57results about How to "Flexible thickness control" patented technology

This invention discloses a method for preparing carbon nanotube-metal composite film structure by electrochemical-combined deposition. The method comprises: preparing electrophorectic solution of stably dispersed carbon nanotubes after purification, shearing and dispersion, applying a voltage onto the electrodes to deposit a uniform layer of carbon nanotube film onto the substrate, placing the film in the electroplating solution, and forming a metal conductive film within the intertube microstructure by electrochemical method. The electrophorectic solution comprises carbon nanotubes, electrophorectic dispersing agent and charge auxiliary salt for charge decoration. This invention reduces the contact resistance between metal and carbon nanotubes, thus can fulfill the excellent electricity and heat conductivity of carbon nanotubes, and can improve the bonding strength of carbon nanotubes and conductive substrate. This invention has good compatibility with fine processing, and has such advantages as simple process, large scale preparation, controllable operation, and high efficiency, and low cost.

The invention discloses a composite white light LED which comprises a substrate, an LED chip and a transparent casing. The bottom of the LED chip is fixed to the surface of the substrate. The upper part of the substrate is sleeved by a transparent shell. The upper part of the LED chip is covered with phosphor colloid. The inner surface of the transparent shell is attached with a quantum dot film. An air gap is between the quantum dot film and the phosphor colloid. The invention also discloses a preparation method of the composite white light LED. Since the air gap is between the phosphor colloid and a quantum dot shell, the air gap can prevent the absorption effect between quantum dot emitting light and fluorescent powder emitting light, the quantum dot film and a fluorescent powder layer are curved surface topographies, the removal of light energy is facilitated, and thus the light emitting efficiency of the composite white light LED is improved significantly. The operation method is simple, the cost is low, the thicknesses, topographies and compositions of the phosphor colloid and the quantum dot film can be flexibly controlled, thus the composite white light LED with high color performance is obtained, and the composite white light LED is suitable for mass production.

The invention relates to an epoxy resin fiber reinforced concrete for repair and preparation and application methods thereof. The epoxy resin fiber reinforced concrete is prepared from the following raw materials in percentage by weight: 55-70% of refined quartz sands, 33-17% of epoxy resin, 11-9% of curing agent and 1-4% of basalt fiber chopped strands. The preparation method comprises the following the following steps: by using the refined quartz sands as aggregates and epoxy resin as a gel material, adding the basalt fiber chopped strands; and mixing according to an appointed proportion. The product provided by the invention is extremely high in viscosity, can be well combined with defected concrete of a base layer and is not easy to peel and bulge. The strength can reach the strength grade of concrete C50. The concrete is simple to manufacture, can be prepared on site and needs not to be heated on site. Epoxy resin needs not to be diluted, and the construction steps are saved and the concrete is convenient to use while no diluents are introduced. The product is short in curing time, and comes into use in 24 hours after repair. The concrete is strong in adaptability, can be suitable for repairing defects of thick and thin layers of a terrace at the same time and can be used for repairing various defects of terrace such as pits formed by collision or high-low difference due to differential settlement of the concrete terrace.

The invention provides a process for preparing ultra-thin brazing fillers by chemical plating and electric plating, and relates to the field of welding material preparation. The process comprises the concrete processes that a copper foil with the thickness being 0.002 to 0.010 mm is selected to be used as a base body, chemical silver plating, electric tin plating and diffusion processing are sequentially carried out, the ultra-thin brazing fillers are prepared, and the prepared brazing fillers comprise the following major chemical ingredients in percentage by mass: 60 to 72 percent of silver, 1 to 8 percent of tin and 26 to 31 percent of copper. The chemical plating and electric plating method is used, and the area and the thickness of the brazing fillers and the contents of each ingredient can be flexibly controlled. Compared with the existing fast solidification method, the process provided by the invention has the advantages that the ultra-thin brazing fillers with the width being higher than 100mm and the thickness being lower than 0.035 mm can be produced, complicated production equipment is not needed, and the production cost is lower.

