16results about How to "Promote interdiffusion" patented technology

The invention discloses a method for preparing a conductive ceramic with controllable resistivity, and relates to the technical field of conductive ceramics. The invention adopts three different particle sizes of aluminum oxide, titanium nitride, and silicon dioxide to form a ceramic slurry, which reduces the possibility of deformation, and adjusts the amount of titanium nitride added to adjust the ceramic resistivity, thereby realizing the controllable resistivity of the ceramic; the invention adopts methacrylic acid glycidyl ether and starch to form a gel skeleton, and uses amino-treated nanographite sheets as a support to ensure the mechanical strength of the ceramic; the ceramic slurry is used as a core material, and then a layer of gel is wrapped around the outer layer of the core material, and a three-stage high-temperature sintering treatment is performed to optimize the strength of the ceramic, while making the zirconium ions and nickel ions doped with the gel combine with the lanthanum ions in the atomized liquid, and form a zirconium-nickel-lanthanum-carbon crystal structure under a H2O / O2 atmosphere, which greatly improves the conductivity of the gel layer, thereby forming a uniform and continuous conductive path on the surface and inside of the ceramic.

The invention relates to the technical field of batteries, in particular to a battery cell and a battery. The battery cell comprises a battery cell inner layer area and a battery cell outer layer area from the center to the edge of the battery cell; positive plates of the battery cell comprise a first positive plate and a second positive plate, the first positive plate is arranged in an inner layer area of the battery cell, and the second positive plate is arranged in an outer layer area of the battery cell; the first active material layer of the first positive plate comprises a first binder; a second active material layer of the second positive plate comprises a second binder; the swelling ratio of the first binder is greater than that of the second binder; the adhesive force between the first positive plate and the diaphragm is recorded as A1, the adhesive force between the second positive plate and the diaphragm is recorded as A2, and A1 and A2 meet the following relational expression:-1 < = A1-A2 < = 4. The positive plate active material layers corresponding to the inner layer area and the outer layer area in the battery cell adopt different binders, so that the bonding effect of the positive plate and the diaphragm in the whole cell package, the electrolyte wettability and the production efficiency can be balanced.

This invention discloses a SiC with an ultra-high temperature ceramic gradient coating. f / SiC composite materials, their preparation methods, and applications. A double-layer glow discharge plasma surface metallurgical method is used to prepare SiC composite materials. f A (Hf,Si,Ta)C gradient composite coating was prepared on the surface of the SiC composite material. This coating was able to resist SiC in an oxygen atmosphere at 1773 K. f Effective protection of SiC composite materials. The specific advantages of this invention are: (1) Ion bombardment of the substrate significantly improves the point defects and conductivity of the composite substrate; (2) The (Hf,Si,Ta)C coating has a continuous gradient structure, forming a good metallurgical bond between the coating and the substrate, with high bonding strength; (3) The similar thermal expansion coefficients of the (Hf,Si,Ta)C coating and the substrate can improve the thermal mismatch between the coating and the substrate, reducing the tendency for coating peeling and cracking during service; (4) The (Hf,Si,Ta)C coating system has a high service temperature and self-healing ability. The coating prepared by this invention has excellent high-temperature protection performance, improving the protection of SiC. f The high-temperature service life of SiC composite materials has broad application prospects in the aerospace field.

The invention discloses a preparation method of a high-adhesion self-repairing polyurethane elastomer, which specifically comprises the following steps: taking polytetrahydrofuran glycol and isophorone diisocyanate as raw materials, taking tannic acid and 4, 4 '-diaminodiphenyl disulfide as chain extenders, and adopting a one-pot polymerization method to prepare high-adhesion polyurethane. The polyurethane elastomer is endowed with self-repairing performance by introducing an aromatic group disulfide bond and a dynamic hydrogen bond, the prepared material can complete the repairing process within 2 hours at the temperature of 80 DEG C, and the adhesive force on steel is greater than 10 MPa. A new insight is given to preparation of a high-adhesion self-repairing material, the synthesis method is simple, and the prepared polyurethane has excellent adhesion and self-repairing performance and can be applied to multiple fields.

