999 results about "Metal particle" patented technology

The invention discloses a method for preparing a platinum-based alloy catalyst by using a plasma enhanced chemical vapor deposition low-temperature technology, relates to a preparation method of a platinum-based alloy catalyst, and aims to solve the technical problems that a carbon layer is not uniformly coated and metal particles of the catalyst are easy to agglomerate in a high-temperature calcination process in the existing platinum-based alloy catalyst prepared by carbon coating. The method comprises the following steps: 1, preparing Pt / C by a polyhydric alcohol reduction method; 2, pre-treating a Pt / C catalyst; 3, preparing M-Pt / C by a dipping evaporation method; 4, PECVD carbon shell coating is carried out; (5) alloying; and 6, removing a part of carbon shell to obtain the platinum-based alloy catalyst. When the Pt / C catalyst is used for preparing a membrane electrode of a proton exchange membrane fuel cell, the peak power density can reach 1.72-1.89 W / cm < 2 > under a hydrogen-air condition, which is improved by 20.3% and 32.2% compared with a membrane electrode of a commercial 20% Pt / C catalyst, and the Pt / C catalyst can be used in the field of proton exchange membrane fuel cells.

This water electrolysis electrode comprises a substrate and a catalyst portion. The catalyst portion includes Raney nickel particles and metal particles that contain nickel as a main component. The metal particles are in contact with the Raney nickel particles and include aluminum. The ratio of the total number of moles of aluminum to the total number of moles of nickel in the Raney nickel particles is greater than the ratio of the total number of moles of aluminum to the total number of moles of nickel in the metal particles.

The invention provides a method and system for detecting metal abrasive particle defects in lubricating oil, and the method comprises the following steps: scanning a lubricating oil sample collected by a machine by using a multispectral imaging system to obtain a two-channel image of a visible light wave band and a near-infrared wave band; the dual-channel image comprises a visible light image and a near-infrared image; respectively enhancing the visible light image and the near-infrared image, and carrying out fusion analysis on the enhanced images to obtain a dual-channel fusion image; performing window sliding on the dual-channel fusion image, and constructing a direction constraint factor; performing threshold segmentation on the dual-channel fusion image through a direction constraint factor to obtain an abrasive particle region; and an actual metal abrasive particle defect image is collected to analyze the abrasive particle area, and an identification result is obtained. By performing enhanced fusion identification on the visible light image and the near-infrared image and performing dual identification on the contour and the texture, the accuracy is improved, and the misjudgment rate is reduced.

The invention relates to the technical field of solar cells, in particular to copper-based paste, a TOPCon cell and a preparation method of the TOPCon cell. The copper-based slurry includes: copper powder as main powder densified in a sintering process to form a conductive phase; the hydrogen storage material is used for releasing a hydrogen element in the sintering process and locally forming a reducing atmosphere so as to prevent the copper powder from being oxidized; the hydrogen storage material comprises a liquid hydrogen storage material; and the organic carrier provides fluidity and thixotropy for the slurry. Compared with solid hydrogenated metal particles, the liquid hydrogen storage material can be more uniformly dispersed in the copper-based slurry and can coat the copper powder, so that the hydrogen element released from the copper-based slurry is more uniform, and the oxidation of the copper powder can be comprehensively inhibited. Meanwhile, the dehydrogenation amount of the liquid hydrogen storage material is far higher than that of the solid hydrogenated metal particles, the release amount of hydrogen elements can be increased by multiple times under the same mass, and then more sufficient oxidation protection is provided for the copper powder.

The utility model relates to a metal powder injection machine which comprises a supporting frame, an injection mechanism and a feeding hopper, the injection mechanism is arranged on the supporting frame, the feeding hopper is communicated with the injection mechanism, the metal powder injection machine further comprises a stirring rod and a driving rod, a feeding port is formed in the top of the feeding hopper, and the stirring rod is connected with the feeding port. The stirring rod is arranged on the top face of the feeding hopper and rotationally connected with the feeding hopper, a plurality of stirring blades are evenly distributed on the outer wall of the position, located in the feeding hopper, of the stirring rod, and the driving rod and the stirring rod are arranged in a linkage mode. The utility model provides the metal powder injection machine which can stir and loosen metal particles in the feed hopper when the metal particles are blocked.