The invention discloses a multifunctional lithium-sulfur battery diaphragm which is characterized by comprising a basic diaphragm and a coating layer, wherein the coating layer comprises graphene oxide and a main body material, and the main body material is one of boron nitride, aluminum carbonitride or molybdenum disulfide. The invention further discloses a preparation method and application of the multifunctional lithium-sulfur battery diaphragm. According to the multifunctional lithium-sulfur battery diaphragm disclosed by the invention, the graphene oxide is adopted to induce the main bodymaterial, so that the dispersity problem of the nano materials is solved, the two nano materials are compounded in order, shuttling of polysulfide is more effectively inhibited, and the mechanical strength and heat resistance of the diaphragm are synergistically enhanced. According to the preparation method of the diaphragm, a solvent evaporation induced self-assembly means is adopted, so that ordered compounding of two 2D nano materials is realized, the coating thickness can be flexibly controlled, and large-scale production is realized.

The invention discloses a preparation method of a multifunctional nano-crystalline cellulose composite separation filter membrane and application thereof. The method comprises the following steps: adding attapulgite into nano-crystalline cellulose suspension to be mixed, and preparing nano cellulose crystal/attapulgite suspension. An ordinary filter membrane serves as a substrate, and the suspension is subjected to vacuum filtration to form the filter membrane. According to the filter membrane, the pore size, thickness and water flux of the membrane can be controlled by regulating the usage amount of cellulose in unit area. According to the wettability characteristic that the filter membrane is super-hydrophilic and is super-oleophobic in oil, application of the filter membrane in aspectssuch as oil-water emulsion, heavy metals and dye separation is realized. The filter membrane disclosed by the invention is simple, feasible, low in cost and non-toxic.

The invention discloses a method for preparing a PVDF (Polyvinylidene Fluoride) lithium ion battery diaphragm by electrostatic spinning. The method comprises the following steps: firstly, preparing polyvinylidene fluoride glacial acetic acid solution with the concentration of 17-20 percent by weight; secondly, stirring the polyvinylidene fluoride glacial acetic acid solution to be uniform; thirdly, completely cooling the polyvinylidene fluoride glacial acetic acid solution at room temperature of 25DEG C to obtain spinning solution; fourthly, taking a proper amount of spinning solution by using an injector, placing the injector on an injection pump, connecting a needle head, clamping an anode of a high voltage static generator on the needle head, enabling a cathode of the high voltage static generator to be connected with a receiving screen, and laying tin foil paper on rollers; fifthly, setting the spinning speed, adjusting the spinning voltage and the spinning distance and then performing static spinning; after the spinning is ended, taking off the tin foil paper from the rollers to obtain the lithium ion battery diaphragm. The method disclosed by the invention has the advantages of simple process, low energy consumption, low production cost and high performances of products; the pore size and the film thickness can be flexibly controlled, the improvement on both the ionic transparency of the diaphragm and the cycle performance of the battery is facilitated, and a good marker prospect is obtained.

The invention belongs to the technical field of high heat conduction media, and discloses a method for manufacturing a long-term efficient anti-reflection micro-nano structure on a copper surface. The method comprises the following steps: polishing red copper and/or a copper elementary substance sample; placing the polished sample on a laser processing platform, performing preset path scanning on the sample by using pulse laser to obtain a sample surface with a micro-nano composite structure, and packaging the sample into a vacuum bag; and placing the obtained sample in a sample furnace of magnetron sputtering equipment, and growing a layer of silicon dioxide protective film on the surface of the micro-nano structure to obtain the long-term efficient anti-reflection micro-nano structure. According to the method, the micro-nano structure with the anti-reflection characteristic is prepared on the copper surface, and then a layer of inert film is grown on the surface of the micro-nano structure for protection through a film coating method, so that the micro-nano structure has the long-term efficient anti-reflection function characteristic; and the thickness of the silicon dioxide protection layer is flexibly controlled by controlling the coating time of magnetron sputtering, the strength performance of the protection layer is improved, and the problem of failure of the anti-reflection structure on the copper surface is effectively solved.

The invention discloses a carbon-ceramic brake disc with a wear-resistant and anti-oxidation coating and a preparation method of the carbon-ceramic brake disc. The preparation method comprises the following steps that grooving treatment is conducted on the upper surface and the lower surface of a carbon/carbon composite material disc body, then coating slurry is brushed in a groove in the upper surface till the groove in the upper surface is filled with the coating slurry, and then the carbon/carbon composite material disc body is turned over, the groove in the lower surface is coated with the coating slurry till the groove in the lower surface is filled with the coating slurry, thus the carbon/carbon composite material disc body containing the coating slurry is obtained, curing, carbonization and ceramization treatment are sequentially conducted, and the carbon-ceramic brake disc is obtained. The preparation process of the wear-resistant and oxidation-resistant coating is simple, large-scale industrial mass production is easy to realize, the coating is bright and smooth in appearance, the bonding strength between the coating and the disc body is high, the size precision is easy to accurately control, and the problem that the size is easy to control inaccurately when the ceramic brake disc is subjected to machining treatment can be effectively solved.

