35results about How to "Realize shape control" patented technology

The invention provides fabrication method and application of a one-dimensional MOF@ZIF core-shell structure. The fabrication method comprises the following steps of (1) dispersing different MOF materials in an ethanol water mixed solution to form a uniform suspension liquid C; (2) dissolving 2-methylimidazole in the ethanol water mixed solution to form a solution D; and (3) placing the suspensionliquid C in water bath for preheating to a reaction temperature, pouring a solution D, performing constant-temperature stirring so that conversion among different crystal-structure MOFs can be generated during the process, centrifugally separating a product, sequentially washing the product with ethyl alcohol and deionized water, and finally placing the product in a drying oven for drying to obtain MOF@ZIF core-shell structure powder. The morphology can be maintained after high-temperature carbonization and pickling of the one-dimensional core-shell structure MOF@ZIF core-shell structure, andthe obtained porous carbon@nitrogen doping porous carbon shows excellent electrochemical storage performance due to unique core-shell structure and in-situ nitrogen atom doping. The fabrication methodis simple to operate and is low in cost, the process is easy to control and observe, the conversion among the MOFs material and morphology control are successfully achieved, the prepared MOF@ZIF core-shell structure can have wide application prospect and can be used for storing electrochemical energy.

The invention discloses a perovskite film preparation method based on an anti-solution bath, and a solar cell. A proper solute is added into an anti-solvent to prepare anti-solutions with different functions; crystallization control and morphology regulation of a perovskite film are realized; and meanwhile, an interface between the perovskite film and a carrier transmission layer is passivated, sothat the surface defect state and the interface recombination are reduced, the carrier concentration and the extraction efficiency at the interface are improved, and the carrier transmission is better facilitated. The perovskite solar cell prepared with the anti-solution bath method has relatively high photoelectric conversion efficiency and high stability. The preparation method is simple and convenient, relatively short in production period and high in controllability and repeatability, and has a wide application prospect in the production and preparation of large-area and large-scale perovskite solar cells.

The invention relates to a shape correction and heat treatment method of low-plasticity and low-deformation material plates and belongs to the technical field of processing and forming of low-deformation materials. The method comprises the following steps: flattening the low-plasticity and low-deformation material plates under the action of high temperature and pressure, putting upper plate surfaces and low plate surfaces of the plates into water under the constraint action, rapidly cooling and carrying out solution treatment, then carrying out aging treatment to obtain plates with unevenness being less than 1.5mm/m. The method is capable of controlling shape and property of the low-plasticity and low-deformation material plates; the problem of the shape of the low-plasticity and low-deformation material plates is solved; the quality and the yield of the plates are ensured; the application of the low-plasticity and low-deformation material plates can be promoted and broadened; the low-plasticity and low-deformation material plates has good economic values and application prospects.

The present invention relates to a magnesium ion battery cathode material of a composite core-shell structure and a preparation method thereof, and an application of a magnesium ion battery cathode material of composite core-shell structure. The magnesium ion battery cathode material comprises a magnesium ion battery cathode material as a core and coating used for coating the surface of the core.The coating comprises a composite oxide. The preparation method comprises the steps of: dispersing the magnesium ion battery cathode material into a solvent to obtain a solution A; dispersing the composite oxide into the solution A to obtain a solution B; and finally, performing spraying and drying the solution B to obtain the magnesium ion battery cathode material. The preparation method is simple in process, mild in reaction condition, can achieve morphological control of materials, and is suitable for industrialized production, the prepared magnesium ion battery cathode material has a core-shell structure to greatly improve the structure stability of the material, and the battery prepared by employing the cathode material is excellent in electrical properties, and has high charge-discharge specific capacity and a capacity retention ratio.

The invention provides a welding method suitable for a thick plate type aluminum alloy. The welding method comprises the following steps that S1, welding grooves are formed in the adjacent to-be-welded end faces of two to-be-welded workpieces correspondingly, the two welding grooves form a U-shaped groove, and the U-shaped groove is arranged in an axial symmetric mode by taking a center line of agap between the two to-be-welded workpieces as an axis; and S2, backing welding of a first layer, cosmetic welding of a second layer and cosmetic welding of a third layer are sequentially performed inthe U-shaped groove from bottom to top. According to the welding method suitable for the thick plate type aluminum alloy, the technical problem that in a traditional thick plate welding process, theamount of deposit metal required for filling is relatively large, and a weld joint is non-uniformly contracted in thickness direction, so that generated welding deformation is relatively large is solved.

The invention discloses a functional low-loss shape memory alloy micro-nano powder core filament for laser additive manufacturing and a preparing method thereof. The functional low-loss shape memory alloy micro-nano powder core filament is characterized in that the outer skin of the powder core filament is the pure metal of one element, with the highest boiling point, in all elements constitutingthe shape memory alloy, the powder core of the powder core filament is a mixture consisting of the elementary substance metal micrometer powders of the other elements, except the element with the highest boiling point, constituting the shape memory alloy, or the micro-nano powder consisting of the alloy micrometer powder of other elements and the nano powder with the reinforcing function, wherein,the nano powder in the micro-nano powder accounts for 0.5-4% of the mass of the whole powder core filament; and the preparing method mainly includes the preparation of micro-nano powder, skin formingand powder filling, opening closing and drawing filament forming. The shape memory alloy micro-nano powder core filament is used as the material for the laser additive manufacturing, and the characteristics of being low in loss of shape memory function, high in forming precision and the like are achieved.

