285results about How to "Barrier contact" patented technology

The invention provides aqueous chromium-free surface treatment solution for combining color coating pretreatment and base paint coating of a galvanized plate, and belongs to the technical field of surface treatment of galvanized plates. The treatment solution comprises the following components in percentage by mass: 20 to 60 percent of waterborne resin, 0.5 to 1.5 percent of organic silane, 0.25 to 0.8 percent of inorganic corrosion inhibitor, 0.1 to 0.3 percent of sealing agent, 0.02 to 0.05 percent of stabilizing agent, and the balance of deionized water serving as a solvent. By using the surface treatment solution provided by the invention, a compact passivation film can be formed on the surface of the galvanized plate, and the total performance of the passivation film can reach or exceed the level of a chromate passivation film; because of excellent corrosion resistance and adhesive force of the surface treatment solution, a finishing paint can be directly coated on the coated paint film layer serving as the base paint of the color coated plate, so the color coating treatment process for the galvanized plate is simplified, and the reduction of the cost is favorable; and the montmorillonite with lamellar structure in the paint film is favorable for blocking oxygen and water vapor from contacting a substrate so as to effectively improve the corrosion resistance.

A compounded latex retardant for preventing coal spontaneous combustion belongs to the technical field of retardants, and comprises the following components by weight ratio: 20 to 80 polymer emulsion, 10 to 90 organic modified clay, and 0.5 to 60 retardant, as well as 1 to 50 dispersant in a concentration of 0.1 to 10wt%. The preparation method comprises the following steps: adding the clay into silane coupling agent solution; performing ultrasonic or stirring dispersion by 30mins; dissolving the dispersant into water of a certain weight ratio, and stirring under 20 to 90 DEG C to get a dispersant solution in a concentration of 0.1 to 10wt%; and adding the organic modified clay and the prepared dispersant solution into the polymer emulsion, fully stirring, adding the retardant, and stirring to achieve uniform concentration. The retardant provided by the invention can not corrode metal equipment during use, harmful gas the wastes can not be generated, no pollution is caused to coal mine environment, and adverse effects and side effects to human body are prevented. Therefore, the retardant is environmental-friendly.

The invention relates to a liquid crystal display panel and a manufacturing method thereof. The liquid crystal display panel comprises a first substrate and a second substrate oppositely arranged; liquid crystal is filled between the first substrate and the second substrate; and an outer-layer frame sealing adhesive is arranged at the periphery of a display area of the first and second substrates and is used for sealing the two substrates, wherein an inner-layer frame sealing adhesive is arranged between the edge of the display area and the outer-layer frame sealing adhesive, and is a cured frame sealing adhesive before the first substrate and the second substrate are combined. The inner-layer frame sealing adhesive is arranged between the edge of the display area and the outer-layer frame sealing adhesive, and can effectively prevent the liquid crystal from being contacted with the outer-layer frame sealing adhesive; and the inner-layer frame sealing adhesive is the cured frame sealing adhesive before the first substrate and the second substrate are combined, so the inner-layer frame sealing adhesive is difficult to react with the liquid crystal to avoid polluting the liquid crystal and further improve the quality of the liquid crystal display panel.

The present invention discloses one kind of honey powder with low hygroscopicity and its production process in food processing field. The production process includes mixing glutin, separated soybean protein, maltodextrin, beta-cyclodextrin, lecithin and honey aqua; milling in colloid mill, homogenizing in homogenizer for mixing the components homogeneously and for the supplementary material to adsorb well the fructose easy to absorb moisture; and spray drying to eliminate water in solution and form honey powder. The said process can keep the main nutritive components in honey, block the contact of honey to outside, lower the hygroscopicity of the product, ensure the storage performance of the product and increase honey products.