The invention relates to the technical field of steel strip trimming, and discloses a steel strip trimming device for stainless steel strip cold rolling, which comprises a workbench and an adaptive base plate. When a steel belt with the conventional thickness is treated, the two guide rollers work cooperatively, waste materials and the steel belt are guided stably, the waste materials are conveyed out through the limiting rollers, the steel belt enters the follow-up process smoothly, and efficient and stable conventional production is ensured; when a thick steel belt is cut, an overturning motor is started to enable the two guide rollers to rotate, the first guide roller jacks the steel belt to move upwards to an inclined friction plate on the side wall of the cutting piece, burrs are fully polished, and the pressing rollers are synchronously limited to guarantee uniform polishing; the second guide roller presses the waste downwards and forms opposite acting force with the first guide roller to generate shearing force, cutting resistance is reduced in cooperation with the cutting blade, the cutting efficiency is improved, the polished steel belt and the waste are guided by the second guide roller to enter a workbench water tank to be cleaned, chippings, impurities and metal particles are effectively removed, and it is guaranteed that the steel belt is clean. The influence of waste residues on subsequent treatment is avoided.

The invention provides a solar cell and a photovoltaic module, and relates to the field of photovoltaic technology. The solar cell includes: a silicon substrate including a first surface and a second surface opposite to each other in a thickness direction of the silicon substrate; the first doping layer and the first passivation layer are sequentially arranged on the first surface; the first seed layer penetrates through the first passivation layer and is electrically connected with the first doping layer, the first base metal layer covers the first seed layer, the first base metal layer is electrically connected with the first doping layer through the first seed layer, and the first seed layer is of a honeycomb structure comprising a plurality of first holes; the first base metal layer comprises a plurality of first metal particles; an interface between the first base metal layer and the first seed layer includes a plurality of interface regions, and in a first interface region of the plurality of interface regions, the first metal particles are filled in the first holes. According to the invention, the cost of the battery is reduced, the conductivity, the drawing force and the structural stability of the electrode structure are improved, and recombination is reduced.

The invention relates to a powder detection method, system and device, a storage medium and a program product. The method comprises the following steps: determining a reference moving speed of a material carrying mechanism according to a signal coverage range of an electromagnetic wave generator and a preset moving time length of powder to be detected in the signal coverage range, and controlling the material carrying mechanism for carrying the powder to be detected to move according to the reference moving speed, controlling the electromagnetic wave generator to emit an electromagnetic wave signal to the to-be-detected powder at the position where the to-be-detected powder reaches the electromagnetic wave generator on the material carrying mechanism, and acquiring an infrared signal generated by the to-be-detected powder and received by the infrared detector at the position where the to-be-detected powder reaches the infrared detector on the material carrying mechanism; the detection result of the metal particles in the powder to be detected is determined according to the infrared signal; the electromagnetic wave signal is used for heating metal particles in the to-be-detected powder; according to the method, the detection sensitivity is improved, and the risks of missing detection and error detection are correspondingly reduced.

The invention relates to the technical field of data processing, in particular to an AI large model multivariate data fusion method and system based on multiple modalities, and the method comprises the steps: collecting multi-source data; performing classification abnormity judgment; abnormal type identification; calculating severity; switching fusion modes; and outputting an alarm. According to the method, parameters such as the spindle temperature, the rotating speed fluctuation rate, the vibration acceleration, the current load, the acoustic emission energy spectrum peak value, the cutting force variance and the cooling liquid metal particle concentration are acquired and fused step by step in multiple dimensions in the machining process of the numerical control machine tool, so that the running state of the machine tool is dynamically sensed from multiple angles; furthermore, the physical essence of tool wear and material peeling is revealed through the coupling relationship between the cutting force variance and the metal particle concentration, and meanwhile, the dynamic stability change of the machine tool structure is captured by combining the spindle rotating speed fluctuation ratio; the problem that state monitoring is not accurate in the numerical control machining process due to data isolation and fusion strategy staticization is effectively solved.