The invention relates to a niobium alloy surface Ni-Cr oxidation-resistant coating and its preparation method, and belongs to the field of a metal surface coating material and its preparation technology. The coating provided by the invention is composed of 30-40 wt% of Cr, 5-10 wt% of a niobium alloy and the balance Ni. The preparation method comprises the following steps: firstly, electroplating Ni on the surface of the niobium alloy; then, electroplating Cr; and finally, carrying out surface alloying by pulse YAG laser so as to obtain a Ni-Cr coating which is in complete metallurgical bonding to a matrix. By controlling thickness of the electroplated Ni layer and the electroplated Cr layer as well as the pulse YAG laser surface alloying technology, ingredients and thickness of the coating can be flexibly controlled. As content of Cr in the coating reaches 30-40 wt%, the coating has excellent resistance to high temperature oxidation.

The invention relates to a cashe-on-board (COB) technology-based integrated light emitting diode (LED) packing method, which comprises the following steps that: 1. thickness of a mould and diameter of a reserved hole are adjusted; 2. the reserved hole on the mould is aligned to an LED chip which is well fixed on an aluminum circuit board, and the mould covers the aluminum circuit board; 3. after fluorescent glue is sprayed on the aluminum circuit board, the aluminum circuit board is baked, then the mould is removed after the baking so as to obtain an LED packing unit. The method has followinng beneficial effects that: the shape, position, thickness and quantity of the fluorescent flue can be adjusted by adjusting the thickness of a silicone board and the diameter of the reserved hole, so the LED integrated packing procedures can be simplified, the heat resistance and the working temperature of the LED chip can be reduced, the shape, position, thickness and quantity of the fluorescent glue can be flexible to control, the light emitting efficiency and the consistency, stability and service life of the product can be improved, the packing efficiency also can be improved, the waste can be reduced, and the product cost can be reduced. The baking temperature is set as 140 to 160 DEG C, so the packing effect is better.

The invention relates to an explosion-proof membrane, a preparation method of a membrane as well as an automobile data recorder. The explosion-proof membrane comprises an anti-scratch layer, a main membrane PET substrate layer, a metal oxide membrane layer and a mounting glue layer which are arranged from up to bottom in sequence, wherein the metal oxide membrane layer is a non-conductive membrane. The preparation method of the explosion-proof membrane comprises the following steps: preparing the non-conduction metal oxide membrane layer on the back surface of the main membrane PET substrate layer through a non-conduction vacuum evaporation coating method; coating the other side of the main membrane PET substrate layer with the mounting glue layer and coating the front surface of the main membrane PET substrate layer with the anti-scratching layer. According to the explosion-proof membrane, multiple requirements during actual usage can be met and the problems that the explosion-proof membrane is conductive, the rear view mirror function cannot be extended on the automobile data recorder and the processing technique is complicated are solved.

The invention belongs to the field of biomedical polymer materials, and discloses a preparation method and application of a bionic high-adhesion long-acting antibacterial antifogging agent. The antifogging agent is prepared by the steps that firstly, a hydrophilic bionic high-adhesion polymer is prepared, then the hydrophilic bionic high-adhesion polymer coats a surface to be treated through a solution of the hydrophilic bionic high-adhesion polymer, so as to inhibit surface fogging and bacterium breeding. A hydrophilic bionic high-adhesion polymer solution is prepared by controlling key raw materials, a flow process and the like of the antifogging agent, and the hydrophilic bionic high-adhesion polymer solution can be used as a long-acting antibacterial antifogging agent for antifogging and antibacterial treatment on the surfaces of medical goggles lenses and the like, has good biological safety, and can effectively inhibit fogging and bacterium breeding on the surfaces of the goggles.

