402 results about "Copper electrode" patented technology

The invention discloses a wearable medical monitoring equipment electrode which is composed of a layered structure and comprises a transparent flexible substrate layer which is made of a biocompatible flexible polymer material and is used for providing flexible support and isolating a metal electrode from the skin; the metal grid copper transparent electrode layer is formed on the surface of the transparent flexible substrate layer through a yellow light etching micro-nano processing technology; the conductive gel layer uniformly covers the surface of the metal grid copper electrode layer; the encapsulation layer is formed by spin-coating a polymethyl methacrylate solution on the surface of the conductive gel layer and forming a transparent protection layer after curing; the gradient line width bionic honeycomb-shaped copper grid design is adopted, the light transmittance is kept, meanwhile, the collection efficiency of physiological electric signals is remarkably improved, signal transmission loss is reduced, through the polyacrylamide and nanocellulose composite gel formula and micro-channel dynamic humidity adjustment, signal stability under long-term wearing is ensured, and the application range is wide. The problem of signal distortion caused by dryness of traditional gel is solved.

The invention provides copper slurry and a preparation method thereof, a copper electrode, a solar cell and a photovoltaic module, and belongs to the technical field of conductive materials. The copper slurry comprises a dispersion medium and copper particles dispersed in the dispersion medium, the copper particles comprise first copper particles, second copper particles, third copper particles and fourth copper particles; the particle size range of the first copper particles is 1-10 [mu] m, the particle size range of the second copper particles is 500-999 nm, and the particle size range of the third copper particles is 101-499 nm; the first copper particles, the second copper particles and the third copper particles are elementary copper particles, and the fourth copper particles are cuprous hydride nanoparticles; at least part of the fourth copper particles are attached to the surfaces of the first copper particles and / or the second copper particles and / or the third copper particles. Therefore, the fourth copper particles are interconnected among the three copper particles, more transmission channels are provided, the wire resistance is reduced, and the conductivity is improved.

The invention relates to the technical field of electronic paste, in particular to copper electrode paste for an NTC thermistor and a preparation method and application of the copper electrode paste. A copper electrode slurry for an NTC thermistor comprises copper powder, an inorganic glass binder, an organic carrier and a dispersant, the inorganic glass binder comprises CuO and NiO, and the organic carrier comprises a polymer thickener. The copper electrode slurry can be coated on the surface of an NTC thermistor ceramic substrate through a silk-screen printing method, can be used as a metallized conductive layer after being sintered in nitrogen, is used for temperature measurement, temperature compensation, temperature control components and the like, and is wide in application. The copper electrode slurry for the NTC thermistor provided by the invention can be sintered in nitrogen at 550-650 DEG C, and has the advantages of wide sintering interval, good sintering appearance, excellent welding performance and strong adhesive force. After sintering, the ohmic contact is good, so that the prepared NTC thermistor can truly reflect the resistance value of a substrate, and the phenomenon of ion migration is avoided.

The utility model discloses a welding device and a welding system. The welding device comprises a welding gun; the electrode assembly comprises a first electrode and a second electrode, and the second electrode is suitable for being connected with the welding gun; the positioning block is connected with the first electrode; the correction assembly is suitable for being arranged between the first electrode and the second electrode, the correction assembly comprises a copper electrode, a to-be-welded part is arranged on the copper electrode, the contact end of the first electrode is suitable for being in surface contact with the copper electrode, and the contact end of the second electrode is suitable for being in surface contact with the to-be-welded part. According to the welding device, the end face of the electrode is enlarged, indentations are reduced, the appearance quality problems of welding spot distortion and too deep indentations on the appearance face in the existing manual resistance spot welding process are solved, the situation that the welding spot is distorted due to the fact that the electrode assembly is difficult to be perpendicular to the plane of the piece to be welded is avoided, and the appearance quality of the welding spot is optimized.

