883results about How to "Reduce internal stress" patented technology

The invention relates to the technical field of epoxy resin composite materials, in particular to an epoxy resin-based composite material and a preparation method thereof. The epoxy resin-based composite material comprises modified carbon fibers and an epoxy resin base material impregnated on a modified carbon fiber matrix, and the epoxy resin base material comprises the following raw materials in parts by weight: 80-100 parts of epoxy resin, 4-18 parts of a toughening elastomer, 24-45 parts of a curing agent and 1-3 parts of an accelerant. The carbon fibers are subjected to surface grafting hyperbranched molecular modification, so that the interface action between the modified carbon fibers and an epoxy resin matrix can be remarkably enhanced, and meanwhile, the high strength and high temperature-resistant stability of the carbon fibers are utilized, so that the epoxy resin-based composite material has good toughening, reinforcing and temperature resistance improving effects.

The invention relates to the field of glass product processing, in particular to an automatic feeding and discharging device and process for a glass product press. The technical problem is that heat on the upper surface of a glass product is rapidly taken away by high-speed airflow, and the heat at the bottom of the glass product changes slowly, so that the glass product is easier to crack. Comprising a base, a first supporting column is fixedly connected to the base, the device further comprises a downward pressing mechanism and a clamping mechanism, the downward pressing mechanism is installed on the top of the first supporting column, the clamping mechanism is installed on the outer wall of the first supporting column, and a buffering mechanism is installed on the clamping mechanism. Cold air is driven by the first air blower and the second air blower to enter the first heat exchange channel and the second heat exchange channel respectively, the temperature of the glass product is reduced through heat exchange to shape the glass product, the top and the bottom of the glass product are simultaneously cooled, and the internal stress of the glass product is reduced. And fragmentation caused by overlarge internal stress during cooling and shaping of the glass product is prevented.

The invention belongs to the technical field of protective coatings, and provides a polysilazane composite coating as well as a preparation method and application thereof. According to the polysilazane composite coating disclosed by the invention, the elastic polymer is used as a toughening agent, so that the toughening effect on polysilazane can be achieved, and the problem of high brittleness of polysilazane is solved; and by using the flexibilizer, the internal stress of the polysilazane composite coating formed by the polysilazane composite coating can be reduced, and the cracking of the polysilazane composite coating is avoided, so that the polysilazane composite coating can be thickly coated. Alcohol substances and / or ester substances are used as the lubricant, so that the lubricity and wear resistance of the polysilazane composite coating formed by the polysilazane composite coating can be improved. And by using the two-dimensional composite material, the wear resistance and corrosion resistance of the polysilazane composite coating formed by the polysilazane composite coating can be obviously improved, and meanwhile, the polysilazane composite coating can be endowed with a lubricating function.

The invention provides a processing method of an ultrathin plano-convex lens, which comprises the following steps: fixing a blank on a parallel disc, and carrying out rough grinding processing on a first surface to obtain a first rough grinding blank; the first rough grinding blank is polished, and a first rough grinding and polishing blank is obtained; the first surface of the first rough grinding and polishing blank is fixed to a parallel disc, and rough grinding machining is conducted on the second surface of the first rough grinding and polishing blank to obtain a second rough grinding blank; the second rough grinding blank is polished, and a second rough grinding and polishing blank is obtained; the second surface of the second rough grinding and polishing blank is fixed to an optical cement disc, and finish machining is conducted on the first surface of the second rough grinding and polishing blank to obtain a first finish machining lens; the first surface of the first finish machining lens is fixed to an optical cement disc through a base plate, finish machining is carried out on the overall appearance of the first finish machining lens to form a spherical surface, and the plano-convex lens is obtained. The problem that an existing ultra-thin plano-convex lens part is thin in size and prone to deformation, and consequently products do not reach the standard is solved.

