147results about How to "Guaranteed bonding strength" patented technology

The invention provides a method for aligning a bonding body wafer on a non-infrared exposure machine, which comprises the following steps of: providing the bonding body wafer which comprises a plurality of wafers in bonding connection, and forming alignment marks on the bonding surfaces of the wafers which are mutually bonded; manufacturing an alignment photomask, wherein the alignment photomask is provided with an alignment mark window pattern; forming an alignment mark window on the surface of the bonding body wafer by utilizing photoetching and etching processes through an alignment photomask, and exposing the alignment mark on the bonding surface through the alignment mark window; and carrying out photoetching alignment through the exposed alignment mark. According to the method, the alignment problem when the alignment mark on the non-infrared exposure machine is positioned in the bonding body wafer is solved. The invention further provides a preparation method of the semiconductor device, the alignment method is adopted for alignment after the front face and the back face of a bonding body wafer are thinned, then the pattern face of the device is processed, and possible pollution to the bonding face and possible damage to the pattern face are avoided.

The invention discloses a wind power blade structure with a segmented tail edge and a method, solves the problem that in the prior art, the width of a wind power blade cannot be increased due to transportation limitation, and has the beneficial effect that on the premise that the strength is guaranteed, segmented transportation can be achieved so that the width of the blade can be increased. Comprising a blade body and a blade trailing edge which are arranged in the chord direction of the blade, the blade body is provided with a first notch, the blade body is provided with a first trailing edge beam in the length direction of the blade body, the first trailing edge beam passes through the first notch, and a first web is arranged at the first notch of the blade body in the thickness direction of the blade body and supports the first trailing edge beam; a second notch is formed in one side of the blade rear edge, the shape of the second notch is matched with that of the first notch, a second rear edge beam is arranged in the length direction of the blade rear edge and passes through the second notch, and the first rear edge beam and the second rear edge beam can be bonded into a whole.

The invention relates to the technical field of metal surface treatment, in particular to a method for achieving titanium metal surface rapid boronizing through electric field induction nanometer assembly in molten salt, titanium dioxide powder, boron powder, inorganic salt and a nanometer particle wrapping agent are evenly mixed, and the molten salt containing nanometer TiB2 is obtained after heating reaction. Graphite and a titanium metal part are put into molten salt containing nano TiB2, the graphite serves as a positive electrode, the titanium metal part serves as a negative electrode, the surface area ratio of the positive electrode to the negative electrode is (3-10): 1, the nano TiB2 in the molten salt is assembled on the surface of the titanium metal part under the action of an electric field to form a boronizing layer, and the boronizing speed is 60-500 microns / h. Compared with an existing high-temperature boronizing technology with active boron atoms as a constituent unit, the high-temperature boronizing technology has the advantages that the boronizing speed can be remarkably increased, the high-temperature boronizing treatment time of titanium metal is shortened, energy is saved, cost is reduced, and meanwhile the negative influence of the high-temperature environment on the organization structure and the mechanical property of a titanium metal part is eliminated.

The invention relates to the technical field of secondary ion batteries, in particular to a dry binder and a preparation method thereof as well as an electrode plate and a preparation method thereof. The preparation method of the dry binder comprises the following steps: mixing and granulating a graft polymer and a metal salt to obtain the dry binder, the graft polymer comprises maleic anhydride grafted polypropylene. Maleic anhydride grafted polypropylene is used as a polymer matrix and is blended with the metal salt to prepare the solvent-free dry-method binder through a mixing process, and the solvent-free dry-method binder has excellent binding strength and lithium ion conductivity, and is high in use safety and low in raw material cost.

The high-strength composite corrugated board is characterized by comprising an inner paper layer, a flexible composite layer, an adhesive paper layer, a paper core, a buffer foam board, a reinforced composite layer and a surface paper layer which are sequentially arranged from top to bottom, the upward waveform of the paper core is of a parabola-shaped top structure, and the downward waveform of the paper core is of a triangular vertex angle structure. The corrugated board has the beneficial effects that the compression resistance and the strength of the outer side and the stress buffering performance of the inner side are guaranteed, the overall strength and the bending resistance of the corrugated board are enhanced, the bonding strength is guaranteed by providing a new formula of the flame-retardant polyurethane foam and the waterproof polyurethane adhesive and a combined use method, and the service life of the corrugated board is prolonged. The toughness and the buffering effect are enhanced, the toughness and the pressure bearing capacity of the paperboard are enhanced, and meanwhile the excellent waterproof and flame-retardant effects are guaranteed.