The invention discloses a nanometer mineral substance air purifier which takes purely natural mineral as a raw material, can effectively and simultaneously adsorb and degrade inorganic-organic poisonous and harmful gas such as formaldehyde, benzene, ammonia and the like in the air, and also can restrain or kill virus and germs in the air. The nanometer mineral substance air purifier is prepared by adopting a series of high-end technologies to process the following components in parts by weight: 70-90 parts of sepiolite, 10-30 parts of attapulgite, 1-3 parts of sodium hexametaphosphate, 1-2 parts of hydrochloric acid or sulphuric acid, 0.0001-0.001 part of polyacrylamide, 5-10 parts of surfactant, 1-5 parts of ammonium hydrogencarbonate and 5-15 parts of air accelerant treatment agent. The nanometer mineral substance air purifier can be used for replacing activated carbon of a protective equipment filter core and various household and industrial airstrainers in the prior art.

The invention discloses a phenolic resin modified ceramic diaphragm and application thereof. The diaphragm comprises porous base film, at least one side of the film is provided with a phenolic resin ceramic layer by spreading a phenolic resin ceramic slurry; at least one surface of the porous base film is coated with the ceramic layer, and the surface of the ceramic layer, the insides of pores, the insides of the pores of the porous base film and the surface which is not coated with the ceramic layer are immersed in a phenolic resin precursor solution to be subjected to the in-situ polymerization to form the phenolic resin layer. Through the mixing coating of the phenolic resin and the ceramic slurry or the in-situ polymerizing of the phenolic resin on the basis of the ceramic diaphragm, aphenolic resin ceramic mixed layer can be formed on the surface of the porous base film, the surface of the porous base film and the insides of the pores are coated with the in-situ coating phenolicresin layer, thereby improving the thermal stability of the diaphragm, the diaphragm does not shrink at 200 DEG C and still maintains strong mechanical strength, the contact of the positive and negative electrodes is effectively blocked, and the safety performance of a battery is ensured.

The invention discloses a high-temperature-resistant polymer modified ceramic diaphragm and an application thereof. The high-temperature-resistant polymer modified ceramic diaphragm comprises a porousbase membrane, and at least one surface of the porous base membrane is coated with a ceramic layer; and a high-temperature-resistant polymer layer is arranged on the surface and in the interior of pores of the ceramic layer, in the interior of pores of the porous base membrane, and on the surface not coated with the ceramic layer in an in-situ polymerization manner. The high-temperature-resistantpolymer modified ceramic diaphragm has relatively high thermal stability. Through the in-situ polymerization method of pyrrole, the thiophene and the aniline monomer, a high-temperature-resistant polymer protection layer is formed on the surface and in the interior of pores of the ceramic layer, on the surface of the porous base membrane, and in the pores in an in-situ coating manner, so that theceramic layer, the polymer layer and the base membrane form an organic integrated body; therefore, the thermal size stability of the modified ceramic diaphragm is improved, and the modified ceramic diaphragm does not contract at a high temperature of 200 DEG C; and in addition, relatively high mechanical performance is still kept, positive and negative electrode contact can be effectively obstructed, and the safety performance of the battery can be guaranteed.

Preparation and application of an antibacterial modified exosome burn wound healing-promoting biological dressing are disclosed. A raw dressing is a novel artificially modified exosome prepared by taking cell-derived exosome as a carrier of an antibacterial agent and combining with a broad-spectrum antibacterial agent; and the modified exosome is loaded into an asymmetric chitosan porous moisturizing dressing. The weight ratio of chitosan to water-absorbing molecules to the exosome to the antibacterial agent in the dressing is (40-60): (20-40): (5-20): (1-10). The dressing has a broad-spectrumantibacterial effect, a blood vessel repair promoting effect, a nerve repair promoting effect and a wound healing promoting effect. Meanwhile, the dressing has moisture retention, air permeability, barrier property, high strength and easy disclosure, and is a novel antibacterial compound dressing with a broad-spectrum antibacterial effect. The dressing is prepared through freeze-drying, has advantages of simple preparation process, low cost, outstanding treatment effect and good safety, and has remarkable medical value and industrialization potential.