The invention discloses a method for prolonging the service life of a resistance spot-welding electrode, a manufactured resistance spot-welding electrode cap and application, and the method comprises the following steps: taking a chromium-zirconium-copper electrode cap as a base body, grinding the working surface of the base body step by step by adopting abrasive paper, and then sequentially polishing, ultrasonically cleaning and drying to obtain a pretreated base body; performing vacuum zirconium permeation treatment on the pretreated matrix by adopting a permeation agent so as to form a zirconium-rich solid solution diffusion layer in the pretreated matrix, thereby obtaining the matrix subjected to zirconium permeation reinforcement; physical vapor deposition treatment is adopted, and a metal transition layer is deposited on the surface of the solid solution diffusion layer of the matrix subjected to zirconium permeation strengthening; wherein the metal transition layer is a Cr transition layer or a Ti transition layer; and a graphite target and titanium target co-sputtering mode is adopted, and a composite gradient functional layer is sputtered and deposited on the surface of the metal transition layer of the matrix treated in the step S3. The electrode service life of the method is improved by magnitude order, and the effect is extremely remarkable.

The application belongs to the technical field of hydrogen production by ammonia decomposition, and discloses an electrically-assisted low-temperature hydrogen production method by ammonia decomposition, characterized by comprising the following steps: S1, preparing a reactor; the reactor comprises a quartz tube, two pieces of foam copper are installed in the quartz tube, a catalyst is filled between the two pieces of foam copper, each piece of foam copper is connected with a copper electrode, and two thermocouples are installed in the quartz tube and extend into the catalyst; S2, preparing the catalyst; S2.1, the catalyst is synthesized by a solution combustion method, and the precursors of the components of the catalyst are respectively Ni(NO3)2·6H2O, Co(NO3)2·6H2O, Fe(NO3)3·9H2O, Ce(NO3)3·6H2O and Zr(NO3)4·5H2O; and S3, introducing ammonia into the reactor to produce hydrogen; compared with the prior art, the application applies the electric field-assisted catalysis technology to the field of hydrogen production by ammonia decomposition, and develops a catalyst suitable for the electric field-assisted hydrogen production by ammonia decomposition.

The invention discloses a focusing type acoustic streaming heat dissipation device facing a chip. The device belongs to the crossing field of ultrasonic technology and heat dissipation technology and is composed of a piezoelectric stack, an acoustic lens, a splitter plate, a base, a supporting rod, a copper electrode and the like. According to the device, geometric parameter configuration of the splitter plate, the piezoelectric stack and the acoustic lens is optimized, and a double-piezoelectric-plate stacked structure is adopted to enhance the ultrasonic resonance effect; high-frequency alternating voltage is applied to the copper electrodes at the two ends of the piezoelectric stack, high-frequency sound waves are excited through the inverse piezoelectric effect, and after the sound waves are focused through the sound lens, a gradient sound pressure field is formed in a cavity formed by the splitter plate and the piezoelectric stack; air molecules are driven to move directionally based on the acoustic streaming effect, so that air flow at an air inlet is accelerated by sound pressure to form high-flow-rate focusing jet flow at an air outlet, and targeted forced convection heat dissipation of a chip heat source is realized. According to the device, the ultrasonic technology and the heat dissipation technology are combined, the whole device is simple in structure, free of moving parts and low in noise, and various heat dissipation requirements can be met in an array mode.

The embodiment of the invention relates to the photovoltaic field, and provides a cyanide-free electroplating silver-coated copper conductive material, a preparation method thereof and a crystalline silicon solar cell. The silver-coated copper electrode provided by the embodiment of the invention comprises a copper core and a copper-tin alloy electroplated layer coated on the surface of the copper core, the surface of the pre-plating material is coated with the silver electroplating layer; the surface of the silver-coated copper material is coated with the self-repairing layer; wherein the self-repairing layer comprises a resin film and a pH response type microcapsule, the microcapsule is embedded in the resin film, and the microcapsule is filled with an ammonium molybdate corrosion inhibitor. The copper-silver interface bonding force can be improved through the copper-tin alloy electroplated layer, and the silver layer material does not contain cyanogen and is environmentally friendly; the corrosion inhibitor in the pH response type microcapsule in the self-repairing film layer on the surface of the silver layer is released under a specific pH condition to form a protection film on the silver layer again, so that the self-repairing purpose is achieved, and the dynamic protection effect is achieved.