The invention provides a pole piece, a roll core and a battery, relates to the technical field of batteries, and is used for solving the technical problem that an active material layer at a knurling bulge is separated from a current collector due to the fact that the knurling bulge is arranged on the pole piece in the prior art. The pole piece comprises the current collector, a first active material layer and a second active material layer; the current collector has a first surface and a second surface opposite to each other, the first active material layer is arranged on the first surface, and the second active material layer is arranged on the second surface; a plurality of first convex parts are arranged on the first active material layer, and a plurality of concave parts corresponding to the first convex parts are arranged on the second active material layer; the current collector is provided with a bent part and a flat part, the bent part is located between the first protruding part and the concave part, the bent part is provided with a plurality of second protruding parts, and the second protruding parts are arranged on the first surface or the second surface in a protruding mode. The second protruding parts can increase the contact area between the active material layer and the current collector, improve the bonding strength between the active material layer and the current collector, and prevent the active material layer from falling off.

The invention relates to the technical field of tool cladding, in particular to a high-speed multi-laser-head synchronous cladding device for tool machining. Comprising a chassis; the controller is mounted at the top of the chassis; the mounting column is connected to the middle of the top of the chassis; the first electric push rod is mounted in the mounting column; the lifting plate is connected to a telescopic rod of the first electric push rod; the first mounting frame is connected to the side surface of the lifting plate; the telescopic storage frame is mounted at the lower part of the first mounting frame; and the second electric push rods are symmetrically mounted at the upper part of the first mounting frame. Through cooperation of the telescopic storage frame, the flow dividing pipe and the fixing pipe, a proper amount of soldering paste can be smeared to the cutting edge of the tool, then a metal powder material is sprayed to the cutting edge of the tool through the metal powder spraying gun, and the metal powder material can be fixed to the cutting edge of the tool under the action of the soldering paste; and then the cutting edge of the cutter is subjected to laser cladding, so that the phenomenon that the metal powder material splashes can be prevented.

The invention discloses a physical non-stick structure, a cooking utensil and a processing method, the physical non-stick structure is applied to the surface of a metal base material, and the physical non-stick structure comprises a shot blasting layer arranged on the surface of the metal base material and a physical vapor deposition layer arranged on the surface of the shot blasting layer. And the morphology of the surface of the physical vapor deposition layer is similar to that of the surface of the shot blasting layer covered by the physical vapor deposition layer. The physical non-stick structure and the cooking utensil have the physical non-stick performance, and compared with a traditional method, the process is simple, and the cost is low.

The invention belongs to the technical field of refractory materials, and particularly relates to a magnesium-manganese-aluminum composite spinel brick and a preparation method thereof. The preparation method comprises the following steps: by taking 4-ethoxy-3-methylphenylboronic acid as a modifier, introducing boric acid ester groups on the surfaces of phenolic resin hollow microspheres to prepare boric acid ester modified phenolic resin hollow microspheres; the preparation method comprises the following steps: modifying alkaline silica sol by using epoxy organic silicon resin, introducing an organic polymer to the particle surface of the alkaline silica sol to prepare modified silica sol, and mixing the modified silica sol with sodium hexametaphosphate to prepare the composite binder. According to the invention, high-purity magnesia, fused magnesia, fused hercynite, alpha-Al2O3 micro powder, manganese dioxide powder, metal manganese powder, a composite binder and boric acid ester modified phenolic resin hollow microspheres are compounded; the prepared magnesium-manganese-aluminum composite spinel brick has excellent mechanical properties, high temperature resistance, corrosion resistance and kiln coating hanging performance while keeping low heat conductivity.

