that in the prior art, high-entropy ceramic cannot synchronously have high hardness and fracture toughness is solved. The invention provides a complex-phase high-entropy ceramic. The complex-phase high-entropy ceramic comprises a carbonitride phase and a single boride phase, the transition metal elements comprise titanium, zirconium, niobium, tantalum and hafnium; in the complex-phase high-entropy ceramic, calculated according to the volume content, 93Vol% is smaller than or equal to the carbonitride phase lt; 100 Vol%, 0 Vol% lt; and the single boride phase is less than or equal to 7Vol%. The complex-phase high-entropy ceramic has the advantages of uniform two-phase distribution, small grain size, high density, high hardness and high fracture toughness. The invention further provides a preparation method of the complex-phase high-entropy ceramic, a liquid-phase precursor method is combined with an in-situ hot pressing sintering method, the process is simple, and the production period is short. Meanwhile, the invention further provides application of the complex-phase high-entropy ceramic in material preparation in the fields of aerospace and mechanical engineering.

The invention discloses a deoxidizer for metal smelting and a preparation process thereof, and belongs to the technical field of steel for high-strength fasteners, and the deoxidizer comprises aluminum powder, silicon powder, titanium powder, zirconium powder and carbon-coated lanthanum nano powder in a mass ratio of (45-50): (20-25): (15-20): (8-12): (0.2-0.4). In a sol crystallization stage, lanthanum nitrate and a composite ligand form a directionally growing metal organic framework under the assistance of an external field, and a regular pore structure of the metal organic framework provides a nano-scale template for subsequent carbon coating, so that the decomposed organic ligand is gradually carbonized in a segmented heating process and forms a gradient structure; the low-temperature section promotes the carbon layer to be converted from an amorphous state to an ordered state so as to enhance the electron conduction capability, and the high-temperature section forms a through mesoporous network through external energy etching, so that excessive agglomeration of lanthanum nanoparticles is limited, and a controllable release channel is constructed. The preheating and pre-pressurizing process provides support for the nanostructure on the macroscopic scale, and the aluminum powder is softened through low-temperature plastic deformation to fill gaps of the titanium-zirconium powder, so that a compact initial blank structure is formed.

The invention discloses titanium zirconium oxide spraying powder, a titanium zirconium oxide target material and a preparation method of the titanium zirconium oxide spraying powder and the titanium zirconium oxide target material, and belongs to the technical field of plasma powder preparation. The titanium zirconium oxide spraying powder provided by the invention is prepared by the following steps: mixing zirconium oxide and titanium oxide according to a certain mass ratio, presintering, crushing, mixing the crushed titanium zirconium oxide and water according to a certain mass ratio, grinding, sintering in a vacuum environment or a hydrogen environment, crushing and screening after sintering, and thus obtaining the titanium zirconium oxide spraying powder. The prepared titanium zirconium oxide has a suitable apparent density range, excellent flowability and a relatively high spraying deposition rate. Meanwhile, no other metal powder or binder is added in the preparation process of the titanium zirconium oxide spraying powder provided by the invention, so that the preparation cost can be effectively reduced, and the production efficiency can be improved. Furthermore, when the titanium zirconium oxide spraying powder provided by the invention is used for preparing a titanium zirconium oxide target material, the obtained titanium zirconium oxide target material is high in density and low in resistivity.

The invention relates to the technical field of brake discs, in particular to a carbon-ceramic brake disc with a composite functional layer and a preparation method of the carbon-ceramic brake disc. The problems that a brake disc is insufficient in strength and poor in ablation resistance are solved. The preparation method comprises the following steps: carrying out low-temperature plasma treatment and silicon dioxide sol impregnation on carbon fibers, and inserting a graphene oxide film between woven layers, so as to obtain a carbon fiber preform; primary densification is carried out through pretreatment activation, low-temperature permeation and high-temperature permeation, and two graphitization treatments are combined; siliconizing is carried out through low-pressure permeation, high-pressure strengthening and laser cladding, and secondary densification is carried out through precursor impregnation and cracking; the titanium zirconium silicide-nano aluminum oxide composite layer generated through the embedding process forms a compact oxidation film at high temperature, and the silicon carbide nano crystal whiskers are subjected to chemical vapor deposition, so that the strength and ablation resistance of the prepared carbon ceramic brake disc are improved.

