25results about How to "Reduce microcracks" patented technology

This utility model discloses a fixture for processing a nozzle green blank, including a fixed base; an arc-shaped sliding base that can slide along the arc-shaped fixed base in a first direction under the drive of a first driving component, the arc-shaped sliding base including a first plane abutting against the lower end face of the arc-shaped nozzle green blank. Two arc-shaped clamping bases are provided and respectively connected to corresponding second driving components. The arc-shaped clamping bases can slide along a second direction under the drive of the corresponding second driving components and can move synchronously with each arc-shaped sliding base. Each arc-shaped clamping base includes an arc surface located above the first plane of the arc surface and abutting against the side wall of the arc-shaped nozzle green blank. The arc surface and the first plane of the arc surface form a clamping cavity for clamping the arc-shaped nozzle green blank. The fixture satisfies the clamping force while reducing damage to the nozzle green blank and facilitating concentricity adjustment.

The utility model relates to an arc-angle drill bit, which comprises a supporting seat, an arc-angle drill bit and an arc-angle drill bit, the multiple arc angle drill bits are arranged on the circumference and are all fixed to the supporting base, and cutting edge parts of the arc angle drill bits are arranged to be in a wave shape; and the multiple discharging holes are formed in the end face of the supporting base. According to the drill bit, the arc-angle drill bit is arranged, and the arc cutting edge of the arc-angle drill bit can disperse cutting stress and reduce the risk of edge tip cracking during drilling, so that the service life of the drill bit can be prolonged, the number of times of drill bit replacement can be reduced, burrs and microcracks on the edge of a drilled hole can be reduced, and the hole wall roughness can be reduced. The supporting seat and the arc-angle drill bit are made of steel, so that the impact resistance is high during drilling, tipping is not easy to occur under intermittent cutting, the price is lower than that of a sintered drill bit, and the practicability is improved.

The utility model discloses a printing carrier plate and a photovoltaic cell, and belongs to the technical field of photovoltaic cells. The printing support plate comprises a support plate body and a film layer arranged on the surface of at least one side of the support plate body, and the film layer comprises at least one of a metal film layer and a polymer film layer; the printing carrier plate further comprises a groove array, and the groove array penetrates through the film layer and extends to the carrier plate body in the thickness direction of the printing carrier plate. According to the utility model, the quality of groove laser etching can be improved.

The utility model relates to the technical field of glass bending, and provides a glass bending assembly which comprises a deformation bending mechanism used for bending glass and changing the shape and a driving mechanism connected with the deformation bending mechanism. When the glass is bent, the driving mechanism drives the deformation bending mechanism to move towards the bending direction of the glass; and after the glass is bent, the driving mechanism drives the deformation bending mechanism to reset. The deformation bending mechanism can adjust the self structure in real time according to the actual bending form of the glass, and the problem of stress concentration caused by the fact that a traditional rigid bending mechanism cannot adapt to glass deformation is effectively solved. The dynamic adaptive mechanism obviously improves the bending precision, is particularly suitable for forming processing of bending the glass at 90 degrees, and meanwhile, reduces the risk that the glass cracks or is damaged in the bending process.

The present application relates to the technical field of silicone rubber material, in particular to a sericite modified silicone rubber material and a preparation method thereof.The present application overcomes the problems of poor dispersion of sericite in the organic silicon matrix and poor compatibility of fluorosilicon and common silicon.The silicone rubber material is prepared from polysiloxane hybrid base glue prepared by in-situ polymerization of fluorine-containing / ethenyl double modified sericite, fluorosilicon raw rubber, methylphenylvinyl silicone rubber, MQ silicone resin, hydrogen-containing silicone oil and vulcanizing agent;the preparation process involves double functional group grafting on the surface of sericite, monomer in-situ ring-opening polymerization coating, multiphase blending to build interpenetrating network and hydrogen-containing silicone oil chain extension to cooperate with gradient vulcanization, through building a rigid-flexible stereo enhanced network, the material is endowed with excellent oil resistance, heat resistance and high mechanical strength, and can be used in the field of automobile manufacturing.