The invention relates to an ultrasonic-assisted longitudinal-torsional compound vibration two-roller rolling device, and belongs to the technical field of ultra-thin strip rolling. According to the device, the ultrasonic longitudinal-torsional vibration device is combined with the rolling mill, so that the deformation resistance of materials is effectively reduced, the surface roughness is improved, grains are refined, and the residual stress is reduced by utilizing ultrasonic vibration. The device comprises a rolling mill rack, an ultrasonic longitudinal-torsional vibration device, a winding device, a winding assisting device and an unwinding device. The ultrasonic longitudinal-torsional vibration device is composed of a variable-amplitude roller shaft, a connecting shaft, piezoelectric ceramics, a copper electrode, a rear cover plate and a hexagon socket screw, and has a single-excitation form and a double-excitation form. The single excitation device adopts a quarter-wavelength conical amplitude-change pole, a spiral groove is formed in the conical surface of the quarter-wavelength conical amplitude-change pole, and longitudinal vibration can be partially converted into torsional vibration; according to the double-excitation device, the torsional vibration amplitude is increased through cooperation of two longitudinal-torsional amplitude-change poles which are symmetrically arranged. The device is compact in structure, small in energy loss, high in machining precision and suitable for production of high-precision ultra-thin strips.

The invention belongs to the technical field of semiconductors and solar cells, and discloses a preparation method of a low-cost electroplating copper grid line heterojunction solar cell. In order to solve the problems that the cost is high when a metal electrode in a heterojunction solar cell is prepared through traditional screen printing low-temperature paste, and efficiency improvement is limited due to the fact that a narrower grid line is difficult to prepare in a screen printing mode, in-situ pretreatment is carried out on an N face to carry out surface roughening; then, copper electroplating is carried out in a light-induced horizontal electroplating mode to prepare an N-face copper electrode; and then turning over the battery piece to carry out P-surface copper electroplating so as to prepare the heterojunction solar battery with double-surface copper-electroplated grid lines.

The invention discloses a low-temperature safety valve leakage detection device based on electrical capacitance tomography, which comprises a liquid nitrogen storage container, a test container, a low-temperature stop valve, a detected low-temperature safety valve, a constant-temperature water bath device, a flow meter, a water tank, a leakage detection pipeline, a capacitance measurement system and a data acquisition and software system, the capacitance measuring system comprises a plurality of groups of copper electrode plates and a processing module, each group of copper electrode plates comprises two copper electrode plates arranged on two opposite side parts of the water tank, and the copper electrode plates are used for capturing bubbles formed by the low-temperature gas in the cavity and acquiring capacitance signals; and the copper electrode plate is electrically connected with the data acquisition and software system through the lead electrode plate connector and the shielding coaxial cable. Insulation supports are arranged between the water tank and the copper electrode plates, the interior of the water tank is divided into a plurality of cavities, and communication gaps are formed between the adjacent cavities. The invention further discloses a low-temperature safety valve leakage detection method based on electrical capacitance tomography. According to the method, the accuracy and comprehensiveness of calculating the leakage rate of the low-temperature gas are improved.

