20results about How to "Eliminate stomata" patented technology

The invention discloses a modified ATO ceramic target material and a preparation method thereof. The modified ATO ceramic target material comprises the following raw material components in parts by weight: 89-98 parts of tin oxide, 1-10 parts of antimony oxide and 1-3 parts of doped oxide, and the doped oxide is at least one of ZnO, Bi2O3, TiO2 and Ta2O5. The specific metal oxide is adopted to perform doping modification on the ATO ceramic target material, the sintering atmosphere and the sintering temperature system are controlled, and the characteristics of the doped oxide and the interaction between the doped oxide and SnO2 are utilized, so that the sintering density of the target material is improved, pores of grain boundaries are eliminated, and the target material is prepared. And the conductivity of the target material and the stability of the target material in the magnetron sputtering process are further improved. The relative density of the modified ATO ceramic target material is larger than or equal to 97.8% and even can reach 99.2%; and the resistivity is less than or equal to 5.2 * 10 <-3 > omega.cm and even can reach 3.8 * 10 <-3 > omega.cm.

The present invention discloses a semiconductor device and a manufacturing and packaging method thereof, including a chip, a lead frame and a package body, wherein the lead frame includes a chip seat and pins, and also includes a guide lead, wherein the guide lead is connected to the chip and the pins respectively, and the middle section of the guide lead protrudes out of the chip, and the package body is injection molded to cover the chip and the lead frame, and the pin part protrudes out of the package body, and a pouring port is arranged on the package body, and the pouring port is arranged on a side close to the guide lead. The present invention arranges the pouring port on a side close to the guide lead, so that the package body can flow along the direction of the guide lead during injection molding, and effectively eliminates the pores and weld lines under the guide lead; the middle section of the guide lead protrudes out of the chip, so that the gap between the guide lead and the chip, and between the guide lead and the lead frame is expanded, so that the package body is smoothly filled in; the chip delamination, package body colloid cracking, water vapor intrusion, ion pollution and other problems are effectively prevented, and the service life of the semiconductor device is improved.

The present invention discloses a polyacrylonitrile-based carbon fiber and a preparation method thereof, and relates to the technical field of carbon fiber. A polymerization stock solution is prepared by continuous polymerization with acrylonitrile as the main monomer, and a homogeneous polymerization solution is obtained after de-monomerization and degassing. The homogeneous polymerization solution is spun by a dry-wet-jet molding process, and fiber precursors are obtained after washing, hot water drawing, drying, steam drawing and oiling in sequence. The fiber precursors are sequentially pretreated, pre-oxidized, and multi-stage carbonized to obtain carbonized fibers; the carbonized fibers are sequentially surface treated, washed, sized, and dried to obtain carbon fiber products. The present invention can prepare a new generation of carbon fiber products with comprehensive advantages of strength and modulus through the improvement of the overall process, laying a foundation for its subsequent wider application in multiple technical fields and multi-composite molding process systems.

The invention relates to the technical field of concrete construction, in particular to an attached vibrator mounting structure for thin-wall concrete retaining wall construction, which comprises a plurality of mechanical systems, an electrical control system and a template, each mechanical system comprises two displacement mechanisms, two adsorption structures and two fixing devices, the outer surface of each vibrator is clamped to the top of the corresponding displacement mechanism and the top of the corresponding adsorption structure through two corresponding fixing devices, and each displacement mechanism and each adsorption structure are in communication connection with the electrical control system. The device has the advantages that friction force and steering torque on the formwork can be improved, the steering capacity of the crawler belt on the formwork is enhanced, the slipping phenomenon is reduced, the vibrator can be rapidly installed on the carrier through the fixing assembly, and therefore the positioning time and the installation time of the vibrator are shortened through assistance of the crawler belt and the steering side wheels, and the production efficiency is improved. And the construction time can be shortened.