The invention relates to an observation device and method for simulating GIS equipment switch action metal particle motion, the device comprises a GIS simulation cavity, a vibration applying mechanism and a particle observation mechanism, the vibration applying mechanism applies mechanical vibration to the GIS simulation cavity; the particle observation mechanism collects the motion trail of the metal particles in real time. According to the device, the vibration of a shell is actually measured by means of a vibration detection mechanism when GIS equipment is switched on and off, mechanical vibration and transient overvoltage conditions generated by the GIS equipment switching on and off operation are equivalently simulated by means of a vibration applying mechanism and a voltage applying mechanism, and the movement conditions of sunken metal particles are recorded in the whole process by means of a particle observation mechanism. Furthermore, the influence of the GIS equipment vibration parameters on metal particle escape is quantitatively analyzed, the influence mechanism of the GIS equipment switch operation on the sinking particle escape phenomenon is obtained, and an important research basis and data support are provided for an optimization scheme for suppressing sinking particle movement under the GIS equipment switch operation.

The invention relates to a preparation method of a ceramic-based composite material, in particular to a preparation method of a ceramic-based composite material with a pyrolytic carbon-carbon nanotube interface, which is used for solving the problem that in the aspect of improving the thermal conductivity of an interface layer, metals such as Fe, Co, Ni and the like are widely used as catalysts for growing carbon nanotubes at present, so that the thermal conductivity of the interface layer is improved. Carbon nanotubes obtained through a traditional preparation method are prone to agglomeration and uneven in distribution, the risk of the preparation process is high, the carbon nanotubes are not suitable for large-scale production, although metal particles can be reduced through a chemical plating method, the particle sizes of the metal particles are not controlled, the distribution of the metal particles is uneven, and the requirement of a chemical vapor reduction method for distribution of an earlier-stage metal salt solution is high. And the defect is difficult to realize easily. According to the preparation method of the ceramic-based composite material with the pyrolytic carbon-carbon nanotube interface, the ceramic-based composite material with the pyrolytic carbon-carbon nanotube interface is finally obtained through pretreatment, solution A preparation, metal salt solution in-situ reduction and chemical vapor deposition in sequence.

The invention discloses a hydrogen energy fuel cell catalyst carrier based on a graphene graft polymer, which is characterized in that two-dimensional graphene is used as a substrate, the surface of the two-dimensional graphene is modified with an oxygen-containing functional group, and a functional polymer branch chain containing nitrogen, sulfur or phosphorus heteroatoms is covalently grafted to form a local three-dimensional network winding structure; the carrier is loaded with platinum, palladium, ruthenium and other metal or alloy nanoparticles, the particle size is 2-8 nm, the loading capacity is 10%-40%, and the particles are anchored to polymer functional sites or reduced in situ to a graphene defect area through coordination. A polymer branch chain has pH responsiveness and can adjust the local proton transmission efficiency; the grafting density is 3-15 grafting points per 100 carbon atoms, so that high dispersion and stable anchoring of metal particles are effectively realized; the specific surface area of the carrier is 400-800m < 2 > / g, the electrochemical active area is not less than 80m < 2 > / g, and the activity retention rate is greater than 80% after 5000 circles of accelerated durability tests. The activity, the stability and the proton conduction performance of the catalyst are remarkably improved, and the catalyst is suitable for high-performance fuel cells.

A metal-supported catalyst, a battery electrode, and a battery, each having both excellent catalytic activity and durability. The metal-supported catalyst includes: a carbon carrier; and platinum particles serving as catalyst metal particles supported on the carbon carrier, wherein the platinum particles contain pure platinum particles and platinum alloy particles, wherein a proportion of a weight of the pure platinum particles to a sum of the weight of the pure platinum particles and a weight of the platinum alloy particles is 15% or more and 61% or less, and wherein a ratio of a proportion of a nitrogen atom content to a carbon atom content measured by elemental analysis using a combustion method, to a proportion of a nitrogen atom content to a carbon atom content measured by X-ray photoelectron spectroscopy, is 1.05 or more.