The application discloses in-situ growth coated catalytic proppant and a preparation method and application thereof, and the preparation method of the proppant comprises the following steps: dispersing a proppant matrix in a salt solution containing one or more transition metal precursors to form a solid-liquid suspension system; adding a precipitator to the suspension system to induce in-situ heterogeneous nucleation and growth of the metal precursors on the surface of the proppant matrix, thereby forming a precursor-coated proppant with a core-shell structure; and performing high-temperature calcination on the precursor-coated proppant to obtain the in-situ growth coated catalytic proppant. The application utilizes in-situ growth and high-temperature reactivity sintering technology to construct a firm high-entropy ceramic catalytic film on the surface of the proppant, thereby solving the problems that a traditional impregnated proppant coating is easy to fall off and has poor temperature resistance; meanwhile, the high-entropy effect and lattice oxygen vacancies are utilized to achieve a technical breakthrough that the proppant can efficiently catalyze thick oil viscosity reduction without an organic modifier.

The invention relates to the technical field of solar photovoltaics, in particular to a monocrystalline silicon multi-section rod adhesive as well as a preparation method and application thereof. The monocrystalline silicon multi-section rod adhesive provided by the invention is prepared from the following components in parts by weight: 100 parts of a curing agent, 20 to 30 parts of an alkaline activator, 0.5 to 2 parts of nano filler, 2 to 4.5 parts of a retarder, 3 to 6 parts of a water reducing agent and 5 to 10 parts of water, wherein the curing agent comprises an amorphous silicon-aluminum compound. The monocrystalline silicon multi-section rod adhesive disclosed by the invention can be used for effectively adhering monocrystalline silicon base materials together, the hardness of the adhesive after curing is close to that of silicon, and the adhesive has excellent temperature resistance; when the monocrystalline silicon multi-section rod adhesive is used for cutting a monocrystalline silicon multi-section rod obtained by splicing monocrystalline silicon base materials, the manual dependence degree can be reduced, the cutting efficiency is improved, the utilization rate of raw materials is greatly improved, and the quality of a silicon wafer obtained by cutting is improved.

The utility model relates to a high-precision horizontal swing spraying device which comprises spraying assemblies arranged in a machine frame in a vertically symmetrical mode, the spraying assemblies do reciprocating motion in the machine frame in the transverse direction, a spraying area is arranged between the two spraying assemblies, a plurality of spraying heads facing the spraying area are obliquely arranged on the spraying assemblies, and the spraying assemblies are arranged on the machine frame. And the spray head is used for spraying liquid to the spraying area. According to the high-precision horizontal swing spraying device, through the combination of the reciprocating spraying assembly and the inclined spraying head, dynamic covering is achieved, the problem of liquid accumulation or a blind area caused by a fixed spraying head path is avoided, liquid can cover the surface of a material more uniformly, the spraying precision and efficiency are improved, local defects are effectively reduced, and the spraying quality is improved. The influence on the surface treatment precision due to non-uniform liquid flow distribution is avoided.

The application discloses a kind of design and manufacture method of printed circuit board inner layer circuit, the design and manufacture method includes: determining drilling parameter, and the basic size of connection PAD is set based on drilling parameter;Tear drop-shaped gradual widening structure is generated in the transition area of connection PAD and inner layer circuit, the structure of heat dissipation PAD is designed synchronously, and inner layer circuit wiring design is completed;Form inner layer circuit film, and check film;At the same time, pre-treatment is carried out to PCB inner layer substrate;The pattern is formed by aligning the film that passes the check with inner layer substrate;Substrate is etched;The substrate after etching is cleaned, and unqualified product is identified and screened, and the qualified product is inner layer circuit product.The application solves the problem of weak connection and easy breakage of PTH hole and inner layer circuit in high-density PCB through the three-in-one technical route of structure optimization+process synergy+precision control, and improves the mechanical strength, electrical reliability and thermal management capability of the product.

