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

Shear thickening liquid, modified degradable fiber based thereon, preparation method and temporary blocking deflection fracturing method

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.
Owner:XI'AN PETROLEUM UNIVERSITY

Self-repairing transparent polyurethane composite material with electrical conductivity and thermal reversibility and preparation method thereof

InactiveCN111825872AConductivity does not affectDoes not affect self-healingCoatingsPolymer scienceFurfurylamine
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.
Owner:JINLING INST OF TECH

Composition of lead-free conductive slurry for crystalline silicon solar cell and preparation method for lead-free conductive slurry

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.
Owner:WUHAN BOXIN TECH CO LTD

Preparation method of superfine-structure graphite used for electric spark machining

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.
Owner:天津锦美碳材科技发展有限公司

Cavity filter

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.
Owner:JOHNSON PRECISION ENG SUZHOU

Foldable flexible transparent anode and manufacturing method thereof

The invention discloses a foldable flexible transparent anode. The foldable flexible transparent anode comprises an ITO film and a nano silver wire transparent conductive film, wherein the ITO film and the nano silver wire transparent conductive film are coated between an OLED (organic light emitting diode) and a flexible substrate; the pattern of the ITO film is coincided with the pattern of a nano silver wire transparent conductive film; the ITO film is positioned on one side of the OLED; the nano silver wire transparent conductive film is positioned on one side of the flexible substrate; and the thickness of the ITO film is 10 to 20 nm. The transparent anode disclosed by the invention has the work function of the ITO film and the extensibility and conductivity of the nano silver wire film, is particularly suitable for being applied to foldable flexible OLED display panels and OLED illumination, and the conductivity of the anode cannot be influenced even though the ITO is broken dueto repeated bending of the OLED.
Owner:AENEQ CO LTD

Method for electroplating carbon plate grid of lead-carbon battery with thin lead plating layer

ActiveCN110923769AImprove current passing abilityDoes not affect current passing capabilityElectrode carriers/collectorsCopper coatingElectrical battery
A method for electroplating the carbon plate grid of a lead-carbon battery with a thin lead plating layer includes the following steps: filling a forming mold with a mixed carbon slurry to obtain a carbon plate grid; successively de-oiling the carbon plate grid; baking the carbon plate grid at high temperature; successively roughening the carbon plate grid; using a SnCl2 solution to sensitize thecarbon plate grid; using a PdCl2 solution to activate the carbon plate grid; placing the carbon plate grid in a copper plating solution and performing a copper plating operation to form a substrate copper layer on the surface of the carbon plate grid; placing the carbon plate grid in a lead plating solution and performing a lead plating operation to form a thin lead plating layer on the surface ofthe substrate copper layer. The substrate copper layer not only has a good adhesion ability to the surface of the carbon plate grid, but also has a good binding ability to the electroplated lead layer. The method can form the electroplated lead layer on the surface of the carbon plate grid, thereby enabling the carbon plate grid and solder paste to have high affinity. The copper plating layer andthe lead plating layer coat the carbon plate grid such that the carbon plate grid has better mechanical properties.
Owner:ZHAOQING LEOCH BATTERY TECH

Forming method of semiconductor structure

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.
Owner:SEMICON MFG INT (SHANGHAI) CORP

Carbon nanotube containing PCB silver paste and preparation method thereof

A carbon nanotube containing PCB silver paste comprises the following raw materials by weight: 55-65 parts of superfine silver powder, 10-20 parts of silver-coated glass powder, 1-2 parts of aluminum stearate, 8-10 parts of glass powder, 1-2 parts of ethylene bis oleamide, 7-10 parts of non-dry alkyd resin, 2-3 parts of polyurethane resin, 4-6 parts of acetic ether, 3-5 parts of diisobutyl ketone, 3-5 parts of butyl carbitol acetate, 3-5 parts of ethanol, 0.4-0.7 parts of linseed oil, 3-6 parts of carbon nanotubes, 0.2-0.5 parts of grape seed oil, and 0.3-0.6 parts of dimethyl silicone oil. As carbon nanotubes are added, the electrical conductivity, dispersity and circuit bonding strength are increased, the silver paste is not easy to fracture or fall off, and the consumption of silver powder is reduced. Through the use of glass powder, the melting point is low, sinter-molding is easy, and the electrical conductivity is not affected. Moreover, the silver paste has good printing performance, and the circuit is clear and continuous and has no bubbles.
Owner:TONGLING HONGZHENG NETWORK SCI & TECH CO LTD