The invention belongs to the field of high-molecular compounds, and provides polyester polyol for an adhesive as well as a preparation method and application of the polyester polyol. According to the preparation method, firstly, aliphatic dibasic acid is chemically modified through maleic anhydride, ester bonds with high polarity are generated, more reaction sites are introduced into the structure, and the crosslinking density is improved, so that stable cohesiveness can be kept in a high-temperature environment. The citric acid and the epoxidized soybean oil are added in the formula, and the citric acid is introduced as polybasic acid, so that the cross-linking reaction capacity of the material is enhanced, a more compact polymer network is formed, and the heat resistance and chemical stability of the adhesive are improved; by adding epoxidized soybean oil, the material is endowed with better flexibility, and meanwhile, epoxy groups can react with other components to form additional chemical crosslinking, so that the strength and durability of the material are further enhanced, and a synergistic effect is formed between the epoxy groups and maleic anhydride modified aliphatic dibasic acid; the excellent performance of the material can still be kept in a high-temperature environment.

The invention discloses electric equipment, which comprises an electric main body, a cover body and a secondary battery, the power utilization main body is provided with a battery compartment. The cover body is detachably arranged on the power utilization main body and covers the battery compartment. And the secondary battery is arranged in the battery compartment and is electrically connected with the power utilization main body. The secondary battery comprises a shell, an electrode assembly and a bonding piece, the electrode assembly is arranged in the shell, and the bonding piece is bonded with the cover body and the shell. The bonding piece comprises a base layer, a first bonding layer and a second bonding layer. In the first direction, the first bonding layer and the second bonding layer are arranged on different sides of the base layer respectively. The viscosity of the first bonding layer can be reduced, and the first bonding layer is bonded with the cover body. The viscosity of the second bonding layer is fixed, and the second bonding layer is bonded with the shell. And the secondary battery and the cover body are detached by reducing the viscosity of the first bonding layer, so that the detaching convenience is improved. And moreover, the secondary battery can be disassembled under the condition that the wrapping film is cancelled, so that the settable space of the secondary battery is favorably improved, and the capacity of the secondary battery is favorably improved.

The invention relates to the related technical field of oxford fabric production and processing, in particular to coating equipment for oxford fabric production and a process thereof, the coating equipment comprises an equipment support, an upper compression roller and a lower compression roller, and an upper mounting groove and a lower mounting groove are formed in the equipment support; an upper compression roller and a lower compression roller are each composed of an installation shaft, a compression roller body, a first connecting piece and a second connecting piece in a combined mode, and a coating auxiliary mechanism composed of an installation base, a guide rod, an impact head, a reset spring, a stress head, a stress wheel and a pull wire in a combined mode is arranged on the inner side wall of each compression roller body. The impact head is driven by the acting force of the stress head, the stress seat and the reset spring to form an impact effect on the inner side surface of the compression roller main body, so that the coating layer and the oxford cloth can be synchronously subjected to a certain amplitude of vibration effect when being extruded, and the combination effect of the coating layer and the oxford cloth is effectively improved; therefore, the final service life of the cloth is effectively ensured.

The invention discloses a loss characteristic negative temperature coefficient integrally-formed inductor and a preparation method thereof, and the method comprises the steps: preparing soft magnetic metal powder: carrying out passivation, coating, granulation and lubricant adding treatment on carbonyl iron powder and gas atomization iron nickel powder, and obtaining two kinds of soft magnetic metal powder; pressing the treated atomized iron-nickel powder to serve as a middle column of the integrally-formed inductor, and performing heat treatment; the middle column is bonded in the coil; and embedding the coil into the treated carbonyl iron powder, carrying out compression molding, and baking to obtain the iron core. The obtained integrally-formed inductor is high in inductance value, the loss of the integrally-formed inductor cannot be increased along with temperature rise, the conversion efficiency of the integrally-formed inductor at the temperature of 100 DEG C is higher than 25 DEG C, and the integrally-formed inductor has the advantages of being high in inductance and loss negative temperature coefficient.