The invention discloses a preparation method of a high-temperature superconducting wire strip with high strength, high shunt and high heat-conducting property. The method comprises the following steps: 1, cleaning a semi-finished superconducting wire strip; 2, putting the cleaned semi-finished superconducting wire strip serving as a cathode and a copper electrode serving as an anode into copper sulfate electroplating liquid, and connecting with a direct-current power supply to form an electroplating device; and 3, after electroplating the cathode semi-finished superconducting wire strip, taking out the cathode semi-finished superconducting wire strip and staying in the air, and forming an electroplated layer of nano-scale copper grains by a process of repeatedly electroplating and taking out for multiple times, thereby obtaining the high-temperature superconducting wire strip. According to the invention, the surface of the semi-finished superconducting wire strip is plated with the electroplated layer of the nano-scale copper crystal grains through electroplating, and the high-temperature superconducting wire strip has high strength, high shunting and high heat-conducting properties by utilizing the strong pinning characteristic of the nano-copper crystal grains and the intrinsic high electric conductivity and high heat-conducting characteristics of copper, resists Lorentz force in a strong magnetic field, and has the characteristics of high conductivity and high heat conductivity. And the shunting and heat conduction capabilities of the high-temperature superconducting wire strip after quenching are improved, the process is simple, and industrial production is easy.

A dissimilar steel resistance spot welding process based on differentiated electrode parameter optimization belongs to the field of welding technology. Carbon steel and stainless steel plates are assembled and fixed on a fixture in an overlapping manner as workpieces. Chromium-zirconium-copper electrodes are selected as welding electrodes. The electrode end face diameter is 5mm to 9mm, and the electrode end face diameter on the carbon steel plate side is smaller than the electrode end face diameter on the stainless steel plate side. The electrode end face is fully contacted with the workpiece surface and pre-pressed. Welding is performed using resistance spot welding. During welding, the electrode pressure is 7kN to 10kN, the welding current is 7kA to 10kA, and the welding time is 0.2s to 0.4s. After the power is turned on, the current is removed, and the electrode pressure is maintained to allow natural cooling. At this point, the dissimilar steel resistance spot welding of carbon steel and stainless steel plates is completed. By using electrodes of different sizes on the stainless steel and low-carbon steel sides, the present invention effectively controls the nugget offset and nugget size, thereby improving the quality and stability of spot welding.

The invention relates to the technical field of thermoelectric conversion, solves the technical problems of bending strength, stretchability and the like of an existing flexible thermoelectric device, and particularly relates to a flexible thermoelectric unit based on a thermoelectric thick film, a thermoelectric device and a preparation method of the flexible thermoelectric unit. A group of thermoelectric channels are obtained by combining a thermoelectric thick film material and a slotted copper electrode, heating, welding and curing are performed to obtain a group of thermoelectric channels, a plurality of groups of thermoelectric channels are connected in parallel and inserted by using a connecting electrode to form a flexible thermoelectric unit with a three-dimensional framework, and the flexible thermoelectric unit is integrally placed into a pouring mold after connection and is packaged into a flexible thermoelectric device by a flexible packaging material. The temperature difference between the cold end and the hot end is easy to establish, and excellent bendability and reliability are achieved. Theoretical calculation shows that the flexible thermoelectric device has the stretch rate of about 51%, and the maximum output power under the temperature difference of 200K is 0.126 mW. Compared with an existing flexible thermoelectric device, the flexible thermoelectric device has the advantages of being simple in preparation method process, good in bending and stretching effect, low in cost and the like, and batch preparation can be achieved.

The invention provides an LTCC raw material belt with a high thermal expansion coefficient, an LTCC substrate and a preparation method of the LTCC substrate, the LTCC raw material belt with a smooth surface and a uniform thickness is obtained through tape casting by adjusting the proportion of silicon dioxide ceramic powder, MgTiO3 ceramic, SrTiO3 ceramic, Li2MgSiO4 ceramic, BCBS, ZABS and LASP microcrystalline glass powder, the LTCC raw material belt is sintered in a nitrogen furnace at 880-940 DEG C for 1-3 h, and the LTCC raw material belt can be co-fired with low-cost copper electrode slurry to be flat and tightly attached to the low-cost copper electrode slurry. The LTCC substrate with the thermal expansion coefficient larger than 11 ppm / DEG C is prepared, under the test frequency of 5 GHz, the dielectric constant of the LTCC substrate ranges from 5.1 to 6.1, the dielectric loss ranges from 0.0025 to 0.004, the bending strength ranges from 170 MPa to 230 MPa, the thermal expansion coefficient at the temperature ranging from 30 DEG C to 400 DEG C ranges from 11.0 ppm / DEG C to 13.0 ppm / DEG C, and acid resistance is good.