Carbon nano tube composite material wrapped by carbon material as well as preparation and application of carbon nano tube composite material

The invention relates to a lead-carbon battery, in particular to a carbon-material-wrapped carbon nanotube composite material and preparation and application thereof.The preparation method includes the steps that in a hydrothermal reaction, a sucrose or glucose aqueous solution and carbon nanotubes are added into a kettle for a hydrothermal reaction, a solid product is dried and then dispersed in a polyvinylpyrrolidone (PVP) aqueous solution again, and drying is conducted; and sintering in an N2 atmosphere environment, and activating the sintered product in a CO2 atmosphere environment to obtain the composite material. The peak current density of hydrogen precipitation in the charging process of the lead-carbon battery is reduced, battery sulfation is relieved, and the cycle life of the battery is prolonged.
Owner:DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI

Reinforced polyethylene solid-wall pipe and preparation method thereof

The invention relates to the technical field of polyethylene pipes, in particular to a reinforced polyethylene solid-wall pipe and a preparation method thereof. The reinforced polyethylene solid-wall pipe comprises the following raw materials in parts by weight: 70-90 parts of high-density polyethylene, 5-30 parts of linear low-density polyethylene, 10-30 parts of a modified filler, 5-10 parts of a dispersant, 2-6 parts of a lubricant, 8-15 parts of a flame retardant, 3-8 parts of a heat stabilizer, 4-10 parts of an antioxidant, 2-8 parts of a coupling agent and 3-6 parts of color master batches. The invention aims to enable charges on the inner wall of the pipeline to be easily conducted to the surface of the pipeline and charges on the surface of the pipeline to be easily conducted to the environment, so that the antistatic property of the pipeline is improved, the pipeline has good toughness and thermal stability, and the safety of the pipeline in the using process is improved.
Owner:杭州联通管业有限公司

Nitrogen-doped porous vertical graphene nanowall array and its preparation method and application

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.
Owner:HUAZHONG UNIV OF SCI & TECH

Flexible OLED (organic light emitting diode) lighting panel and manufacturing method thereof

The invention discloses a flexible OLED (organic light emitting diode) lighting panel. The lighting panel comprises flexible ultrathin glass at the bottom layer of the lighting panel; a silver nanowire transparent conductive film is printed on the flexible ultrathin glass; an ITO film is plated on the silver nanowire transparent conductive film; an insulating frame is printed on the upper edge ofthe ITO film; and an OLED is formed on the ITO film and the insulating frame by means of evaporation. According to the flexible OLED lighting panel of the invention, the ultrathin glass replaces PI toserve as a flexible substrate, so that a glass carrying substrate, a laser lift-off process and equipment can be omitted; and a water-oxygen barrier layer is not required to be plated, so that expensive vacuum coating equipment is omitted.
Owner:AENEQ CO LTD

A cavity filter

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.
Owner:JOHNSON PRECISION ENG SUZHOU

Anti-oxidation printed circuit board (PCB) and manufacturing process thereof

The invention discloses an anti-oxidation printed circuit board (PCB) and a manufacturing process thereof, and relates to the technical field of printed circuit board manufacturing. The manufacturing process comprises the steps of oil removal, water washing, etching, water washing, chemical nickel plating, polishing, protection treatment and electroplating of a magnesium thin layer. The surface of the PCB is cleaned by an alkaline degreasing agent, and the degreasing agent is mixed with water in a ratio of 1: (10-15) to prepare a working solution; after uniform stirring, using at normal temperature, the PCB is completely soaked, and the ph value is regularly checked in the using process so that the ph value of the degreasing solution is kept at about 8; after 10 minutes, washing is performed with clear water, wherein the washing must be clean; and the PCB is put into sulfate to be soaked for 5 minutes and then is washed with clear water again. The process has the advantages that the oxidation resistance and corrosion resistance of the conductive holes of the anti-oxidation PCB are improved, the yield of the PCB after long-term storage is improved, workpieces are convenient to polish, electroplating is switched at any time, and production of the PCB is more automatic.
Owner:深圳市腾达翔电子科技有限公司

A kind of shear thickening liquid and its modified degradable fiber and its preparation method and temporary plugging diversion fracturing method

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.
Owner:XI'AN PETROLEUM UNIVERSITY

Manufacturing method of nickel-cadmium battery cadmium negative electrode

InactiveCN103151500AImprove cycle lifeHigh current charge and discharge effect is improvedElectrode carriers/collectorsAlkaline accumulator electrodesSlurryGraphite
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.
Owner:广州云通锂电池股份有限公司
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