The invention relates to the technical field of concrete preparation, in particular to moisturizing anti-cracking high-ductility concrete and a preparation method thereof. The moisturizing anti-cracking high-ductility concrete is prepared from the following components: 350 to 450 parts of ordinary Portland cement, 200 to 300 parts of fly ash, 30 to 50 parts of silica fume, 250 to 350 parts of quartz sand, 0.5 to 1 part of a water reducing agent, 10 to 20 parts of an expanding agent, 0.1 to 0.3 part of a retarder, 0.5 to 1 part of a thixotropic lubricant, 0.2 to 0.7 part of a modified nano material, 0.7 to 3 parts of a modified composite curing agent, 5 to 10 parts of an anti-cracking agent, 5 to 12 parts of polymer fiber and 180 to 220 parts of water. The high-moisture-retention high-water-retention concrete has the characteristics of high moisture retention and high water retention, is beneficial to maintaining the internal humidity balance, reducing cracks generated by drying shrinkage, improving the durability of the concrete, and remarkably reducing the cracking risk of the concrete in the hardening process, so that the concrete structure is more complete, the safety of the structure is improved, and the service life of the structure is prolonged.

The invention relates to the technical field of stainless steel bar heat treatment, in particular to an efficient and energy-saving stainless steel bar heat treatment device, and effectively solves the problems that rapid heat treatment cannot be performed on a single bar, and the bar is inconvenient to clamp and position. Comprising a heating bin, a solid solution heating assembly is arranged in the heating bin, through holes are formed in the left side and the right side of a heat insulation plate respectively, the left end of the heating bin is fixedly connected with the heat insulation plate, the left side of the heat insulation plate is slidably connected with multiple positioning rods evenly distributed in the circumferential direction of the through holes, and rotating balls are hinged to one ends of the positioning rods; by arranging the heating bin and the solid solution heating assembly, the stainless steel bar entering the heating bin can be subjected to solid solution heating, the internal stress of the stainless steel bar is reduced, and secondary drawing is facilitated; the positioning rod, the rotating ball, the clamping assembly, the support, the conveying roller, the moving assembly and the driving assembly are arranged, the clamping assembly can be used for driving the positioning rod to be close to or away from the center of the through hole, and then a bar is clamped while center positioning is conducted.

The invention provides forming equipment of a photovoltaic support plate, the middle part of the photovoltaic support plate comprises a middle support structure, and the two sides of the photovoltaic support plate comprise a first side support structure and a second side support structure; the forming equipment comprises a rack and a forming assembly. The middle part of the forming assembly is used for forming a middle supporting structure, the right side of the forming assembly is used for forming a first side supporting structure, and the left side of the forming assembly is used for forming a second side supporting structure; the right side of the forming assembly is sequentially divided into a first right forming area, a second right forming area, a third right forming area and a fourth right forming area in the conveying direction. By applying the technical scheme, the forming equipment which can form a more complex and stable side support structure can be provided.

The invention belongs to the technical field of cables, and particularly relates to a high-voltage cable for a new energy vehicle, which comprises a conductor and an insulating layer, the insulating layer material is prepared from the following raw materials in parts by mass: 40 to 50 parts of polyethylene, 5 to 10 parts of beta-caryophyllene-maleic anhydride-polyethylene copolymer, 10 to 15 parts of ethylene-octene copolymer, 1 to 4 parts of composite cross-linking agent, 2 to 3 parts of cellulose nanofiber, 1 to 2 parts of kaurene, 5 to 10 parts of flame retardant, 0.5 to 1 part of flexibilizer and 0.5 to 1 part of lubricant. The prepared cable has excellent thermal stability, mechanical strength and insulating property, the service life of the cable is effectively prolonged, and the use stability of the cable is effectively improved.