The invention relates to the technical field of super-hydrophobic materials, and particularly discloses a super-hydrophobic coating spraying liquid, a preparation and construction method thereof and a super-hydrophobic coating. The super-hydrophobic coating spraying liquid provided by the invention is prepared from the following components: nano SiO2 which is modified by a silane coupling agent containing amino / alkoxy and a silane coupling agent containing long fluorine chain / long-chain alkane step by step, microcapsules which are sequentially modified by the silane coupling agent containing amino / alkoxy and a dispersing agent for the second time, and a solvent which is added into the microcapsules, and a thermosetting resin. The nano SiO2 and the microcapsules which are subjected to multiple modification have good hydrophobicity, and nano metal particles loaded in the microcapsules form an anti-algae active center of the super-hydrophobic coating. And the super-hydrophobic coating prepared by using the super-hydrophobic coating spraying liquid organically combines hydrophobicity and an anti-algae active center together, so that an efficient and long-acting anti-algae effect can be realized, and the problems of short pollution flashover prevention time and poor algae removal performance of the existing super-hydrophobic coating are solved.

The invention provides an electroplating strengthening method for an aluminum alloy wheel. The electroplating strengthening method comprises the following steps: forming a periodic microstructure on the surface of the aluminum alloy wheel by utilizing a laser micro-etching technology; immersing the wheel into a supercritical carbon dioxide cleaning system to clean oil stains and oxidation films; after cleaning, spraying an active coating containing nano titanate; a high-compactness plating layer is formed in a pulse current electroplating mode; a chemical nickel-phosphorus plating layer and a hard chromium plating layer containing nano metal particles are sequentially formed on the surface of the wheel; performing hole sealing treatment on the electroplated layer by using low-temperature plasma; and coating and curing a flexible UV coating containing an ultraviolet light absorber on the surface of the electroplated layer to form the anti-aging protective film. According to the invention, a novel double cleaning-activating step is adopted in the pretreatment process, and special pre-plating passivation treatment is combined, so that tight combination of an electroplated layer and an aluminum alloy substrate is ensured, and the adhesive force grade reaches 5B, which is obviously superior to that of a traditional process.

The invention discloses a split type gas shielded welding machine, and relates to the technical field of welding machines, the split type gas shielded welding machine comprises a bottom plate, a welding power source is arranged on the top of the bottom plate close to the edge of one side, one end of the welding power source is coupled with an equipment welding gun through a wire, and a gas tank used for conveying shielding gas to the welding gun is arranged on the top of the bottom plate close to the center. When the ship body welding device is used and before a ship body is welded, due to the fact that many impurities and metal particles exist on the surface of the ship body, in the welding process, firstly, the impurities on the surface of the ship body are cleaned through rotation of cleaning equipment, meanwhile, the surface of the ship body is heated through an infrared heating pipe, the follow-up ship body welding quality is improved, and meanwhile, the welding efficiency is improved. The two negative pressure pumps are started, negative pressure is generated in the dust collection bin, cleaned impurities are collected into the dust collection bin under the action of pressure difference to be collected, and through the action of the pretreatment assembly, the split type gas shielded welding machine integrates pretreatment, cleaning and welding.

The invention relates to the technical field of photoelectrocatalysis, and aims to provide a Ta3N5-based photoelectrode based on a vapor deposition technology and a preparation method of the Ta3N5-based photoelectrode. According to the photoelectrode, quartz glass serves as a substrate, and the substrate is provided with a multi-layer film structure which is formed on the basis of magnetron sputtering, electron beam evaporation, thermal nitriding treatment, electrochemical deposition and coating; the multilayer film structure sequentially comprises a first Ti metal layer, a Pt conductive metal layer, a Ti < x > Al < y > alloy layer, a Ta3N5 layer, a NiFeCoOz cocatalyst layer and MNPs nano metal particles from bottom to top. The use amount of precious metal can be greatly saved, the preparation cost is reduced, and the application range is expanded; the mobility of photoelectrons can be improved, the transport of photon-generated carriers can be improved, and the photoelectric utilization efficiency can be greatly improved; and the energy loss between two photo-thermal application interfaces is greatly reduced, so that the photo-thermal utilization efficiency of the single photoelectrode is improved.