The invention discloses particles containing sodium fatty acid methyl ester sulfonate and a preparation method thereof. The preparation method comprises the following steps: mixing a wrapper and 20-75 parts by weight of paste sodium fatty acid methyl ester sulfonate, granulating by a wet process, drying, and screening. The wrapper is a composition comprising the following components in parts by weight: 1-40 parts of zeolite, 1-40 parts of silicate, 1-30 parts of modified starch and 0-30 parts of bentonite. The mass percent of the sodium fatty acid methyl ester sulfonate in the particles containing sodium fatty acid methyl ester sulfonate can be up to 65%; the particles containing sodium fatty acid methyl ester sulfonate can be used as a raw material for preparing washing powder or directly used as a detergent; and the invention effectively solves the problems of poor stability, high decomposition tendency, high lumping tendency, poor low-temperature solubility and the like in the use process of sodium fatty acid methyl ester sulfonate.

The invention relates to a nanometer modified silane-siloxane waterproof agent mainly used for waterproof and anti-corrosion protection of the surface of concrete, and a preparation method thereof, belonging to the field of concrete structure protection. The method comprises the following steps: step 1, dissolving graphene in a small-molecular alcohol or ester solvent and carrying out ultrasonic dispersion for 30 to 60 min so as to form a uniformly dispersed graphene dispersion; step 2, uniformly mixing isooctyl triethoxysilane and isobutyl triethoxysilane with an ester small-molecular solvent according to a certain proportion for 15 to 45 min by using a machine so as to obtain an organosilicone dispersion; and step 3, uniformly dispersing the graphene dispersion and the organosilicone dispersion according to a ratio of 1: 3 to 1: 10 under the condition of mechanical stirring so as to obtain the nanometer modified silane-siloxane waterproof agent.

The invention provides a method for brazing porous Si3N4 ceramic and an Invar alloy, relates to a brazing method and aims to solve the technical problems that larger residual thermal stress can be formed on a ceramic and metal interface and reduces joint strength in a brazing cooling process of the Invar alloy. The method comprises the following steps: 1, Ag-Cu-Ti brazing filler metal and a binder are mixed and applied to the lower surface of the porous Si3N4 ceramic, Ag-Cu brazing filler metal and the binder are mixed and applied to the upper surface of the Invar alloy, then Cu foil is clamped between the Ag-Cu-Ti brazing filler metal and the Ag-Cu brazing filler metal, and a test piece is obtained; 2, a briquette is added to the upper surface of the test piece, and the test piece is arranged in a vacuum sintering furnace, subjected to heat preservation at 300 DEG C, subjected to heat preservation at 850-950 DEG C and then cooled. The joint strength can reach 73 MPa with adoption of the method. The invention belongs to the field of brazing.

The invention discloses a preparation method of FeSi alloy powder with high direct current superposition characteristics, and belongs to the technical field of alloy powder preparation. The FeSi alloypowder is mainly made of pure iron and metal silicon, and a small amount of manganese and chromium are added. The preparation method comprises the following steps of weighing the ingredients according to a specific proportion, carrying out non-vacuum melting to obtain the alloy melt of required components, and then atomizing to prepare alloy raw powder with an inert gas, obtaining fine powder after the raw powder is collected, screened and graded. According to the preparation method of FeSi alloy powder with high direct-current superposition characteristics, the alloy powder with uniform components and high purity can be obtained, and the powder spherical degree is high; the uniform and compact insulating layer can be easily formed after insulation coating, so that the contact of the alloy matrix is effectively blocked, and the pressed magnetic powder core has good direct-current superposition characteristics.