The utility model relates to the field of electrically-fused brick pouring molds, in particular to an electrically-fused brick pouring mold, which adopts the technical scheme that the electrically-fused brick pouring mold comprises a lower closing mold and an upper closing mold, a lower mold groove is formed in the top surface of the lower closing mold, an upper mold groove is formed in the bottom surface of the upper closing mold, a metal inner net is embedded in the lower closing mold, a material injection groove is formed in the lower closing mold, and the metal inner net is embedded in the material injection groove. And one end of the material injection groove extends to the top surface of the lower closing mold, and the other end of the material injection groove penetrates through the lower closing mold and extends to the top surface of the inner wall of the upper mold groove. The mold has the beneficial effects that a plurality of mold closing inner cavities are communicated through the inclined material injection groove, so that the effect of simultaneously injecting raw materials into the plurality of mold inner cavities through one material injection groove is achieved; the production efficiency of the electrically-fused bricks is greatly improved, the metal grids embedded in the mold are knocked, external vibration is conducted into the mold, the effects of improving the vibration conduction capacity of the mold and eliminating air holes generated in raw materials through vibration are achieved, and the quality of the finished electrically-fused bricks is greatly improved.

The invention relates to the technical field of new materials and application thereof, in particular to high-heat-conductivity organic silicon heat-conducting gel and a preparation method thereof. The high-heat-conductivity organic silicon heat-conducting gel is prepared from the following components in parts by mass: 16 to 20 parts of hydrogen-containing silicone oil, 28 to 35 parts of vinyl silicone oil, 0.3 to 0.6 part of a catalyst, 0.2 to 0.5 part of an inhibitor, 0.1 to 0.3 part of an epoxy group chain extender and 79 to 94 parts of composite heat-conducting filler, the composite heat-conducting filler comprises modified diamond, aluminum nitride and modified carbon nanotubes. According to the organic silicon heat-conducting gel with the high heat conductivity, the problems that in existing heat-conducting gel, the intrinsic heat conductivity of heat-conducting filler is low, the interconnection degree between the heat-conducting filler and silicone oil is limited, stability is poor, and the heat-conducting gel is difficult to be suitable for heat dissipation of microelectronic devices are solved, the intrinsic heat conductivity of the heat-conducting filler in the heat-conducting gel is higher, and the heat conductivity of the heat-conducting filler in the heat-conducting gel is improved; and mutual crosslinking between the enhanced heat-conducting filler and the silicone oil is enhanced, so that the anti-aging stability is enhanced.

This invention relates to the field of knife manufacturing technology and discloses a method for preparing a knife with antibacterial effects, comprising the following steps: smelting a nitrogen-containing antibacterial martensitic stainless steel blade blank; heating, cooling, and tempering the nitrogen-containing antibacterial martensitic stainless steel blade blank to obtain the blade; hot isostatic pressing of a pure titanium ingot to obtain a densified titanium metal handle; and connecting the blade to the densified titanium metal handle using a tin-silver-based brazing filler metal at 680°C to 750°C via induction heating. This invention solves the problems of decreased hardness and corrosion resistance caused by silver precipitation through the synergistic effect of nitrogen and silver, utilizing nitrogen solid solution strengthening and potential compensation mechanisms; and employs a low-temperature tin-containing brazing process to construct a physical barrier layer, blocking carbon diffusion to the titanium side and the formation of brittle phases, thus avoiding over-tempering softening of the blade substrate, resulting in a knife with high hardness, corrosion resistance, long-lasting antibacterial properties, and high connection strength.

This invention discloses a composite strengthening process for the surface of a hot-dip galvanized molten zinc transfer pump impeller, comprising the following steps: ① impeller surface pretreatment; ② supersonic spraying of a WC+15%Co coating; ③ laser remelting: laser remelting the WC+15%Co coating; ④ precision polishing of the remelted layer: polishing the WC+15%Co coating to achieve a surface roughness <Ra0.4μm; ⑤ PVD TiCN functional coating deposition: preparing a TiCN functional coating on the WC+15%Co coating surface using physical vapor deposition, achieving a TiCN coating surface roughness <Ra0.2μm. This composite strengthening process, through the synergistic treatment of supersonic spraying, laser remelting, and PVD coating, effectively seals surface pores in cast steel and cast iron impellers while simultaneously providing excellent corrosion resistance and zinc adhesion resistance. This completely solves the technical problem of cast steel and cast iron impellers being prone to zinc adhesion and corrosion in molten zinc, significantly extending impeller service life and improving hot-dip galvanizing production efficiency.