The invention relates to the technical field of piezoelectric materials, in particular to a lead zirconate titanate film and a low-temperature preparation method and application thereof.The preparation method comprises the steps that Ti metal serves as a radio frequency target material and is subjected to first sputtering deposition treatment on a substrate, and a Ti adhesion layer is formed; forming a bottom electrode on the Ti adhesion layer; taking PbxZr0. 52Ti0. 48O3 ceramic as a radio frequency target material, carrying out second sputtering deposition treatment on the bottom electrode, and carrying out rapid heat treatment to form a PZT seed layer; and carrying out third sputtering deposition treatment on the PZT seed layer by taking PbxZr0. 52Ti0. 48O3 ceramic as a radio frequency target material, carrying out rapid heat treatment, and repeating the step to form the lead zirconate titanate film. According to the method, the substrate tray is not additionally heated in the process of sputtering and depositing the PZT thin film material, so that the loss and volatilization of PbO are reduced, and the stability of thin film components can be effectively maintained; the PZT seed layer is utilized to provide more crystal nucleuses, so that the uniform crystallization of the PZT film is promoted, the crystallization quality and the electrical property of the PZT film are improved, the grain boundary defect is reduced, and the adhesive force and the stability of the film and the substrate are enhanced.

The invention provides integrated circuit production and processing equipment, and relates to the technical field of integrated circuit processing, the integrated circuit production and processing equipment comprises a base, the base is provided with a positioning mechanism convenient for fixing an integrated circuit board, the base is provided with a gluing mechanism convenient for gluing and packaging, and the base is provided with a collecting mechanism convenient for recycling glue; the positioning mechanism comprises a vertical rod, the gluing mechanism comprises a support, a first T-shaped sliding block, a glue storage barrel and a valve plate, and the collecting mechanism comprises a constant temperature box, a collecting box, a second motor, an arc-shaped sliding rod and an arc-shaped scraping plate. According to the device, a gluing mode of erecting the integrated circuit board from top to bottom is set, glue naturally falls under the action of gravity, the glue amount can be more accurately controlled, the glue amount of each point is more uniform and consistent, and compared with a mode of plane gluing and waiting for natural leveling of the glue, the glue amount is more uniform and uniform by erecting the circuit board for gluing; the glue can quickly reach a designated position under the action of gravity and form a uniform glue layer, and extra leveling time is not needed.

The invention relates to a rock mass gas blasting method based on stress wave guidance. The method is suitable for the technical field of geotechnical engineering and mining. The technical problem to be solved by the invention is to provide the rock mass gas blasting method based on stress wave guidance. According to the technical scheme, the method comprises the steps that stress wave simulation is conducted on the basis of geological conditions of a target rock mass, and a stress wave simulation result of the rock mass is obtained; determining an arrangement mode and an excitation working mode of an ultrasonic excitation source and a low-frequency excitation source based on the type of the rock mass, the crack propagation target depth and the stress wave simulation result of the rock mass; wherein the low-frequency excitation source is used for reducing the rigidity of the surface of a rock mass through low-frequency excitation, increasing micro-deformation and initial micro-cracks of the rock mass, creating conditions for propagation of ultrasonic waves and locally guiding the formation position of the cracks; the ultrasonic excitation source is used for enabling ultrasonic waves to effectively reach the deep layer of the rock mass by utilizing the high penetrability of the ultrasonic waves to excite the expansion of microcracks.

The invention provides a silicon-based negative pole piece and a lithium ion battery comprising the same, and relates to the technical field of lithium ion batteries. Comprising a negative electrode current collector, a second active material layer arranged on at least one surface of the negative electrode current collector, and a first active material layer arranged on the surface of the second active material layer. The design of the two active material layers ensures high energy density, and meanwhile, the formula design is optimized by combining the bonding characteristic of the interface layer, so that large internal stress is prevented from being generated in the charging and discharging process; the organic porous cross-linked polymer is applied to the negative pole piece, and the polymer is loose and porous and can be subjected to cross-linked polymerization in a high-temperature process, so that negative pole particles are tighter, expansion of a silicon negative pole in a charging and discharging process can be buffered, and stripping and cracking of the pole piece are prevented.