The invention discloses a high-temperature-resistant and corrosion-resistant aluminum alloy material and a preparation process thereof, and relates to the technical field of aluminum alloy materials. The high-temperature-resistant and corrosion-resistant aluminum alloy material is prepared by carrying out micro-arc oxidation treatment on aluminum alloy, carrying out plasma spraying on a corrosion-resistant spray coating and carrying out heat treatment. The aluminum alloy comprises the following raw material components in percentage by weight: 0.05%-0.15% of silicon, 0.1%-0.2% of iron, 1.2%-1.5% of copper, 0.7%-0.9% of manganese, 2.5%-3.8% of magnesium, 10.2%-12.4% of zinc, 0.02%-0.04% of titanium, 0.08%-0.15% of zirconium, 0.2%-0.4% of scandium, 0.5%-0.8% of silicon nitride whiskers, 0.5%-1% of an aluminum-coated graphene material and the balance of aluminum.

The invention belongs to the field of medical titanium alloy material processing, and particularly relates to a preparation method of a high-strength titanium-zirconium alloy wire. The Ti-Zr alloy comprises the following chemical components in percentage by mass: 13.5-16.5% of Zr, less than or equal to 0.10% of Fe, less than or equal to 0.10% of C, less than or equal to 0.015% of H, less than or equal to 0.6% of O, less than or equal to 0.05% of N and the balance of Ti. Firstly, a round bar blank with a certain size is obtained through the procedures of smelting, forging and drawing; and then a finished wire is prepared in the modes of temperature-controlled drawing, stress relief annealing and centerless grinding. By means of the method, the high-strength titanium-zirconium alloy wire with Rm larger than or equal to 950 MPa and A larger than or equal to 10% can be obtained, the problems that the implant material Ti-Zr alloy is low in strength and the like are solved, the high-strength titanium-zirconium alloy wire for dental products can be produced through the method, and qualified raw materials are provided for the dental implant products.

The invention provides a glass structural member and electronic equipment. The glass structural member comprises a glass substrate, and a first optical scratch-resistant laminated layer, a second optical scratch-resistant laminated layer and a first superhard layer which are sequentially laminated on one side of the glass substrate, the first optical scratch-resistant laminated layer is formed by alternately laminating two material layers with different refractive indexes, and the second optical scratch-resistant laminated layer is formed by laminating three material layers with different refractive indexes; and the first superhard layer is a diamond-like carbon doped with at least one element of silicon, aluminum, titanium, zirconium, molybdenum and nitrogen. The glass structural member has good scratch resistance and optical performance which is not greatly changed compared with a glass substrate, and can better meet the long-term use requirement of an electronic equipment shell.

The application provides a glass structure and an electronic device. The glass structure comprises a glass substrate and a first optical scratch-resistant layer, a second optical scratch-resistant layer and a first superhard layer which are sequentially stacked on one side of the glass substrate, the first optical scratch-resistant layer is formed by alternately stacking two layers of materials with different refractive indexes, the second optical scratch-resistant layer is formed by stacking three layers of materials with different refractive indexes, and the first superhard layer is a diamond-like layer doped with at least one element selected from silicon, aluminum, titanium, zirconium, molybdenum and nitrogen. The glass structure has good scratch resistance and optical properties which change little compared with the glass substrate, and can better meet the long-term use requirements of the electronic device shell.