This utility model relates to the technical field of printed circuit board processing equipment, and discloses a fixture and auxiliary tooling for avoiding jamming of thin plates. It includes a plate body with clamping edges for holding the thin plate; a plurality of first clamping pieces spaced apart from the clamping edges; and a plurality of second clamping pieces corresponding to the first clamping pieces, each second clamping piece being positioned at a first preset distance from one side of the first clamping piece. The length of the second clamping piece is greater than that of the first clamping piece. The second clamping pieces are used to bend and engage with a worktable to clamp the thin plate between the first clamping pieces and the second clamping pieces. This design solves the problem of deformation, jamming, and even breakage of thin plate parts during clamping and transportation.

The application discloses a preparation process of BR micropowder for the semiconductor industry, adopts liquid nitrogen low-temperature crushing to reduce micro-powder cracks and agglomeration, carries out gravity sedimentation-gradient magnetic separation grading, cooperates with dilute nitric acid-hydrofluoric acid mixed acid liquid deep impurity removal, and then carries out vacuum high-temperature reduction treatment and argon plasma activation, and sequentially deposits SiN x The transition layer and the diamond film form a composite film, and finally, the BR micropowder product is obtained through vacuum annealing and airflow grading. The BR micropowder prepared by the application has high purity, low total amount of metal impurities, small particle size distribution deviation, significantly reduced surface roughness, uniform particle strength, can effectively reduce chip processing scratch, edge collapse and metal pollution risk, and meets the high-precision and high-cleanliness requirements of high-end semiconductor cutting, grinding and polishing.

This application discloses a dielectric gradient coating for insulating separators, its preparation method, and its application, belonging to the technical field of electrical equipment insulation materials. The method includes the following steps: (1) adding ethylenediamine and perfluorooctyltrimethoxysilane to a solvent to obtain a modified solution, and then adding nano-graphene to the modified solution to obtain fluoroammonia-modified graphene; (2) mixing the first and second dispersions prepared from the fluoroammonia-modified graphene and magnesium-aluminum hydrotalcite respectively to obtain electrostatic spraying liquids with different concentration gradients; (3) sequentially electrostatically spraying the electrostatic spraying liquids with different concentration gradients onto the surface of the separator to form a dielectric gradient coating, wherein the dielectric constant in the dielectric gradient coating increases from the inside to the outside. In this method, the fluoroammonia-modified graphene is uniformly dispersed in epoxy resin and improves the density of the epoxy resin, thereby increasing the bonding force between the coating and the substrate, and thus improving the service life of the insulating separator under high temperature and high humidity conditions.

The invention provides a zinc-containing positive electrode active material and a preparation method thereof, a positive plate and a battery. The positive electrode active material comprises a zinc-containing positive electrode active material matrix and an oxide coating layer which coats the surface and comprises trivalent metal elements, a Zn element is doped in a zinc-containing positive electrode active material matrix, and an anti-position defect is introduced, so that the structural stability is improved; according to the zinc-containing positive electrode active material, a core-shell + concentration gradient structure is adopted, a first circular ring region (with the Zn content of 0.2-3%) serves as a transition layer, the concentration change between a sphere center region (with the Zn content of 0.3-6%) and a second circular ring region (with the Zn content of 0-1%) is smoothed, Zn element dissolution is reduced, and cracking caused by too large deformation difference of materials in a Zn-rich region and a Zn-poor region during charging and discharging can also be avoided. In addition, the oxide coating layer can capture dissolved Zn ions, and Zn element dissolution is further reduced. The synergistic effect improves the cycle life of the material and the battery capacity retention ratio.