The invention discloses a low-cost modularized corrosion-wear-fatigue coupling test device for a bridge cable steel wire. The device comprises a fatigue testing machine, a corrosion assembly and a wear loading assembly, the wear loading assembly comprises N auxiliary copper wires and M annular flexible parts; the N auxiliary copper wires are uniformly distributed at the periphery of the middle part of the test steel wire, and the diameter of each auxiliary copper wire is equal to the diameter d of the test steel wire; each auxiliary copper wire is made of red copper; the M annular flexible parts uniformly sleeve the peripheries of the N auxiliary copper wires from top to bottom and are used for uniformly extruding the N auxiliary copper wires on the periphery of the steel wire; the corrosion assembly comprises a chemical corrosion assembly and an electric corrosion assembly; the electrocorrosion assembly comprises a power supply and a copper electrode; wherein the copper electrode extends into the corrosive medium outside the wear loading assembly and is connected with the positive electrode of the power supply, and the negative electrode of the power supply is connected with the test steel wire. The device can be conveniently assembled and repeatedly used, corrosion and abrasion effects can be synchronously simulated, and then the damage process of the steel wire is deeply studied.

The invention provides an ionic gel material, a carbon micron tube ionic thermoelectric supercapacitor and a preparation method and application of the carbon micron tube ionic thermoelectric supercapacitor, and belongs to the technical field of electrical materials.The preparation method comprises the steps that carbon micron tube dispersion liquid, gelatin and potassium chloride are evenly mixed according to the proportion, formed and dried, and CMTs / KCl / gelatin ionic thermoelectric gel with the thermoelectric pressure and temperature multifunctional sensing characteristic is prepared; and the flexible stretchable ion thermoelectric supercapacitor is assembled by taking the CMTs / KCl / gelatin ion thermoelectric gel as an electrolyte and taking the CMTs / MnO2 / foamy copper electrode. The CMTs / KCl / gelatin ion thermoelectric gel has thermoelectric effect and temperature and pressure sensing monitoring capability, and the prepared capacitor can be used as an energy storage device, has good electrochemical performance, realizes conversion and storage from heat energy to electric energy, especially realizes thermal voltage output under low temperature gradient, and has wide application prospect. The device can be used for converting low-order heat energy into electric energy and storing and utilizing the electric energy in real time.

The utility model discloses a getter film with high initial outbreak rate and lasting moisture absorption rate for a perovskite battery, a support framework layer is an expanded polytetrafluoroethylene microporous film layer, and an active layer is a getter active layer formed by infiltrating a getter into a pore structure of the expanded polytetrafluoroethylene microporous film layer. The composite layer is a getter composite layer formed on at least one side surface of the expanded polytetrafluoroethylene microporous membrane layer through a getter. Through the above mode, the periphery of the active material layer of the perovskite cell in a service environment can be kept in a vacuum state for a long time, and the perovskite cell is ensured to be in a high photoelectric conversion efficiency and a stable state for a long time; the getter film is coated with a back adhesive layer and is non-corrosive, and the getter film can be directly pasted on a glass cover plate of a perovskite cell or on silver, aluminum and copper electrodes for packaging after the release film is uncovered during use; and the initial explosion rate is high, and moisture and oxygen can be quickly absorbed in the packaging cavity within two hours, so that a vacuum state is achieved.