The invention relates to a preparation method of titanium dioxide based self-cleaning glass, aiming at solving the problems in the preparation process of the self-cleaning glass that because the technology is complex, the requirement for manpower and material resources is high and the coating efficiency is low, large-area popularization is hard to realize. According to the preparation method disclosed by the invention, a simple sol-gel method is adopted for preparing TiO2 (B) crystal phase containing nano particle sol with uniform size and relatively small grains, glass is dipped into the sol,then the glass is drawn out from the TiO2 sol at the speed of 0.5cm/s-1.0cm/s, and a sample is subjected to annealing treatment at the temperature of 300-600 DEG C, thus obtaining the TiO2 based self-cleaning glass with large area and uniform membrane. The TiO2 based self-cleaning glass disclosed by the invention has relatively good organic matter catalytic degradation activity, and is very suitable for being popularized in the fields of external glass walls of buildings, windshields of automobiles and the like. The method disclosed by the invention is low in requirement for equipment, greatly reduces the production cost and is high in production efficiency, and membrane thickness can be flexibly mastered. The prepared glass has relatively high transmittance and is suitable for being applied to daily production and life.

The invention discloses a multi-step printed circuit board differential through hole processing method and a printed circuit board thereof. The problem that multi-through hole copper differentiation and a uniform copper printed circuit board are difficultly processed in the prior art is solved. According to the technical points, a first large through hole is processed in a laminate, and hole copper with the thickness of h10 is formed on the hole wall; an isolation structure is arranged around the opening of the first large through hole, so that the hole copper of the first large through hole and the surface copper of the laminate are insulated and isolated; copper reduction is carried out on the surface copper of the laminate, and then a second intermediate through hole and a third small through hole are processed; hole copper with the thickness of h20 and h30 is formed on the hole walls of the second intermediate through hole and the third small through hole; after the third small through hole is covered and plated, the hole copper of the second intermediate through hole is thickened to h21; an isolation dry film is removed for electroless copper plating, and the hole copper of the first large through hole, the second intermediate through hole and the third small through hole is thickened to the required thicknesses H1, H2 and H3 respectively; and before the third electrolesscopper plating, H1-h10=H2-h21=H3-h30. The method provided by the invention can be used for printed circuit board fabrication.

The present application relates to a method for fabricating a driving substrate, comprising S10, based on a difference between a load of all first storage capacitors of a special-shaped display driving region and a load of all second storage capacitors of a normal display driving region, obtaining a first thickness value of a dielectric layer; S20, providing a substrate, and depositing a first metal layer on the surface of the substrate; and S30, controlling film formation process parameters by a film thickness control model, and depositing a first dielectric layer and a second dielectric layer on the surface of the first metal layer to enable the thickness of the first dielectric layer to reach a first thickness value and the thickness of the second dielectric layer to reach a second thickness value, wherein the first thickness value is less than the second thickness value. By flexibly controlling the thicknesses of the first dielectric layer and the second dielectric layer, the display brightness of the special-shaped display region of the display screen and the display brightness of the normal display region of the display screen are tend to be the same.

The invention provides a molding method of a photoresist wall. A flat panel is molded by using an injection-molding technology, wherein a first lug boss and a second lug boss are formed on the front side of the flat panel, and partitioned by a groove; the front side of the flat panel is glued and laminated with a first substrate, so that the first lug boss is adhered to the first substrate; the back side of the flat panel is grinded and thinned until the bottoms of the first lug boss and the second lug boss are separated; the second lug boss left on the first substrate is removed; residues on the first lug boss are removed by cleaning, so as to form a photoresist wall structure. The molding method of the photoresist wall has the advantages that the photoresist wall structure is independently molded; compared with the traditional photoresist lithography method, the photoresist wall molded by the molding method has the advantage that the probability of unqualified components caused by pollution in the photoresist wall molding process can be greatly reduced. The material for injection molding has the properties of high rigidity, low coefficient of thermal expansion (CTE), low moisture absorption and the like, the structure strength of a photomask of the photoresist wall is improved, and the reliability problems of layering, separating and the like are effectively reduced.

The invention provides a structure of a perpendicular asymmetric ring gating metal oxide semiconductor field effect transistor (MOSFET) device and a manufacturing method thereof. The structure of the device comprises a bottom-layer n-type silicon wafer substrate 101, wherein a drain region 111 is positioned at the bottommost end of the device; a drain expansion region 106, a channel region 107 and a source region grow on the substrate 101 in an epitaxial manner; a grating oxidization layer 109 encircles the whole channel region 107; and polycrystalline silicon gratings 110 are deposited on the grating oxidization layer 109. The invention provides the structure of the perpendicular asymmetric ring gating MOSFET with a function of effectively suppressing a short channel effect and a manufacturing method of the perpendicular asymmetric ring gating MOSFET; and by the manufacturing method, the technical process can be simplified and the length of the grating and the thickness of a silicon body region can be flexibly controlled.