The invention discloses a granular catalyst and a preparation method thereof, and belongs to the technical field of chemical engineering. The preparation method of the granular catalyst comprises the following steps: S1, mixing raw materials containing a carbon material, an active metal material and a solvent to form slurry; s2, the slurry serves as a cathode in an electrode system and is subjected to pulse electrodeposition treatment, and active metal is deposited on the surface of a carbon material to form a particle catalyst; the electrode system is a two-electrode system; an anode in the two-electrode system comprises a dimensionally stable electrode, and an anode electrolyte is a sulfuric acid solution; and the two electrode systems are electrode systems in a flow battery stack structure. According to the preparation method, a flowing slurry and pulse electrodeposition combined method is adopted, so that metal particles are uniformly and stably loaded on a carbon material carrier, and gt is obtained within one-time preparation time of 1h; according to the method, laboratory-scale continuous synthesis of the granular catalyst is realized, and the method is simple in preparation process, mild in reaction condition and high in controllability.

The present invention relates to the technical field of metal production or refining, and provides a non-ferrous metal smelting slag recovery and treatment system and method, the method comprising: performing reduction activation treatment on the molten slag, cutting the slag flow by a guide plate and combining mechanical vibration to strengthen the reduction reaction; using ultrasound and gradient magnetic fields to collaboratively sort metal particles; forming a vortex flow field by a rotating spray gun to achieve directional alloy precipitation, and continuously discharging the alloy melt; converting the tailings into glassy building aggregates; recovering the waste heat and quenching the flue gas, using a high-temperature resistant filter bag to capture zinc-containing dust, and then removing sulfides and heavy metals through a graded absorption process. The system comprises an activation reactor, a sorting tower, a precipitation furnace, and a flue gas treatment unit, and each device realizes the collaborative treatment of molten materials through a sealed conveying structure. The present invention realizes the efficient dissociation and recovery of valuable metals, the full-quantity resource utilization of tailings, and the control of the depth of flue gas pollution, significantly improving the resource circulation efficiency and environmental friendliness.

The invention provides a Co (at) CeO2-x heterogeneous catalytic electrode as well as a preparation method and application thereof. The Co-coated CeO2-x heterogeneous catalytic electrode comprises foamed nickel and an electrocatalyst loaded on the surface of the foamed nickel, and the electrocatalyst comprises metal Co particles and CeO2-x with oxygen vacancy. The Co (at) CeO2-x heterogeneous catalytic electrode provided by the invention is prepared only through a process combining a room-temperature electrodeposition method and an air calcination method, has a three-dimensional self-supporting integrated structure, and also has a heterostructure and a porous nanosheet structure, so that more reaction active sites can be exposed, the interface charge transfer capability can be improved, and the catalytic performance can be improved. And the composite material has excellent activity and stability when being used as a cathode and an anode in the application of preparing formate and hydrogen by electrolyzing water under the assistance of glycerol.

The invention provides a method and a device for laser-induced plasma assisted preparation of a stripe structure. The method comprises the following steps: S1, building a laser processing system; s2, a metal target material is placed on a displacement workbench, and the transparent hard and brittle material is located above the metal target material; s3, a laser beam emitted by a laser passes through an objective lens and the transparent hard and brittle material and then is focused on the metal target material, metal plasma transferred to the back face of the transparent hard and brittle material is induced, metal particles are deposited on the back face of the transparent hard and brittle material through the metal plasma, and laser irradiates the metal particles to excite surface plasmons, the surface plasmon interferes with incident light, so that a periodic nano stripe structure is formed; s4, the laser beam is controlled to conduct machining on the surface of the transparent hard and brittle material according to the preset machining parameters and the scanning path; and S5, the transparent hard and brittle material processed in the step S4 is placed in an absolute ethyl alcohol solution to be subjected to ultrasonic cleaning and drying.