The invention discloses a rubber material for double-sided vulcanization crosslinking bonding and a preparation method thereof, and belongs to the technical field of rubber bonding materials, and the rubber material comprises the following components in parts by mass: 180-90 parts of natural rubber RSS, 1-3 parts of cis-1, 3-butanediol, 1-3 parts of a vulcanizing agent, 1-3 parts of a vulcanizing agent and 1-3 parts According to the rubber material, 10-20 parts of 1, 4-polybutadiene rubber, 40-60 parts of carbon black, 1.5-2 parts of sulfur, 0.5-0.6 part of an accelerant, 6-7 parts of zinc oxide, 5-8 parts of a stabilizing auxiliary agent, 1 part of stearic acid, 2 parts of an anti-aging agent, 8 parts of aromatic hydrocarbon oil and 2.5-4 parts of p-tert-butylphenol acetylene resin are used, and the rubber material is used for bonding the ceramic lining plate and the metal framework through double-face vulcanization crosslinking. The mechanical property, the wear resistance and the elasticity of the rubber material are improved, the ceramic lining plate and the metal framework are completely attached, hollowing of a bonding surface is avoided, and the use requirement of the rubber material as a bonding material is met.

The utility model relates to the technical field of thin film deposition, and discloses a gas spraying assembly and a thin film deposition device. The gas spraying assembly comprises a cover plate, a spraying plate and positioning columns, the cover plate is provided with a gas inlet and at least one through hole penetrating through the two sides of the cover plate, the spraying plate and the cover plate are connected in a sealed mode, a cavity communicated with the gas inlet is reserved between the spraying plate and the cover plate, the spraying plate is provided with a plurality of spraying holes communicated with the cavity, and the positioning columns correspond to the through holes one to one. The positioning column is provided with a supporting portion used for supporting the cover plate, the supporting portion is arranged between the connecting end and the mounting end, one end of the supporting portion extends to the connecting end, and the area of the axial cross section of the connecting end of the positioning column is smaller than that of the axial cross section of the supporting portion of the positioning column. And the bonding strength between the cover plate and the spraying plate is ensured, and the performance and the service life of the gas spraying assembly are improved.

The embodiment of the utility model discloses a battery pack and electric equipment. The battery pack comprises a box body, a plurality of single batteries, a first protection part and a first adhesive layer, the box body is provided with a containing cavity and a first inner wall located in the containing cavity, the multiple single batteries are contained in the containing cavity, a gap is formed between every two adjacent single batteries, and each single battery is provided with a first surface facing the first inner wall; the first protection piece is arranged on the first surfaces of the two adjacent single batteries and seals a gap between the two adjacent single batteries; the first adhesive layer is arranged between the first inner wall and the first surface and between the first inner wall and the first protection piece. According to the embodiment of the invention, the gap is sealed by the protective part, the first adhesive layer is prevented from entering the gap, and the first adhesive layer is completely filled between the first inner wall of the box body and the first surfaces of the plurality of single batteries, so that the thickness of the first adhesive layer is more controllable.

This application relates to the field of silicone rubber composition processing, specifically disclosing a high-adhesion room temperature curing addition-type silicone rubber composition and its preparation method. The high-adhesion room temperature curing addition-type silicone rubber composition comprises: 100 parts of vinyl polysiloxane, 3-15 parts of crosslinking agent, 0.1-2 parts of catalyst, 8-35 parts of tackifier, 0.5-5 parts of tackifier accelerator, 5-30 parts of reinforcing filler, and 0.01-1 parts of inhibitor. The tackifier includes silane coupling agents containing epoxy and alkoxy groups and MQ silicone resin containing vinyl and alkoxy groups. The preparation method involves: mixing the vinyl polysiloxane with the reinforcing filler, dehydrating and cooling to obtain a base rubber; adding crosslinking agent, tackifier, tackifier accelerator, and inhibitor to a portion of the base rubber, mixing and degassing to obtain rubber compound B; adding a platinum catalyst to a portion of the base rubber, mixing and degassing to obtain rubber compound A; mixing rubber compound A and rubber compound B at a ratio of 1:0.8-1.2, degassing, and curing to obtain the finished product; it has the advantage of high bonding strength.

