548results about How to "Guaranteed electrical performance" patented technology

The invention discloses a packaging method for high-capacity polymer lithium ion cells. The packaging method comprises the following steps: (1) a bag is formed from at least one of two aluminum plastic films by stamping; when the thickness of a cell is smaller than 6 mm, one bag is formed from one aluminum plastic film by stamping, and when the thickness of a cell is larger than or equal to 6 mm, bags are formed from the two aluminum plastic films by stamping; (2) the cell is loaded into an opening of the bag formed from one aluminum plastic film by stamping, and the opening of the bag is correspondingly covered with the other aluminum plastic film; (3) three edges of the cell are sealed in a hot manner with seal heads. With adoption of the packaging method for the high-capacity polymer lithium ion cells, the breakage rate of the aluminum plastic films is reduced, the aluminum plastic film use efficiency is increased, and electrical performance of the high-capacity polymer lithium ion cells can be guaranteed effectively; the packaging method is simple to operate.

The invention provides a lithium ion battery electrolyte and a high-energy-density lithium ion battery using the same. The lithium ion battery electrolyte comprises a non-aqueous organic solvent, a lithium salt and additives. The additives comprise a negative electrode film-forming additive, a nitrile or ether nitrile compound, an acid anhydride compound and a lithium salt type additive. Accordingto the lithium ion battery electrolyte, 0.3-20wt% of the negative electrode film-forming additive such as vinylene carbonate and / or fluorocarbonate can form an excellent SEI film on a carbon-containing negative electrode, a silicon-containing negative electrode or a silicon carbon alloy negative electrode and the like, thereby stabilizing the negative electrode and ensuring excellent battery performance; 0.2-6.5wt% of the nitrile or ether nitrile compound, the acid anhydride compound and a combination of them can complex metal ions of a positive electrode or form a protective film on the surface of the positive electrode, thereby stabilizing the positive electrode and improving battery performance; and the 0.5-3 wt% of the lithium salt type additive in the lithium ion battery electrolytecan lower the impedance of the battery so as to improve the low temperature performance of the battery or improve the high temperature performance of the battery.

A thermal anti-oxidation radiation resistance polyolefine thermal contraction material, comprising the following components by weight part: linear low density polyethylene 100-150 part, ethylene copolymer 30-80 part, polyolefine elastomer 20-40 part, cross-link sensibilizer 1-3 part, composite antioxidant 1-10 part, light stabilizer 1-5 part, halogen-containing fire retardant 20-60 part and antimony trioxide 10-30 part. The material is not only used in the nuclear island of the nuclear power station, but also widely used in the fields with higher material performance requirement such as navigation, shipping, nuclear submarine or the like.

The invention provides a polyphenylene oxide composition used for a photovoltaic junction box. The composition comprises the following components by weight: 55-95 parts of polyphenylene oxide, 45-5 parts of styrene resin, 2-10 parts of a flexibilizer, 5-20 parts of a phosphate fire retardant, 0.5-2.5 parts of an acid absorbent, 0.2-0.6 part of a hindered phenol main antioxidant, 0.2-0.6 part of a phosphite auxiliary antioxidant, 0.3-1.5 parts of an ultraviolet absorbent, 0.3-1.5 parts of a hindered amine light stabilizer, 0.1-0.5 part of a lubricating agent, and 0.1-1.0 part of toner. With the characteristics of good flame resistance, thermo-oxidative aging resistance, UV (ultraviolet) resistance, excellent electrical performances, the composition of the invention has flame retardancy up to grade UL945VA, RTI (relative temperature index)=110DEG C, CTI (comparative tracking index) PLC ( programmable logic controller)=2, and GWIT (glow wire ignition temperature)=750DEG C, thus satisfying the requirements in ROHS (restriction of hazardous substances) standard. Thus, the composition provided in the invention can be used for electronic and electrical component production of solar photovoltaic junction boxes, etc.

