317 results about "Silicon alloy" patented technology

The invention provides a pre-buried brazing flux aluminum alloy brazing filler metal plate blank and a preparation method thereof, a pre-buried brazing flux composite aluminum alloy brazing plate strip and a preparation process and application thereof. After the mixed powder of the aluminum-silicon alloy and the brazing flux is pressed into the cylinder, the cylinder is extruded into the aluminum alloy brazing filler metal plate blank with the pre-embedded brazing flux through the semi-continuous extruding machine, the production efficiency is high, the yield is high, and the prepared aluminum alloy brazing filler metal plate blank with the pre-embedded brazing flux is uniform in component and good in extensibility. The prepared pre-buried brazing flux aluminum alloy brazing filler metal plate blank and an aluminum alloy core material are easy to roll and compound, the obtained pre-buried brazing flux composite aluminum alloy brazing plate strip has a good compound interface, does not have obvious defects such as slag inclusion, bubbles, layering and peeling, has the mechanical property meeting the requirements, has excellent ductility and good brazing performance, and is suitable for large-scale production. And the brazing effect with other aluminum components is good, the surface of a workpiece is bright, and soldering flux traces are not left. The technology can greatly simplify the manufacturing process of the aluminum heat exchanger, and can be used for large-scale industrial production.

The invention provides a secondary battery and an electrochemical device, and relates to the field of electrochemical energy storage. The secondary battery comprises an electrolyte and a negative pole piece, the electrolyte comprises a first substance, and the first substance comprises at least one of compounds with a structure as shown in a formula I; the negative pole piece comprises a negative pole material layer; the negative pole material layer comprises carbon black, single-walled carbon nanotubes, carbon fibers and a silicon-based material; the silicon-based material comprises at least one of a silicon-carbon material, a silicon-oxygen material, a silicon alloy material and a pure silicon material. According to the secondary battery, the electrolyte is designed to contain a compound with a specific structure as shown in the formula I, the mass content of the compound is controlled to be 0.5%-30%, and meanwhile, the negative electrode material layer comprises carbon black, single-walled carbon nanotubes and carbon fibers, so that the high-temperature storage performance, the cycle performance and the high-low-temperature fast charging performance of an electrochemical device containing a silicon negative electrode are remarkably improved.

The invention relates to the technical field of metal heat treatment, in particular to a silicon alloy steel bearing ring high-temperature salt bath quenching process for a high-temperature load environment, which comprises the following steps: S1, carrying out surface sand blasting treatment on a silicon alloy steel bearing ring; s2, stepped heating-heat preservation-cooling treatment is carried out, and the uniformly austenitized ferrule is obtained; s3, the uniformly austenitized ferrule is immersed in a composite salt bath; s4, staged cooling treatment of an air cooling stage and an oil cooling stage is conducted in sequence; s5, the martensite matrix ferrule is subjected to subzero treatment and staged heating; and S6, multi-stage tempering treatment with different temperature gradients is conducted, and the final high-temperature bearing ring is obtained. Through the combined process of stepped austenitizing, composite salt bath ultrasonic quenching, graded cooling, deep cooling and multi-stage tempering, homogenization and stabilization of the structure of the bearing ring are achieved, and the dimensional stability and the tempering resistance of the bearing ring in the high-temperature load environment are improved.

The invention discloses a preparation method of a high-quality solid welding wire. The preparation method comprises the following steps of S1, raw material selection and pretreatment, S2, a drawing forming process, S3, surface treatment, S4, aftertreatment and finishing, S5, quality detection and control and S6, packaging and storage. Before work starts, raw materials are selected, low-carbon steel is selected, the purity of S is controlled to be smaller than or equal to 0.010%, the purity of P is controlled to be smaller than or equal to 0.015%, the size is controlled to be phi 5.5-6.5 mm, then oxide skin is removed through sulfuric acid for 5-10 min, after flushing is conducted through high-pressure water, residual acid is neutralized through alkali liquor, corrosion is prevented, then hot air drying is conducted at the temperature of 100-120 DEG C, it is guaranteed that no water exists on the surface, and the low-carbon steel is obtained. According to the method, the raw materials are pretreated, so that the cleanliness of the raw materials is improved, the production quality of the thick solid welding wire is improved, then the raw materials are smelted after being pretreated, and then a mixture of rare earth, deoxidized silicon, alloy vanadium and copper phosphorus tungsten carbide is added according to different environment requirements so as to increase the variety of the welding wire.

