56results about How to "Controllable thickness" patented technology

The invention relates to a method for preparing a multi-layer hydrogen-permeation-resisting composite membrane, and belongs to the material technology field. The method adopts a coupling technique of aluminum and aluminum alloy coating and micro-arc oxidation to form the multi-layer hydrogen-permeation-resistance composite membrane at the home position on a stainless steel basal body, the composite membrane comprises an alloy layer formed by the basal body and coating metal, a coating metal layer, a composite layer formed by the coating metal and oxide ceramic and an oxide ceramic layer, etc., as shown in picture 1. Compared with the prior art, the method has the advantages of the aluminum and aluminum alloy coating and the micro-arc oxidation, overcomes the defect of the prior single technique, and forms the multi-layer hydrogen-permeation-resistance composite membrane with high capability; the ceramic layer thereof has controllable thickness, high compactness, good quality, and firm combination with the basal body, thereby enhancing the hydrogen-permeation-resisting and the corrosion-resisting properties of the stainless steel, improving the hot oxidation resistance and the abrasion resistance of the stainless steel, prolonging service life of the stainless steel container, and strengthening safety precautions.

The present invention relates to a biofabricated Active Microfluidic Membrane (AMM) in a microfluidic network of a microfluidic device and a method for the in situ biofabrication of such a microfluidic network. More specifically, the invention relates to devices exhibiting (and methods of) positioning (i.e., erecting, modifying or removing a membrane matrix in situ in a microchannel of a microfluidic network of a microfluidic device. In one embodiment, the membrane comprises a single type of matrix constituent, such as chitosan, alginate, etc. Alternatively, the membrane may be composed of two or more matrix constituents, which may be integrated into one another or layered adjacent to one another.

The invention discloses a rapid preparation process of an inert dispersion fuel pellet. The rapid preparation process comprises the five steps of preparation of mixed material slurry, preparation of core-shell structure particles, core pressing, core-shell pressing and preparation forming. The preparation process overcomes the shortcomings of an existing inert dispersion fuel pellet preparation method, and the inert dispersion fuel pellet high in TRISO particle content, good in particle integrity, uniform in dispersion and high in silicon carbide matrix compactness can be obtained within a shorter process period. In the prepared inert dispersion fuel pellet, the silicon carbide matrix compactness is up to 92% or above, and the volume fraction content of TRISO particles in whole fuel is 30%-45%.

The invention provides a method for preparing metal surface fullerene film by electrophoresis, including the following steps: (1) pre-treatment is carried out on metal material surface, including oil removing cleaning, acid cleaning and activation on metal material; (2) electrophoresis solution is prepared, fullerene is dispersed in organic solution, ultrasonic oscillation, filtering and reducing are carried out, pH value is regulated to be 8-12; (3) film forming is carried out by adopting fullerene electrophoresis method; (4) heating is carried out. The method of the invention can be used for metal surface modification treatment, especially novel surface coated metal material can be derived by utilizing excellent characteristic of fullerene material, thus obtaining brand new metal product.

The invention relates to a novel high-strength low-volume-weight heat preservation fireproof decoration integration plate. The technical scheme includes that the integration plate is composed of a heat preservation layer, a fireproof layer which is coated on the outer surface of the heat preservation layer, a strengthening layer and decorative surface layer. The heat preservation layer is composed of polyurethane foaming plate double-faced composite cement alkali-resistant glass fabric. According to the plate and the preparation method, the strength is high, the heat preservation performance is high, the volume weight of the integration plate is less than 8kg/m2, compared with the volume weight of a conventional integration plate, the volume weight of the integration plate is reduced by 4-6kgm2, fireproof interface agent processing is performed on six surfaces of a core material, compared with existing products, the plate improves the fireproof performance substantially, and fire is prevented from spreading along a wall body.

The invention discloses a porous silicon rubber thin film containing graphene as well as a preparation method and application thereof. The preparation method comprises the following steps: mixing a silicon rubber precursor, a non-solvent or pore-forming agent, a volatile solvent and the graphene according to a certain ratio; carrying out ultrasonic treatment or stirring a mixed solution to obtain a film forming solution; de-foaming the film forming solution to form a film on a template; removing a solvent in a liquid blank film and curing and molding; removing the non-solvent or the pore-forming agent. The porous silicon rubber thin film containing the graphene, which is prepared by the preparation method, can be used as artificial skin or surgical dressing for covering skin defect wounds of mammals. According to the porous silicon rubber thin film containing the graphene as well as the preparation method and the application thereof, phase-separation film forming is induced by utilizing solvent volatilization and pores are formed by adopting a non-solvent or pore-forming agent filtering-out method; a preparation technology is simple and the pore diameter and the thickness of the thin film are controllable; the porous silicon rubber thin film containing the graphene has an ordered porous structure; meanwhile, the graphene has excellent antibacterial activity and can be used for preventing the wounds from being infected by bacteria and promoting the healing of the wounds when the porous silicon rubber thin film is used for the artificial skin.

