503results about How to "Flawless" patented technology

The invention relates to composition and a preparation method of silicon solar battery electrode slurry. The silicon solar battery electrode slurry comprises silicon solar battery sunny slope grid electrode silver slurry, back surface field silver-aluminium slurry and back surface field aluminium slurry which are used for preparing an ohm contact layer containing silicon alloy powder. In the invention, silver powder, aluminium powder, a simple substance element and the silicon alloy powder are used as raw materials, and an organic bond and an inorganic bond are used as accessories, and after the raw materials and the accessories are evenly mixed, a three-roller rolling mill is utilized to roll the mixture into the silicon solar battery electrode slurry of which the fineness is 20.0-25.0mum and the viscosity is 20000-40000mpa.s.

The invention discloses ceramic glaze prepared from the following components in weight percentages: 40 to 80% of SiO2, 8 to 20% of Al2O3, 0 to 5% of B2O3, 3 to 13% of CaO, 1 to 6% of MgO, 1 to 10% of BaO, 0 to 5% of ZnO, 1 to 4% of K2O, 1 to 4% of Na2O, 5 to 13% of ZrO2, 0 to 0.5% of Fe2O3, and 0 to 0.5% of TiO2. The invention also discloses a preparation method of the ceramic glaze. In the preparation method of the invention, some raw materials in the glaze formula are calcined at high temperature in advance, which helps to reduce defects such as bubbles and pinholes on the glaze and improves the quality of a product, meanwhile, the melting temperature of the glaze is properly reduced, the fluidity of a glaze melt at the high temperature is increased, and a flat, fine and smooth surface can be easily obtained. By adoption of the preparation method of the invention, the matte glaze with good hand feel and low glossiness can be obtained, and the high gloss glaze with a smooth surface and without pinholes or bubbles can also be obtained, so as to obtain the ceramic product with more excellent performance.

The invention provides a preparation method of a porous ceramic-metal composite film material. The method comprises steps of: using ceramic as a rigid outer mold; preparing a ceramic coating in the inner surface of the rigid outer mold; adding a metal powder into a hollow cavity between the rigid outer mold and an elastic inner mold; sealing; forming by cold isostatic pressure; sintering a formed porous ceramic-metal composite film blank together with the rigid outer mold; and separating a sintering body from the rigid outer mold. Through improvement on the preparation process, the ceramic coating and the metal powder subjected to isostatic pressure forming are sintered under high temperature condition, so that a porous metal substrate and the ceramic film layer expand synchronously under effect of compressive stress of the rigid outer mold during the sintering. The prepared porous ceramic composite film material has strong adhesion, high strength, smooth, flat and flawless film layer, and improved practicability.

This invention discloses a Cu alloy contact wire of high strength and high conductivity used in high speed railways and its preparation method, in which, the contact wire is taken Cu as the matrix to be added with Ag: 0-0.15% and Cr: 0.20-0.72%. The preparation method includes: applying a hot-rolling technology to large area Cu alloys and level conticasting technology to produce large length wires or a rod ingot is solutionized then to be rolled, aged and rolled.

The invention provides a manufacturing method of a large size thin-walled titanium alloy cylindrical part, comprising the steps of: (1) raw material powder selection; (2) powder loading and encapsulation; (3) hot isostatic pressing; and (4) cylindrical part blank processing. The invention also provides a cylindrical mould used for manufacturing the large size thin-walled titanium alloy cylindrical part, comprising a cylindrical outer sheath and a cylindrical inner sheath. A cavity for loading titanium alloy powder is formed by the outer sheath and the inner sheath, and the inner sheath is internally provided with a cylindrical shaped mould; an upper sheath cover and a lower sheath cover for encapsulating the cavity are respectively fixed at the top end and the bottom end of the cavity for loading titanium alloy powder; and the upper sheath cover is also provided with a gas removing pipe. Different from a plurality of traditional manufacturing methods, the invention can simultaneously meet the requirements of high performance, no defect, large size thin-wall, large length-diameter ratio, high precision, low cost, and the like.

A SMC sheet with high surface quality and luster is composed of both surficial PE films and a core material prepared from glass fibers through immersing them in the resin paste which is proportionally from unsaturated polyester resin, low-shrinkage additive, internal demoulding agent, calcium carbonate, styrene, trigger and magnesium oxide.

