31results about How to "Conductivity does not affect" patented technology

The invention relates to the field of petroleum engineering hydraulic fracturing, in particular to shear thickening liquid and a modified degradable fiber based thereon, a preparation method and a temporary blocking deflection fracturing method. The temporary blocking deflection fracturing method comprises: step 1, preparing the shear thickening liquid; step 2, modifying the degradable fiber DF-1;step 3, setting a fracturing packer and injecting prepad fluid to press and open a stratum; step 4, inject sand-carrying fluid mixed with the modified degradable fiber to fill a crack; step 5, injecting a fiber deflection agent solution for deflection and fracture forming; step 6, filling a new fracture with the sand-carrying liquid mixed with the modified degradable fiber, and then replacing forstopping pumping. A non-Newtonian fluid is utilized to modify the degradable fiber DF-1, so that a net structure formed by the fiber in the solution is more stable, and the temporary blocking abilityof the stratum crack is greatly enhanced; compared with the prior art, more deep branch seams can be formed, thus greatly improving the communication between old seams as well as natural cracks and unused reservoir areas, and achieving the suitability for popularization and application in low-permeability tight reservoirs.

The invention discloses a preparation method of a self-repairing transparent polyurethane composite material with electrical conductivity and thermal reversibility. The preparation method comprises the following steps: step 1, synthesizing a prepolymer (MPF) from furfurylamine (FAm) and 4, 4 '-diphenylmethane diisocyanate (MDI) through a one-step method, carrying out a reaction by using a dienophile, carrying out a DA reaction through an electron withdrawing effect, and carrying out tape casting in a template to obtain a self-repairing transparent polyurethane film (PU-DA) with thermal reversibility; and step 2, loading the nano silver wire onto a self-repairing transparent polyurethane film (PU-DA) with thermal reversibility through a charge adsorption effect so as to prepare the self-repairing transparent polyurethane film (PU-DA / Ag) with conductivity and thermal reversibility. The prepared composite material has the advantages of better light transmission, conductivity and the like,and has wide application in the field of flexible electronic devices.

The invention relates to a composition of lead-free conductive slurry for a crystalline silicon solar cell and a preparation method for the lead-free conductive slurry. The slurry is prepared from the following raw materials in percentage by mass: 55-70% of silver powder, 1-15% of inorganic glass powder, 20-35% of organic binder and 0.5-1% of inorganic auxiliaries. According to the preparation method, SHBF-160 series glass is taken as an inorganic binding phase of the silver conductive slurry, so that high wettability and reactivity with a base material are obtained, and the sintering of the silver powder is facilitated; consequently, a back surface silver electrode is high in conductivity, weldability, soldering resistance, adhesive force and reliability, and the lead-free silver conductive slurry is realized; Ti, Zn, Fe, metal powder or other oxide powder are added to the silver conductive slurry, so that the contact resistance between the silver electrode and the silicon base material is reduced, and the ohmic contact between the sintered silver electrode and the base material is ensured under the premise of not affecting the weldability, soldering resistance, adhesive force and reliability of the sintered silver electrode.

The invention discloses a preparation method of superfine-structure graphite used for electric spark machining. Main raw materials comprise calcined petroleum coke, artificial graphite, asphalt and intermediate-phase carbon microspheres. The preparation method sequentially comprises the following steps: grinding powder, screening, mixing kneading, isostatic-pressure molding, roasting, graphitizing, resin impregnation and the like, thereby preparing the superfine-structure graphite used for the electric spark machining. The preparation method of the superfine-structure graphite used for the electric spark machining is simple to operate, sufficiently utilizes resources, is high in yield, reduces the cost, has relatively high volume density and mechanical strength, and fills up the blank of superfine-structure graphite used for electric spark in China.

The invention provides a water-based flux for lead-acid batteries, which relates to the technical field of lead-acid batteries. The water-based flux for lead-acid batteries includes the following raw materials in parts by weight: 0.05-0.15 parts of ionic liquid, 1-3 parts of carbon black, 0.5-1.5 parts of graphene, 0.05-0.15 parts of corrosion inhibitor, 0.5-1.5 parts of anionic surfactant, 5-8 parts of acetone, 5-8 parts of isopropanol, and 40-72 parts of water. The soldering flux proposed by the present invention has strong film-removing ability, low corrosiveness, and is easy to disperse on the base material to be welded and the surface of the solder, and the firmness between the solder and the base material to be welded is strong, and the electrical conductivity of the solder joint is good, and the welded flux is The service life of the parent material is long, and the invention also provides a method for preparing water-based flux with simple operation, reasonable method and uniform dispersion of raw materials.