The invention relates to a low-stress copper-cobalt-nickel-silicon alloy and a preparation method and application thereof. The low-stress copper-cobalt-nickel-silicon alloy comprises 0.5 wt%-1.0 wt% of Ni, 0.005 wt%-0.4 wt% of Co, 0.1 wt%-0.3 wt% of Si, 0.05 wt%-0.4 wt% of Sn, 0.01 wt%-0.02 wt% of P, 0.05 wt%-0.3 wt% of Zn and the balance Cu and inevitable trace impurities. The preparation method of the low-stress copper-cobalt-nickel-silicon alloy comprises the steps of burdening, smelting, casting, hot rolling, rough rolling, primary annealing, intermediate rolling, aging heat treatment, finished product rolling and secondary annealing. The preparation method comprises the following steps: proportioning and smelting according to the mass percent of each element of the copper alloy; the aging heat treatment is stepped aging heat treatment, heating is conducted to 200-350 DEG C, heat preservation is conducted for 1-2 h, then heating is conducted to 400-500 DEG C, and heat preservation is conducted for 10-12 h.

The invention provides a low-sulfur manganese-silicon alloy and a production method thereof.The method comprises the steps that silica, coke and manganese ore are crushed and then mixed with lime, and smelting raw materials are obtained; a closed electric furnace is filled with smelting raw materials for smelting, and alloy melt is obtained; the alloy melt is transferred into a ladle, a desulfurizing agent is added for the desulfurization process, and manganese-silicon alloy molten iron is obtained; and the manganese-silicon alloy molten iron is poured into a mold for ingot casting, and a manganese-silicon alloy finished product is obtained after cooling. According to the method, the method capable of effectively reducing the sulfur content in the manganese-silicon alloy is provided through the steps of raw material crushing and mixing, in-furnace power transmission refining, out-of-furnace desulfurization, casting molding and the like, the low-sulfur manganese-silicon alloy is produced, and therefore control over the sulfur element content in a steelmaking product is facilitated.

The invention discloses a preparation method of a low-magnetic-conductivity high-strength iron-silicon magnetic powder core, which comprises the following steps of: 1, phosphating iron-silicon alloy magnetic powder, and physically coating the phosphated magnetic powder by using magnesium aluminum silicate gel with a layered structure; 2, preheating the magnetic powder obtained in the step 1 in an inert atmosphere; 3, sufficiently and uniformly mixing magnesium aluminum silicate gel, a binder and the magnetic powder obtained in the step 2, heating a mixed system, and mechanically stirring until the powder is dried; 4, the magnetic powder obtained in the step 3 and a lubricant are mechanically stirred to be evenly mixed and then pressed into a magnetic powder core blank; and 5, the blank obtained in the step 4 is subjected to heat treatment under the inert protective atmosphere. The magnetic powder core prepared by the method has the characteristics of low magnetic conductivity and high strength.

The invention discloses an ytterbium-silicon alloy and a preparation method and application thereof, and relates to the technical field of alloys. According to the preparation method of the ytterbium-silicon alloy, the ytterbium-silicon alloy with the system composition basically consistent with the eutectic point is successfully prepared by controlling parameters such as the heating rate and the temperature in the eutectic melting process of ytterbium and silicon, the melting point of silicon can be reduced to 1253 DEG C or below, and follow-up machining and using of the ytterbium-silicon alloy are greatly facilitated. When the ytterbium-silicon alloy prepared by the method is used as a raw material for introducing silicon to prepare a carbon fiber reinforced silicon carbide composite material, the composite material with the bending strength reaching up to 249.85 MPa or above can be obtained, and the ytterbium-silicon alloy has a wide application prospect in the fields of aviation and the like.