The invention provides a graphene field effect transistor terahertz wave modulator and a manufacture method thereof and aims to increase the modulating speed and depth of the graphene field effect transistor terahertz wave modulator. The graphene field effect transistor terahertz wave modulator comprises a semiconductor substrate, and a medium layer, a graphene film and source and drain electrodes which are arranged on the substrate, and an annular grating electrode which is arranged on the back of the substrate. The terahertz wave modulator is characterized in that the medium layer is an Al2O3 layer, and the thickness ranges from 5 to 100nm; the Al2O3 is deposited by the ALD (atomic layer deposition) method, and the Al2O3 is high in evenness, is free of defects and pores and has better voltage resistance; the leakage current is reduced greatly. The modulating speed of the terahertz wave modulator can be 178 KHz, the corresponded modulating depth is larger than 22%, and the modulating speed and depth are increased significantly; the terahertz wave modulator can be widely applied to the fields of terahertz wave communication systems, terahertz wave detection and terahertz wave imaging.

The invention belongs to the technical field of metal surface cleaning treatment, and more particularly relates to an environmental-protection type multifunctional efficient acid washing acid inhibition corrosion inhibitor, which is formed by mainly compounding 2-6 parts of a surfactant, 8-15 parts of a corrosion inhibitor, 0.5-1 part of a penetrating agent, 2-4 parts of an acid washing accelerating agent, 74-87.5 parts of water, and other components, wherein the product achieves the optimal mist inhibition corrosion inhibition effect in the acid washing through the synergy effect of various components. The corrosion inhibitor of the present invention has the following beneficial effects that: (1) the rust removing is fast, the rust removing speed is significantly increased with the additions of the penetrating agent and the accelerating agent, and the rust can be completely removed within 5-30 min when the addition amount is 2%; (2) the mist inhibition property is good, and the good mist inhibition effects are provided for hydrofluoric acid, nitric acid, and the like; and (3) the corrosion inhibition is good .

The invention relates to an injection-molded reactive sintered SiC ceramic material and a preparation method thereof. The ceramic material is prepared from the following raw materials in percentage by mass: 55-80% of silicon carbide, 3-10% of carbon powder, 1-3% of a surfactant, 6-20% of a lubricant and 6-20% of a binder through the steps of mixing, molding, degreasing and sintering, wherein the sum of the amount of components is 100%. The reactive sintered SiC ceramic molded by using the method provided by the invention has the advantages of uniform density of a billet and high dimensional precision, and can be used for manufacturing high-quality ceramic parts with complex structures and no defects. As for the prepared reactive sintered SiC ceramic material, the bulk density is more than 2.7g/cm<3>, and the three-point bending strength can be above 260MPa.

The invention discloses a high quality perovskite thin film, a solar cell and a preparation method thereof. The method uses solvent soaking to assist crystallization, and uses a mixed steam of water and organic solvents to assist baking so as to prepare the high quality organic and inorganic composite perovskite thin film. The high quality perovskite thin film prepared by the method is good in crystallinity, and uniform, smooth and with no defects and holes in a wide range. The preparation method provided by the invention is simple in operation, strong in operability and controllability, and very suitable for preparation of large area perovskite thin film solar cell, therefore, the preparation method has a great potential application value in the field of solar cell or other scientific fields.

The invention relates to a coating, in particular to an infrared separating slurry which is prepared from the following raw materials by weight percentages: 20 to 25 weight percentages of nanometer ATO powder or nanometer ITO powder, 20 to 30 weight percentages of alcohol, 15 to 25 weight percentages of glycol, 20 to 30 weight percentages of isopropanol, 15 to 25 weight percentages of water and 2 to 5 weight percentages of a dispersing agent SDBS. The nanometer silicon dioxide sol prepared by the sol-gel method of the infrared separating coating prepared from the slurry and used for tempered glass is different from the traditional organic resin, the coated film layer has high hardness, and after being processed at a high temperature with the glass, the coated film layer has the hardness of 5 H to 6H, aging resistance and twenty-year durability. The coating has very thin film layer, guarantees the transparency and high penetration rate of visual light of the glass, is convenient for transportation and the construction are convenient, greatly reducesthe cost.