The invention discloses an embedding unpackaging method for a plastic packaged device packaged by a flip chip bonding process. The method comprises the following steps of: first longitudinally preparing a sample by adopting embedding sample preparation equipment; then grinding off a chip bonding soldering block in the sample to expose a chip bonding salient point by adopting an automatic / manual grinding system; next unpackaging the front surface or back surface of the sample, namely the surface with a chip circuit by adopting an acid etching method, wherein an opening has a size which is less than or equal to that of a chip, and is deep enough to expose the surface of the chip; and finally, immediately washing the acid-unpackaged sample, drying the sample with air and inspecting the dried sample. By the method, a semiconductor device packaged in a flip chip bonding way or a chip size package (CSP) way is unpackaged in a way of combining a mechanical method and the acid etching method, structures such as a bonding structure and the like in the sample can be integrally reserved after the sample is unpackaged, the electrical properties of the sample also can be maintained after the sample is unpackaged, and the requirement of subsequent inspection such as destructive physical analysis, failure analysis and the like on the integrity of the sample is completely met.

The invention discloses rhombus dispensing composite insulating paper, which is characterized in that the insulating paper consists of a polyester film layer, polyester fiber non-woven fabric layers for electrician insulation adhered to the upper surface and the lower surface of the polyester film layer by an F grade polyurethane adhesive, and a modified epoxy resin coated on the surfaces of the polyester fiber non-woven fabric layers for the electrician insulation in a rhombus shape. A method for preparing the rhombus dispensing composite insulating paper comprises the steps of preparing three layers of composite materials and preparing the rhombus dispensing composite insulating paper and so on. The adoption of the method has good product performance and a simple production technology, can save the manufacturing cost for an oil-immersed power transformer, and improve the quality; and a product of the invention is particularly suitable for insulating materials which are used for inter-layer insulation and inter-turn insulation of a foil winding coil of the oil-immersed power transformer and the inter-turn insulation of a mutual inductor.

The antistatic flame-retardant polyethylene composition consists of high density polyethylene 20-45 weight portions, antistatic polyethylene agglomerate 30-40 weight portions, and flame-retardant polyethylene agglomerate 25-40 weight portions. The antistatic polyethylene agglomerate includes two kinds of conducting carbon black of different specific surface areas and processed with processing agent, and has synergistic antistatic and flame-retardant performance, excellent machining performance and mechanical performance. The flame-retardant polyethylene agglomerate is composite flame retardant comprising halogen-containing organic compound and bromobenzene ether as main flame retardant and Sb2O3 as synergist and smoke suppressor. The composition has excellent antistatic performance, flame retardant performance, machining performance and mechanical performance, and is used in producing pipes in coal mine.

The invention discloses a lithium cobalt oxide material of a core-shell structure and a preparation method of the lithium cobalt oxide material. According to the lithium cobalt oxide material, both the core and the shell of the material are made of lithium cobalt oxides as substrates, the core is optionally doped with a doping element A, the shell is doped with a doping element X, and the weight percentage of the doping element X in the shell is greater than that of the doping element A in the core. The preparation method comprises the following steps: 1, mixing a lithium source, a cobalt source and a doping substance A', and performing calcining, crushing and screening in sequence, so as to obtain a core substrate material; 2, mixing the lithium source, the cobalt source and a doping substance X' so as to obtain a shell precursor; 3, mixing the shell precursor with the core base material, and performing thermal treatment, thereby obtaining the lithium cobalt oxide material of the core-shell structure. The lithium cobalt oxide material of the core-shell structure is novel in structure, the core and the shell are made of same substrate materials with slight doping amount differences, the core and the shell can be very well transitioned and fused together, and situations such as cracking or powdering can be avoided in the charge and discharge process; the lithium cobalt oxide material is simple in preparation and easy in industrial production.

The invention relates to a compression charging valve pile of a semiconductor apparatus with high power and full control. Two same IGCT elements of power apparatus are arranged in the middle of the compression charging valve pile; two radiators are arranged in the middle of the two IGCT elements of power apparatus, and another two radiators are respectively arranged in the outboard of the two IGCT elements of power apparatus; coaxial lines of every apparatuses are overlapping installed together; outside of the two radiators of two sides, a corresponding insulation washer, a supporting part and a spring plate are overlapping installed separately in the outside of the coaxial lines; at least three screws are arranged as a string evenly surrounding the axes between two spring plates; every apparatus and element are fixed together through every screw. By adopting the coordination of two supporting parts and the spring plate through the surrounded screws to fix the apparatuses, the invention has the electrical equipment capability of simple compression charging, even force for apparatuses and capability to ensure performance of components. The application of the supporting part of universal coordination component ensures a pressing force applied on the surface of apparatuses, avoiding the full parallel of the upper and lower surface and full vertical between the upper and lower surface as well as the axes of apparatuses. The application of the supporting part of the spring component ensures that the source of the pressing force after the pressure is unloaded by the forcing press.