Provided are a water-absorbent antibacterial dressing for burn injuries and wounds and a preparation method and application thereof. The dressing is a stereoscopic reticular porous sponge, chitosan isadopted as a framework, a super absorbent polymer combined with an antibacterial agent control-released carrier is adopted as branched chains, and macromolecules or polymers of flexiblestructures areadopted as a cross-linking agent among the branched chains. The antibacterial agent control-released carrier is loaded with an antibacterial agent. The weight ratio of the chitosan to the super absorbent polymer to the antibacterial agent control-released carrier to the cross-linking agent to the antibacterial agent in the antibacterial dressing is (0.6-2):(40-60):(0.6-25):(0.1-10):(1-10). The dressing has water absorption performance, moisture retention performance, air permeability, a barrier property, a long-acting antibacterial property, a bleeding stopping function and high strength andis easy to tear off, and is a novel antibacterial compound dressing with a broad-spectrum antibacterial effect. The dressing can be prepared through a one-pot method, is simple in preparation process,low in cost, prominent in treatment effect and high in safety and has remarkable medical value and industrialization potential.

The invention discloses a sodium ion battery positive electrode material, a preparation method thereof and a sodium ion battery. The positive electrode material has a core-shell structure, whereinthecomposition of the core is NaxFeyM1-yO2, the composition of the shell is NazMnO2; 0.6 < x < = 1, 0.5 < = y < 1, and 0.44 < = z < 1; M is one or more of Mn, Ni, Ti, Cu, Sn, Mg, Co, V, Cr and Nd. The preparation method of the positive electrode material is simple in process, and the prepared positive electrode material has the advantages of being low in price, high in safety, low in battery manufacturing environment requirement and the like, and can be applied to preparation of sodium ion batteries. The shell material and the core material can generate an ingenious mutual synergistic effect, so the charge-discharge specific capacity of the positive electrode material, the cycle performance and the rate capability of the battery are improved, and particularly, the cycle stability of the battery has outstanding advantages.

The invention relates to an antioxidant coating for the surface of an aluminum oxide-silicon carbidee-carbon (ASC) brick. The antioxidant coating is aqueous paste substance formed by mixing a component A and a component B by a weight part proportion of 100:101.5-102.5, wherein the component A is powder formed by mixing 50-70 parts by weight of glaze powder, 2-5 parts by weight of alpha-AL2O3 micro-powder, 1-7 parts by weight of bentonite powder, 1-3 parts by weight of SiO2 micro-powder and 26-35 parts by weight of silicon carbide powder; the component B viscous fluid formed by dissolving 1.5-2.5 parts by weight of carboxymethyl cellulose into 100 parts by weight of water, and the glaze powder in the component A is fine powder prepared by drying and grinding an material formed by mixing, melting and quenching 40-60 parts by weight of borax, 12-18 parts by weight of quartz, 8-15 parts by weight of sodium carbonate, 12-15 parts by weight of calcite and 8-12 parts by weight of albite. After coated with the antioxidant coating, ASC bricks of the lining of a torpedo type mixed iron car has the service life prolonged at least for 50 heating numbers, which saves the refractory material.

The invention provides a slow-release pesticide granule and a preparation method thereof, which consists of active ingredient, slow-release coating and auxiliary materials. The slow-release coating consists of the following percentage contents of materials: 1 to 15 percent of water-soluble film-forming agent, 80 to 99 percent of insoluble film-forming agent and 0 to 5 percent of pore-foaming agent, and the slow-release coating accounts for 3 to 20 percent of the slow-release pesticide granule. The following method is adopted for preparation: raw granule is first prepared from the active ingredients and the auxiliary materials; the water-soluble film-forming agent, the insoluble film-forming agent and the pore-foaming agent are then dissolved into solvent, so that form-film solution is obtained; the raw granule is then put into the drum of a coating machine, and after spraying, coating and drying, the slow-release pesticide granule is obtained. The materials of the slow-release pesticide granule disclosed by the invention are easy to obtain, the process is simple, the slow-release pesticide granule is applicable to the preparation of a variety of pesticides, and the prepared product has a good slow-release effect, is safe to crops, and can be applied underground and on the ground to prevent and control harmful organisms.