A silicon composite material and a preparation method, a negative electrode plate, a battery, and an electrical apparatus. The silicon composite material comprises a silicon-based material and a flexible material, wherein the hardness of the flexible material is less than the hardness of the silicon-based material. The silicon-based material comprises at least one of elemental silicon, a silicon-oxygen compound, a silicon-carbon composite, a silicon-nitrogen composite, and a silicon alloy. The flexible material is located on at least part of the surface of the silicon-based material. By means of the combination of the flexible material and the silicon-based material, the risk of a current collector being crushed during the preparation of an electrode plate can be reduced, and the compacted density of the electrode plate can be improved, thus increasing the energy density of a battery.

The application relates to the technical field of image recognition, and discloses a method for detecting explosion welding defects of plated aluminum-zinc-silicon coil plates based on X-ray images. The method acquires an X-ray image sequence of an explosion welding interface of a plated aluminum-zinc-silicon coil plate and inputs the sequence into a physical constraint feature decoupling network, the network comprising a feature extraction backbone, a physical attenuation constraint branch and a defect identification branch. The physical attenuation constraint branch calculates a physical reconstruction loss of a multi-scale space feature map according to an X-ray mass attenuation coefficient matrix of the plated aluminum-zinc-silicon alloy, and reversely propagates the loss to the feature extraction backbone as a regularization term, so as to forcibly separate speckle background features conforming to the physical attenuation law. The application makes the feature decoupling comply with the physical attenuation law, eliminates the interference of speckle artifacts on micro-defect judgment, and avoids missed detection caused by micro-defects being covered by speckles.

The application discloses a method for regulating solidification structure of aluminum-silicon-iron alloy by gas-phase synergistic double-melt blending. CH4 gas is introduced into high-temperature aluminum-titanium alloy liquid, C-containing active particles are decomposed from the CH4 gas in the alloy melt and gas-liquid reaction occurs between the C-containing active particles and Al and Ti particles to generate intermediate phases such as Al4C3 and Ti3AlC and unstable TiC particles, and the intermediate phases react to generate thermodynamically stable TiC nanoparticles. Meanwhile, aluminum-silicon alloy melt and aluminum-iron alloy melt with significant difference in volume and temperature are blended in a controlled diffusion manner to obtain aluminum-silicon-iron melt. During the gas-liquid blending process, due to the opposite directions of solid / liquid interface advancing direction and solute diffusion direction during melt solidification, there exist non-local micro temperature and concentration fluctuations, and grain refinement is realized by controlling the solidification nucleation and diffusion growth process. The gas-liquid casting technology is a new process with multiple processes in synergistic action, and multiple processes can have a superposition effect under synergistic action, so that the synergistic refinement of aluminum-silicon-iron alloy second phase and aluminum grains is realized.

Vehicle component (100) for a vehicle, with: a component body (101) which is formed from a core material (103), wherein the component body (101) has a locally limited deformation zone (105) which is arranged planarly in the core material (103), wherein the deformation zone (105) has a locally variable tensile strength according to a predetermined tensile strength profile in order to influence a deformation process of the component body (101) when a force is applied to the component body (101), wherein the component body (101) has a body surface, wherein a metallic coating is applied to the body surface, which is designed to prevent corrosion after manufacture and scaling during a hot forming process for the manufacture of the component body (101), wherein the coating comprises an aluminum-silicon alloy which, during the hot forming process, forms a stable alloy layer system with the core material to provide corrosion and scaling protection for the component body, wherein the vehicle component (100) is a hot-formed vehicle component, wherein the vehicle component (100) is a vehicle column, wherein the component body (101) has a body surface (401) and a sheet thickness (403) which describes the material thickness of the component body (101) in the direction of a surface normal (405) of the body surface (401), and wherein the deformation zone (105) completely penetrates the component body (101) with respect to the sheet thickness (403) and has an edge region which follows a perimeter of the deformation zone (105) on the body surface (401), and wherein the tensile strength in the edge region approaches the tensile strength of the material of the component body (101) surrounding the deformation zone (105) in order to form a homogeneous tensile strength transition, wherein the component body (101) is made of steel core material (103) with a tensile strength R M,K is manufactured in a range of 1200 MPa to 2200 MPa, wherein the deformation zone (105) has a tensile strength R M,D exhibits a range of 450 MPa to 1100 MPa, wherein the component body (101) has a body surface (401) and the area of ​​the deformation zone (105) on the body surface (401) corresponds to at least 0.05 to 0.4 times the area of ​​the body surface (401), wherein the tensile strength of the deformation zone (105) decreases continuously towards a center point of the deformation zone (105), wherein at least two tensile strength plateaus (107-1, 107-2) are formed in the deformation zone (105), which have different tensile strengths relative to each other and to the core material (103).