The utility model discloses a closestool with high flushing cleanliness, belongs to the technical field of closestools, and aims to solve the technical problems that the hydraulic power is dispersed, dirt is easy to remain and the cleaning difficulty is high when the conventional closestool is used for flushing. According to the technical scheme, the top of a closestool body is rotationally provided with an annular cushion, and the cushion is made of food-grade silica gel materials and can slow down heat loss of the human body; a funnel-shaped bucket pool which extends towards the bottom and gradually shrinks inwards is arranged in the bucket body, the shrinking process is transited through a smooth curve, a drain outlet in the bottom end is upwards inclined, and an S-shaped drain pipe is integrally formed at the drain outlet; according to the funnel-shaped barrel pool and the S-shaped blow-off pipe, the surface of a wear-resistant matrix made of a high-density microcrystalline ceramic material is uniformly covered with a fluorocarbon hydrophobic coating isolation layer, and 3% of carbon fibers are added into the wear-resistant matrix. The closestool can form concentrated powerful water flow, the flushing cleanliness is high, sewage splashing is avoided through the sewage outlet, the seat cushion provides comfortable sitting feeling, and the closestool is durable and easy to clean.

The utility model relates to a toughened glass technical field, more particularly, relate to a kind of low emissivity hollow toughened glass, low emissivity hollow toughened glass includes the first toughened glass plate and the second toughened glass plate of parallel arrangement, and hollow cavity is formed therebetween and fills inert gas.Sealing assembly is arranged around hollow cavity perimeter side, and the core is frame spacer.First wing plate and second wing plate are respectively extended out in frame spacer two sides, first wing plate abuts first toughened glass plate, and second wing plate abuts second toughened glass plate.Frame spacer is close to one side of hollow cavity and sets up sealant layer, and it is set up structural adhesive layer in the side away from hollow cavity, and the design of the first wing plate and second wing plate's spring piece, can be actively adapted to glass plate thermal expansion and cold shrinkage deformation by self elastic bending, greatly reduce the risk that sealing area produces microcrack or gap due to repeated temperature change.Obvious promotion glass in complex thermal environment under long-term sealing reliability and service life.

The present invention relates to the technical field of new energy materials and lithium ion batteries, and discloses an all-solid-state battery using a high-stability sulfide solid electrolyte, the all-solid-state battery comprises a positive electrode layer, a negative electrode layer and a solid electrolyte layer located between the positive electrode layer and the negative electrode layer, the solid electrolyte layer comprises high-performance sulfide solid electrolyte powder, the powder is prepared from lithium sulfide, phosphorus pentasulfide, germanium disulfide and lithium chloride according to a specific molar ratio, and a slow cooling state crystal structure is formed by matching heat treatment in a specific temperature zone with a slow cooling process. The positive electrode layer comprises a layered nickel cobalt lithium manganate material of which the surface is coated with an amorphous lithium niobate layer, and the coating layer is formed through pure oxygen calcination. Through the synergistic effect of element doping and slow cooling processes, the ionic conductivity and water-resistant stability of the electrolyte are improved; meanwhile, a space charge layer effect and an interface side reaction are inhibited by utilizing a positive electrode interface coating technology, the interface impedance of the battery is reduced, and excellent electrochemical performance and long cycle life of the all-solid-state battery are realized.

The application discloses a kind of composite lithium metal negative electrode material and preparation method thereof, it is related to electrochemical energy storage technical field, the method comprises: the three-dimensional porous carbon framework of pore size 50 to 500 nanometers is constructed, and 2 to 10 nanometer nitrogen-doped carbon layer is coated on its inner wall;Metal lithium is fused with lithium nitride to form lithium-rich melt;Capillary force is used to make molten lithium infiltrate into framework channel, in-situ generation and C-Li-N gradient interface phase;Lithium directional solidification is realized by programmed temperature cooling;Surface deposition 50 to 150 nanometer amorphous aluminum oxide passivation layer;Again, the final material is obtained by aging treatment.The application realizes lithium uniform loading, interface high ionic conductivity, structural integrity and high safety by the above technical scheme, significantly inhibits lithium dendrite growth, improves cycle stability and energy density consistency.