The invention discloses an electric excrement guiding device which comprises an excrement guiding tube, an air bag, an excrement smashing rod, smashing blades and an excrement collector. The air bag is annularly arranged on the periphery of a top tube orifice of the excrement guiding tube and is connected with an inflation device through an inflation pipe. An excrement discharging tube orifice is formed in the tube wall on one side of the excrement guiding tube and is connected with the excrement collector through a pipe. A seal plug is arranged below the excrement discharging tube orifice in the excrement guiding tube, and the excrement smashing rod penetrates through the central portion of the seal plug along the opening direction of the excrement guiding tube. The smashing blades are arranged at the rod head end of the excrement smashing rod, and a protective cover fixedly connected with the excrement smashing rod is arranged on the periphery of the smashing blades. The electric excrement guiding device can effectively protect an intestinal tract wall during excrement smashing and reduce anorectum damage and has a very high clinical application value.

The invention discloses a composite positive electrode material for a lithium ion battery and a preparation method and application of the composite positive electrode material. The composite positiveelectrode material comprises a positive electrode material core and a halide coating layer coating the surface of the positive electrode material core. The halide comprises Li3YX6, and X is at least one of halogens. According to the halide-coated positive electrode material disclosed by the invention, through coating of the halide coating layer, the ionic conductivity and the structural stabilityof the positive electrode material are greatly improved, and the surface impedance of the material is reduced, so that the capacity, the first effect and the cycle performance of the material are improved.

The invention discloses a flame retardant polyol composition composed of phosphorus-containing polyol and polyether polyol and further discloses a weight fraction ratio of the polyols. The phosphorus-containing polyol is phosphorus-containing flame-retardant polyol prepared by reacting phosphorus-containing small molecules with an epoxy substance, the viscosity of the phosphorus-containing flame-retardant polyol is 1500-3500 mPa s, and the hydroxyl value of the phosphorus-containing flame-retardant polyol is 400-600 mg KOH / g; the molar ratio of a hydroxyl group of the phosphorus-containing small molecules to an epoxy group of the epoxy substance is from 1:0.8 to 1:1. The invention also discloses a preparation method and application of the flame retardant polyol composition in polyurethanerigid foam. A flame retardant element is introduced into a molecular chain of polyurethane through a chemical reaction, high flame retardancy and stability during application are achieved, the development cost is low, there are no by-products, a process is simple, and the flame retardant performance is high.

The invention provides a preparation method of a flexible transparent electrode. The method comprises the steps of firstly preparing a PEDOT / PSS mixed solution and a silver nanowire mixed solution andthen mixing the PEDOT / PSS mixed solution with the silver nanowire mixed solution; adding a catalyst, an alcohol solvent and a stabilizer and stirring in a constant-temperature bath under a sealing condition to obtain a coating solution with appropriate viscosity; and finally coating a substrate with the coating solution and carrying out curing treatment to obtain the flexible transparent electrode. The method has the beneficial effects that the antioxidant capacity of silver nanowires is improved, and meanwhile, excellent conductivity and mechanical property of the silver nanowires are reserved; a silver nanowire transparent conductive film can be internally arranged to replace an ITO transparent conductive film, so that the manufacture process is simple; the requirements of new technologies, such as touch and flexible display can be met; traditional equipment for an ITO transparent conductive material and the material cost are reduced; and the reliability of a product is improved.