The invention relates to a magnetic optical fiber coupling device which comprises an inserting head and an inserting tail which are inserted each other, wherein the inserting head comprises a first plugging part and a first connecting part, the inserting tail comprises a second plugging part and a second connecting part, and both the first plugging part and the second plugging part are magnetic and are opposite in magnetism; the first inserting part comprises a first optical fiber compound body and a tube wall which is arranged out of the first optical fiber compound body; and the second inserting part comprises a second optical fiber compound body and a sleeve which is arranged out of the second optical fiber compound body. The coupler provided by the invention is high in plugging speed, high in durability, good in optical fiber alignment property and high in light conductivity, and can axially rotate randomly after connection without affecting the light conductivity; and by way of inserting or combining each other in a concave-convex manner and the like for matched connection, the stability and reliability of the coupling mode are greatly increased, and the light conductivity is further greatly improved correspondingly.

The invention discloses efficient low-warpage crystalline silicon solar cell conducive aluminium paste. The conducive aluminium paste comprises the components of aluminium powder, an organic carrier, at least one inorganic binder, and tin oxide doped conductive powder, wherein the tin oxide doped conductive powder is selected from at least one of antimony doped tin oxide (ATO), indium doped tin oxide (ITO), fluorine doped tin oxide (FTO), wolfram doped tin oxide (WTO), or aluminium doped tin oxide (TOA). The doped tin oxide conductive powder is uniformly dispersed in the aluminium paste; the doped tin oxide conductive powder becomes an out-phase stress releasing center in a sintered aluminium conducive layer; the warpage of a cell piece can be reduced; the doped tin oxide conductive powder is good in the conductivity; the doped tin oxide conductive powder is introduced as the out-phase stress releasing center, however, the conductivity of the aluminium conducive layer is not influenced; and the warpage of the silicon-based solar cell piece is reduced, and the photoelectric conversion efficiency of the solar cell is ensued as well.

The invention discloses a foldable and flexible transparent anode, which comprises an ITO film and a nano silver wire transparent conductive film coated between an OLED and a flexible substrate. The pattern of the ITO film overlaps with the wire pattern of the nano silver wire transparent conductive film. The ITO film is located on the side of the OLED, and the transparent conductive film of the nano-silver wire is located on the side of the flexible substrate. The thickness of the ITO film is 10-20 nm. The transparent anode of the present invention has both the work function of the ITO film and the nano-silver wire. The ductility and conductivity of the film are especially suitable for use in foldable flexible OLED display panels and OLED lighting. Even if the OLED is broken after repeated bending, it will not affect the conductivity of the anode.

The invention provides a forming method of a semiconductor structure. A deposited silver metal layer is processed by use of gaseous hexamethyl disilazane; and a layer of siloxane containing a methyl group is formed on the surface of the silicon metal layer. The siloxane has hydrophobicity and rejects attached water vapor particles, and the water vapor particles are in point contact on the siloxane. Compared with the condition that the water vapor particles are in surface contact on the surface of the unprocessed silver metal layer, the forming method provided by the invention has the advantage that the volume of water drops attached to the surface of the silver metal layer can be reduced, i.e., the adhesion amount of water vapor is reduced. The probability that Ag in the silver metal layer is combined with O2 in air under the condition of the water vapor to form Ag2O is reduced through reduction of the adhesion amount of the water vapor; and the conductivity of the silver metal layer is improved.

The invention discloses a manufacturing method of a nickel-cadmium battery cadmium negative electrode piece. The method comprises: A. mixing superfine cadmium oxide, a nano-graphite conductive agent and a carbon nanotube according to a mass ratio of 7.5:0.5-1:2-6 so as to obtain an active substance mixture, selecting a negative mixed binder accounting for 2-6% of the mass of the active substance mixture, selecting a negative thickener accounting for 1-2% of the mass of the active substance mixture, selecting distilled water accounting for 25-45% of the mass of the active substance mixture, and mixing the materials uniformly to obtain a mixed slurry; B. coating a negative current collector with the slurry, then carrying out drying and cutting, and welding a negative pole ear. With changing the existing nickel-cadmium battery basic production processes and production equipment, the method provided in the invention can produce nickel-cadmium batteries with stable performance, high circulating capacity, long service and storage life, good large current discharge effect, and high safety performance.

A method for electroplating a thin lead coating on a carbon grid of a lead-carbon battery, comprising the following steps: filling a mixed carbon slurry into a forming mold to obtain a carbon grid; sequentially performing degreasing operations on the carbon grid; High-temperature baking operation; roughening operations on carbon grids in sequence; using SnCl 2 solution to sensitize the carbon grid; using PdCl 2 The solution activates the carbon grid; the carbon grid is placed in the copper plating solution for copper plating to form a substrate copper layer on the surface of the carbon grid; the carbon grid is placed in the lead plating solution for Lead plating is performed to form a thin lead plating on the surface of the copper layer of the substrate. The substrate copper layer not only has good adhesion to the surface of the carbon grid, but also has a strong binding ability with the electroplated lead layer, which can form an electroplated lead layer on the surface of the carbon grid, thereby enabling the carbon grid to bond with tin The paste has higher affinity, and the carbon grid has better mechanical properties through the coating of the copper and lead coatings on the carbon grid.