The invention relates to the field of photovoltaic technology, and discloses an interface optimization method for a front-surface seed-layer-free electrode of a photovoltaic cell and a photovoltaic device. The method comprises the following steps: placing a silicon substrate in PECVD (Plasma Enhanced Chemical Vapor Deposition) equipment, and depositing a SiOxNy composite passivation layer with the thickness of 1-10nm on the surface of a transparent conducting layer on the front surface of the silicon substrate through plasma in-situ deposition; printing low-temperature sintered copper paste of which the sintering temperature is less than or equal to 200 DEG C onto the surface of the SiOxNy composite passivation layer; and curing the printed low-temperature sintered copper paste to obtain the front copper electrode. According to the method, a front seed layer is abandoned, direct combination of a front copper electrode and a front transparent conducting layer of a silicon substrate is achieved, an efficient interface inhibition passivation tunneling layer (namely a thin SiOxNy composite passivation layer) is constructed to block a copper-silicon mutual expansion path, interface contact characteristics are optimized, low-temperature sintering type copper paste is matched, contact resistance is reduced, stability is improved, the whole process is low in temperature, and the method is suitable for large-scale production. The method is compatible with an HJT battery manufacturing system and is low in metallization cost.

The invention relates to the technical field of solar cells, in particular to a preparation method of a single-wave precisely doped N-type BC cell. The invention discloses a preparation method of a single-wave precisely doped N-type BC battery. The preparation method comprises the following steps: S1, pre-treating an N-type silicon wafer; s2, performing boron doping on the front surface of the silicon wafer by adopting infrared single-wavelength laser to form a P + shallow junction; performing phosphorus doping on the back surface of the silicon wafer by adopting ultraviolet single-wavelength laser to form an N + region; s3, carrying out single-frequency microwave annealing treatment; s4, preparing a tunneling oxide layer, a boron-doped polycrystalline silicon passivation layer and a surface laminated passivation film; s5, carrying out laser grooving and copper electrode electroplating; s6, cutting the edge of the silicon wafer by adopting single-wavelength femtosecond laser; and S7, low-temperature annealing treatment. According to the method, the doping accuracy is improved, the service life of N-type silicon wafer carriers is ensured, the carrier recombination loss is remarkably reduced, the contact resistance and edge recombination loss is reduced, and the filling factor and the conversion efficiency of the cell are improved.

The invention discloses a lithium battery precious metal recovery method based on microorganism-electrochemical coupling and one-way membrane separation, which comprises the following steps: step 1, pretreatment of a waste lithium battery: performing complete discharge treatment on the waste lithium battery, then disassembling the battery in an oxygen-free environment, separating out a positive electrode material and a negative electrode material, and drying the positive electrode material and the negative electrode material; electrode material black powder containing precious metal is obtained; 2, designing an anaerobic tank, and culturing and domesticating an acid-producing electroactive flora; 3, continuously and stably adding black powder into the anaerobic tank; copper electrodes are added to the two sides of the cylindrical anaerobic tank and the center of the one-way membrane, a power source is connected, the positive electrode is connected with the electrodes on the two sides of the anaerobic tank, and the negative electrode is connected with the membrane center electrode. Compared with the prior art, the method has the advantages that the solid-to-liquid ratio of microbiological leaching can be greatly increased through microbiological-electrochemical coupling and one-way membrane separation, the transfer efficiency of precious metal electrons is accelerated, anaerobic flora is protected, poison to the anaerobic flora is reduced, and the service life of equipment is prolonged.

The invention discloses an HJT solar cell based on a metal grid copper electrode, which comprises an N-type monocrystalline silicon substrate, the front surface and the back surface of the N-type monocrystalline silicon substrate are respectively textured, an I-type amorphous silicon layer and a P-type amorphous silicon layer are sequentially laminated on the front surface of the N-type monocrystalline silicon substrate, and an I-type amorphous silicon layer and an N-type amorphous silicon layer are sequentially laminated on the back surface of the N-type monocrystalline silicon substrate; the surface of the P-type amorphous silicon layer and the surface of the N-type amorphous silicon layer are both covered with transparent conductive oxide layers, the transparent conductive oxide layers are coated with transparent conductive colloid layers, the transparent conductive colloid layers comprise transparent resin binders and conductive substances dispersed in the transparent resin binders, and metal grid copper electrodes are arranged on the transparent conductive colloid layers; through precise design of the line width and the spacing of the metal grid copper electrode, the shading rate can be reduced to the maximum extent while low square resistance and efficient current collection can be ensured, and the requirements of scenes such as building integrated photovoltaic and the like for high-light-transmittance and low-resistance electrodes are met.