The invention relates to an all-silver electronic paste and a preparation method thereof, and the all-silver electronic paste comprises the following components by weight percent: 86-90wt% of silver powder, 3-7wt% of organic solvent, 4-6wt% of polymer resin and 1-3wt% of inorganic additive. The preparation method comprises the following steps: (1) weighing the polymer resin and a solvent according to proportion, placing in a container, placing the container in a constant temperature water bath, carrying out dispersion and stirring on the resin and the solvent for 120 plus or minus 10 minutes, evenly mixing, keeping the water temperature of the water bath at 80 plus or minus 5 DEG C, using a 200-mesh nylon filter screen for removing impurities and then preparing an organic carrier; (2) weighing the silver powder and the inorganic additive according to the proportion, adding into the organic carrier obtained in the step (1), using a three-roller rolling machine for grinding and rolling, obtaining the all-silver electronic paste with the average fineness of less than 5mu m and further using a 500-mesh filter cloth or filter screen for removing the impurities. The obtained all-silver electronic paste has the advantages of good dispersion, superior performance and great environmental protection. The preparation method is simple and the production efficiency is high.

The invention provides a composite silver stannic oxide electric contact material, which comprises 5-15wt% of SnO2 and the balance of silver. The material also contains additive which comprises the oxide of one or two types of elements, such as copper, tungsten, bismuth, indium, antimony and tellurium, and the total weight of the elements accounts for 0.1-3% of the gross weight. Meanwhile, the invention also provides a preparation method for the composite silver stannic oxide electric contact material. The controllable and environmentally-friendly preparation method for the composite silver stannic oxide electric contact material, which has the advantages of relatively simple technology and relatively low production cost, is suitable for preparing various silver stannic oxide contact materials of stannic oxide powder of different grain diameters, and the stannic oxide powder and various additives can be enabled to be evenly distributed in a silver matrix.

The invention discloses an active phase-array antenna cooling plate electromechanical heat coupling design method based on the position of a component. The method includes the steps of determining a parameter of the heating component in an active phase-array antenna T / R assembly, designing the topology shape of a cooling plate flow channel and a geometrical model of an antenna cooling plate according to the position of the heating component, building a finite element model of an antenna, calculating array temperature field distribution of the antenna, calculating a phase error caused by structure deformation of the antenna and excitation current amplitude errors and phase errors caused by temperature changes, calculating electric performance of the active phase-array antenna, and determining a design scheme of the active phase-array antenna cooling plate according to gain index requirements. By means of the method, the active phase-array antenna cooling plate scheme based on the position of the component can be designed, heat generated by the heating component can be effectively dissipated, influences of the temperature changes on structure deformation and excitation current amplitude and phase can be analyzed in a quantitative mode, and the aims of improving temperature distribution and guaranteeing effective work are achieved on the premise that requirements of the electric performance and the structure mechanical performance of the antenna are met.

The invention discloses a preparation method for a composite material antenna cover with a thin-wall foam sandwich structure. The invention aims to solve the problem of difficult processing or incapable processing for a thin-wall foam sandwich layer in the process of preparation of an antenna cover with a sandwich structure. According to a technical scheme of the invention, processing of the entire body of the thin-wall foam sandwich layer comprises two steps: performing primary processing, namely subjecting an initial foam block to single-face mechanical processing; and performing secondary processing after subjecting the single-face mechanically processed foam block to reinforcing and rigidity increasing, i.e., subjecting the rest of faces of the thin-wall sandwich layer to processing on a combination of a rigid mold, a composite material panel and the single-face mechanically processed foam block so as to prepare the thin-wall foam sandwich layer meeting the technical requirements of a target antenna cover. In addition, through resin impregnation with fabrics and a vacuum bag molding technique, preparation of the composite material panel and bonding of the panel with the foam sandwich layer in the target antenna cover are realized. By adopting the preparation method provided by the invention, the difficulty of preparation of the thin-wall foam sandwich layer through processing of the entire body of the initial foam block is overcome; the molding process of the antenna cover is simple; and the prepared antenna cover has the advantages of few defects, light weight and good wave permeability.