The invention discloses a method for connecting a skutterudite thermoelectric material and an electrode by using a high-entropy alloy and low-expansion-coefficient particle composite barrier layer, and relates to a method for connecting the skutterudite thermoelectric material and the electrode. The method aims at solving the problems that an existing conductive connector for connecting a skutterudite thermoelectric material and an electrode through a barrier layer is large in thermal stress and prone to cracking. The method comprises the steps that composite powder of high-entropy alloy and low-expansion-coefficient particles is prepared through a mechanical mixing method; and preparing the high-entropy alloy and low-thermal-expansion-coefficient particle composite barrier layer by adopting a sintering method. And then the barrier layer, the skutterudite thermoelectric material and the electrode are connected into a conductive joint through a diffusion welding or brazing method. The materials of the low-expansion-coefficient reinforced particles comprise but are not limited to low-expansion metal particles, graphite and the like; the components of the high-entropy alloy matrix material comprise, but are not limited to, an Al-Co-Cr-Fe-Ni system, an Fe-Co-Ni-Cu system, an Hf-Nb-Ta-Ti-Zr system and the like. The skutterudite thermoelectric material and the electrode are connected through the composite barrier layer of the high-entropy alloy and the low-expansion-coefficient particles, and the obtained conductive connector has high mechanical strength, a low-resistance interface and excellent thermal stability at the same time. The method is suitable for connecting the skutterudite thermoelectric material and the electrode.

The invention discloses an integral forming process of a square shaft rocker arm, which comprises the following steps: mixing metal powder and an organic binder according to an accurate proportion, and heating and stirring to form uniform feed; preparing the uniformly mixed feed into granules; a corresponding mold is designed according to the shape and size of the square shaft rocker arm; feeding the granular feed into an injection molding machine, injecting the granular feed into a preset mold under high-temperature and high-pressure conditions, and gradually removing the binder in the green body through a thermal degreasing method; putting into a high-temperature sintering furnace, and heating to a high temperature below a metal melting point in vacuum, so that metal particles are fused to form a compact structure; quenching, tempering and other processes are conducted on the sintered square shaft rocker arm, and electroplating treatment is conducted on the surface of the square shaft rocker arm; the method has the beneficial effects that the compactness and the mechanical property of the product are remarkably improved by utilizing a metal injection molding technology, and the service life of the product is far beyond that of a conventional part.

The invention provides an anti-slag-flying ball mill lining plate wear resistance detection mechanism, and belongs to the technical field of material performance testing. Comprising a bottom cabinet, a cabinet body is arranged at the top end of the bottom cabinet, a control panel is arranged on one side of the bottom cabinet, a hollowed-out plate is arranged at the top end of the bottom cabinet, a workbench is installed on the inner side of the cabinet body, and the sand blasting assembly is installed on the inner side of the cabinet body. According to the device, the adjusting assembly is arranged, the overturning table can overturn on the workbench along with rotation of the sand blasting gun, the device is used for simulating spraying impact of steel balls on the side wall of the lifted lining plate in the rotation process of the ball mill, it is ensured that when the lining plate is in an inclined state, the lining plate is not prone to falling off, and the lining plate is not prone to falling off. And the wear-resistant impact strength of different point positions can be detected, and the situation that the wear-resistant strength of the changed distance between the sand blasting gun and the lining plate cannot be detected is avoided.

The invention discloses a coating for a chemical plating process and a preparation method of the coating, and belongs to the field of three-dimensional precision machining. The coating is arranged on the surface of a base material, and based on the mass percentage of the coating, the coating comprises 55%-85% of a cross-linked product of an epoxy resin AB agent, 1%-5% of nano metal particles and 10%-40% of water-soluble polymers. The coating is adopted for a chemical plating process, the process steps are few, and the binding force between a metal circuit and a base material in the prepared three-dimensional interconnection molding device is excellent.

The invention discloses a signal diagnosis method based on multi-parameter signal fusion, relates to the technical field of signal diagnosis, and solves the problem that the signal diagnosis result is not accurate enough due to the fact that the internal relation of partial discharge signals of parameters and the cooperation effect of the parameters on signal diagnosis are not considered in the prior art. The method comprises the following steps: firstly, performing anti-interference processing on multi-parameter partial discharge signals of metal particles in different existence states based on a wavelet transform method, and extracting time-frequency domain and spatial features of the multi-parameter partial discharge signals to obtain a feature data set of partial discharge key features of the metal particles; a single classifier diagnosis identification algorithm of each parameter partial discharge signal is obtained by using a single classifier; obtaining a classification result of each parameter partial discharge signal; and finally, fusing the diagnosis and identification results of the partial discharge signals of the parameters by using fuzzy integration. In a word, according to a final diagnosis and recognition result, data of the three sensors can be well fused, so that advantage complementation is realized, and the accuracy and reliability of detection are remarkably improved.