The present invention provides a glue coating device which is convenient for adjusting the glue coating thickness. A disc-shaped glue coating disk is arranged in a box body. The outer end of a rotating shaft connected to the glue coating disk is connected to a power unit. A sliding plate is arranged at the upper end box opening of the box body. A concave notch or a strip hole is arranged on the sliding plate which passes through the upper and lower plate surfaces. The upper rim of the glue coating disk protrudes from the concave notch or the strip hole to above the edge of the concave notch or the strip hole. The hole wall of the concave notch or the strip hole is clearance-matched with the disk surface and the circumferential disk edge of the glue coating disk. The adjusting mechanism drives the sliding plate to slide. The thickness of the colloid attached to the circumferential surface of the rim of the glue coating disk can be adjusted. This provides a guarantee for coating the carton with colloid of appropriate thickness. While ensuring the bonding strength, the waste of colloid can be reduced.

The utility model discloses a lens clamp, an optical assembly and a laser radar, and relates to the field of optical equipment. The adhesive dispensing groove is formed in the first clamping surface of the lens clamp, so that the adhesive dispensing groove can accommodate an adhesive in the bonding and fixing process of the lens, and the adhesive is easy to flow within the range of the adhesive dispensing groove even if the adhesive flows due to extrusion and is not easy to overflow to an optical plane outside the clamping space. Therefore, when the lens clip provided by the embodiment of the utility model is bonded and fixed with the lens, the adhesive is not easy to pollute the optical plane of the lens due to overflowing, so that the optical component has good performance. Furthermore, the first adhesive with higher hardness and the second adhesive with lower hardness are combined for use, so that not only is the bonding strength ensured, but also the problem that the lens is degummed or cracked due to larger stress caused by excessive use of the first adhesive is avoided.

The application provides a microcapsule, a composite fabric, a preparation method of the composite fabric and a summer quilt. The preparation method of the composite fabric comprises the following steps: A1, treating the top surface and the bottom surface of a moisture-permeable layer by using oxygen plasma; A2, adding microcapsules and a crosslinking agent into water to obtain a sticky liquid; coating the sticky liquid on the bottom surface and the top surface of the moisture-permeable layer in a dotted form, bonding the moisture-permeable layer and a moisture-removing and air-permeable layer by taking the top surface of the moisture-permeable layer as a bonding surface, bonding the moisture-permeable layer and a skin-friendly cool layer by taking the bottom surface of the moisture-permeable layer as a bonding surface, drying and hot pressing; the microcapsule comprises a core material and a shell covering the outside of the core material, the core material comprises a glue, and the glue is selected from glue A or glue B or a combination of the two, the glue A is a solvent-free moisture curing reaction type polyurethane hot melt adhesive, and the glue B is an acrylate with an epoxy group and / or a urethane group. The application can guarantee the moisture permeability and air permeability of the composite fabric.

The utility model relates to the technical field of building engineering main body outer wall nano-plastic outer flitch plate engineering construction, in particular to an auxiliary supporting device for nano-plastic outer flitch plate installation, which solves the problem that in the prior art, when an outer flitch plate is installed, supporting is not stable, and comprises an outer flitch plate supporting assembly, and fixing assemblies are arranged at the two ends of the outer flitch plate supporting assembly. The fixing assembly comprises an L-shaped fixing piece, the transverse part of the L-shaped fixing piece is provided with a reinforcing mechanism matched with the inner side of the wall, and the vertical part of the L-shaped fixing piece is connected with the outer flitch supporting assembly. The supporting device has the advantages that the nano-plastic outer flitch plate is stably erected on the bearing steel pipe, it is guaranteed that the inner side adhesive mortar cannot slide relative to the reinforced concrete wall body due to the dead weight of the plate, and therefore the bonding strength between the plate and the wall body is guaranteed, and the cracking and falling risks are avoided; a single person can install the whole plate and punch the anchor bolt without cooperation of others, so that the working efficiency is improved, and the construction progress is accelerated.