A multi-layer hollow nanofiber used to culture cells is prepared through providing electrically spun fibers as template, alternatively adsorbing the polymers with positive and negative charges onto the surface of template, and using organic solvent to remove said template.

The invention discloses a double-shell-structure carbonyl iron powder composite wave-absorbing material and a preparation method thereof, wherein the composite wave-absorbing material is of a double shell layer core-shell structure, the core is carbonyl iron powder, the inner layer of the double-shell layer is an insulating layer, and the outer layer of the double-shell layer is a magnetic layer;the thickness of the insulating layer is 1 nm-1 [mu] m; and the thickness of the magnetic layer is 1nm-5 [mu] m; the preparation method comprises the following steps: coating the surface of the carbonyl iron powder with the insulating layer and coating the surface of a core-shell structure precursor by a chemical coprecipitation method. The surface of the carbonyl iron powder is coated with the double-shell layer by the chemical coprecipitation method. The impedance matching characteristic of the material is greatly improved, meanwhile, a large amount of nano-interface heterojunction is formedat the interfaces of the inner core and the double-shell layer, so that interface polarization is effectively induced, the scattering effect is formed for electron migration, and electromagnetic waveloss mechanisms such as multi-reflection absorption, strong ] ferromagnetic resonance and eddy current loss and the like of the material are greatly improved, so that the wave absorbing performance of the material is remarkably improved; the composite wave-absorbing material is simple in preparation method, is uniform and compact in coating and controllable in coating layer thickness and particlesize.

The invention discloses an Ir-X coating based on surface alloying modification and a preparation method thereof. The preparation method of the Ir-X coating is characterized in that a transition layer,namely a rhenium coating and an iridium coating are deposited on a carbon composite material or a graphite substrate in sequence, and then metal X powder, metallic oxide XO powder corresponding to the metal X and a chloride activating agent are mixed to obtain a permeating agent, and a powder pack cementation method is adopted for enabling the iridium coating to be subjected to surface alloying modification, so as to obtain the Ir-X coating. The Ir-X coating based on surface alloying modification has a low surface catalytic effect and surface temperature in an aerodynamic environment, and isgreatly improved in service performance when compared with the conventional silicide coating system.

The invention relates to a nanometer silver antibacterial biliary duct bracket and a preparation method thereof. The nanometer silver antibacterial biliary duct bracket belongs to a medical appliance, in particular to a medical biliary duct bracket for human bodies. The nanometer silver antibacterial biliary duct bracket comprises a plastic biliary duct bracket, wherein a nanometer silver deposition layer with the nanometer silver particle size being 0.5 to 200cn is uniformly attached on the inner and outer wall surfaces of the plastic biliary duct bracket. Compared with the prior art, the nanometer silver antibacterial biliary duct bracket has the advantages that the attaching of the stable nanometer silver coating on the existing medical bracket can be realized, silver ions are continuously released for realizing the antibacterial effect on intestine liquid, the secondary infection is prevented, in addition, the problem of medical bracket blockage is avoided.

The invention relates to the technical field of protective coatings on metal surfaces, and in particular relates to a preparation method and an application of a Ni/P-Ni/P/PTFE-PTFE composite coating. The method is applied to surfaces of mechanical components and can improve corrosion resistance, wear resistance and self-lubricating property of the mechanical components. A Ni/P plated layer is formed on the surface of a matrix by virtue of direct plating, a Ni/P/PTFE transition layer is formed on the surface of the Ni/P plated layer by virtue of composite chemical plating, and a polytetrafluoroethylene coating is sprayed on the surface of the Ni/P/PTFE transition layer to serve as a surface layer. The Ni/P-Ni/P/PTFE-PTFE composite coating provided by the invention is applied to surfaces of high-corrosivity vacuum pumps, semiconductor devices, scientific instruments and processes of biological pharmacy, medical treatment, chemistry & chemical industry and the like, and the protective coating can resist corrosion of high-corrosivity gases for a long time and can improve the service lives of the mechanical components.