The invention discloses a high-safety polymer battery positive plate protected by a solid electrolyte coating. The high-safety polymer battery positive plate comprises an aluminum foil and double coating layers, wherein the aluminum foil serves as a positive current collector, and the outer surface of the aluminum foil is coated with double coating layers; the double-layer coating layer comprisesa composite solid electrolyte coating coated on the aluminum foil and a positive active material coating coated on the composite solid electrolyte coating; and the composite solid-state electrolyte coating comprises a first conductive agent and a composite solid-state electrolyte. In addition, the invention also discloses a high-safety polymer battery based on positive electrode protection, and apreparation method of the high-safety polymer battery based on positive electrode protection. According to the high-safety polymer battery positive plate, the polymer battery and the battery preparation method disclosed by the invention, the contact between the positive active material and the aluminum foil can be effectively blocked, the aluminothermic reaction when the polymer battery is in safety failure is prevented, the exothermic chain reaction of the battery is avoided, and the safety of the polymer battery is improved.

The invention belongs to the energy storage research field, and particularly relates to a lithium ion battery positive electrode material. The lithium ion battery positive electrode material comprises a core structure and a shell structure; the core structure is a secondary granular structure, comprising main conductive networks with a porous structure and nanometer primary particles arranged in the porous structure of the main conductive networks in a filling manner; the nanometer primary particles comprise at least one kind of nanometer lithium cobalt oxides, nanometer lithium manganate, nanometer lithium iron phosphate, nanometer nickel cobalt manganese, nanometer nickel cobalt aluminum, nanometer lithium nickelate, nanometer lithium vanadium oxide and nanometer lithium-rich positive electrode material; relatively strong chemical bonds and acting force exist between the main conductive structures; and by virtue of the chemical bonds, the nanometer primary granules are tightly locked in the porous structure of the main conductive networks. Therefore, it is ensured that the lithium ion battery positive electrode has excellent electrochemical performance.

The invention relates to a preparation method of modified polycarbonate (PC), in particular to a preparation method of halogen-free flame-retardant and high-toughness modified PC. The preparation method comprises the following steps of: preparing a powder raw material from 5-10 parts by weight of PC powder, 0.03-0.1 part by weight of sulphonate flame retardant, 0.1-1 part by weight of antioxidant and 0.01-0.02 part by weight of toner; preparing a particle raw material from 75-85 parts by weight of PC particles and 4.86-10 parts by weight of silicon rubber toughening agent; mixing powder with particles respectively in different stirrers; and feeding the mixture of the powder and the particles into different feeding hoppers, extruding by using a double screw extruder, cooling, dicing and packing. A small amount of flame retardant is uniformly dispersed into the entire material, the cooperative and synergistic action of the halogen-free flame retardance and toughening property of the modified PC is brought into play after the flame retardant is combined with the silicon rubber toughening agent, and superior combination is realized, so that the modified PC has high flame resistance and shock strength, and the prepared modified PC has stable performance.

The invention provides a moisture-proof protection film of an SrI2:Eu-doped scintillating crystal and a preparation method of the moisture-proof protection film. Aiming at the problem of easy deliquescence of the SrI2:Eu-doped scintillating crystal, a strontium fluoride film is deposited on a crystal surface by using an electron beam evaporation technology. As the film is capable of hindering contact of moisture in a working environment with the crystal surface, the deliquescence proof property of the crystal is improved and the service life of the crystal is prolonged. The preparation method is easy to control and suitable for mass production. The coated SrI2:Eu-doped scintillating crystal prepared by the invention is suitably applied to fields such as security inspection equipment, nuclear medicine imaging, nuclear radiation detection and the like.

The invention discloses phosphated metal rust-proof oil, comprising the following components: 10-15 parts of antirust agent 1, 1-3 parts of antirust agent 2, 2-8 parts of soap, 20-30 parts of stabilizer, and 50-60 parts of cosolvent. The invention also discloses a preparation method of the phosphated metal rust-proof oil. The phosphated metal rust-proof oil can rapidly form a semi-solid mucosal rust protective layer on the metal surface within 3-5 minutes according to the characteristics of phosphated metal; meanwhile, contact of metal with oxygen and steam in the air is blocked, so as to play an effective rust protection effect on phosphated metal.