The invention provides a preparation method of a micro TiAl alloy wire, and relates to the technical field of TiAl alloy preparation. The preparation method comprises the steps of raw material selection and treatment of a wire material, raw material twisting of the wire material, continuous warm drawing of a primary TiAl composite stranded wire, twisting of the primary TiAl composite wire, continuous warm drawing of a secondary TiAl composite stranded wire, repeated warm drawing of the TiAl composite wire, continuous extrusion of the TiAl wire and diffusion homogenization of the TiAl alloy wire which are sequentially carried out. According to the preparation method, the TiAl alloy wire with uniformly distributed components can be directly prepared at a lower temperature by combining multiple wire twisting, multiple continuous hot drawing and final diffusion homogenization annealing, the high-temperature melting process is effectively avoided, the components and the diameter of the TiAl alloy wire can be designed according to the requirements of the target TiAl alloy wire for the passes in the preparation and extrusion process of the TiAl composite wire, and the preparation process of the TiAl alloy wire is simplified. The method is high in flexibility, simple to operate, wide in application, low in cost and very suitable for large-scale industrial production.

The invention provides a positive electrode material as well as a preparation method and application thereof, and relates to the technical field of lithium ion batteries. The particle size distribution curve of the positive electrode material is bimodal distribution, the positive electrode material is composed of large-particle-size secondary spherical particles and small-particle-size secondary spherical particles, the large-particle-size secondary spherical particles are composed of small-particle-size primary spherical particles, the small-particle-size secondary spherical particles are composed of large-particle-size primary spherical particles, and the large-particle-size primary spherical particles are composed of small-particle-size primary spherical particles. The D50 of the large-particle-size secondary sphere particles is 8.0-12.0 [mu] m, the D50 of the small-particle-size secondary sphere particles is 2.0-4.0 [mu] m, the maximum diameter of the small-particle-size secondary sphere particles is not more than 5 [mu] m, and the minimum diameter of the large-particle-size secondary sphere particles is not less than 5 [mu] m. Compared with the prior art, the invention provides the positive electrode material matched with two secondary spherical particles with different primary spherical particle sizes, so that the compaction density and the cycling stability of the positive electrode material are improved.

The invention relates to the technical field of electronic ceramic materials, and particularly discloses a microwave dielectric ceramic material and a preparation method thereof.The microwave dielectric ceramic material is prepared from, by mass, 75-95 parts of a first main material, 0-18.4 parts of a second main material, 0.03-3.9 parts of B2O3 and 0-13.5 parts of other components, and the first main material is SiO2. When the mass ratio of the B2O3 to the SiO2 is within a specific range, the crystal phase of the SiO2 can be stably converted into a quartz crystal phase, so that the cracking possibility of the microwave dielectric ceramic material is effectively reduced.

The invention relates to the technical field of circuit board manufacturing, and provides a circuit board manufacturing method and a circuit board, and the method comprises the steps: electroplating a golden finger on a production board through an electroplating lead; covering selective printing ink on the part of the electroplated lead and the golden finger; forming at least one finished board on the production board along the routing forming line; carrying out bevel edge processing on the finished board; covering an OSP film on the finished board; and removing the selective ink. According to the circuit board manufacturing method, after the golden finger is electroplated, the part of the electroplated lead and the golden finger are covered with the selective ink, and the selective ink is removed after the OSP process, so that the ratio of the area of the exposed gold layer to the area of the nickel layer and the copper layer at the bevel edge in the OSP process is small, that is, the galvanic effect is not obvious, and the nickel layer and the copper layer are slightly corroded; and the risk that the nickel-gold layer tilts and falls off is reduced, so that the risk of short circuit is reduced.

The invention discloses a method for improving the stability of an absolute pressure type pressure sensor and the absolute pressure type pressure sensor, and the method comprises the steps: placing an absolute pressure chip in a square groove of a sintering pedestal, and carrying out the positioning of the absolute pressure chip; dispensing glue on the periphery of the sintering base, and bonding the ceramic insulating cover in the inner cavity of the sintering base; a circuit on the absolute pressure chip is connected with a pin on the sintering base through a gold wire, and the pressing ring, the corrugated diaphragm and the sintering base are welded and fixed; a cavity between the corrugated diaphragm and the sintering base is filled with silicone oil, and the cavity is sealed through steel balls. According to the method, in the process of improving the stability of the absolute pressure type pressure sensor, the square groove is formed in the sintering base, and the absolute pressure chip is placed in the square groove of the sintering base, so that on one hand, the absolute pressure chip can be effectively positioned; the internal stress generated by thermal mismatch caused by material performance mismatch between the adhesive and the sintering base and between the adhesive and the chip is eliminated, and the stability of the absolute pressure chip sensor is improved.