The embodiment of the present application provides a kind of N type TOPCon cell front silver aluminum paste and its preparation method and cell, wherein, the N type TOPCon cell front silver aluminum paste provided in the embodiment of the present application includes aluminum powder, silver powder, nano alloy powder, organic binder, glass powder and organic additive, wherein the nano alloy powder is one or more of nano silver aluminum alloy powder, nano aluminum boron alloy powder and nano aluminum silicon alloy powder.In nano silver aluminum alloy powder, nano aluminum boron alloy powder and nano aluminum silicon alloy powder, all have the characteristics of nano size particle size, high tap density, low oxygen content and high activity, so that the front silver aluminum paste added with the nano alloy powder can quickly form a good alloy with silicon at a lower sintering temperature, reduce the contact resistivity of front silver aluminum fine grid and cell, not only avoid the appearance of top needle print during EL test, but also improve the filling of cell and the efficiency of cell.

The invention discloses a recycling and silicon elementary substance recycling method based on waste aluminum-silicon alloy hydrolysis hydrogen production. Aluminum-silicon alloys such as ZL102 and the like are widely applied in many fields due to excellent processability and corrosion resistance of the aluminum-silicon alloys, however, a large amount of waste aluminum alloys are generated due to large-amount application of the aluminum-silicon alloys, and how to recycle the aluminum-silicon alloys is a key technical problem of improving energy utilization. The high-silicon aluminum alloy and the low-melting-point metal are combined to prepare the novel aluminum-based alloy used in the field of hydrolysis hydrogen production, the hydrogen production efficiency can reach 92.4% at most by regulating and controlling the content of the low-melting-point metal, and the hydrogen production rate can reach 396 ml / (min.g); the problems that a traditional waste aluminum recycling technology is complex in process and high in energy consumption, and a large amount of aluminum needs to be diluted to be utilized in a preserve mode are effectively solved, and a new recycling way is provided. Meanwhile, the monatomic silicon is separated and recovered by adopting an acid pickling method, the recovery rate is 97.6%, and the purity of the monatomic silicon can reach 94.3%.

The invention relates to a phase shift mask substrate and a dynamic magnetron sputtering preparation method thereof, a MoSi-based gradient film layer is continuously and dynamically deposited on the substrate, and the method comprises the following steps: carrying out first-stage deposition on the substrate by adopting a molybdenum-silicon alloy target so as to form a transition layer; carrying out second-stage deposition on the transition layer to form a main body functional layer through deposition; and third-stage deposition is carried out on the main body functional layer to form a surface modification layer through deposition, and the MoSi-based gradient film layer is obtained. The invention provides a one-step sputtering deposition method capable of dynamically and accurately regulating and controlling, so that the inherent contradiction between the performance and the stress of a single-layer uniform film is fundamentally solved, and the complexity and the uncertainty of a traditional multi-step process are avoided.

The invention provides a fan temperature-sensing frequency conversion control method and system for flexible production of an aluminum-silicon alloy electrolytic cell. The fan temperature-sensing frequency conversion control method comprises the steps that preset control parameters related to flexible production of the aluminum-silicon alloy electrolytic cell are obtained; temperature parameters during flexible production of the aluminum-silicon alloy electrolytic cell are collected; according to the collected temperature parameters, reference temperature parameters in the control parameters, reference frequency parameters in the control parameters and a preset control strategy, the target frequency of the draught fan is calculated; and on the basis of the target frequency, a frequency converter connected with a fan motor is controlled to operate, accurate and dynamic matching of the air volume of the fan and the production working condition is achieved, the energy consumption of the fan is reduced, and the control flexibility is improved.