The invention discloses a molding process of a mining high-load multifunctional composite material, and relates to the technical field of polymer composite material molding processing, and the molding process comprises the following steps: preparing a surface layer composite master batch and a core layer composite master batch; the surface layer master batch and the core layer master batch are subjected to melt extrusion, and melts extruded by the two single-screw exhaust type extruders are converged into a co-extrusion die head; the metal net is pretreated, the pretreated metal net is guided into a guide-in channel of a co-extrusion die head, the metal net is compositely extruded through the co-extrusion die head, and a composite plate blank is formed; feeding the plate blank into a three-roller calender; feeding the composite plate blank into a slow cooling system; feeding the composite board into an infrared heating embossing system, heating the board, embossing anti-skid lines on the surface layer of the board, and cooling and shaping to obtain a finished product. Air holes and defects caused by exhaust type extrusion and volatile components are thoroughly eliminated through exhaust type extrusion, the mechanical property is remarkably improved, exhaust type extrusion is combined with the precise co-extrusion die head, and it is guaranteed that the thickness of each layer of ABA is uniform, and interface bonding is firm.

The invention provides a low-resistance temperature coefficient precision resistance alloy and a preparation method thereof. The alloy comprises the following components: less than or equal to 0.04% of C, 1.30%-1.50% of Si, 0.30%-0.55% of Mn, less than or equal to 0.010% of S, less than or equal to 0.010% of P, 19.70%-20.50% of Cr, 3.40%-3.70% of Al, 0.60%-1.0% of Fe and the balance of Ni and inevitable impurities. The alloy has a low resistance temperature coefficient and is widely applied to the fields of aviation, aerospace and high-end instruments and meters. The manufacturing method comprises the steps that smelting is conducted in a vacuum induction furnace, a steel ingot is obtained through casting and vacuum consumable remelting, and then heating, forging and heat treatment are conducted on the steel ingot. In the smelting process, the alloy components are ensured to be accurate by controlling the pressure in the furnace, the oxygen and nitrogen content and the smelting time. And during forging, the temperature is slowly increased to 1050-1060 DEG C, heat preservation is conducted for 2-3 hours, and finally forging is conducted to the needed form. And finally, carrying out heat treatment to improve the mechanical property and the resistance temperature coefficient stability of the material. The manufacturing method can effectively improve the alloy performance, is suitable for production of precision resistor elements, and has a wide market prospect.

The invention provides a self-healing and recyclable single-component joint filling adhesive and a preparation method thereof, and belongs to the technical field of organic polymer adhesives. The adhesive is prepared from the following components in parts by weight: 5.0 to 10.0 parts of epoxy resin, 7.0 to 20.0 parts of polyurethane modified epoxy resin, 5.0 to 10.0 parts of blocked isocyanate, 3.0 to 5.0 parts of hydrazide, 5.0 to 15.0 parts of liquid rubber, 2.0 to 5.0 parts of thixotropic agent and 30.0 to 50.0 parts of pigment filler. At room temperature, hydrazide and an epoxy group have chemical inertness, blocked isocyanate (which is unblocked by being heated to 130 DEG C) does not react with amino of hydrazide, and single-component packaging can be realized; the isocyanate group and reactive hydrogen atoms in hydrazide are subjected to an addition reaction to generate an acyl semicarbazide bond, and a large number of multiple hydrogen bonds can be formed between the acyl semicarbazide bond and a urethane bond, so that the single-component joint sealant is endowed with good self-healing and recycling performance.

The invention discloses a ceramic substrate and a preparation method thereof, and the preparation method comprises the following steps: S1, mixing raw materials of the ceramic substrate to obtain mixed material powder; s2, carrying out compression molding on the mixed material powder to obtain a ceramic substrate green body; s3, the ceramic substrate green body is placed under the conditions of normal pressure P0 and normal temperature T0, the temperature is increased and increased to reach the pressure P1 and the temperature T1, P1 / T1 = 1.80-5.10 kPa / DEG C, and the conditions are kept for glue discharging treatment; and S4, continuously increasing the pressure and the temperature of the ceramic substrate green body to reach the pressure intensity P2 and the temperature T2, simultaneously carrying out ultrasonic oscillation treatment with the frequency of V, enabling the ratio of P2 to T2 to V to be (0.6-1.5) MPa to 600 DEG C to (2-4) Hz, and keeping for sintering treatment to obtain the ceramic substrate. The ceramic substrate prepared by the preparation method has high density, high breaking strength and low porosity.