The invention relates to a modified fly ash-based mining filling material and a preparation method thereof. The material comprises the following components: modified fly ash, lime, cement, gypsum, sodium sulfate, epoxy resin and the like. By using a composite modification system of the nitrogen-containing silane coupling agent, triethanolamine and organic acid, the dispersity of the fly ash is improved, and the fly ash is uniformly distributed in the slurry; lime, gypsum and sodium sulfate are used as excitants, so that the filling material keeps good strength and stability at high temperature, and the risk of structural damage caused by temperature rise is avoided; and meanwhile, the material cannot be excessively embrittled or the strength of the material is not reduced in a low-temperature environment. Besides, due to the excellent bonding performance of the added epoxy resin, the fly ash, the cement and other materials can be effectively glued into a filling body with certain strength and stability, the epoxy resin is also beneficial to reducing the internal stress and deformation of the cured materials, and the long-term stability of the filling body is ensured. The filling material disclosed by the invention is particularly suitable for mine filling and supporting operation, and can provide a reliable filling effect under an extreme temperature condition.

The invention relates to a modified epoxy resin adhesive and a preparation method thereof, and belongs to the technical field of high polymer materials. The modified epoxy resin adhesive comprises the following components in parts by weight: 90-120 parts of epoxy resin, 8-25 parts of a curing agent, 1-3 parts of a diluent, 0.5-5 parts of a curing accelerator, 4-18 parts of graphite, 1-4 parts of a modified flexibilizer and 10-30 parts of nano diamond / boron nitride (PDA), a polyurethane single soft and hard segment structure and a high-temperature-resistant oxazolidinone ring in the modified toughening agent cooperate with poly (p-phenylene ether sulfone) resin, so that the toughness is effectively enhanced, and crack propagation is inhibited; boron nitride is modified by nano-diamond, wear resistance is optimized, good electric insulativity and chemical corrosion resistance are given to a matrix, polydopamine can promote a compound to be evenly dispersed in the epoxy resin matrix, wear resistance and adhesive force are improved, and the prepared modified epoxy resin adhesive has good toughening and wear-resisting effects and also has the advantages of being good in toughness, good in toughness and good in wear resistance. And the cable also has excellent high temperature resistance, corrosion resistance and electric insulation effects.

The invention relates to the field of metal soft magnetic materials, in particular to a high-frequency high-permeability metal soft magnetic powder core and a preparation method thereof. The preparation method comprises the following steps: S1, screening magnetically soft alloy powder with a preset particle size; s2, preparing passivation powder; s3, preparing granulation powder; s4, a blank is prepared through compression molding; s5, the blank piece is subjected to curing treatment; and S6, the cured part is subjected to high-temperature heat treatment in vacuum, and the high-frequency and high-permeability metal soft magnetic powder core is obtained. The preparation method disclosed by the invention is simple, mild in reaction condition, low in cost and capable of realizing automatic large-scale production. The high-frequency and high-permeability metal soft magnetic powder core prepared by the invention has high frequency, high magnetic induction intensity and high unit power density, particularly, the internal stress of a metal soft magnetic material is released to the greatest extent by adopting high-temperature heat treatment, the coercive force is reduced, the density and the permeability are remarkably improved, and the high-frequency and high-permeability metal soft magnetic powder core is widely applied to DC-DC and power supply circuits with ultrahigh switching frequency and high magnetic conductivity. And a MHz-level power supply circuit.