The invention discloses a flexible OLED lighting panel, which comprises a flexible ultra-thin glass at the bottom layer, a nano-silver wire transparent conductive film is printed on the flexible ultra-thin glass, an ITO film is plated on the nano-silver wire transparent conductive film, and an edge is printed on the ITO film There is an insulating frame, and OLED is evaporated on the ITO film and the insulating frame. The present invention uses ultra-thin glass to replace PI as a flexible substrate, which can eliminate the need for glass carrier substrate, laser peeling process and equipment; Eliminate expensive vacuum coating equipment.

The invention discloses a cover board of a cavity filter. The cover board is used for closing a cavity of the cavity filter, and comprises a cover board body, wherein the cover board body is made of copper aluminum alloy; the alloy is copper-aluminum composite integrated alloy, namely one surface is made of copper and the other surface is made of aluminum; the aluminum surface is aligned at the cavity when the cover board is used; a tuning threaded hole is formed in the cover board body; the tuning threaded hole specifically is a lug boss which extends towards the direction of the cavity and is molded integrally with the cover board body; the middle part of the lug boss is hollow; an inner ring of the lug boss is made of copper; an outer ring is made of aluminum; the threaded hole is formed in the lug boss along the axis direction; a tuning hole which is connected with the threaded hole is also formed in the lug boss along the axis direction; the tuning hole is closer to the cavity of the filter than the threaded hole; and the diameter of the tuning hole is smaller than that of the tuning self-locking bolt of the filter. According to the cover board of the cavity filter, the cost and the tuning performance are considered; and resources are saved.

The invention relates to a metal bipolar plate, a preparation method thereof and a fuel cell, which relate to the technical field of fuel cells. According to the main technical scheme, the metal bipolar plate comprises a metal substrate, a metal oxide coating and a conductive coating, wherein the metal oxide coating is deposited on the metal substrate, and the metal oxide coating comprises an unsaturated metal oxide layer; and the conductive coating is deposited on the metal oxide coating. Thus, the corrosion resistance, the conductivity and the coating binding force of the metal bipolar plateare improved, so that the service lives of the metal bipolar plate and the fuel cell are prolonged.

A high-strength PCB circuit board conductive silver paste, made of the following raw materials in parts by weight: antimony tin oxide 10‑20, calcium sulfate whiskers 2‑4, micron silver powder 50‑60, tantalum carbide whiskers 4‑6, Herotropine 1‑2, glass powder 7‑10, isopropyl tris (dioctyl pyrophosphate acyloxy) titanate 1‑2, E‑12 epoxy resin 8‑12, isocyanate 2‑3, Diethylene glycol 3-5, glyceryl triacetate 5-7, itaconic acid 1-2, terpineol 4-6; the silver paste of the present invention increases printing by adding calcium sulfate whiskers and tantalum carbide whiskers. The strength of the circuit is not easy to fall off and break; by adding tin antimony oxide, while ensuring excellent electrical conductivity, the amount of silver powder is saved, and the prepared silver paste has low cost, excellent electrical conductivity and good dispersibility; by using the glass of the present invention Powder, low melting point, easy to solidify and form, does not affect electrical conductivity.

The invention provides a nitrogen-doped porous vertical graphene nanowall array. A compact coating layer is formed by means of nickel hydroxide serving as a template and the self-assembly property of dopamine, then high-temperature carbonization is conducted to prepare a nitrogen-doped vertical graphene nanowall array material, in-situ functional modification is conducted on the basis, the compound functional material loaded with noble metal nanoparticles, noble metal alloy nanoparticles, metal oxides, metal sulfide, metal phosphide, conductive polymers and the like is obtained, and application in the fields of supercapacitors, lithium ion batteries, water decomposition, electrochemical catalysis, enzyme-free biosensors and the like is explored.

The invention discloses a cavity filter, which comprises a cavity, a cover board and a tuning self-locking bolt, wherein the cover board is used for closing the cavity of the cavity filter; the cover board comprises a cover board body; the cover board body is made of a copper aluminum alloy; a tuning threaded hole is formed in the cover board body and specifically is a lug boss which extends towards the direction of the cavity and is molded integrally with the cover board body; the tuning self-locking bolt is divided into a head part and a rod part and is fabricated by copper; the head part is arranged at one end of the bolt; the rod part is arranged at the other end of the bolt; two sets of threads are arranged on the head part of the bolt to form screws; the upper and lower two sets of threads are the same in diameter L and screw pitch P; and the diameter of the part between the two threads is 40%-70% that of the rod part. The cavity filter disclosed by the invention has the advantages of cost and tuning performance.