The invention provides fire-resistant silicone rubber. The fire-resistant silicone rubber comprises the following raw materials: silicone rubber, white carbon black, glass fiber, glass beads, aluminumhydroxide, magnesium hydroxide, copper oxide, a heat stabilize, refractory fillers, a vulcanizing agent, a catalyst and hydroxyl silicone oil, wherein the catalyst takes carbon black as a carrier andtakes palladium, tungsten and platinum as active components, and the mass ratio of the palladium to the tungsten to the platinum to the carbon black is 1:2:5:100; the refractory fillers comprise quartz sand, mica powder, talcum powder and basalt; and the heat stabilizer comprises calcium carbonate, magnesium stearate, calcium stearate, zinc oxide and phosphite ester. The sources of the raw materials are wide, the preparation method is simple, the cost is low, and the prepared silicone rubber has high fire-resistant and flame-retardant properties and can be widely applied.

The invention belongs to the field of lithium metal batteries, and particularly relates to a lithium metal battery electrolyte added with insoluble solid particles. The lithium metal battery electrolyte comprises a basic electrolyte and insoluble solid particles, the basic electrolyte comprises an organic solvent and a conductive lithium salt, the insoluble solid particles are nitrides and / or fluorides of M metal, and the M metal is at least one of Li or metal capable of being reduced and replaced by the Li metal. The invention also provides an application of the electrolyte, and a negative electrode and a lithium metal battery prepared from the electrolyte. According to the invention, different particles in the electrolyte are co-deposited on the metal lithium on a current collector, andgenerate the chemical reaction with the nano-particles to generate a stable SEI film and the corresponding lithium precipitation sites. According to the technical scheme, the growth of lithium dendrites can be effectively avoided, so that the charge-discharge coulombic efficiency of the metal lithium negative electrode is improved, and the cycle life is prolonged.

The invention relates to a semiconductor package and a method of packaging the same, wherein the method comprises the following steps: setting wafers on a bearing piece; inert gas passing through the periphery of the line end of the linear part of the copper welding wire so that the line end is formed into a ball part, wherein the distance between each edge of the ball part and the central line of the copper welding wire is basically equal, and the linear part and the ball part respectively have a line diameter D1 and a ball diameter D2, and D2 is larger than or equal to 2*D1 and is smaller than or equal to 2.5*D1; bonding the ball part to the pad of the wafer, wherein the ball part is formed into arc bonding part after bonding, the distance between each edge of the arc bonding part and the central line of the copper welding wire is basically equal, the linear part after bonding has a cross section diameter D1', the arc bonding part has a cross section diameter D2', and D2' is larger than or equal to 1.8*D1' and is smaller than or equal to 3*D1'; and coating the wafer and the copper welding wire and covering the bearing piece so that a sealing compound, the wafer and the bearing piece form the package. In the electric burning process of the ball part of the copper welding wire in the method of packaging the semiconductor, the inert gas can efficiently prevent oxygen gas from being contacted with copper, thus copper is not easy to oxidize even at high electric burning temperature; therefore, the invention has the benefit that the ball part is in the shape of a ball successfully.

The invention provides a lithium ion battery, which includes a positive pole piece, a negative pole piece, a diaphragm, and an electrolyte. The positive pole piece includes a positive electrode current collector and a positive electrode membrane disposed on the surface of the positive electrode current collector and containing a positive electrode active material, wherein the positive electrode active material includes a substrate, a first coating layer coating the surface of the substrate in a discrete island form, and a second coating layer coating the first coating layer and the surface ofthe substrate in a continuous layered form. The electrolyte includes an additive A and an additive B. The additive A is selected from one or more of cyclic sulfate compounds represented by Formulas 1and 2. The additive B is selected from one or two of lithium difluorobisoxalate phosphate and lithium tetrafluorooxalate phosphate. The gas output of the lithium ion battery can be reduced, the cyclelife and the storage life of the lithium ion battery can be prolonged, and an increase in DC internal resistance of the lithium ion battery can be significantly inhibited during the cycle and storageprocesses.