The invention provides a stepping motor, which comprises a shell, a stator assembly fixed on the shell and a rotor assembly supported on the shell and rotationally connected with the shell, and is characterized in that the stator assembly is arranged around the rotor assembly and is spaced from the rotor assembly; the rotor assembly comprises a rotating shaft and magnetic steel fixedly sleeving the rotating shaft. The two ends of the rotating shaft are rotationally connected with the shell. The stator assemblies are fixed to the shell, and the stator assemblies are arranged on the rotor assembly in a sleeving mode and arranged in the axial direction of the rotating shaft. The stepping motor further comprises a gasket, the gasket is fixed to the rotating shaft in a sleeving mode, the outer diameter of the gasket is larger than the diameter of the rotating shaft, the peripheral side of the gasket abuts against the magnetic steel so that a glue filling gap can be formed between the magnetic steel and the rotating shaft, and the glue filling gap is filled with glue. Compared with the prior art, the stepping motor controls the radial gap between the magnetic steel and the rotating shaft through the gasket, and further controls the gluing amount of the magnetic steel and the rotating shaft, so that the gluing strength can be ensured, and the performance and the stability of the stepping motor are improved.

The application discloses an intelligent imaging generation system and method, which realizes closed-loop control of spraying quality by real-time linkage adjustment of spraying mechanical arm and imaging equipment parameters through a dynamic parameter adjustment module, and combines a defect prediction and optimization decision module and a multi-modal process knowledge base. The system integrates a high-resolution visual sensor, a capacitive thickness detector and a temperature and humidity sensor, fuses multi-source data by using a Kalman filtering algorithm, and dynamically adjusts the speed of the mechanical arm, the nozzle pressure and the imaging gain coefficient. The defect prediction module simulates coating defect morphology based on a physically constrained generative adversarial network and generates a process optimization instruction set through reinforcement learning. The multi-modal process knowledge base stores an associated model of material characteristics, environmental data and defect patterns, supports incremental learning and historical data decay update. Through dynamic parameter collaborative optimization, defect prediction prepositioning and multi-modal data fusion, the spraying quality detection efficiency and coating consistency are improved, and the rework rate is reduced.

The application discloses a stone curtain wall with an assembling structure and an assembling method thereof, and relates to the technical field of buildings. The stone curtain wall comprises a wall body, a keel assembly, a first stone plate, a second stone plate, an elastic sealing element and a lamp strip assembly. The second stone plate under the action of gravity is hung on the keel assembly by using the cooperation of each hook part and each hanging groove. Then, the elastic sealing element and the first stone plate are used to cooperate with the first hook part under the action of gravity, the tongue block of the second stone plate is clamped in the installation groove in the up-down clamping mode, the second stone plate is firmly installed, and the second inclined keel is effectively prevented from being fixed by manual work or other tools in the curing process of the back adhesive, the hollow space between the second stone plate and the second inclined keel is effectively reduced, the effective area and the bonding strength of the back adhesive are ensured. In addition, the lamp strip assembly is used as the corner assembling element between the stone plates in the stone curtain wall, the lamp strip assembly is organically integrated into the stone curtain wall, the stone curtain wall has the night scene function, and the structural strength of the stone curtain wall is improved.

The invention relates to a film bonding technology for a heat dissipation plate of a special-shaped structure and a printed board. The film bonding technology comprises the steps of S1 film bonding technology formulation, S2 bonding tool design, S3 tool production, S4 film carving data processing, S5 film carving, S6 film poking, S7 cold bonding, S8 tool positioning, S9 preheating, S10 hot pressing, S11 cooling, S12 tool dismounting and S13 processing. According to the invention, through a parameter formulating technology, formulated process parameters need to be combined with the force applied to the cold plate stress area of the special-shaped structure and the area in contact with the printed board during hot pressing, so that the force can meet the film adhesion pressure requirement, the adhesion assembly cannot be damaged in the hot pressing link, the heat dissipation board and the printed board are adhered together, and the adhesion peeling strength requirement is met.

The utility model belongs to prefabricated building technical field provides a kind of precast wall with embedded connecting piece, the precast wall with embedded connecting piece includes mounting plate, several screw sleeves and several hooking ribs, mounting plate is equipped with several mounting holes, one side is joint surface, joint surface is used to be combined with wallboard;Several screw sleeves are one-to-one corresponding with mounting hole, screw sleeve protrudes joint surface and mounting plate fixed connection through mounting hole;Several hooking ribs are spaced apart in the side of the joint surface of mounting plate, one end is fixedly connected with joint surface, and the other end is provided with a hook.The precast wall with embedded connecting piece provided by the utility model, the hook of hooking rib and concrete form mechanical engagement, avoid the integral displacement of connecting piece along screw sleeve axis direction;After screw sleeve and mounting plate fixed connection, the bolt tightening force borne by screw sleeve, wallboard splicing stress can be transmitted to hooking rib by mounting plate, then by hooking rib disperses to wallboard concrete, greatly improves the combination strength of screw sleeve and wallboard.