The invention discloses a phase shift driving device of an electric tiled antenna, which is used for shifting at least one phase shift component of a phase shifter in the electric tiled antenna so as to change the phase position of a signal. The driving device comprises an axially-limited drive rod and a transmission lever, wherein an operating part rotating around the circumference is arranged at the first end of the drive rod; the driving rod is axially arranged with the drive rod and axially moves under the action of the drive rod to drive at least one phase shift component of the phase shifter to synchronously move; the first end of the driving rod and the second end of the drive rod are in mutual threaded mesh and are movably connected; and the second end of the driving rod is linked with the phase shift component of the phase shifter. The driving device has the advantages of simple structure, normal driving work, stable operation, accurate phase position adjustment of the phase shifter and capability of well meeting the requirement of a mobile communication system.

The invention relates to a flexible type radio-frequency coaxial cable of a smooth aluminum tube external conductor and a production method thereof, related to the improvement of the radio-frequency coaxial cable of the smooth aluminum tube external conductor, in particular to a preparation method for enhancing the bending performance and improving the flexible performance of the cable. The flexible type radio-frequency coaxial cable of the smooth aluminum tube external conductor comprises a smooth aluminum tube internal conductor, an internal skin layer, a foaming insulation layer, an external skin layer, the smooth aluminum tube external conductor, a hot melt adhesive layer and an external protection bush layer; the internal skin layer is extruded outside the smooth aluminum tube internal conductor and the foaming insulation layer is arranged outside the internal skin layer; the external skin layer is arranged outside the foaming insulation layer and the smooth aluminum tube external conductor is arranged outside the outer skin layer; the hot melt adhesive layer is coated outside the smooth aluminum tube external conductor and the external protection bush layer is extruded outside the hot melt adhesive layer.

The invention discloses an internally-arranged angle sensor all-in-one ultrasonic motor servo control system and relates to servo control over ultrasonic motors. The internally-arranged angle sensor all-in-one ultrasonic motor servo control system comprises a command module, a compensation module, a digital processing module, a drive panel and an all-in-one actuating mechanism. The command module sends out commands to the compensation module, and the compensation module converts the commands into frequency control signals and transmits the frequency control signals to the digital processing module; the digital processing module processes the frequency control signals into square signals and transmits the square signals to the drive panel, the drive panel amplifies the square signals and then inputs the square signals to the all-in-one actuating mechanism, the all-in-one actuating mechanism is a hollow ultrasonic motor with an internally-arranged angle sensor, the angle sensor feeds back speed and position information, the speed and position information reaches the compensation module after passing through the drive panel and the digital processing module, through comparison, compensation and conversion, newly-generated frequency control signals are transmitted to the drive panel, and therefore closed-loop control is achieved. The internally-arranged angle sensor all-in-one ultrasonic motor servo control system has high reliability, high precision and good environmental suitability, and is especially suitable for being used as shaft end servo control systems of platforms with multi-degrees of freedom.

An embodiment of the invention discloses an antenna used for a base station. The antenna used for the base station comprises at least two antennas, at least two outer cover structures, fixing components, connection components and an upper end cover, wherein each antenna is independently packaged in an antenna housing; the fixing components include a holding rod and a base, and the bottom of the holding rod is arranged on the base; the connection components include antenna connection components, outer cover connection components and holding rod connection components, the holding rod connection components are arranged on the holding rod, the top of each antenna is connected to the holding rod through the antenna connection components and the holding rod connection components, and the bottom end of each antenna is fixed on the bottom end of the holding rod; each outer cover structure is connected to the holding rod through the outer cover connection components and the holding rod connection components; each outer cover structure and each antenna are arranged at an interval, a lamination part of the side of the outer cover structure and the outer sidewall of the antenna housing are laminated, and an outer cover of each antenna is formed by the outer sidewall of the correponding antenna housing, the outer cover structure and the upper end cover together.

The invention relates to the bear radiation power cable which used in the nuclear island of the nuclear power station and its preparation method, which characteristic lies in that when the cable core section is circular, the outer of cable core covers the inner insulation layer; the outer of the inner insulation layer covers the outer insulation layer, between the outer insulation layer and the belt fills with the feed; the outer of the belt has a bandage; when the cable core section is fan-shaped, the belt directly covered the outer of the out insulation layer, and saved the stuffing. The flame-resistant bear radiant heat material which the outer bandage of the invention used through the electron accelerator radiation cross-linking craft, using the Malay acid anhydride as stem grafting, the most elongation ratio below 90% when the material under the loading, surpasses chemistry and so on crossing linking ways. The merit of the invention is the good radiation resistance and the good earthquake resistance and the bending property.