The invention discloses a preparation method of a multistage refined hypereutectic Al-Si alloy, and relates to the technical field of preparation of aluminum-silicon alloy materials. The preparation method specifically comprises the following steps that hypereutectic Al-Si alloy and two rare earth elements are evenly mixed, a mixed material is obtained, the mixed material is subjected to electromagnetic induction heating melting in an inert atmosphere, and a melt is formed; the melt is rapidly cooled to the cooling end point, and solid-liquid coexistence two phases with refined primary Si grains are obtained; the solid-liquid coexisting two phases are subjected to electromagnetic stirring, and alloy liquid with primary Si grains further refined is obtained; and the alloy liquid is placed in a cooling agent to be cooled, and the hypereutectic Al-Si alloy obtained after primary Si crystal grain three-stage refining is obtained. Through the three-stage synergistic effect of providing a nucleation core through rare earth synergism, crushing grains through electromagnetic stirring and inhibiting growth through rapid cooling, the refining effect is far better than the simple superposition of the grain refining effects of three processes, and the method has the characteristics of remarkable grain refining and short process.

The present invention provides a porous silicon material in which the decrease in conductivity and charge / discharge efficiency is suppressed. [Solution] The method for producing a porous silicon material includes a precursor step of melting and rapidly solidifying raw materials containing Al, Si, and Ni to obtain a silicon alloy precursor, and a porosity-forming step of removing the Al component contained in the silicon alloy by alkaline treatment to obtain a porous silicon material.

The invention discloses a communication cable and a production method thereof. The communication cable comprises a conductor, an insulating layer, a shielding layer, an optical fiber net and a sheath which are sequentially arranged from inside to outside. Wherein the optical fibers are fixedly arranged and laid to form the optical fiber net, the optical fiber net is in a grid shape, the optical fiber net is fixed on the shielding layer in a wrapping mode, and the shielding layer is arranged outside the conductor in a sleeving mode. The insulating layer is prepared by blending a polyvinyl chloride cross-linked body and a polyethylene cross-linked body according to a ratio of 1: (0.5-1.5). Magnesium is introduced into an aluminum-silicon alloy to manufacture the shielding layer, and the shielding layer is composed of, by mass, 80%-90% of aluminum, 3%-12% of silicon and 1%-3% of magnesium. According to the communication cable, the temperature resistance of the insulating layer is optimized, magnesium with good conductivity and magnetism is introduced into the aluminum-silicon alloy, the electromagnetic shielding performance is optimized, electromagnetic interference can be well resisted, and the communication cable which is excellent in comprehensive performance, good in weather resistance and capable of positioning a damaged position is produced.

The invention belongs to the technical field of all-solid-state lithium batteries, and relates to a preparation method of a lithium-silicon composite negative electrode, the lithium-silicon composite negative electrode and an all-solid-state lithium battery. The preparation method of the lithium-silicon composite negative electrode comprises the following steps: generating a sulfide solid electrolyte coating layer on the surface of silicon powder in situ to obtain a silicon-based core-shell material; the passivated metal lithium powder and an FEC organic solvent are subjected to a contact reaction, a LiF protection layer is formed on the surface of the lithium powder in situ, and surface modified lithium powder is obtained; mixing the silicon-based core-shell material with the surface modified lithium powder, and carrying out heating treatment to realize lithium-silicon alloying, so as to obtain an alloyed product; and mixing the alloyed product, a conductive agent and a binder by a dry method, and carrying out calendaring molding to obtain the lithium-silicon composite negative electrode. The lithium-silicon composite negative electrode is obtained by constructing the core-shell structure and the multifunctional gradient interface layer step by step, and the electrochemical performance of the all-solid-state battery can be remarkably improved.

This invention provides a manufacturing method suitable for mass production that enables the production of silicon-based alloys with extremely low titanium concentrations without the need for high-grade raw materials. The raw materials, including a silicon source and a reducing agent, are heated and melted to produce a molten material, which is then subjected to additional refining. In the first stage of additional refining, a non-oxidizing gas containing nitrogen is blown into the molten material, and in the second stage of additional refining, an oxidizing gas containing oxygen is blown into the molten material.