The invention discloses a three-dimensional force flexible tactile sensor and a preparation method thereof, the three-dimensional force flexible tactile sensor comprises a layered structure, a top electrode layer and a bottom electrode layer, the top electrode layer comprises a second PET substrate and a top copper electrode, the top copper electrode is installed below the second PET substrate, the top copper electrode is a square common electrode, a copper film with the thickness of 0.006 mm is adopted, the side length is 20 mm, and the thickness of the top copper electrode is 20 mm; the top copper electrode is connected with an external lead through a conductive adhesive; the elastic dielectric layer is located below the top electrode layer and is made of an Ecoflex00-30 material, the elastic dielectric layer comprises micro circular truncated cone structures arranged in an array mode, the height of each micro circular truncated cone is 0.9 mm, and the interval between every two micro circular truncated cones is 1 mm; and the bottom electrode layer comprises a first PET substrate and a bottom copper electrode. The sensor has the advantages of high sensitivity, wide temperature range stability, lightness, thinness, easiness in integration and three-dimensional force synchronous decoupling, and is simple in preparation process and low in cost.

The embodiment of the invention relates to the field of photovoltaic technology, provides a solar cell and a preparation method thereof, and can effectively reduce the resistance of a copper electrode so as to improve the photoelectric conversion efficiency of the solar cell. The preparation method comprises the steps that copper paste is printed on the first surface of the substrate to obtain a substrate to be sintered, and the first surface of the substrate is the front face of the substrate and / or the back face of the substrate; the multiple to-be-sintered substrates are sequentially arranged in a wafer box in a laminated mode, so that a to-be-sintered wafer box is obtained; preset pressure is applied to the to-be-sintered wafer box in the direction intersecting with the first surface of the to-be-sintered substrate; and when the to-be-sintered wafer box bears the preset pressure, the copper paste of the to-be-sintered substrate is sintered.

The application relates to the development and technical field of electrocatalysts, and discloses a benzothiadiazole modified single-atom zirconium-doped metal copper electrode material and a preparation method and application thereof. The preparation method comprises the following steps: dissolving inorganic copper salt and inorganic zirconium salt, adding the inorganic copper salt and the inorganic zirconium salt into an alkaline solution, and performing hydrothermal reaction to obtain a single-atom zirconium-doped copper oxide precursor; dissolving benzothiadiazole, adding the benzothiadiazole into a dispersion solution of the single-atom zirconium-doped copper oxide precursor to obtain a mixed solution; spraying the mixed solution on a polytetrafluoroethylene film substrate loaded with copper nanoparticles to obtain a benzothiadiazole modified single-atom zirconium-doped copper oxide precursor electrode material; and performing electrochemical reduction treatment on the benzothiadiazole modified single-atom zirconium-doped copper oxide precursor electrode material to obtain a benzothiadiazole modified single-atom zirconium-doped metal copper electrode material. The electrode material is applied to an electro-reduction carbon dioxide reaction as a working electrode, exhibits excellent electro-reduction CO2 performance in an acidic environment, and realizes high-value-added C 2+ product with high selectivity.

The invention belongs to the field of electro-catalysis, and particularly relates to a preparation method of a Cu foil loaded nano Cu2O electrode and application of the Cu foil loaded nano Cu2O electrode in pulse carbon dioxide electro-catalytic reduction. The surface of the Cu foil is modified by the Cu2O nano coating, the Cu2O nano coating is used for pulse carbon dioxide electroreduction reaction, and high methane selectivity and high current density are realized in carbon dioxide electroreduction by regulating and controlling pulse potential. The Faraday efficiency of the methane reaches 92% at-1.15 V vs.RHE, the partial current density of the methane is 111mA. Cm <-2 > at the moment, the stable operation time exceeds 110 hours and is not obviously attenuated, and the Faraday efficiency of the methane with the selectivity being 82% of an unmodified copper electrode is remarkably improved.