The invention discloses a large-scale locomotive connecting rod forging technology which comprises the steps of blanking, lathing, anti-decarburization coating application, blank heating, surface oxidation layer removal, roll forging of blanks, pre-forging, finish forging, trimming, punching and calibration, anti-decarburization coating application and heat treatment. According to the large-scale locomotive connecting rod forging technology, forming can be achieved through one time of heating only. Compared with the traditional technology that heating needs to be conducted twice or more, the technology has the advantages that surface oxidation and decarburization of a connecting rod are effectively reduced, the mechanical performance of the connecting rod is guaranteed, and time and energy resources are saved. Due to the adoption of roll forging of blanks, speed is high, labor is saved, the consistency of manufactured blanks is high, and time and labor are saved during forging in later periods. Due to the fact that high-temperature-resistant and oxidation-resistant anti-decarburization coating application is conducted twice during the whole technology, the decarburized layer on the surface of a final forged piece is thinner than 0.3 mm, and product quality is improved effectively. Due to the fact that the connecting rod forged piece is vertically hoisted for heat treatment, bending deformation of the forged piece is effectively prevented during heat treatment.

The invention discloses a molding method and a molding apparatus of a composite material toughened thin rod. The molding method comprises the steps that: first, a resin-impregnated fiber bundle penetrates a primary molding mold, such that fiber bundle primary molding body with a shape same as that of an axial primary molding mold through hole mold cavity cross-section is produced; second, the primary molding body fiber bundle is heated for a first time, wherein the temperature is an initial reaction temperature of the resin; third, the fiber bundle is delivered into a second heating process, wherein the heating temperature is the resin gelatinization temperature; then, the fiber bundle is delivered into a molding mold, wherein the middle part of the molding mold is an equal-cross-section axial molding through hole mold cavity; and finally, the fiber bundle discharged from the molding mold is delivered into a third heating process, wherein the heating temperature is controlled at a value between the exothermic peak temperature of the resin and the reaction stopping temperature of the resin. Therefore, the thin rod reaches a curing degree above 70%, such that the resin-containing fiber bundle is solidified into the thin rod product. The heating durations in the three heating processes are determined according to the dimension of the thin rod and the thermal performance of the resin.

The invention discloses a composite porous electrode for a sulfuric acid system and a preparation method thereof. From inside to outside, the electrode is sequentially provided with an enhanced metal substrate, a Pb or Pb-based alloy (Pb-Me') transition layer and a Pb or Pb-based alloy (Pb-Me'') porous layer. The preparation method for the electrode comprises the following steps of: preparing the transition layer by performing chemical plating and metal melt immersion plating in the molten salts of chlorides or directly by performing the metal melt immersion plating, and preparing the porous layer by adopting an infiltration method or an antigravity infiltration method. Due to the adoption of the transition layer, the enhanced metal substrate and the porous layer in the composite porous electrode are combined more firmly, even electrolyte cannot permeate into and corrode the substrate through the porous layer, and the electrode has longer service life. The method of the invention has the advantages of preparing the composite porous electrode with firm combination among composite layers, strong strength, high corrosion resistance and long service life, and solving the long-term problems of short service life and weak strength of the electrode in the sulfuric acid system, along with simplicity and rational structure.

The invention discloses quasi-TC4 titanium alloy for laser additive manufacturing application. The quasi-TC4 titanium alloy for laser additive manufacturing application comprises, by mass percentage,1%-2% of Mo, 5.5%-6.8% of Al, 3.5%-4.5% of V and the balance Ti and inevitable impurities. The quasi-TC4 titanium alloy is obtained in the mode that dried pre-alloyed powder or dried element mixed powder of the quasi-TC4 titanium alloy are manufactured according to a laser additive manufacturing method. The Mo is added to the quasi-TC4 titanium alloy, the synergistic effects that intracrystallinealpha battens are thinned, and the alpha-phase volume fraction is increased are effectively achieved under the action of the heat cycle of laser additive manufacturing, and the strength and the plasticity of the quasi-TC4 titanium alloy are improved. According to the quasi-TC4 titanium alloy for laser additive manufacturing application, the manufacturing technology is simple, the operation response is fast, machining is easy, crucibles or other electrode materials are not required in the manufacturing process, and alloy elements are prevented from being contaminated.