A device and method for improving the surface finish and film-base bonding strength of the inner wall coating of a tube and barrel component. The present invention aims to solve the problems of poor surface finish and weak film-base bonding strength of the inner wall coating of a tube and barrel component. The device for improving the surface finish and film-base bonding strength of the inner wall coating of a tube and barrel component of the present invention comprises a metal cathode arc source, a magnetic field coil, a baffle, a shielding cover, a shielding baffle, an anode rod, an auxiliary anode, an air intake pipe, a vacuum chamber, a metal cathode arc DC power supply, a pulse bias power supply and an auxiliary anode DC power supply, and the tube and barrel component is placed in the vacuum chamber. The present invention adopts an arc-enhanced glow discharge process to perform high-density plasma etching cleaning and activation on the inner surface of the tube and barrel component, and also provides electron heating in the early stage of coating growth, which can greatly improve the film-base bonding strength. In addition, a shielding cover is installed at the pipe mouth facing the metal cathode arc source, which can effectively prevent the film-forming material on the outer wall of the pipe mouth from being sputtered back into the pipe for deposition, thereby improving the roughness and finish of the coating surface.

The invention belongs to the field of sodium-ion batteries, and particularly relates to a sodium-ion battery positive electrode material and a preparation method and application thereof. The preparation method comprises the following steps: S1, carrying out first mixing on a nickel source, a manganese source, a tellurium source and water to obtain a mixed solution, adding a precipitator and a chelating agent, and carrying out reaction, aging and first drying to obtain a precursor; and S2, carrying out second mixing on the precursor, a sodium source and a calcium source, carrying out second drying, compacting, and sintering to obtain the sodium ion battery positive electrode material, the tellurium element is introduced to regulate and control the particle morphology of a precursor microstructure and realize an in-layer Te-Ni-Ni-Te ordered upper layer structure, the ligand level structure is adjusted, and lattice oxygen loss is inhibited; the calcium element is added to maintain the cation content in the sodium layer and relieve O2-O2-rejection in the sodium extraction process, so that the prepared sodium ion battery positive electrode material can maintain a pure P2 type structure and has excellent capacity performance and cycle performance.

The present application relates to the technical field of low-temperature negative electrode material preparation of lithium ion batteries, and particularly relates to a silicon-silver-indium ternary alloy thin film negative electrode material for lithium ion batteries and a preparation method thereof, the material comprises 40 at% to 99 at% of silicon, 0.1 at% to 30 at% of silver and 0.1 at% to 30 at% of indium in terms of atomic percentage. The preparation method comprises a melting metallurgy rolling process or a magnetron sputtering deposition process. In the ternary alloy system, the silver improves the electronic conductivity, the indium optimizes the lithium ion diffusion kinetics and the interface stability, and the synergistic effect of the two makes the material exhibit high capacity, high initial efficiency and good rate performance at normal temperature and low temperature. The material system has good compatibility with the above two differentiated preparation processes, and provides a solution for the large-scale and precision application of high-performance silicon-based thin film negative electrodes.

The invention provides a battery roller blank and a preparation method thereof, and relates to the technical field of roller manufacturing. The preparation method of the battery roller blank comprises the following steps: preparing a lower pouring steel ingot; placing the steel ingot in a heating furnace in a hot feeding manner, controlling the temperature in the heating furnace to be 1230 + / -10 DEG C, and performing upsetting and drawing forging twice to obtain a blank; and the blank is taken to be subjected to finished product heating number drawing, the heating temperature is 1180 + / -10 DEG C, and the battery roller blank is obtained. Molten steel heated to the temperature of 1630-1650 DEG C is poured to prepare a lower pouring steel ingot, a demolded hot ingot does not need to be preheated and is directly placed in a heating furnace to be heated and forged, the preparation process of a battery roller blank is greatly shortened, and the production cycle and cost are reduced; compaction is carried out in a two-upsetting and two-drawing mode, the compaction effect of the blank can be guaranteed, a forging mode that two pieces are produced by one ingot is adopted for a roller with the roller body diameter not larger than 800 mm, and concave centers are prevented from being generated on the end face of the roller head of a finished product.

