49results about How to "Implement gradient distribution" patented technology

The invention relates to a method to rehabilitate waste FCC (fluid catalytic cracking) catalyst, pertaining to recovery and resource regeneration field of waste catalyst. The invention reconstructs the frameword of catalyst through the synergistic effects of inorganic acid and organic acid, to construct developed micropores-mesoporous compound pore-channel structure system during the reconstruction process, and eliminates or passivates heavy metal of the waste catalyst, so as to dramatically increase the specific surface area of the rehabilitated catalyst; the eliminating rate of heavy metal can reach 30 percent, the micro reactor activity can be improved by more than 10 percent, and the invention has comparatively higher selectivity of liquefied gas and gasoline and lower yield ratio of coke.

The present invention provides a preparing method of liquid crystal polarizing sheet with broad wave reflection characteristic, pertaining to the liquid crystal material application and correlation technique field. Small molecule nematic phase liquid crystal, chiral polymerisable simple function group monomer, chiral compound, chiral or non-chiral polymerisable double functional group monomer, photo-initiation agent, polymerization inhibitor, and the like are homogeneously mixed to inject in a liquid crystal box whose interior surface has an inverse parallel orientation process; the liquid crystal is at a cholesteric liquid crystal plane textile state, to execute ultraviolet irradiation, thereby the light polymerisable monomers are cross linked into a polymer network, the screw pitch of the cholesteric liquid crystals are in a gradient distribution, so that the liquid crystal polarizing sheet with broad wave reflection characteristic can be obtained. The present invention can realize the liquid crystal polarizing sheet with broad wave reflection band, and the reflection area can be arbitrarily regulated according to the content of the chiral compound and the chiral polymerisable monomer; the optical quality can be reciprocally changed between the transparent state and the dispersion state with broad wave reflection characteristic; the polarizing sheet has simple preparing technique and low cost.

The invention discloses a gradient distribution technique for cobalt in a nickel-cobalt alloy plating layer of a crystallizer copper plate. According to the technique, before plating, the cobalt content and other plating liquid components are analyzed, and plating liquid is prepared in primary and secondary tanks; electroplating begins to be conducted, and first-time liquid falling is conducted after electroplating is conducted for 10 h; second-time liquid falling is conducted after electroplating is conducted for 20 h; third-time liquid falling is conducted after electroplating is conducted for 30 h; fourth-time liquid falling is conducted after electroplating is conducted for 40 h; when the electroplating time before the thickness of the plating layer is achieved is 24 h, adding of the cobalt is stopped; after liquid falling is conducted for 10 h, at the moment, the cobalt content in electroplating liquid maintains 6 g/L and over, and the cobalt content in the plating layer is 30-35%; during the last 24 h, the cobalt is continuously consumed; after electroplating is conducted for 24 h, the cobalt content in a machining layer is 15%; and after electroplating is finished, a liquid feeding pump is closed, a liquid return pipe is pulled out to enable the plating liquid to completely flow back into the primary tank, and then the crystallizer copper plate provided with the plating layer with the gradient-distribution cobalt content is obtained. The problems that the traditional processing volume on a cobalt content plating layer is very large, a great number of materials are wasted, and the product cost is increased are solved.

The invention relates to a gradient ultrahigh-temperature ceramic-based composite material and a preparation method thereof. The method comprises the following steps: (1) preparing slurry of gradientconcentrations, namely, by taking zirconium carbide powder as a solid component, and thermoset phenolic resin as a liquid component, mixing the solid component with the liquid component, and performing preparation so as to obtain slurry of n gradient concentrations, wherein n is greater than or equal to 2; (2) preparing prepregs, namely, respectively compounding the slurry of n gradient concentrations with n pieces of carbon cloth so as to obtain multiple prepregs; (3) preparing a composite material component, namely, laying and overlapping the multiple prepregs obtained in the step (2), and curing the prefabricated body obtained after laying so as to obtain the composite material component, wherein the content of the powder changes in a gradient manner along a thickness direction; (4) performing pyrolysis; (5) preparing a C/C blank by using a PIP (pyrolysis process); and (6) performing melting siliconing. By adopting the preparation method provided by the invention, the gradient ultrahigh-temperature ceramic-based composite material which is low in density and excellent in high-temperature ablation resistance can be prepared, and has substantive benefits in fields of space flightand aviation.

The invention discloses a cartilage-bone repair support with bionic gradient and a preparation method thereof. For the cartilage-bone repair support, a cartilage layer of an interwoven porous structure is prepared from sodium hyaluronate and chitosan, a subchondral bone layer of a porous structure is prepared from graphene oxide, chitosan and nano-hydroxyapatite, and structure, composition and function bionics of natural articular cartilage is realized by combining a coprecipitation method and a gradient refrigeration technology by referring to an in-situ bionic thorough. The obtained supporthas an upper layer of structure and a lower layer of structure, nano-hydroxyapatite presents change of bionic gradient distribution which is gradually increased from the cartilage layer to the subchondral bone layer; meanwhile, the cartilage layer in the upper layer is of a mutually penetrating interwoven hierarchical pore structure, the subchondral bone layer is of an array microtube structure which is axially arranged and is vertically through, the support material is excellent in mechanical performance, strong in interface bonding property and good in biological performance, and is expectedto become a novel composite material for treating cartilage-bone defect.