The invention belongs to the technical field of laser cladding, and particularly relates to a titanium-zirconium alloy surface high-hardness corrosion-resistant laser cladding coating and a preparation method thereof.The preparation method comprises the steps that firstly, cladding materials are mixed; ti powder, Zr powder, Nb powder, Mo powder and elementary substance powder are put into a planetary ball mill according to the equal molar ratio, then the ball mill is started for powder mixing, and after powder mixing is finished, the powder is taken out and put into a vacuum drying box for vacuum drying storage; before cladding, the surface of a workpiece is pretreated according to the sequence of rough grinding, cleaning, flushing and scrubbing. According to the high-hardness corrosion-resistant laser cladding coating on the titanium-zirconium alloy surface and the preparation method, in the treatment process of a cladding material and a workpiece, the cladding material is subjected to ball-milling mixing treatment, so that elemental metal powder is mixed more uniformly, and the obtained laser cladding coating is more uniform in component, and the corrosion resistance of the coating is improved; and the prepared coating is subjected to heat treatment, so that the purpose of reducing cracks in the cladding layer is achieved.

The invention relates to the technical field of brazing materials, in particular to high-performance aluminum-based brazing filler metal and a preparation method thereof.The high-performance aluminum-based brazing filler metal comprises the following components of 5-15 wt% of silicon, 1-8 wt% of copper, 0.2-2 wt% of rare earth elements, 0.02-0.5 wt% of microelements, 0.3-3 wt% of nanometer reinforcing phases and the balance Al; the rare earth element is a composition of lanthanum, cerium and neodymium; the microelement is a composition of titanium, zirconium, boron and vanadium; the nano reinforced phase is a composition of nano aluminum oxide and nano silicon carbide; the preparation method comprises the steps of raw material preparation, composite smelting, melt-spinning and post-treatment. The aluminum-based brazing filler metal provided by the invention has excellent wettability, flowability, joint strength, thermal conductivity and corrosion resistance; the preparation method provided by the invention is relatively short in production period, energy-saving, consumption-reducing, stable, controllable, high in preparation efficiency and low in preparation cost, the market competitiveness of the material is favorably improved, and the large-scale requirement in the field of high-end precision manufacturing is met.

The invention relates to a method and a device for plating non-evaporable getter films in a high-length-diameter-ratio small-aperture pipeline in batches, the device comprises an upper cavity and a lower cavity, at least four groups of pipe assemblies communicating the upper cavity with the lower cavity are arranged between the upper cavity and the lower cavity, the pipe assemblies are uniformly arranged along the circumferential direction, and the upper cavity and the lower cavity are communicated with each other through the pipe assemblies. Each pipe assembly comprises an upper transition corrugated pipe, an electrode, an upper transition pipe, a pipeline to be coated, a lower transition pipe and a lower transition corrugated pipe which are sequentially communicated from top to bottom; an electrode threaded rod in the electrode is connected with the upper end of a titanium-zirconium-vanadium alloy target through a connector, the lower end of the titanium-zirconium-vanadium alloy target is an overhanging end, and the titanium-zirconium-vanadium alloy target sequentially penetrates through the upper transition pipe, the pipeline to be coated, the lower transition pipe and the lower transition corrugated pipe. And the solenoid is sleeved on the pipe assembly. According to the technical scheme, the quality and performance of the non-evaporable getter film are improved, and meanwhile the batch preparation efficiency is improved.

The invention discloses an aluminum alloy for four doors and two covers of a new energy automobile and a preparation method of the aluminum alloy, and relates to the technical field of aluminum alloys, and the aluminum alloy comprises the following chemical components in percentage by mass: less than or equal to 0.20% of silicon, less than or equal to 0.35% of iron, less than or equal to 0.15% of copper, 0.20-0.50% of manganese, 4.0-5.0% of magnesium, less than or equal to 0.10% of chromium, less than or equal to 0.25% of zinc, 0.10% of titanium, 0.30-0.45% of zirconium, less than or equal to 0.35% of rare earth components and the balance of aluminum. The preparation method comprises the working procedures of smelting, refining, degassing, casting, saw cutting, surface milling, heat treatment, rolling and the like. By adjusting the chemical components, the proportion and the preparation process, the prepared aluminum alloy has higher tensile strength, yield strength and elongation at break compared with an existing medium-strength 5182 alloy, and the mechanical property of an aluminum alloy material is remarkably improved; and the alloy also has the advantages of small density, high hardness, good corrosion resistance, good stamping performance, easiness in welding forming and the like, and the safety performance of the current lightweight new energy automobile and the protectiveness to people in the automobile can be greatly improved.