The invention provides salt-spray-resistant steel, a preparation method and application of the salt-spray-resistant steel. The salt-spray-resistant steel sequentially comprises an alloy matrix, a permeable layer and an anti-corrosion coating from inside to outside. The alloy matrix comprises an Fe element; the permeable layer comprises Fe, N and O elements; the anticorrosive coating covers at least the surface of the permeable layer. The steel has the characteristics of high strength and salt spray resistance, the binding force of the coating and a matrix is good, the thickness of the anti-corrosion coating is greatly reduced under the condition that the anti-corrosion requirement of the CX grade is met, the machinable performance of a workpiece is effectively improved, and the adverse effects that the workpiece meshing force is poor, and the surface is not uniform due to the thick coating are avoided.

The utility model belongs to the technical field of batteries, and discloses a battery pole piece and a battery cell, the battery pole piece comprises a pole piece body, an embossed area is arranged on the pole piece body, the embossed area at least comprises two kinds of embossments with different depths along the direction from the winding starting point to the winding ending point of the pole piece body, the embossing depth close to the winding starting point is larger than the embossing depth away from the winding starting point. The battery pole piece can effectively reduce the lithium precipitation phenomenon of the battery, and is favorable for improving the capacity of the battery and prolonging the cycle life.

The invention relates to the technical field of polyurethane coatings, and discloses a preparation method of an antibacterial wear-resistant waterborne polyurethane coating, which comprises the following steps: taking concentrated hydrochloric acid, p-phenylenediamine, sodium nitrite, paraformaldehyde, amino-modified nano silicon dioxide and hexamethylene diisocyanate as raw materials; the preparation method comprises the following steps: taking 9, 10-dihydro-9-oxa-10-phosphaphenanthrene-10-oxide as a raw material, carrying out diazotization coupling reaction, substitution reaction, Mannich reaction and addition reaction to prepare modified polyisocyanate, then taking 9, 10-dihydro-9-oxa-10-phosphaphenanthrene-10-oxide and ((2-aminoethyl) azadiyl) dimethanol as raw materials, carrying out substitution reaction to prepare DOPO-based dihydric alcohol, and carrying out reaction to prepare the DOPO-based dihydric alcohol. Finally, the modified polyisocyanate, DOPO-based dihydric alcohol and polyethylene glycol 400 are used as raw materials, an antibacterial wear-resistant polyurethane emulsion is prepared through a prepolymerization reaction and a chain extension reaction, and the prepared polyurethane coating has good antibacterial, anti-ultraviolet, flame-retardant and wear-resistant properties.

The invention relates to an LNG ship liquid cargo containment system corrugated unit and a corrugated plate, the LNG ship liquid cargo containment system corrugated unit comprises a bottom plane part and a corrugated protruding part which are arranged in a stacked mode, the corrugated protruding part has a certain height relative to the bottom plane part, and the height is smaller than the length of the bottom plane part; the projection of the corrugated protruding part on the bottom plane part coincides with the bottom plane part. The bottom plane part is provided with a plurality of edges, and the edges of the bottom plane part are connected with the corrugated protruding parts respectively. According to the corrugated plate, transverse and vertical low-temperature contraction deformation is absorbed at the same time through the corrugated convex structures, and internal stress generated by low-temperature contraction of the corrugated plate in a large-temperature-difference-change working scene can be reduced. The corrugated unit form is simple in structure and easy to machine, forming is easy to control in the machining and stamping process, the thinning rate is uniform and dispersed, and the yield is high.

The invention discloses a casting cylinder body preparation method. The casting cylinder body preparation method comprises the following steps that 1, the bottom of a plunger hole in a cylinder body is sealed; 2, the copper alloy and the casting cylinder body are sintered; step 3, cooling the cast cylinder body; according to the method, through a segmented cooling mode, casting defects such as shrinkage porosity and shrinkage cavities are avoided, copper-steel bimetal metallurgy diffusion bonding is achieved, it is guaranteed that a copper alloy layer has good mechanical and tribological properties, and therefore the service life of the copper-steel bimetal cylinder body is prolonged.