The invention relates to the technical field of high-temperature stealth coatings, and particularly discloses a functional gradient distribution high-temperature radar and infrared compatible stealth coating and a preparation method thereof. The surface of a metal base material is coated with the high-temperature radar and infrared compatible stealth coating, and from the surface of the metal base material, the coating sequentially comprises a metal bonding layer, a thermal matching ceramic layer, a dielectric ceramic layer, a first high-temperature electromagnetic periodic structure layer, a dielectric isolation layer, a second high-temperature electromagnetic periodic structure layer and an infrared stealth layer from bottom to top. The high-temperature radar and infrared compatible stealth coating disclosed by the invention has radar and infrared compatible stealth functions, adopts a multifunctional layer structure, realizes gradient distribution of thermal expansion coefficients of the coating, can realize better thermal matching with a metal substrate, and is good in thermal shock resistance; and the softening point temperature of the selected glass phase does not exceed 600 DEG C, so the coating has the advantages of low sintering temperature and short sintering time, and can reduce the influence of oxidation, damage, deformation and the like on the metal substrate.

The invention relates to a preparation method of a single-crystal high-nickel positive electrode material, a product and application thereof. The preparation method comprises two steps of calcining. According to the first step of calcining, a nickel-cobalt precursor and/or a nickel-cobalt-manganese precursor are/is mixed with a lithium salt, and the obtained mixture is calcined, so that a single-crystal lithium nickel cobalt oxide material and/or a single-crystal lithium nickel cobalt manganese oxide material can be obtained. According to the second step of calcining, the product calcined in the step step is mixed with an aluminum source, and the mixture is calcined, so that the single-crystal high-nickel positive electrode material can be obtained. The temperature of the first-step calcining is higher than that of the second-step calcining. According to the method, a specific mixing sequence and a calcining method are combined, so that the generation of an impurity phase in the preparation process of the single-crystal high-nickel positive electrode material is reduced, the pure-phase single-crystal high-nickel positive electrode material is obtained, the performance of the single-crystal high-nickel positive electrode material is improved; and with the method adopted, the content distribution of an aluminum element in the single-crystal high-nickel positive electrode materialis easy to regulate and control, and the formation of an Al gradient material is facilitated, so that the capacity performance of the single-crystal high-nickel positive electrode material is improved.

The invention relates to the field of laser additive manufacturing, in particular to a method and a device for preparing a gradient functional material of a flexible additional material. The proportion of mixed powder in each layer is changed in an additive manufacturing process, so that element gradient distribution of an additional material member is achieved. Dissimilar metal powder is fully and uniformly mixed, so that the uniformity and compactness of the additional material member are guaranteed. Meanwhile, residual powder in the mixed powder is achieved, so that the cost is saved to a great extent, and the quality of the additional material member is improved.

The invention relates to a zeolite roller capable of intensively treating exhaust gas. The zeolite roller comprises a rotating shaft, inner shells, outer shells, an air inlet duct, an air outlet ductand rollers; the multiple inner shells are arranged on the outer side of the rotating shaft at intervals and can be driven by the rotating shaft to rotate; the rollers are arranged between the inner shells and the outer shells; the surfaces of the rollers are coated with nano-scale zeolite materials, and thus volatile organic chemcials (VOCs) in the exhaust gas can be adsorbed; the adjacent outershells are connected through hot air pipes, hot air is introduced into the hot air pipes, and when the rollers rotate to the hot air pipes, the VOCs are desorbed through the hot air; and temperature controllers are arranged on the sides, about to enter the rollers, on the hot air pipes correspondingly, by adjusting the temperature controllers, the temperatures of the air in the hot air pipes are in gradient distribution, and then the VOCs desorbed from the different zeolite rollers can be classified and recycled.

The invention relates to a hydrogen-preventing coating based on the inner surface of a hydrogen storage device and a preparation method. The preparation method comprises the following steps of S10, after grinding and polishing the surface of a matrix step by step and cleaning and air-drying the surface of the matrix, injecting depositing Ni ions to the surface of the matrix by a PIII and D deposition technology to obtain a depositing Ni layer and an injection layer which are successively laminated from bottom to top; S11, injecting C ions uniformly to the surface of the injection layer to obtain an injecting C layer rich in C ions; and S12, annealing a sample forming the injecting C layer, wherein the surface of the injecting C layer is segregated to grow a graphene coating. The technicalscheme provided by the invention is high in operability and good in controllability. The bonding strength between the graphene coating and the matrix prepared by the method is high, and the graphene coating is good in hydrogen-preventing performance. By controlling the injection amount of C ions, the thickness of the graphene coating can be controlled. The hydrogen-preventing coating is high in technical realizability and is suitable for a structural material where graphene cannot grow on the surface directly.

The invention relates to the technical field of filter material manufacturing, and particularly discloses a production process of high-dust-holding-capacity filter paper. According to the production process, filter paper base paper is dipped and glued and then is subjected to drying treatment, in the drying treatment process, a drying cylinder is adopted for drying, and the temperature and the drying time of the drying cylinder are adjusted, so that the accurate control on the thermal migration process of a resin glue solution is realized, gradient distribution is formed in a filter paper interface, and the filter material dust holding capacity is improved.