The invention provides a high-strength and high-plasticity matched titanium-zirconium-based alloy wire rich in multi-scale eutectoid compounds and a preparation method of the high-strength and high-plasticity matched titanium-zirconium-based alloy wire, and belongs to the technical field of titanium alloy materials. According to the method, a titanium-zirconium-based raw material containing eutectoid beta stable elements is adopted, and a cast ingot is prepared through vacuum consumable smelting; grains are refined and high dislocation density is introduced through staged phase change region hot working of beta-phase region cogging forging, beta-phase region first-heating-number rolling and alpha + beta two-phase region second-heating-number rolling; and after drawing and sizing, a horizontal electric straightening machine is used for rapidly and electrically heating to separate out a nanoscale eutectoid compound, solid solution water quenching is combined for inducing a submicron eutectoid compound, and finally a finished product is obtained through grinding and polishing. The tensile strength of the prepared wire is larger than or equal to 850 MPa, the ductility is larger than or equal to 15%, matching of high strength and plasticity is achieved, the process is continuous and controllable, batch production is adapted, and high-performance domestic raw materials are provided for oral implants.

The invention discloses a modified lithium titanate negative electrode material and a preparation method thereof, a negative electrode plate, a battery and an electric device, and belongs to the field of energy and the field of new materials. The preparation method of the modified lithium titanate negative electrode material comprises the following steps: carrying out first reaction on lithium salt and first glacial acetic acid in a first solvent to prepare a lithium acetate solution; zirconium salt and second glacial acetic acid are subjected to first mixing in a second solvent, and a zirconium salt solution is formed; performing second mixing on the lithium acetate solution and the zirconium salt solution to form a lithium-zirconium mixed solution; performing third mixing on the lithium-zirconium mixed solution and a titanium source to form lithium-titanium-zirconium sol; and drying and calcining the lithium-titanium-zirconium sol to form the modified lithium titanate negative electrode material. According to the preparation method, the zirconium element is adopted for doping, meanwhile, a homogeneous phase mixing reaction process is matched, and a high-energy grinding process is not needed, so that uniform mixing of the raw materials on the molecular level can be realized, the high-rate charge-discharge capacity and the first efficiency are improved, and the probability of gas production of the battery is reduced.

The invention discloses an LED (light-emitting diode) packaging adhesive material and a preparation method thereof, and the LED packaging adhesive material comprises the following components in parts by weight: 100 parts of silicone oil, 1-3 parts of catalyst and 0.1-1 part of inhibitor, the silicone oil contains titanium-zirconium-containing vinyl silicone oil, hydrogen-containing silicone oil and vinyl silicone oil in a weight ratio of 1: (5-12): (2-10). According to the LED packaging adhesive material synthesized by selecting the titanium-zirconium-containing vinyl silicone oil, the hydrogen-containing silicone oil and the vinyl silicone oil with specific types and dosages, phenyl, titanium, zirconium and alkyl in the LED packaging adhesive material are high in uniform distribution degree, a formed three-dimensional network structure is compact and stable, the LED packaging adhesive material has relatively high crosslinking density, and the service life of the LED packaging adhesive material is prolonged. And the high hardness of the LED packaging adhesive material can be improved. In addition, the LED packaging adhesive material provided by the invention has high refractive index and high light transmittance.