A method of making a titanium oxide-containing coating composition comprises attaching an initiator to a pretreated titanium oxide to form an initiator/pretreated titanium oxide complex. The pretreated titanium oxide includes a plurality of pretreated titanium oxide particles which are titanium oxide particles that are pretreated with at least one metal oxide. The initiator/pretreated titanium oxide complex is contacted with a polymerizable unsaturated monomer such that a polymeric encapsulate forms on the initiator/pretreated titanium oxide particles to form polymeric encapsulated titanium oxide particles.

The invention relates to a coating method of a lithium manganite cathode material for a lithium battery. The coating method comprises the steps as follows: a MnSO4 aqueous solution and a sodium carbonate aqueous solution are prepared, and a complexing agent ammonium hydroxide is added to the sodium carbonate aqueous solution; then a peristaltic pump is utilized to continuously input the mixed aqueous solution into a reaction flask; after reaction is finished, precipitation is separated centrifugally, washed repeatedly by distilled water to remove residual ions and dried; then the precipitation and Li2CO3 or LiOH are mixed and ground uniformly for calcination in a muffle furnace step by step, a calcined product is dispersed in a graphite oxide solution and subjected to ultrasonic dispersion, centrifugation and drying; and the calcined product is placed in a vacuum tube furnace and calcined in protective atmosphere at the temperature of 400 DEGC-700 DEG C. According to the coating method of the lithium manganite cathode material for the lithium battery, direct contact between the cathode material and an electrolyte solution can be effectively reduced, dissolution of Mn ions is reduced, meanwhile, the conductivity of lithium manganite is further improved, the electrical loss is reduced, and specific capacity and rate capability of the lithium manganite cathode material are greatly improved.

The invention discloses an air condensation structure which is a shell body. The air condensation structure comprises an air inlet and an air outlet of hot air. The air condensation structure further comprises an air inlet and an air outlet of cold air. An overlaying type heat exchanger is arranged in the air condensation structure. The overlaying type heat exchanger is plastic fins which are placed in a criss-cross mode. A frame of an inclosure structure is arranged on the outer portion of the overlaying type heat exchanger. The air condensation structure is high in heat efficiency and is provided with a filtering structure, a flushing structure and an air uniform structure, the problem that wire chips block an air way can be avoided, air flow is smooth and even, and the structure is simple.

The embodiment of the invention discloses a method for preparing a surface plasma resonance chip. The method comprises the following steps of: a) placing a glass substrate in a growth chamber of a vacuum sputtering instrument; b) introducing argon gas into the growth chamber, vacuuming until the vacuum degree is 10<-1> to 10<-3>mbr and sputtering a chromium thin film on the glass substrate at a substrate-to-target distance of 5 to 9cm by taking chromium as a target material; and c) sputtering a metal thin film on a product obtained in the step b) at the substrate-to-target distance of 5 to 9cm under the condition of vacuum degree of between 10<-1> and 10<-3>mbr by taking metal as the target material. By using a vacuum sputtering principle and the substrate-to-target distance of 5 to 9cm, the prepared metal thin film has a flat surface and controllable thickness and can be used for the surface plasma resonance chip. Experiment results show that the prepared metal thin film has uniform thickness which is about 50nm.

The invention discloses a continuous production device and method for band-shaped black conductive foam. A spraying chamber (4), a solidification chamber (11), a drying chamber (15) and a cooling chamber (20) are sequentially distributed between an unwinding machine (1) and a winding machine (28), a spraying driving roller (3), an atomizer (7) and a spraying pipe (8) are installed in the spraying chamber (4), a solidification driving roller (10) and infrared solidification heaters (12) are installed in the solidification chamber (11), a drying driving roller (19) and infrared drying heaters (16) are installed in the drying chamber (15), a cooling driving roller (25) and a cooling water tank (21) are installed in the cooling chamber (20), and all the components form the production device. According to the continuous production device and method for the band-shaped black conductive foam, a conductive coating is sprayed on a conductive foam base material, continuous production is achieved, the breadth and length of products are increased, and the application range of the products is extended.

The invention relates to a protective helmet for protecting the head of a user, characterized in that it comprises an enveloping structure consisting of an inner component (1), at least one intermediate component (2) and an outer base component (3) having an annular configuration, where said components (1, 2, 3) are coupled one inside the other, can move in relation to each other from a retracted position to a deployed position and vice versa, and create a space, in a deployed position, corresponding to the part of the user's head that is inside the helmet.