The invention provides injection ferrite magnetic powder, a preparation method, an injection ferrite material and application, the chemical formula of the injection ferrite magnetic powder is Sr < 1-x-y > LaxCayFe < 12-z > CozO19, the D50 size is 1.5-2.5 [mu] m, and the average length-diameter ratio L / D is 1.2-3.0; wherein 0 lt; x is less than or equal to 0.4, 0lt; y is less than or equal to 0.4, 0lt; z < = 0.25, 1.3 < = x / z < = 1.6. The injection ferrite magnetic powder provided by the invention not only has relatively large particle size, but also has good particle morphology due to the average length-diameter ratio L / D of 1.2-3.0, so that the injection ferrite magnetic powder has relatively excellent flowability; in addition, due to doping of La and Co, the injection ferrite magnetic powder also has excellent magnetic performance.

The application relates to the technical field of corrosion-resistant alloy coating, in particular to a low-heat semi-solid surfacing process and application thereof, which comprises the following steps: using a plasma transferred arc surfacing gun with a double-gas channel, one channel is used for spraying low-heat semi-solid surfacing coating material, and the low-heat semi-solid surfacing coating material is heated to 6800-7800 DEG C through an ion source and is sprayed to the surface of a base material in a state of being protected by inert gas, and is scattered on the surface of the base material at an incident angle of 60-75 DEG; meanwhile, the other gas channel of the plasma transferred arc surfacing gun sprays alloy pellets to perform surfacing shot blasting, and a high-dense, continuous and uniform surfacing layer is formed on the surface of the base material; the low-heat semi-solid surfacing process has the advantages that the high-temperature corrosion resistance of the surface coating of important equipment such as thermal power, nuclear power, ocean, national defense and military industry can be improved.

The invention provides a dynamic rolling compensation sintering method for preparing an expanded polytetrafluoroethylene plate, which comprises the following steps: coating a biaxially oriented polytetrafluoroethylene film on a steel roller from an unreeling machine, and controlling the rotating speed of the steel roller and the advancing speed of the film on the unreeling machine, so that the expanded polytetrafluoroethylene film has a certain tension force; therefore, the steel roller is tightly coated with the thin film, and the thin film layers are tightly attached to each other. After wrapping is finished, the steel roller coated with the polytetrafluoroethylene film is put into a sintering furnace to be sintered, during sintering, the expanded polytetrafluoroethylene film is continuously rolled through a pressure roller above the steel roller, parameters such as the thickness and the surface density of the expanded polytetrafluoroethylene film are corrected in real time, and the expanded polytetrafluoroethylene film is obtained. Therefore, the consistency of the performance indexes of the expanded polytetrafluoroethylene plate is realized. The expanded polytetrafluoroethylene plate or strip produced by the method is simple in process requirement and high in production efficiency.

The invention discloses high-strength gold-based alloy brazing filler metal and a preparation method and application thereof, and belongs to the technical field of alloy brazing. The brazing filler metal comprises the following components in percentage by mass: 0.5 to 5.0 percent of Ni, 0 to 10.0 percent of Cu, 0 to 2.0 percent of Ag, 0.1 to 1.0 percent of Pd and the balance of Au. Pd and Ag are added into the brazing filler metal, the brazing filler metal is applied to brazing of the base metal of the nickel-based superalloy containing Cr or / and Mo, the bonding strength of a welding joint of a nickel-based superalloy component and the oxidation resistance of the joint can be effectively improved, and therefore the brazing can play a more sufficient effect in brazing of the nickel-based superalloy, and the welding quality of the nickel-based superalloy component is improved. And the performance of a welding joint of the nickel-based high-temperature alloy component is improved, so that the normal operation time of the nickel-based high-temperature alloy component under extreme working conditions is prolonged.