The invention relates to a device for feeding a glass mixture material. The device comprises a bracket, wherein the bracket is arranged at a feeding hole of a melting furnace; a push device for feeding materials is arranged on the bracket; an upper-layer feeding device and a lower-layer feeding device are connected with the bracket at the upper side of the push device; the upper-layer feeding device and the lower-layer feeding device are of a same structure and both comprise storage cabins; a feeding hole is formed in the upper side of the storage cabin; a discharge hopper corresponding to the push device is arranged on the lower side of the storage cabin; and a valve is arranged between the storage cabin and the discharge hopper. The device has the advantages that the device can be applied to a conventional glass production line, with the combination of a mixture material preheating technique, the energy consumption of the melting furnace can be effectively reduced, by adopting a layered feeding mode, an upper layer is uniformly covered by a high-moisture mixture material which is not liable to generate dust, then flying dust and flying loss of a lower-layer mixture material can be effectively prevented, corrosion of the melting furnace by the flying dust can be effectively alleviated, the thickness of material layers are flexibly controlled according to relative heights of hoppers, and the device is applicable to multiple operation working conditions.

The invention relates to a sensor, in particular to an ultrasonic sensor, a piezoelectric composite ceramic piece and a preparation method of a blank of the piezoelectric composite ceramic piece, and the preparation method comprises the following steps: S1, arranging two division bars on one surface of the piezoelectric ceramic piece at an interval; s2, the area between the two parting strips is filled with a polymer to form a polymer phase, and the polymer phase is flush with the tops of the parting strips; s3, another piezoelectric ceramic piece is attached to the top of the polymer phase, and the parting strip is located between the two corresponding adjacent piezoelectric ceramic pieces; and S4, superposing the piezoelectric ceramic pieces layer by layer to form a piezoelectric composite ceramic piece blank. According to the preparation method of the piezoelectric composite ceramic piece blank, the distance between the adjacent piezoelectric ceramic pieces is only controlled by the thickness of the parting strips and is not limited by the defects of a traditional cutting-pouring method, and the minimum thickness can be achieved. The number of bubbles in the piezoelectric composite ceramic piece blank is smaller, the manufactured piezoelectric composite ceramic piece blank is higher in quality, and the performance of an ultrasonic sensor product is better.

The invention discloses a magnetic adsorption cavity type solar particle heat absorber which comprises magnetic solid particles, a cavity frame, three particle conveying devices, a heat preservation cover and the like. Openings are formed in the four sides of the cavity frame. The particle conveying device comprises a conveyor, a particle distributor, a flow control valve, a particle thickness controller, a magnetic force generating device, a particle collector and the like. The magnetic force generating device is continuously arranged in parallel along the lower sides of the horizontal section and the vertical section of the conveying belt, and the particle collector is arranged at the tail end of the magnetic force generating device; one opening of the cavity frame allows sunlight to enter, the other three openings are respectively and completely blocked by vertical sections of conveying belts in the three particle conveying devices, and the conveying belts convey solid particles to the opening to absorb high-density sunlight energy. Magnetic solid particles are adsorbed to the conveying belt through a magnetic field of the magnetic force generating device, the conveying speed of the magnetic solid particles is flexibly controlled through the conveying belt, solar energy on the left side, the right side and the rear side in the cavity is absorbed, and the light-heat efficiency and the service reliability of the magnetic solid particles are effectively improved.

The invention discloses a preparation method of a graphene film. The method comprises the following steps: implanting carbon into the surface layer of a metal substrate by adopting an ion implantation method in an oxygen-free environment; and corroding the metal substrate with corrosive liquid after the metal substrate is cooled, thus obtaining the graphene film. The preparation method has the beneficial effects that the ion implantation method only needs to be adopted to prepare the graphene film on the surface of the metal substrate, so that short time is required and the efficiency is high; the procedure of additional heating is not needed, so that the energy consumption is low; the graphene film is formed on the surface of the metal substrate and the thickness of the graphene film can be flexibly controlled by controlling the ion implantation quantity, so that the graphene film has a big area and uniform thickness; the ion implantation method is mature in process, so that the obtained graphene film has high quality and is low in production cost.