The invention discloses an embedded micro-pinpoint electrode and a manufacturing method thereof, which relates to the technical field of micro-electronic mechanical systems and embedded micro-electrodes. The method comprises the following steps: A: manufacturing a metal electrode layer of a parylene-metal alloy-parylene structure on a silicon piece (2) coated with an aluminum film (1), wherein the metal electrode layer comprises an exciting point (3), an interconnection line (4) and a lead connecting line (5); B: manufacturing a nickel metal or nickel alloy mechanical supporting layer by photoetching and plating, wherein the mechanical supporting layer comprises a nickel metal or nickel alloy micro pinpoint (6) and a base supporting body of the lead connecting point (7); C: eroding an aluminum film victimization layer by a wetting method; bonding a dry film (8) on a front surface; etching an oxygen plasma on a back surface until an exciting point and a lead connecting point are exposed; and D: eroding the dry file by the wetting method and cleaning by using deionized water to obtain the micro-pinpoint electrode. The invention has the characteristics of high mechanical performance,good biological compatibility, convenient embedding, light damage to tissue, accurate and controllable size, high sensibility and high reliability.

The present invention provides a composite humidity sensitive material used for a capacitive humidity sensor and a sensor preparation method, the formula of the composite humidity sensitive material is as follows: mixing titanium oxide or barium titanate with barium strontium titanate in the mass ratio of 1:1-1:3 to obtain an initial functional ceramic material, mixing polyamide or polytetrafluoroethylene with the initial functional ceramic material in the mass ratio of 0.3wt%-0.5wt% to obtain a mixture; and mixing an inert metal with the mixture in the mass ratio of 15wt%-25wt%. A composite humidity sensitive film is prepared by an aerosol deposition technology from the composite humidity sensitive material, and the capacitive humidity sensor is prepared from the film by a semiconductor processing technology. The sensor has high precision, high stability, heat resistance, pollution prevention and high reliability.

The invention provides a preparation method of a fullerene/metal composite film on a metal surface. The preparation method is characterized by comprising the following steps of: (1) surface pretreatment of a substrate material: cleaning, acid-cleaning and activating a metal surface; (2) preparation of an electrophoresis solution, dispersing fullerene in tetrahydrofuran, ultrasonically oscillating, filtering, reducing and regulating PH value to be 8-12; (3) preparation of a fullerene film on the metal surface with an electrophoresis method; (4) preparation of electroplating liquid: preparing the electroplating liquid containing Ni, Sn, Zn, Cu, Cr, and the like; (5) preparation of a fullerene/metal compositecoating on a metal plate, which is provided with the fullerene film and obtained from the step (3), by adopting an electroplating method; and (6) heating. The method provided by the invention can be used for modifying the metal surface; and particularly a novel surface coating film metal material can be derived and a brand-new nano composite plating metal product can be developed by utilizing the thermal diffusion characteristic of the fullerene material.

The invention relates to the technical field of optical glass processing, in particular to a processing method of K9 ultrathin glass, which comprises the following steps: cutting a thick and heavy K9glass brick raw material to obtain a K9 glass sheet as a semi-finished product for later use; then, subjecting the obtained K9 glass sheet to polishing and thinning for multiple times to obtain K9 ultrathin glass, wherein the process specifically comprises the steps of physical thinning, attaching and fixing, chemical thinning, cleaning, mechanical thinning and peptizing; cutting and inspecting afinished product; and finally, packaging and storing the finally obtained product. The advantages of physical thinning, chemical thinning and mechanical thinning are brought into full play, the thinning speed is high, the thinning thickness is controllable, and the K9 ultrathin glass with the ideal thickness and the flat and smooth surface is obtained; and by the adoption of a top-spraying waterfall flow type chemical thinning method, an etching solution can be recycled, energy and cost are saved, the automation degree of industrial production is improved, and application and popularization are facilitated.

The invention provides a graphene-based hot-electron transistor based on ALD (atomic layer deposition) and a preparation method of the graphene-based hot-electron transistor. The preparation method comprises the following steps: (1) providing heavy doping N-type Si and growing emitter region electrodes at both sides of the surface of the Si; (2) carrying out thermal oxidation on the surface of the heavy doping N-type Si to form a first potential barrier; (3) forming a single graphitic layer on the surface of the first potential barrier as a base region and forming base region electrodes at both sides of the surface of the single graphitic layer; and (4) forming a second potential barrier between the base region electrodes on the surface of single-layer graphene by utilizing an ALD process and forming a metal collector region on the surface of the second potential barrier. By adopting the preparation method, the performance of a hot-electron device is relatively good by preparing the single graphene layer as the base region, utilizing the performance of quasi ballistic transport of the graphene and combining tunneling characters of hot-electron, and the potential barrier of high-k metallic oxide grown on the surface of the single-layer graphene by utilizing the ALD is controllable in thickness, free of pinhole and good in quality. In addition, the preparation method provided by the invention is accurate in preparation, simple and high in yield.