The invention discloses a preparation method of a biological porous zinc alloy with a composite structure implanted in the orthopedics department, which comprises the following steps: firstly, carrying out optimization design modeling by utilizing a computer pore structure, preparing a porous zinc alloy with a macroscopic pore structure by adopting a selective laser melting process according to a modeling result, and then preparing a micro-nano pore structure by adopting a vacuum-gas phase dealloying process. And obtaining the biological porous zinc alloy with the composite structure. On the basis of laser additive manufacturing and a vacuum-gas phase dealloying process, the biological porous zinc alloy with the macro-micro double-scale composite pore structure is obtained, the structures of macro pores and micro pores can be adjusted by adjusting process parameters, the mechanical property and modulus regulation and control of the porous zinc alloy are met, and meanwhile the mechanical property of the porous zinc alloy is improved. And the biological activity of the porous zinc alloy is effectively improved, adhesion, growth and differentiation of bone cells are well promoted, personalized pore structure optimization design and preparation are achieved, and the porous zinc alloy is suitable for orthopedic implant materials.

The invention relates to the technical field of new material research and development, and discloses energy-saving heating equipment for new material research and development and a using method thereof.The energy-saving heating equipment comprises a protective shell and a base, a heating tank is fixedly installed in the protective shell, and a heating device and a stirring and cleaning device are arranged in the protective shell and the heating tank correspondingly; after a plurality of mixed new materials are added into the heating tank through the feeding port, an infrared heating pipe is started to heat the heating tank, and meanwhile, a rotating motor drives a driving gear to rotate so as to drive a first gear and a second gear to rotate, so that a rotating shaft and a rotating rod can rotate in opposite directions; the stirring rods installed on the surfaces of the rotating shaft and the rotating rod fully stir new materials in the heating tank, the arc-shaped connecting pieces installed on the surfaces of the stirring rods drive the scraping plates to clean the inner wall of the heating tank, stirring is conducted in the heating process, mutual diffusion and fusion between material molecules are easier, and the research and development efficiency is improved.

The application discloses a preparation method of a high-temperature alloy, which comprises the following steps: (1) mixing high-temperature alloy raw material powder with a granulating agent to perform granulation to obtain granulated raw material; and (2) under vacuum conditions, the granulated raw material is sintered by using oscillation hot pressing, and during sintering, an alternating load is adopted to control the grain growth process, so that the high-temperature alloy is obtained. The preparation method of the high-temperature alloy first performs granulation on alloy powder, and then controls the grain growth process of the product by controlling the alternating load of the oscillation hot sintering process, so that the grain refinement is facilitated, the fine-grain strengthening effect is generated, and the mechanical properties of the high-temperature alloy product are greatly improved. In addition, through the mutual synergistic effect of the granulation and the alternating load, the compactness of the product can be improved.

This invention discloses an integrated method for interfacial metallurgical bonding and temperature-controlled rolling of composite steel pipes. The method includes composite billet pretreatment, pre-placement of a Ni-Cu-Ti composite alloy gradient transition metallurgical induction layer at the interface, billet pre-clamping and positioning, gradient temperature-controlled preheating, interfacial self-induction metallurgical bonding, synchronous temperature-controlled rolling, interfacial metallurgical strengthening rolling, gradient cooling shaping, and finished product inspection and finishing. This invention achieves atomic-level fusion of the interface through the synergistic effect of the induction layer and self-induction metallurgical bonding. It simultaneously strengthens the interface and calibrates dimensions through fluctuating rolling force, solving the pain points of poor interfacial bonding and process disconnect in existing technologies. Unexpectedly, it achieves effects such as self-release of interfacial stress and improved billet toughness, thereby enhancing the quality and service stability of composite steel pipes and adapting them to harsh working conditions.