The invention discloses a high-broadening-rate drawing-out forging method for a difficult-to-deform high-silicon alloy electroslag round ingot. Direct forging and drawing-out forging with few forging heating numbers are achieved. A conventional free forging device, a flat anvil, a common forging tool and a small round ingot are adopted, under the condition of six forging heating numbers, deformation of each heating number and the heating temperature range are optimally matched, large rolling reduction and vertical face light pressing are controlled in a staged mode to be combined to promote broadening, straightness, chamfer forging angles, step length and the shape of an intermediate blank are controlled, and forging precision is improved. Deformation of the blank is gradually transferred from the surface layer to the core part, and the forging structure is improved through the high deformation rate; sufficient metal flowing is ensured, so that the blank obtains larger deformation in the width direction, and stable deformation with high broadening rate is realized; and the surface quality and thermoplasticity are improved by adopting a rolling mode in the key heating number. And the wide forging stock with good surface quality is obtained only in a drawing-out forging mode, and the broadening rate is remarkably increased by 10% or above.

The present invention relates to the field of metal surface preparation by anodizing processes, and to a method for producing a corrosion-resistant aluminum-silicon alloy casting, and more particularly to the optimization of the anodizing of high-silicon aluminum castings by using a multi-stage anodizing cycle. The present invention also relates to a corrosion-resistant aluminum-silicon alloy casting and its use.

This invention provides layered silicon materials, their preparation methods, and applications. The preparation method includes: grinding and mixing silicon powder with metallic lithium, heat-treating under a protective atmosphere, and cooling to obtain a lithium-silicon alloy; mixing and stirring the lithium-silicon alloy with an organic solvent, first adding alcohol for alcohol elution to remove lithium, then acid washing and drying to obtain the layered silicon material. This method can produce a porous silicon structure formed by stacking ultrathin nano-silicon wafers. The pores between the ultrathin wafer layers form low-torsion ion channels, which can significantly accelerate the diffusion rate of lithium ions in the electrode, significantly improve the rate performance of the silicon material, and the porous structure formed by the stacked layers can provide a buffer space for the volume change of the active material during charging and discharging, reducing the risk of particle breakage and active material shedding; at the same time, the uniform stress distribution can also stabilize the electrode interface and extend the cycle life. This method is simple, safe, and energy-efficient.

The present application relates to a kind of high-strength toughness aluminum magnesium silicon alloy-based composite material and its preparation method.The present application introduces ceramic particles into aluminum magnesium silicon alloy by in-situ chemical reaction.At the same time, using extrusion pressure and rolling process, further refine the grain structure, strengthen the particle-matrix interface, so as to obtain the aluminum magnesium silicon alloy-based composite material mainly with α-Al and ceramic reinforced particles, which has excellent strength and plasticity under T6 condition.

The application belongs to the technical field of aluminum alloy materials, and particularly relates to a high-strength and high-toughness die-casting aluminum alloy material and a preparation method thereof. The aluminum alloy material comprises the following components in a percentage by weight: Si: 12.0-14.0%; Fe: <=0.1%; Cu: <=0.05%; Mg: 1.0-1.5%; Mn: 0.8-1.0%; Ti: <=0.3%; Zn: 5.0-7.0%; Ni: <=0.50%; Zr: 0.30-0.50%; V: 0.35-0.55%; Sr: <=0.06%; RE: <=0.5%, and the rest is Al. The Al is derived from aluminum alloy waste. The application fully utilizes elements such as silicon, magnesium, manganese, zinc, zirconium and vanadium, optimally designs the composition of the alloy material, and effectively improves the die-casting filling performance of the eutectic aluminum-silicon alloy. The aluminum melt overheating treatment is used to eliminate the heredity of the material.