The invention belongs to the field of additive manufacturing of titanium alloys, relates to a 3D printing high-toughness titanium alloy and a preparation method thereof, and solves the problem of poor plasticity of the existing Ti-Zr alloy. The Ti-Zr-O high-toughness titanium alloy comprises the following chemical components in percentage by mass: less than or equal to 0.01% of C, 0.46-0.5% of O, 1-2% of Zr, less than or equal to 0.015% of H, less than or equal to 0.02% of N and the balance of Ti and inevitable impurities. According to the Ti-Zr-O high-toughness titanium alloy finally obtained through the method, the density reaches 99.8% or above, the tensile strength is larger than or equal to 1150 MPa, the yield strength is larger than or equal to 1050 MPa, and the ductility is larger than or equal to 21%. According to the Ti-Zr-O high-toughness titanium alloy, solid solution elements oxygen and zirconium serve as strengthening elements, common solid solution elements such as W, Mo and Nb are replaced, a Ti-Zr-O high-toughness titanium alloy product is prepared, the strength and plasticity of the Ti-Zr-O high-toughness titanium alloy product are remarkably superior to those of a traditional titanium-zirconium alloy product, the cost of the high-toughness titanium alloy is greatly reduced, and the Ti-Zr-O high-toughness titanium alloy is suitable for industrial production. The method can achieve the purposes of low cost and high performance, and is suitable for large-scale production.

The invention discloses a method for preparing a high-temperature-resistant and solvent-resistant polyamide reverse osmosis composite membrane by an inorganic-organic coupling modification technology. More specifically, an inorganic nano-material and an ester compound containing silicon, aluminum, titanium and zirconium are introduced into a polyamide composite film forming system, so that the polyamide composite film shows better high temperature resistance and solvent resistance than a pure polyamide composite film.

The invention relates to the technical field of ore separation, in particular to titanium-zirconium ore tailing check separation equipment and method.The titanium-zirconium ore tailing check separation equipment comprises a variable-diameter chute and a magnetic enrichment assembly, and the variable-diameter chute comprises a low-speed layer, a high-speed layer and a medium-speed layer which are sequentially connected from top to bottom; the magnetic enrichment assembly is arranged on the inner ring of the variable-diameter chute; tailing ore pulp spirally flows at a low speed when entering the low-speed layer, magnetic minerals in the tailing ore pulp are attracted to the inner edge to complete sufficient sedimentation, radial layering is conducted under the centrifugal force effect of high-speed spiral flowing when the tailing ore pulp enters the high-speed layer, and magnetic aggregates generated by the magnetic minerals are disintegrated by repulsive force at the moment; ilmenite and zirconite are fully separated to improve the grade, magnetic minerals are enriched towards the inner edge again while the flow speed is reduced after the ilmenite and the zirconite reach the medium-speed layer, the ilmenite with the enriched inner edge is prevented from being scoured for the second time, and therefore the recycling rate is improved; the problem that the tailing recycling rate is low due to the fact that the fine grain content of the tailings is high and the sorting difficulty is high is solved.

The invention relates to an aluminum-copper alloy wire suitable for electric arc additive manufacturing and a preparation method of the aluminum-copper alloy wire. The wire material comprises the following components in percentage by mass: 5.5 to 6.5 percent of copper Cu, 0.4 to 0.55 percent of manganese Mn, 0.02 percent of magnesium Mg, 0.1 percent of zinc Zn, 0.3 to 0.4 percent of vanadium V, 0.45 to 0.6 percent of titanium Ti, 0.3 to 0.45 percent of zirconium Zr, 0.08 to 0.16 percent of cerium Ce, 0.08 percent of iron Fe, 0.06 percent of silicon Si and the balance of aluminum Al or impurities. The high-quality aluminum-copper alloy wire is prepared through burdening, alloy smelting, semi-continuous casting, homogenization treatment, cast ingot surface machining treatment, hot extrusion drawing machining and the like of the raw materials according to the alloy component proportion, and after electric arc additive manufacturing and solid solution aging, the tensile strength of a sample is larger than 474 MPa, the yield strength is larger than 372 MPa, the ductility is larger than 15.5%, and the tensile strength of the sample is larger than 370 MPa. And no plastic anisotropy exists in the transverse and longitudinal directions.

A catalytic structure can comprise a catalyst and one or more radical scavengers. Each radical scavenger can comprise one or more nanoparticles. Each nanoparticle can be formed as an oxide or oxynitride and can comprise at least one metal selected from titanium (Ti), zirconium (Zr), hafnium (Hf), rutherfordium (Rf), vanadium (V), niobium (Nb), tantalum (Ta), and dubnium (Db). In some embodiments, the radical scavenger can be used in an oxygen reduction reaction, for example, to decompose hydrogen peroxide into water and oxygen. In some embodiments, the catalytic structure with radical scavengers can exhibit enhanced durability, for example, when incorporated into a proton-exchange membrane (PEM) fuel cell.