The invention discloses a transverse connecting device of a steel structure stand column, comprising: a stand column, the outer surface of which is provided with a mounting surface; the cross beam comprises a main body section and a butt joint section; one end, far away from the main body section, of the butt joint section is provided with a butt joint surface, and the butt joint surface is used for being in butt joint with the mounting surface and fixed through a bolt; a first butt joint disc is arranged at the end, opposite to the butt joint section, of the main body section, and a second butt joint disc is arranged at the end, opposite to the main body section, of the butt joint section. A connecting disc is arranged between the first butt joint disc and the second butt joint disc; the connecting disc is provided with a plurality of first connecting areas connected with the first butt joint disc, and the first connecting areas are arranged at intervals in the circumferential direction; the connecting disc is provided with a plurality of second connecting areas connected with the second butt joint disc, and the second connecting areas are arranged at intervals in the circumferential direction; and the second connecting areas and the first connecting areas are alternately arranged.

The invention relates to the field of carbon-ceramic composite materials, in particular to a chopped carbon fiber reinforced carbon-ceramic composite material and a preparation method thereof.The chopped carbon fiber reinforced carbon-ceramic composite material is prepared from, by weight, 10-60 parts of chopped carbon fibers, 10-60 parts of silicon carbide powder, 10-60 parts of carbon powder, 10-60 parts of phenolic resin and 0.1-10 parts of graphene; the prepared carbon-ceramic composite material has good mechanical properties and excellent wear resistance, the densification process of the material is rapid and does not need to be repeatedly carried out, the time is saved, and the production efficiency is improved.

The invention provides a silicon-based negative electrode material, a preparation method of the silicon-based negative electrode material, a dry-method electrode, a battery and electric equipment, and belongs to the technical field of battery manufacturing. The silicon-based negative electrode material is of a core-shell structure, an inner core is a silicon-based material, a shell is a cross-linked polymer layer, the cross-linked polymer layer can conduct ions but cannot conduct electrons, the silicon-based negative electrode material can effectively inhibit PTFE from generating side reaction with lithium ions on the surface of a negative electrode, and meanwhile, the service life of the silicon-based negative electrode material is prolonged. And the problems of electrode pulverization, falling and the like caused by volume expansion of the silicon-based material in the charge-discharge process can be effectively solved, so that the corresponding battery has relatively excellent first discharge gram capacity, first efficiency and cycle performance.

The invention relates to the technical field of epoxy resin, in particular to an epoxy resin composition for high-strength carbon fiber winding and a preparation method thereof.The preparation method of the epoxy resin composition comprises the steps that S1, modified epoxy resin, a compatilizer, a retarder, a defoaming agent and nano filler are added into a reaction kettle and mixed and stirred, and a mixture A is obtained; s2, a composite curing agent is added into the mixture A, stirring and mixing are conducted, and the epoxy resin composition is obtained and has the advantages of being appropriate in viscosity, good in heat resistance, excellent in impact resistance, large in bending strength, small in volume shrinkage rate in the curing process, moderate in gelation time and capable of being wound with carbon fibers conveniently to prepare the composite material.

The invention relates to butterfly plate processing, and discloses a heat treatment device and a heat treatment process for preventing deformation of a large butterfly plate, the heat treatment device comprises a bottom plate, the top of the bottom plate is fixedly connected with a stand column, the top of the stand column is provided with a rotating column, the top of the rotating column is fixedly connected with a top plate, and the top plate is provided with a hoisting mechanism. An electric push rod, an upper baffle and a lower baffle are arranged to drive a clamping block to move up and down, so that a connecting rope can be straightened conveniently, a butterfly plate is more stable during hoisting, the connecting rope can be clamped through an inserting groove, an L-shaped rod, a spring and a hemisphere, the hoisting stability of the butterfly plate is further improved, and the hoisting efficiency of the butterfly plate is improved. And shaking of the butterfly plate in the quenching process is reduced, so that the butterfly plate is quenched more uniformly, the probability of deformation of the butterfly plate in the quenching process is reduced, and the butterfly plate is quenched more stably.