This utility model discloses a vacuum treatment device based on PVD coating technology, including an equipment cabinet, a side cabinet shell, and a rotating motor. A coating mechanism for coating is provided on one side of the side cabinet shell. The coating mechanism includes a coating tank fixedly connected to the equipment cabinet, with a sun gear movably connected inside the coating tank. The output shaft of the rotating motor is fixedly connected to a planetary carrier via a rotating shaft. This device can remove impurities such as oil and oxide scale from the workpiece surface, increase the specific surface area, and improve the mechanical bonding ability between the coating material and the workpiece. It solves the problems of poor film adhesion and easy peeling caused by the lack of sandblasting treatment in traditional devices. Furthermore, it ensures that the film material adheres tightly to the workpiece, effectively reducing defects such as bubbles and pinholes, especially for workpieces made of special materials, significantly improving the bonding strength between the film and the workpiece, as well as the performance and service life of the coated product.

The application provides an austenitic stainless steel casting in-situ micro-alloying modification method based on multi-field coupling and intelligent feedback, comprising the following steps: S1: mold presetting and machine learning model deployment; S2: master alloy smelting and pouring; S3: injecting a micro-alloying agent into the mold and carrying out multi-field coupling treatment on the molten steel; S4: predicting the microstructure evolution of the casting through a machine learning model, and adjusting the micro-alloying agent injection parameters and the multi-field coupling parameters in real time; S5: carrying out solid solution treatment and aging treatment on the solidified casting to obtain a final product. The application synchronously carries out the micro-alloying process and the solidification process, the multi-field coupling effect of the pulsed electromagnetic field and the ultrasonic field, and introduces a machine learning driven intelligent feedback system, so that not only the processing steps are provided, but also an intelligent casting system which can be self-adaptive and self-optimized is constructed, and a new technical path is provided for the performance customization production of high-end castings.

The invention discloses a seam welding method applied to arc-shaped tunnel steel pipe pieces. The seam welding method specifically comprises the following steps that S1, preparation is conducted; s2, preheating, wherein uniform preheating treatment is conducted on the joints; s3, positioning and welding, specifically, positioning and welding are conducted at the joints so as to fix the positions of the arc-shaped tunnel steel pipe pieces; s4, formal welding is conducted, specifically, a welding robot is adopted for conducting formal welding on the seam; s5, post-weld heat treatment is carried out; s6, inspection and correction are conducted, specifically, after welding is completed, seams are inspected, and defects are found and corrected in time; and S7, data uploading and recording: all parameters in the welding record and detailed data of heat treatment are uploaded to the system. According to the method, the position of the welding seam is divided into a plurality of welding layers, each layer is subdivided into a plurality of welding positions, the height of each layer of welding seam is 3-5 mm, and local heat treatment is carried out after each welding process is completed, so that the stress generated by the welding process is eliminated, and the microstructure is improved.

The application discloses a free forging check valve and relates to the technical field of valve manufacturing.The free forging check valve comprises a shell, a valve cover is arranged at the top of the shell, a rotating sleeve is arranged at the center of the valve cover, an adjusting gear is arranged outside the rotating sleeve, a reset rod is inserted into the rotating sleeve, a lifting block is arranged at the bottom of the valve cover, the valve cover and the lifting block are connected through a tensioning shaft, a sealing assembly is arranged between the valve cover and the lifting block, a valve seat is arranged in the shell, a rocker assembly is arranged at the bottom of the lifting block, and a valve clack is arranged at the tail end of the rocker assembly.The shell is manufactured by using a free forging near-net forming process, so that the air holes and sand holes and other defects in traditional casting can be eliminated, the strength of the shell is ensured, and Wood sealing is adopted, so that the applicable temperature and pressure range of the check valve can be significantly widened, the risk of sealing failure caused by temperature fluctuation and pressure impact can be effectively resisted, and long-term stable operation of equipment can be ensured.