The invention relates to the field of petroleum engineering hydraulic fracturing, in particular to a shear thickening liquid, a modified degradable fiber based on it, a preparation method and a temporary plugging diversion fracturing method: the first step is to prepare shear thickening liquid; the second step is to modify the degradable fiber DF‑1; the third step is to set the fracturing packer and inject the hydraulic pressure to open the formation; the fourth step is to inject the sand-carrying fluid mixed with the modified degradable fiber to fill the fracture The fifth step is to inject the fiber diverting agent solution to divert the joint; the sixth step is to inject the sand-carrying liquid mixed with the modified degradable fiber into the new joint for filling, and then replace and stop the pump. The invention uses non-Newtonian fluid to modify the degradable fiber DF-1, so that the network structure formed by the fiber in the solution is more stable, and the temporary plugging ability of formation fractures is greatly enhanced; compared with the prior art, it can produce more More and deeper branch fractures can greatly improve the connectivity between old fractures, natural fractures and undeveloped reservoir areas, and are suitable for popularization in low-permeability tight reservoirs.

The invention discloses a manufacturing method of a nickel-cadmium battery cadmium negative electrode piece. The method comprises: A. mixing superfine cadmium oxide, a nano-graphite conductive agent and a carbon nanotube according to a mass ratio of 7.5:0.5-1:2-6 so as to obtain an active substance mixture, selecting a negative mixed binder accounting for 2-6% of the mass of the active substance mixture, selecting a negative thickener accounting for 1-2% of the mass of the active substance mixture, selecting distilled water accounting for 25-45% of the mass of the active substance mixture, and mixing the materials uniformly to obtain a mixed slurry; B. coating a negative current collector with the slurry, then carrying out drying and cutting, and welding a negative pole ear. With changing the existing nickel-cadmium battery basic production processes and production equipment, the method provided in the invention can produce nickel-cadmium batteries with stable performance, high circulating capacity, long service and storage life, good large current discharge effect, and high safety performance.

The invention discloses a copper-filled groove structure, and the structure comprises a groove which is formed in a first dielectric layer; barrier layers are formed on the bottom surface and the side surface of the groove; forming a cobalt layer and a ruthenium layer on the surface of the barrier layer; the copper layer completely fills the groove in which the barrier layer, the cobalt layer and the ruthenium layer are formed and forms a copper filling groove structure; the copper layer is completely composed of a copper electroplating film; a cobalt layer and a ruthenium layer are overlapped to form an auxiliary nucleation film layer of the copper layer. The invention further discloses a manufacturing method of the copper filling groove structure. The copper layer does not contain a copper seed crystal layer and is completely composed of the copper electroplating film, so that the capacity of filling copper in the groove can be improved, the structure of the groove filled with the copper can be reduced, and the copper electroplating film is particularly suitable for being used as a copper connecting wire and a through hole below 14 nm process nodes.

The invention discloses a conductive film, a method for preparing the conductive film and an ink used therefor. The preparation method comprises the following steps: 1) preparing ink and electroless plating solution; the ink includes a main component, an additive and a solvent, and the main component It consists of a photocurable resin with a mass fraction of 10% to 60% and a metal filler with a mass fraction of 40% to 90%. The metal in the filler is more active than the target metal; the electroless plating solution is the plating solution corresponding to the target metal ion. solution; wherein, the target metal is the type of metal that plays a conductive role in the conductive film to be prepared; 2) printing and drying; 3) electroless plating treatment; 4) light treatment. The prepared conductive film includes an adhesive and a metal film, the metal film is bonded to the substrate through the adhesive, and the metal film is a continuous metal film formed by sintering metal particles. In the ink of the invention, low-cost metals can be used as fillers, so that the cost is low, and the conductivity of the prepared conductive film is also good.

The invention discloses a cavity filter, which comprises a cavity, a cover board and a tuning self-locking bolt, wherein the cover board is used for closing the cavity of the cavity filter; the cover board comprises a cover board body; the cover board body is made of an aluminum product; a tuning threaded hole is formed in the cover board body and specifically is a lug boss which extends towards the direction of the cavity and is molded integrally with the cover board body; the tuning self-locking bolt is divided into a head part and a rod part and is fabricated by copper; the head part is arranged at one end of the bolt; the rod part is arranged at the other end of the bolt; two sets of threads are arranged on the head part of the bolt to form screws; the upper and lower two sets of threads are the same in screw pitch P; the diameter of the upper thread is greater than that of the lower thread; and the diameter of the part between the two threads is 40%-70% that of the rod part. The cavity filter disclosed by the invention has the advantages of cost and tuning performance.