A conductive slurry, which comprises: a) conductive metal particles, b) a glass powder, c) a laser thermal promoter, and d) an organic carrier, wherein the laser thermal promoter is represented by formula (I): ZrxCuyAlmNizNbnAq(I), where x=10-90 wt%, y=5-50 wt%, m=0.5-10 wt%, z=0-20 wt%, n=0-15 wt%, and q=0-5 wt%; A is a metal selected from Ag, Cr, Zn and Ti; and the weight percentages are based on the weight of the laser thermal promoter. Further provided is another conductive slurry, which comprises: a) conductive metal particles, b) a glass powder, c) a reducing additive, and d) an organic carrier, wherein the reducing additive is represented by formula (I): ZrxCuyAlz (I), where x=10-90 wt%, y=5-50 wt%, z=5-20 wt%, and the weight percentages are based on the weight of the reducing additive. Also provided are an electrode formed by sintering the conductive slurry, and a crystalline silicon solar cell comprising a substrate and the electrode bonded to the substrate.

The invention discloses a Pt-based molecular sieve dehydrogenation catalyst as well as a preparation method and application thereof. According to the catalyst, a molecular sieve is used as a carrier, Pt is used as an active component, one of Fe, Co, Ni, Cu, Zn and the like is used as an auxiliary component, and one of Na, Mg, K, Ca and Cs is used as an alkali metal component. The preparation method comprises the following steps: firstly, carrying out thermal activation treatment on a carrier, then carrying out secondary ball milling treatment to improve the accessibility of metal particles and carrier defect sites, and further chemically inducing the carrier defect sites and the metal particles to form stable chemical bonds through high-energy mechanical force, so as to enhance the metal-carrier interaction. And stabilizing active metal sites through high-temperature oxidation and reduction treatment, thereby obtaining the dehydrogenation catalyst with high activity and high stability. According to the method, the use of a solvent is avoided, the synthesis steps are simplified, and the method is an environment-friendly, simple, economical and efficient catalyst synthesis method.

The application belongs to the technical field of catalysts, and relates to a supported molybdenum carbide catalyst, which comprises a carrier and an active component; the carrier is MY molecular sieve, and the active component is molybdenum carbide; M is one or two of Co, Ni and Cu. A preparation method thereof is also disclosed, in which a molybdenum source solution is mixed with MY molecular sieve, dried, calcined, and then carbonized in a reducing mixed gas atmosphere to obtain the supported molybdenum carbide catalyst. The Y molecular sieve has good hydrothermal stability, a typical microporous structure, a large specific surface area, and can better disperse the active substance, so that more active components are exposed on the surface and participate in the reaction, and at the same time, smaller and more dispersed metal particles are obtained, which can effectively avoid the contact between the metal particles and the molybdenum carbide; on the other hand, the metal M is beneficial to H2 activation, improves the H2 dissociation capacity, and is helpful to remove the hydroxyl groups remaining on the surface of the molybdenum carbide during the reaction.

The invention discloses high-nickel stainless steel rolling equipment with a tension control function, and relates to the technical field of rolling equipment.The high-nickel stainless steel rolling equipment comprises a base, a first motor, a gearbox, a first connecting shaft, a second connecting shaft, a rolling device, a cleaning device and a deviation rectifying device.The rolling device can conduct fine adjustment on a roll gap of a rolling mill in time, and steel is kept to be stressed evenly; the cleaning device can adsorb and remove dust, impurities and fine metal particles attached to raw materials through static electricity before rolling is started, meanwhile, when equipment is shut down or the rolling procedure is intermittent, self-cleaning can be conducted, the cleaning efficiency in the next use process is guaranteed, and the deviation rectifying device can automatically rectify the dust, the impurities and the fine metal particles before the raw materials enter a rolling area through the conveying device. And the rotating angle and pressure of the conical roller can be automatically adjusted through the conical roller during transportation deviation, so that raw materials are gradually returned to a correct conveying path, and the defects of non-uniform rolling thickness, edge wave shape or plate shape caused by incorrect position are avoided.