The invention provides a tungsten-silicon alloy target material and a preparation method and application thereof. The preparation method comprises the steps that silicon powder and tungsten powder are mixed, and the tungsten-silicon alloy target material is obtained after pressure sintering; the silicon powder comprises first silicon powder with a particle size of 2-3 [mu] m and second silicon powder with a particle size of 5-6 [mu] m; the tungsten powder comprises first tungsten powder with the particle size being 5-6 microns and second tungsten powder with the particle size being 0.8-1.5 microns. According to the tungsten-silicon alloy target prepared through the preparation method of the tungsten-silicon alloy target, the size of monatomic silicon is smaller than 10 micrometers, tungsten-silicon alloy is distributed in a discontinuous net shape, the diameter of a single tungsten-silicon alloy is smaller than 10 micrometers, and in addition, the density of the tungsten-silicon alloy target is not smaller than 99.8%; moreover, the preparation method is simple in process, low in requirement on production equipment and suitable for large-scale popularization and application.

The invention belongs to the technical field of material preparation, and particularly relates to a preparation method and application of a nanoscale lithium-silicon alloy. Silane gas and diluent gas are mixed and injected into a plasma thermal field generated by a radio frequency plasma generator to generate silicon atoms, then inert gas serves as carrier gas, a lithium source is fed into the plasma thermal field to generate lithium atom steam, and the silicon atoms and the lithium atom steam are alloyed in the high-temperature thermal field; under the driving of cooling airflow, the lithium-silicon alloy particles enter the cyclone classification chamber through high-temperature and low-temperature cooling areas, the unreacted lithium source and the large-particle-size lithium-silicon alloy particles are retained in the cyclone classification chamber, and the small-particle-size lithium-silicon alloy particles are brought into the collection chamber, are adsorbed on the surface of the filter and are blown off by periodic back-blowing airflow; lithium silicon alloy powder to be coated is obtained; and finally, the nano lithium silicon alloy to be coated is introduced into the fluidized bed, silicon and carbon coating is conducted through a vapor deposition method, the lithium silicon alloy with the inner coating layer being element doped silicon and the outer coating layer being carbon is prepared, and the alloy can be used as a thermal battery, a solid-state battery negative electrode material and a liquid lithium ion battery lithium supplementing agent.

This invention discloses a continuous silicon nanowire anode material based on ALD seed layer-induced mesoporous confinement and its preparation method. The material comprises a mesoporous carbon framework with interconnected pore structures, and a one-dimensional silicon nanostructure located within the pores and extending continuously along the axial direction. The one-dimensional silicon nanostructure is connected to the inner wall of the mesoporous carbon through an interface modification layer, forming a continuous electron / ion transport pathway. The interface modification layer is formed by in-situ transformation of a metal oxide seed layer deposited on the inner wall of the pores under a silicon source gas and a reducing atmosphere, and its composition includes elemental metals, metal-silicon alloy phases, or metal silicides. Utilizing the spatial confinement effect of the mesoporous carbon, the radial expansion of the silicon nanostructure is restricted within the pores, reducing mechanical compression on the solid electrolyte; simultaneously, during the delithiation shrinkage process, the axial connectivity of the silicon nanostructure is maintained, alleviating solid-solid interface contact degradation, thereby improving the cycle stability and rate performance of the all-solid-state battery.

The invention provides an aluminum-silicon alloy and a heat treatment method and application thereof. The invention relates to an aluminum-silicon alloy, which comprises the following components in percentage by weight: 5.5 to 8 percent of Si, more than 0 and less than or equal to 0.15 percent of Mg, 0.5 to 0.9 percent of Cu, 0.2 to 0.4 percent of Mn, more than 0 and less than 0.3 percent of Fe, and the balance of A1 and inevitable impurities. By adjusting the components of the aluminum-silicon alloy and innovating the heat treatment process, the mechanical properties of the aluminum-silicon alloy treated by the heat treatment process are as follows: the tensile strength is greater than or equal to 220MPa, the yield strength is greater than or equal to 120MPa, the overall elongation is greater than or equal to 20%, the farthest-end elongation is greater than or equal to 15%, and the balance of strength and plasticity is realized. The method is suitable for the field of integrated casting of automobile lightweight structural parts, aerospace precision parts and the like with high requirements for the ductility, and has remarkable industrial application value.