The invention relates to the technical field of titanium alloy welding. The invention provides an electric arc, laser and ultrasonic multi-energy field coupled titanium alloy welding method. The welding method comprises the steps that S1, the surface of a to-be-welded substrate is treated, and matched assembling and fixing are conducted; s2, an electric arc-laser hybrid welding device is started for welding; s3, an ultrasonic vibration device is synchronously started, the to-be-welded substrate and the arc welding wire in the welding process are vibrated, and the vibration frequency and amplitude of the to-be-welded substrate, the advancing track of the laser and the laser power are operated in a matched mode according to preset logic; s4, after welding is finished, the electric arc-laser hybrid welding device is turned off; and S5, after the first preset time, the welding wire vibration device is closed, and after the second preset time, the substrate vibration device is closed. According to the multi-energy-field coupling welding method, through multi-energy-field coupling welding arrangement, the Marangei flow behavior in a welding seam is adjusted, welding seam grains are refined, and the mechanical property of a welding joint is improved.

The invention relates to the technical field of ceramic materials, and provides a preparation method of high-aluminum ceramic and the high-aluminum ceramic, the preparation method comprises the following steps: 1) preparation of ceramic slurry: weighing 6.5-9 kg of small materials, 5-7 kg of deionized water, 22-34 ml of a compound amino acid emulsifying aid and 12-20 ml of an active component, and sequentially adding into a ball mill for primary grinding; weighing 93.5-127 kg of alpha-aluminum oxide powder, 30-40.7 kg of deionized water and 2-3.2 kg of a compound emulsifier, and sequentially adding into the ball mill for secondary grinding to obtain ceramic slurry; 2) spray granulation: spraying the ceramic slurry into a granulation tower for atomization, and rapidly drying the atomized ceramic slurry to obtain ceramic powder; 3) dry pressing: pressing the ceramic powder through a dry press to obtain a blank; and 4) high-temperature sintering: sintering the blank body, naturally cooling, grinding and polishing to obtain a high-aluminum ceramic finished product. Large air holes and the number of the air holes in the high-aluminum ceramic structure are eliminated to a great extent, and various performance indexes are effectively improved.

The present invention provides a short-process composite ultra-high-speed laser cladding processing method based on Hawke's energy technology, the method comprising: using a cladding continuous laser beam to clad the surface of a metal workpiece; at the same time or when the liquid metal in the molten pool solidifies into a new cladding layer, using a heat treatment continuous laser beam to remelt the surface of the cladding layer; the cladding material is stacked layer by layer by the cooperation of the cladding continuous laser beam and the heat treatment continuous laser beam to form an ultra-high-speed cladding layer on the surface of the metal workpiece; within a preset time after remelting, the ultra-high-speed cladding layer within the strengthening temperature range is strengthened by using Hawke's energy processing technology. The present invention can significantly improve the internal and external forming accuracy and quality of metal parts and eliminate residual stress; and can greatly reduce the subsequent processing amount and processing procedures, significantly improve production efficiency, and reduce costs and waste generation.

This invention discloses an exothermic welding device for zinc-clad steel grounding electrodes of buried gas pipelines, belonging to the field of exothermic welding technology. Molten metal inside the reaction chamber flows into the welding cavity through a guide hole. A first interface channel for inserting the zinc-clad steel grounding electrode is machined on one side of the welding mold. A squeezing and vibration mechanism located on the outer circumference of the zinc-clad steel grounding electrode is installed inside the first interface channel. A second interface channel for inserting a connecting wire is machined on the other side of the welding mold. One end of the zinc-clad steel grounding electrode inside the welding cavity is connected to one end of the connecting wire to form the welding part. This invention, through inert gas pre-purging, can completely remove air from the welding cavity, avoiding oxidation and burn-off of the molten copper at temperatures above 2000℃ upon contact with air. This effectively reduces defects such as porosity and oxide inclusions inside the weld. The molten copper solidifies stably in an inert environment, forming a metallurgical-grade cast-welded connection, with stable and reliable conductivity and mechanical strength of the joint.