The invention relates to the technical field of soldering paste production, in particular to no-clean low-residue soldering paste and a preparation method thereof.The no-clean low-residue soldering paste is prepared from, by weight, 93-99 parts of soldering powder alloy, 11-17 parts of scaling powder and 2-4 parts of additives, the solder powder alloy is one or a composition of more of a SnB i alloy, a SnB iAg alloy, a SnAgCu alloy, a SnPb alloy, a SnCu I n alloy, a SnAgCuSb alloy, a SnAgSb alloy, a SnPbB i alloy or a SnPbAg alloy; the soldering flux comprises the following components in parts by weight: 60-80 parts of a homogeneous solvent, 15-20 parts of at least one thixotropic agent, 13-28 parts of at least one activating agent and 12-15 parts of rosin. According to the invention, under the condition of ensuring the stability, wettability and bonding strength of the soldering paste, the use of rosin can be reduced, so that the overall residual quantity after soldering is reduced, the requirement that the residual quantity of soldering flux after reflow soldering is up to 2% is met, and the purpose of no cleaning is achieved.

The invention relates to the technical field of infrared detectors, and in particular to an inverted cone-shaped cold shield, which comprises: a cold shield side wall and a filter mounting plate located at the upper end of the cold shield side wall; wherein a cold shield light-through hole is provided at the center of the filter mounting plate, and an annular filter bonding area is provided around the cold shield light-through hole; the cold shield side wall comprises a first cold shield side wall located at the lower part and a second cold shield side wall located at the upper part, the first cold shield side wall and the second cold shield side wall are connected to each other, the second cold shield side wall is an inverted conical surface, the upper end diameter of the second cold shield side wall is larger than the lower end diameter thereof, and the lower end diameter of the second cold shield side wall matches the upper end diameter of the first cold shield side wall; the cold shield of the invention has an overall structure of being larger at the top and smaller at the bottom, which enlarges the inner diameter of the cold shield side wall while ensuring the bonding strength of the filter, thereby playing a role in suppressing stray light.

This invention provides a method for manufacturing a diamond wire saw for cutting silicon carbide single-crystal substrates. First, impurities are removed from the diamond micro-powder abrasive. During the abrasive application process, the abrasive density *a* on the steel wire is monitored in real-time via images and videos, and the feeding rate of the diamond micro-powder abrasive in the feeding container is controlled accordingly, achieving a first-step closed-loop control. In the subsequent nickel plating thickening process, the concentricity of the thickened layer on the steel wire and the continuous stability of its thickness are controlled. Before winding, the wire saw diameter *d* is measured using a laser method. Based on the mapping relationship between the wire diameter *d*, abrasive density *a*, and plating thickness *c*, a second closed-loop control is implemented for the entire wire saw production process. The two closed-loop controls operate nested together, ensuring precise control throughout the entire process. The diamond wire saw obtained by this method exhibits high continuous stability in various performance indicators, ensuring good process stability during the cutting of single-crystal silicon carbide substrates, thereby reducing cutting risks.

The invention discloses a ceramic coating marine cable connector, which comprises a connector shell, a conductive pin and an end cover, a composite protective coating system is arranged on the outer surface of the connector shell and the matching surface of the end cover, and a metal protective coating is arranged on the contact surface of the conductive pin. According to the ceramic coating marine cable connector and the preparation method thereof, the problem of galvanic corrosion of dissimilar metal is effectively solved through micro-arc oxidation / electronickelling differentiation bottom layer treatment, physical barrier and intelligent response cooperative protection is achieved through the graphene composite middle layer, a complete protection system is formed in combination with the super-hydrophobic top layer, and the corrosion resistance of the connector is improved. And finally, while the bonding strength of the coating is ensured, the corrosion-resistant life and maintainability of the connector in a marine environment are remarkably improved.