The invention discloses a superhard film layer and a preparation method thereof. The superhard film layer comprises a base layer; the wear-resistant layer is arranged at the top of the base layer and is used for enhancing scratch resistance and fatigue resistance; the silicon oxynitride layer is arranged at the top of the wear-resistant layer and is used for adjusting the hardness and structural compatibility between different film layers; the titanium and zirconium doped silicon nitride layer is arranged at the top of the silicon oxynitride layer; the hydrogen-containing gradient silicon oxynitride layer is arranged on the top of the titanium-zirconium-doped silicon nitride layer, titanium, zirconium and hydrogen elements are introduced into the film layer, and the gradient film layer design is adopted, so that the hardness, the wear resistance and the corrosion resistance of the film layer are remarkably improved. A hardness test shows that the hardness of the prepared super-hard film layer is remarkably improved compared with that of a traditional film layer, and the prepared super-hard film layer can effectively resist scraping and abrasion in daily use and improve the service life and imaging stability of a lens in practical application such as a camera lens.

According to the invention, rigid anthracene is introduced as a framework of bridged binuclear metal, a pyridylamino binuclear metal titanium-zirconium-hafnium catalyst is constructed, and the molecular weight of the obtained polymer can be effectively improved through the synergistic effect between the binuclear metal and the steric hindrance and electronic effect on the catalyst structure; the polyolefin elastomer (POE), the isotatic polypropylene (iPP) and the propenyl elastomer (PBE) are efficiently synthesized. The pyridylamino binuclear metal titanium-zirconium-hafnium catalyst has the advantages that synthesis is simple, raw materials are easy to obtain, and the product yield is high. In copolymerization of ethylene and alpha-olefin, the catalyst shows excellent activity (5.75 * 10 < 7 > g (POE). Mol <-1 > (M). H <-1 >) and alpha-olefin selectivity (the insertion rate reaches 16.2 mol%), and the polyolefin elastomer POE with excellent performance is prepared. In propylene polymerization, the regularity of the polypropylene chain segment can be effectively regulated and controlled by adjusting the steric hindrance and the electronic effect of the catalyst, and the regularity gt is prepared with high activity (3.84 * 10 < 7 > g (PP). Mol <-1 > (M). H <-1 >); and the polypropylene material with high stereoregularity is prepared from 80 mmmm% of polypropylene with high stereoregularity. In copolymerization of ethylene and propylene, an elastomer material which takes propylene as a main material, can regulate and control the ethylene content to be 5-50 wt% and has unique characteristics of a propylene-ethylene semi-crystalline copolymer is prepared. In addition, the pyridylamino binuclear metal titanium-zirconium-hafnium catalyst also shows excellent high-temperature resistance (higher than 160 DEG C), is suitable for high-temperature solution polymerization, and can be used for preparing high-performance polyolefin elastomers. Therefore, the invention has original innovation, and provides a new direction for the development of the field of polyolefin materials.

The invention discloses a solar cell composite passivation layer, a preparation method thereof and a solar cell, and belongs to the technical field of solar cells. The solar cell composite passivation layer comprises a first silicon oxide layer, a titanium / zirconium doped aluminum oxide layer, a second silicon oxide layer and a silicon nitride layer which are sequentially stacked in the direction away from a silicon substrate. According to the composite passivation layer, through a multi-level synergistic effect, a hydrogen atom diffusion path is effectively regulated and controlled, formation of bubble defects in the passivation layer is inhibited, excessive aggregation of hydrogen atoms to a silicon substrate is blocked, and interface stability and passivation uniformity are improved. When the composite passivation layer is adopted in the solar cell, the conversion efficiency, the open-circuit voltage, the short-circuit current and the filling factor of the solar cell are improved, and the composite passivation layer has important significance in the technical field of solar cells.