This invention relates to the field of composite material preparation technology, and more particularly to a novel diamond-copper composite process. This process involves vitrifying the surface of diamond micropowder to form a uniform and dense phosphate glass film on its surface. A porous preform is then prepared and subjected to low-temperature pressure-assisted consolidation at 700–850℃ and 30–50MPa under vacuum or an inert atmosphere. This causes the solid copper to undergo plastic rheological filling of the pores. Simultaneously, the phosphate glass undergoes an in-situ interfacial reaction with diamond and copper, forming a continuous gradient interfacial bond from diamond, phosphorus carbon oxides, copper phosphorus compounds to the copper matrix. Finally, the mixture is cooled in a furnace to obtain a dense diamond-copper composite material. Compared to traditional metal plating processes, this invention significantly reduces production costs, lowers energy consumption, and enhances interfacial bonding. It is easily scalable for industrial production and is suitable for fields such as electronic packaging, aerospace, and precision instruments where high thermal conductivity, electrical conductivity, and mechanical properties of materials are required.

The invention discloses a packaging structure, a forming method thereof and electronic equipment, the top of a first element and the top of a second element in the packaging structure are different in height, but the thicknesses of plastic packaging layers located above the first element and the second element are the same, so that the thicknesses of the plastic packaging layers on the elements with different heights are uniform, and the packaging structure is not prone to deformation in the cooling stage after curing. In the packaging structure, the plastic packaging layer on each element generates basically consistent volume shrinkage, so that the shrinkage stress at each part in the packaging structure is easily distributed uniformly, and the condition that the shrinkage stress is concentrated at the junction of different elements due to different thicknesses of the plastic packaging layers above the elements with different top heights is avoided. Therefore, the packaging structure provided by the embodiment of the invention can reduce the risk of element microcracks or connection damage caused by internal shrinkage stress, and can effectively improve the stability and reliability of the packaging structure, thereby improving the yield.

The invention belongs to the technical field of gel materials, and mainly provides rapid-reinforcing early-strength repairing type mortar and a preparation method thereof.The preparation method comprises the following steps that metering and even mixing are conducted, specifically, rapid-hardening sulphoaluminate cement, Portland cement and fly ash are weighed and evenly premixed, and a gelling component A is obtained; weighing steel slag and quartz sand, and uniformly mixing to obtain an aggregate component B; weighing a water reducing agent, an early strength agent, a retarder and half of the total weight of water, and uniformly mixing to obtain an admixture component C; stirring: adding the aggregate component B and water accounting for 1 / 4 of the total weight, rapidly mixing and stirring, adding the gelling component A, continuously stirring, adding the additive component C and water accounting for 1 / 4 of the total weight, and continuously stirring, so as to prepare the rapidly-reinforced early-strength repair mortar. And molding and curing. The uniformity is improved through grouping premixing, the interface bonding performance is improved through staged stirring, the defects of insufficient early strength caused by uneven components, poor interface, slow hydration and the like in traditional preparation are overcome, and the early strength advantage is fully exerted.

The utility model relates to the field of aluminum electrolysis, in particular to a scratching cutter for machining a cathode carbon block for aluminum electrolysis, which comprises an installation cutter plate, a plurality of welding bosses which are transversely arranged at intervals are arranged on the front end face of the installation cutter plate, a cutting edge portion is arranged on the top face of each welding boss, and the front end of each cutting edge portion is in a tip shape. The cutting edge part comprises a polycrystalline diamond layer, the polycrystalline diamond layer is compounded on a hard alloy substrate, and the hard alloy substrate is connected to the top surface of the welding boss through a welding layer. According to the utility model, the machining yield of the cathode carbon block can be effectively improved, and the occurrence of edge breakage and microcracks is reduced; and meanwhile, the cutter is high in hardness, not prone to abrasion, high in machining stability and long in service life.