The invention relates to a high purity SiC/SiOx nanometer chain-like heterostructure preparation method, which comprises the following specific steps: (1) organic precursor preparing: dissolving polysilazane (PSN) and polyethylene (PVP) in dehydrated alcohol according to a certain ratio, and carrying out stirring mixing at a room temperature to form a micro-emulsion; (2) organic precursor curing: carrying out thermal insulation on the micro-emulsion for 30 min at a temperature of 200 DEG C in an air atmosphere to obtain a solid state organic precursor; and (3) high temperature pyrolysis: placing the solid state organic precursor in a common tube type atmosphere sintering furnace to carry out high temperature pyrolysis for a certain time at a certain pyrolysis temperature under a protection atmosphere to obtain a SiC/SiOx nanometer chain-like heterostructure. With the present invention, preparation of the high purity SiC/SiOx nanometer chain-like heterostructure having a perfect structure, regulation and control of morphology and size distribution can be achieved, and potential application prospects are provided in the field of optoelectronic nanometer devices and the like.

The invention discloses a functional low loss type CuZnAl micro-nano powder cored wire for laser additive manufacturing and a preparation method thereof. The functional low loss type CuZnAl micro-nanopowder cored wire is characterized by being composed of, by mass, 24.5%-26% of micron zinc powder, 3.5%-4% of nano aluminum powder and 70%-72% of a copper sheet, and the sum of the components is 100%. The preparation method mainly includes the steps of micro-nano powder preparation, skin forming and powder filling, closing and drawing into the wire. The CuZnAl micro-nano powder cored wire is usedas a laser additive manufacturing material, has the characteristics of small loss of shape memory function, high forming precision and the like, the problem of the low utilization rate of powder whenpowder is used as additive manufacturing materials is avoided, and the problem that high laser energy is more likely to cause functional loss when solid wire materials are used as the additive manufacturing materials is also solved.

The invention belongs to the field of nano material preparation, and relates to a silver ion pre-embedded manganese-oxygen-based nanowire as well as a preparation method and application thereof. The preparation method comprises the following steps that firstly, a proper manganese dioxide material is prepared as a precursor, manganese sulfate and potassium permanganate are selected as raw materials, and a manganese dioxide nanorod-like material is prepared as a precursor of subsequent hydrothermal reaction by adopting a precipitation method; a hydrothermal synthesis method is adopted to synthesize and prepare the silver ion pre-embedded manganese-oxygen-based material, the hydrothermal synthesis method has the advantages of simplicity in operation, controllable reaction conditions, uniformparticle size of the obtained nano material and the like, morphology regulation and control are performed by reasonably controlling reaction time and reaction temperature, and finally, expected morphology is obtained.

The invention relates to an additive manufacturing method of a metal glass lattice structure composite material part, and belongs to the technical field of additive manufacturing. A selective laser melting technology is adopted, laser process parameters are regulated and controlled, metal of different microscopic structures is formed at different positions, a lattice structure framework for regulating and controlling mechanical properties is embedded in a metal glass part, and forming of the metal glass and lattice framework integrated composite material part based on the same material is achieved. The lattice structure is applied to metal glass forming, microstructure units of a lattice structure model are established based on the topology theory, performance prediction is conducted on the lattice structure model through a homogenization method, and lattice structure parameters are optimized; by means of the method, large metal glass parts in any shape and with lattice structures can be directly formed in a near-net mode, the plasticity of the metal glass parts can be remarkably improved, the comprehensive mechanical property of the formed parts is improved, and the stability of the metal glass parts is enhanced.

A silicon boride-enhanced CuZnAl micro-nano powder core wire material for laser additive manufacturing and a preparation method thereof, characterized in that the powder core wire material is composed of 28% to 30% of the entire powder core wire material and its composition is zinc The micro-nano powder core composed of aluminum micron powder and silicon boride nano-powder whose mass accounts for 2% to 4% of the entire powder core wire material and copper skin whose mass accounts for 66% to 70% of the entire powder core wire material, each group The sum of the points is 100%, and its preparation method mainly includes the preparation of micro-nano powder, skin forming and powder filling, mouth closing and drawing into filaments. Using the CuZnAl micro-nano powder core wire material described in the present invention as a material for laser additive manufacturing has the characteristics of small loss of shape memory function and high forming accuracy, and avoids the low powder utilization rate that exists in the current powder as additive manufacturing materials. At the same time, it also solves the problem of using solid wire as an additive manufacturing material, which requires higher laser energy and is more likely to cause functional loss.