The invention relates to a friction stir welding method of a medium plate AZ AZ1 magnesium alloy, belongs to the technical field of welding process used in material processing projects, and particularly provides a friction stir welding method of a 10 to 20-millimeter-thick AZ31 magnesium alloy. The welding inclined angle of a stirring head is 2.5 to 3 DEG, the pressing depth is 0.1 to 0.2 millimeter, the rotation speed is 600 to 1,400r/min, and the welding speed is 100 to 200 mm/min; the shaft shoulder of the stirring head is concave and a stirring pin is frustum-shaped and spiral; the diameter of the shaft shoulder of the stirring head is 28 to 35 millimeters; the diameter of the root part of the stirring pin is 10.3 to 15.1 millimeters, and the diameter of the end part of the stirring pin is 7.8 to 9.3 millimeters; and the length of the stirring pin is 9.6 to 19.5 millimeter. By selecting reasonable welding parameters, the obtained joint is formed elegantly, the maximum tensile strength is up to 94.7 percent of that of a parent metal, and the well welding of the medium plate AZ AZ1 magnesium alloy.

The invention provides a stripping liquid composition of a photoresist, comprising inorganic alkali, organic alkali, water-soluble organic solvent, anti-corrosion agent and water. The mass proportion rate between the inorganic alkali and the organic alkali is 1: 30 to 30: 1. The stripping liquid of the invention is specifically suitable for stripping a dry film of which the thickness is more than 100 mum; and the thick dry film is totally stripped under the low temperature (45-55 DEG C) and the short time (less than 30 min).

A silicone rubber pipe with great internal diameter and locking needle structure is composed of internal silicone rubber layer, reinforcing layer with locking needle structure and external silicone rubber layer. Its preparing process includes such steps as preparing pipe blank through extruding out and weaving, and sulfurizing. Its advantages are high adhesion between layers and high pressure tolerance (more than 0.4 MPa).

The invention relates to a tungsten/steel diffusion connection method based on tungsten surface gradient alloying, belonging to the technical field of composite material preparation. In the present invention, the nano-scale pre-alloyed mixed powder with a mass ratio of Ni and Fe of 7:3 is used as a raw material, and the surface of the tungsten substrate is subjected to gradient alloying treatment by high-temperature cladding and vacuum hot-pressing composite technology, and then the vacuum of tungsten and steel is carried out. Diffuse connection. The present invention forms a gradient alloy layer on the surface of the tungsten substrate through the configuration of nickel and iron components, vacuum hot pressing, high temperature cladding and vacuum diffusion and other process or parameter optimization, and obtains no defects at the interface and thermal fatigue performance Good, high interface stability of tungsten / steel composite structural parts. It can be used in the preparation of helium-cooled divertor components in magnetic confinement nuclear fusion experimental devices.

The invention belongs to the technical field of diamond preparation and discloses a method and a system for splicing and growing single-crystal diamonds. The method comprises the following steps: putting a seed crystal into a plasma CVD equipment cavity, sucking off ultimate pressure, introducing hydrogen, inputting energy, generating power discharge, and adjusting the temperature of the seed crystal; introducing a methane (or carbon-containing gases such as acetone and carbon dioxide) gas, growing the seed crystal for 1-100 hours at 800-1000 DEG C, and the like. According to the method, single-crystal diamonds are grown by using a CVD method through spicing growth, the purpose that the single-crystal diamonds is grown in a large scale is achieved, synthesis sizes directly depend on sizesof the seed crystals since conventional growth of single-crystal diamonds can be only longitudinally amplified on original seed crystals, two single-crystal diamond flakes of a same size and approximate thicknesses are fixed and spliced and grown simultaneously, then a large-size single-crystal diamond is grown, and bottle neck problems are solved.

The invention relates to a laser welding method of nickel titanium shape memory alloy and copper alloy in the technical field of materials, machines, electrical engineering and the like, belongs to the technical field of dissimilar material connecting. According to the method, the functions of a sensor, an executor and the like are achieved through the high conductivity of copper and the superelasticity or shape memory character of nickel titanium alloy. The method comprises the process steps that after the to-be-welded face of a nickel titanium shape memory alloy and copper alloy wire or belt or plate is polished and washed, the lap-joint or butt-joint mode is adopted, a designed clamp is utilized, the nickel titanium shape memory alloy part or the connecting position is heated through a Nd:YAG laser device, and a high-strength, defect-free and low-impedance dissimilar material welding connector can be obtained by adjusting laser and heat treatment process parameters.