The invention relates to the technical field of compact ring plasma feeding, in particular to a preionization coaxial device and a working method thereof. According to the technical scheme, the device comprises a power connection stainless steel metal shell and a grounding stainless steel metal shell located below the power connection stainless steel metal shell, and a continuous cavity structure allowing gas to flow is jointly formed inside the power connection stainless steel metal shell and the grounding stainless steel metal shell; the red copper electrode is fixed in an inner hole formed in the top opening end in the electrifying stainless steel metal shell; the PEEK insulator is arranged on the red copper electrode in a sleeving manner and is fixedly mounted between the electrifying stainless steel metal shell and the grounding stainless steel metal shell; a small O-shaped rubber ring is arranged between the electrifying stainless steel metal shell and the PEEK insulator; the preionization coaxial device is installed on the same axial section as an air inlet port of the air valve, and after the air valve is opened, the preionization coaxial device starts to be powered on to work. The core technical problem of cooling the plasma by the trailing neutral gas is effectively solved, comprehensive improvement is brought to the aspects of system integration, operation reliability and economical efficiency, and the pre-ionization device is an efficient, practical and reliable pre-ionization solution.

The invention discloses a czochralski silicon thermal field and a single crystal furnace structure. The thermal field comprises a heater assembly, a middle-upper heat preservation and supporting assembly, a lower heat preservation and crucible supporting assembly and a water-cooling heat insulation assembly, and the heater assembly is fixed on a furnace cover. According to the thermal field structure, the structural form that all assemblies of an existing thermal field are arranged on the furnace bottom plate is changed, a thermal insulation and thermal field supporting structure of the thermal field is fixedly installed in the main furnace chamber, and a heater of the heater assembly is connected to the furnace cover. The heater assembly of the thermal field adopts a hoisting type design, corrosion of oxides to heater feet and copper electrodes is greatly weakened, the service life of the device is prolonged, an upper lifting mechanism is reduced and the time for cleaning the thermal field and replacing a crucible is shortened in cooperation with an open type structure of the furnace bottom of the single crystal furnace, so that the production efficiency is greatly improved, and the production cost is reduced. The safety is better, and the functionality is stronger.

The invention relates to the technical field of vacuum furnace electrode quick connection, in particular to a high-temperature vacuum furnace graphite electrode quick connection structure which comprises a copper bar, a furnace body electrode base, a copper end connecting piece, a graphite end connecting piece and a graphite lock nut. The detachable copper end connecting piece and the graphite end connecting piece are adopted to be connected with the water cooling copper electrode and the graphite special-shaped electrode respectively, the plane where the conductive end A of the copper end connecting piece and the plane where the conductive end B of the graphite end connecting piece are located are machined precisely, sufficient attachment is guaranteed, and the conductive requirement is met. And when the special-shaped electrode in the vacuum furnace is worn and needs to be replaced, the replacement operation can be completed only by quickly disassembling the single end in the vacuum furnace.

The invention discloses a zone-melting high-frequency coil with a water passing structure. A zone-melting method high-frequency coil with a water passing structure comprises a high-frequency coil, a first installation part and a second installation part which are arranged side by side are arranged on the high-frequency coil, the first installation part is detachably and electrically connected with the end of a copper electrode, and a water inlet in butt joint with an annular cooling channel is formed in the second installation part; the water inlet copper rod comprises a copper pipe part used for penetrating through the copper electrode and an exposed butt joint part used for exposing the copper electrode, and the exposed butt joint part is detachably connected with the second mounting part; the copper pipe part is sleeved with a first insulating ring, the first insulating ring abuts against the exposed butt joint part, and the first insulating ring is clamped between the water inlet copper rod and the copper electrode; the end, away from the exposed butt joint part, of the copper pipe part extends out of a copper electrode, and the end, away from the exposed butt joint part, of the copper pipe part is sleeved with a second insulating ring. A water inlet cooling system and a conductive function are realized, the service life of the high-frequency coil is prolonged, and the effect is improved.