The present invention relates to a method for producing a composite adsorbent of ferrocyanide of a transition metal in the matrix of silica gel comprising the following steps: (i) preparing a first aqueous composition comprising at least the mixture of a sodium or potassium ferrocyanide with a sodium silicate solution so as to obtain the dissolution of salts; (ii) preparing a second composition comprising the mixture of at least: a transition metal salt chosen from one or more of the following compounds: nickel, copper, zinc, cobalt, and an inorganic acid; (iii) mixing the first aqueous composition with the second composition until a suspension is obtained; (iv) adding an inorganic acid or base so that the suspension obtained at the end of step (iii) has a pH ranging from 4 to 9;(v) demixing the suspension obtained at the end of step (iv) so as to obtain a precipitate within a liquid phase; (vi) separating said precipitate, rinsing and drying the precipitate, so as to obtain a solid precipitate, characterized in that the first aqueous composition comprises a soluble rubidium or cesium salt, and the second composition further comprises a soluble metal salt chosen from one or more of the following compounds: aluminum, titanium, zirconium.;

The invention discloses a novel antibacterial environment-friendly ceramic and a preparation method thereof, and belongs to the technical field of ceramics, the method comprises the following steps: dissolving aluminum chloride, barium nitrate and ferric nitrate in a solvent, and stirring and mixing to prepare a first mixed solution; adding kaolin and carbon powder into the first mixed solution, and stirring and mixing to obtain a second mixed solution; boron, carbon, aluminum, boron oxide, zirconium dioxide and barium carbonate are dispersed in a dispersing agent to be mixed to prepare a third mixed solution; boron oxide, aluminum hydroxide, titanium boride, zirconium, silicon, sodium zirconate, sodium carbonate, calcium tungstate and zirconium dioxide are added into the second mixed solution to be stirred and mixed, and mixed slurry is prepared; the mixed slurry is used for preparing a blank body, the blank body is placed in a sintering furnace to be sintered in different temperature stages and sintering environments, and the prepared ceramic has high strength, is not prone to cracks in the environment where the temperature changes rapidly and is good in corrosion resistance.

A novel method for artificial photosynthesis utilizing a chemical system that operates by harnessing visible light and directly capturing carbon dioxide and water from the atmosphere. The system is based on self-organizing complexes comprising visible-light-sensitive chromophores, such as 2-phenyl indole and 2-phenyl benzoxazole, along with titanium tetrachloride, which autonomously perform continuous, complex chemical operations to produce long-chain (C2 to C17) oxygenated organic materials. The process employs earth-abundant metal coordination compounds, including titanium (Ti), zirconium (Zr), hafnium (Hf), and vanadium (V), in the solid state. These compounds form carbonated metal derivatives upon hydrolysis, which are subsequently reduced through proton transfer from water. The system initially generates C1 materials that oligomerize via a novel self-catalyzed mechanism intrinsic to the system's operation. Monitoring and characterization of the chemical transformations have been conducted using high-resolution MALDI-TOF (matrix-assisted laser desorption ionization-time of flight) mass spectrometry, supported by infrared (IR) spectroscopy and nuclear magnetic resonance (NMR) analysis. This innovation represents a sustainable and scalable approach for converting atmospheric CO2 into valuable organic materials.

Systems and methods for low-manganese welding alloys are disclosed. An example arc welding consumable may comprise: between 0.4 and 1.0 wt % manganese; strengthening agents selected from the group consisting of nickel, cobalt, copper, carbon, molybdenum, chromium, vanadium, silicon, and boron; and grain control agents selected from the group consisting of niobium, tantalum, titanium, zirconium, and boron. The grain control agents may comprise greater than 0.06 wt % and less than 0.6 wt % of the welding consumable. The resulting weld deposit may comprise a tensile strength greater than or equal to 70 ksi, a yield strength greater than or equal to 58 ksi, a ductility (as measured by percent elongation) of at least 22%, and a Charpy V-notch toughness greater than or equal to 20 ft-lbs at −20° F. The welding consumable may provide a manganese fume generation rate less than 0.01 grams per minute during the arc welding operation.