The invention provides a full-inorganic high-temperature-resistant insulating bonding method for an iron-based metal soft magnetic composite material, and relates to the technical field of iron-basedmetal soft magnetic composite materials. The method comprises the following steps: 1) sieving iron-based magnetic powder to carry out size grading; (2) compounding silica sol and alumina sol, carryingout insulation coating on the prepared magnetic powder and drying; and 3) mixing the dried magnetic powder with a binder and a filler and then drying; and adding demolding powder, carrying out dry pressing molding, and carrying out thermal treatment under the protection of nitrogen to obtain the magnetic powder core. The mixed sol is used for coating the magnetic powder, the coating layer is uniform, the thickness is controllable, the thermal stability is high, the resistivity is high, the loss is low, and the magnetic property and the mechanical property are excellent; and the mixed sol is adopted to insulate and coat the magnetic powder so that the operability is high and batch production is facilitated.

The invention discloses a wet chemical etching method for preparing large-area and flexible ultra-thin monocrystalline silicon wafers, and belongs to the field of semiconductor technology. According to the method, acetone, anhydrous ethanol, deionized water and hydrofluoric acid are adopted to treat a N(100) double-side-polished monocrystalline silicon wafer in advance, so that the surface of the silicon surface is cleaned. Potassium hydroxide, isopropanol and deionized water are uniformly mixed to prepare a reducer and the reducer is preheated in a water-bath. After that, the silicon wafer is well fixed and dipped in the reducer by a clamp. In this way, an ultra-thin wafer of a desired thickness can be obtained through controlling the reaction time and the reaction temperature, The surface of the silicon wafer is bright, flat, smooth and free of any obvious thinning defect, and appears the mirror-surface result. According to the technical scheme of the invention, the thinning process of silicon wafers is simplified by adopting the single-step method, and the characteristics of the wet etching technique in the low-temperature and normal-pressure condition are maintained. Silicon wafers with the thickness thereof smaller than 10 mm are obtained for the first time. Meanwhile, the application range of the wet silicon etching technique is expanded. Therefore, the method provides a novel idea and a novel technical means for the thinning process of silicon wafers.

The present invention belongs to the field of polymer composites and functional materials, and relates to a gel diaphragm for a new rare-earth power supply and a preparation method thereof. After an Asolution and a B solution are mixed, a mixture is placed into a bucket for vacuum gel forming. Then, gel is cut into sheets and is heat-sealed with a diaphragm to obtain the gel diaphragm for a new rare-earth power supply, wherein the A solution is obtained by mixing magnesium lithium silicate, CMC and H2O, and the B solution is obtained by mixing a polymer and water. The gel diaphragm of the present invention is prepared under the combination of inorganic thixotropic gel and organic gel, is controllable in thickness and resistant to carbonization, and has high mechanical strength. The problem that a gel diaphragm with high mechanical strength cannot be prepared under conventional process treatment in the prior art is solved. The gel diaphragm of the present invention has the features ofhigh conductivity and low interfacial energy of a liquid electrolyte, and also has the advantage of good long-range stability of a solid electrolyte. The present invention also provides a preparationmethod of the gel diaphragm. The preparation method can realize industrialization and has good reproducibility. A production process of the preparation method is non-toxic, pollution-free and environmentally friendly.

The invention discloses a preparation method of a positive electrode material of a lithium ion battery and a product thereof, belonging to the technical field of electrochemical batteries. The method comprises the following steps: mixing a manganese-based positive electrode material of the lithium ion battery and a modification body, performing granulating, and conducting sintering to obtain the positive electrode material of the lithium ion battery. According to the invention, a high-electron conductor or a high-ion conductor is used as a modifier for uniformly modifying the surface of the positive electrode material by adopting a solid-phase fusion technology, and the thickness of a modification layer can be controlled by adjusting a mass ratio of the manganese-based positive electrode material of the lithium ion battery to the modification body; the surface of the modified positive electrode material of the lithium ion battery is more stable, dissolution of transition metal ions and generation of cracks between particles in the circulation process are slowed down, and the specific capacity and the circulation stability of the positive electrode material of the lithium ion battery are effectively improved; and the preparation method disclosed by the invention is friendly to environment, free of pollution and low in process cost.