The application discloses a kind of nano graphene lubricating oil and preparation method thereof, it is related to lubricating oil technical field.The application first with modified zirconium-titanium composite particles as catalyst to catalytically synthesize base oil, improve heat resistance effect;Then under the assistance of microwave, graphene is stripped to improve the dispersibility of graphene in lubricating oil, simultaneously with the surface of modified zirconium-titanium particles form hydrogen bond network, reduce fatigue wear, prolong service life, on this basis, particle and graphene produce electrochemistry deposition in the process of friction, reach the effect of self-repairing.Modified zirconium-titanium composite particles are first by precursor sol injection pre-cooled liquid nitrogen copper mould, quick freezing, vacuum sublimation drying removes ice crystal, forms snowflake-like hierarchical porous structure, improves lubricating effect;Then low-temperature annealing, form Zr-O-Ti mixed oxide framework, effectively inhibit pore collapse, prolong service life;Again through surface hydroxyl and capillary action, adsorb ionic liquid to form coating, enhance lubricating effect.

The application discloses a polymer-based anti-cracking concrete and a preparation method thereof, and relates to the technical field of concrete. In the preparation of the polymer-based anti-cracking concrete, a chain extender is prepared by the reaction of caffeic acid and glycidyl methacrylate; polyurethane is prepared by the reaction of isophorone diisocyanate with polyethylene glycol and the chain extender in sequence, and then the polyurethane is reacted with mercaptopropyl trimethoxysilane to obtain modified polyurethane; pre-modified nanocellulose is prepared by the reaction of carboxylated nanocellulose and 4-amino-2,2,6,6-tetramethylpiperidine, and then the pre-modified nanocellulose is reacted with isocyanate propyl triethoxysilane to obtain modified nanocellulose; fine aggregate, coarse aggregate, cement, fly ash, modified polyurethane, modified nanocellulose, water, water reducing agent and defoaming agent are uniformly mixed, poured into a mold, vibrated, placed, demolded, maintained and cured to obtain the polymer-based anti-cracking concrete. The polymer-based anti-cracking concrete prepared by the application has good anti-cracking and anti-aging performances.

The application relates to a silver-coated copper particle, a preparation method thereof and application of the silver-coated copper particle in sintering paste, and belongs to the field of sintering materials. The application solves the problem of high sintering temperature of high-temperature solder in the prior art. The silver-coated copper particle is prepared by a multi-step chemical synthesis method, that is, silver-coated copper particle suspension is prepared first, and then a silver complex solution, a second chelating agent solution and a complexing agent solution are used to realize gradient structure evolution of the silver layer from compact to porous by controlling the release and reduction rate difference of silver ions, the surface of the silver-coated copper particle has a multi-stage pore structure, the contact resistance between particles can be effectively reduced, the sintering starting temperature can be effectively reduced, the poor oxidation performance of copper particles is solved, the silver consumption is reduced, the manufacturing cost is reduced, the ion migration path length and the electromigration life are increased, the silver-coated copper particle prepared by the application greatly meets the requirements of the electronic packaging field for new welding materials, and has remarkable social and economic benefits.

This invention discloses an eco-friendly concrete cementitious material and eco-friendly concrete, belonging to the field of building materials technology. This invention provides an eco-friendly concrete cementitious material that significantly improves the mechanical properties of eco-friendly concrete through the scientific compounding and synergistic effect of its components. Sulfoaluminate cement, as the main cementitious material, provides early strength and micro-expansion characteristics, effectively compensating for shrinkage. Mineral powder and silica fume, as active mineral admixtures, not only exert a micro-aggregate filling effect, densifying the microstructure of the hardened body, but also consume Ca(OH)2 in the system through a secondary hydration reaction, initially reducing the risk of efflorescence. Gypsum not only regulates the setting time but also promotes the formation of ettringite, improving the strength of the concrete matrix. By adding modified mesoporous silica, the alkali-sealing performance and mechanical properties of eco-friendly concrete can be significantly improved.