The invention discloses a high definition multimedia interface (HDMI) connector, comprising an insulating body, a plurality of conductive terminals which are distributed side by side, a screening can and a bottom cover, wherein the connecting parts of the plurality of conductive terminals are subjected to insert molding and then are buried in the insulating body; the contact parts of the plurality of conductive terminals extend horizontally and are divided into an upper row and a lower row which are respectively exposed out of the upper surface and the lower surface of a clapper of the insulating body; weld legs of the plurality of conductive terminals are bent downwards to be divided into a first row of weld legs, a second row of weld legs and a third row of weld legs which are arranged with clearances from front to back; the first row of weld legs is aligned with the third row of weld legs in the direction of front to back; and the second row of welding legs and the third row of welding legs are staggeredly distributed in the direction of left to right, thus effectively enlarging clearance between the two adjacent weld legs so as to ensure the electrical property of a product, and being convenient to carry out a tin soldering process of the product successfully so as to improve product quality and working efficiency.

The invention discloses a high-strength high-elongation flame retardant rubber insulated cable material and a preparation process thereof. The high-strength high-elongation flame retardant rubber insulated cable material comprises the following components in parts by weight: 8-14 parts of chlorinated polyethylene (CPE), 15-21 parts of ethylene-octylene copolymer elastomer (POE), 3-6 parts of fumed silica, 15-19 parts of aluminium hydroxide, 13-18 parts of calcined clay, 5-8 parts of 800# paraffin base rubber oil, 0.5-1 part of active magnesium oxide, 4-7 parts of superfine talcum powder, 1-2 parts of zinc oxide, 0.3-0.6 part of environmental stabilizer, 1-2 parts of microcrystalline wax, 0.5-1 part of titanium dioxide, 0.5-0.8 part of 4,4' bis(alpha, alpha dimethyl benzyl) diphenylamine, 1-2 parts of dicumyl peroxide and 1-1.5 parts of triallyl cyanurate. By adopting the high-strength high-elongation flame retardant rubber insulated cable material, uniform addition of inorganic powder is facilitated, a process range is wide, higher elongation at break is still maintained when a continuous vulcanizing temperature is 190-210 DEG C, a fire retardant and a high reinforced filler are added without reducing electrical property, and tensile strength and oxygen index are greatly increased; and cost is greatly reduced.

The invention discloses a pressure-operated load switch for a gas-insulated ring main unit. The pressure-operated load switch comprises a support, an upper support plate, a lower support plate, support insulators, an insulating cylinder, a fixed contact, a nozzle, a movable contact, a compressor sleeve, a conductive tube, a contact seat, a main shaft, a crank arm system and a guide rod, wherein a first high-voltage shielding case and a second high-voltage shielding case are arranged outside the insulating cylinder; the internal structure of the insulating cylinder forms a load switch arc-extinguishing chamber; the load switch arc-extinguishing chamber is fixed on the support through the support insulators and the upper support plate; the guide rod is fixed on the support through the lower support plate and the support insulator; the fixed contact and the movable contact adopt arc striking contact and conductive contact all-in-one structures; and airvents are formed on the fixed contact. The pressure-operated load switch has the advantages of small size, simple contact system, strong on / off capability, high action stability and long service life.

The invention discloses a preparation method for a high-performance modified graphite negative electrode, and in particular discloses a preparation method for a graphite negative electrode of a lithium ion battery. The preparation method mainly comprises the following steps of: conducting procedures of liquid-phase even mixing, drying, roasting, screening and the like to water-soluble phenol-formaldehyde resin, an aluminum source and graphite negative electrode material to be modified to prepare a graphite negative electrode which is modified jointly by pyrolytic carbon and aluminum oxide, wherein the surfaces of the pyrolytic carbon are coated with phenolic resin. The modified graphite negative electrode material has the characteristics of being high in reversibility specific capacity, high in first-time charging and discharging efficiency, long in recycling life and good in safety property. The modified technique is simple to operate, low in cost, and obvious in modification effect.

The invention discloses a round silicon thin film solar cell and a fabrication method thereof. The cell is composed of cell units connected in series, and takes a transparent substrate as a substrate, comprises a front electrode layer, a silicon thin film layer, a back electrode layer and a back paint layer which are stacked up in sequence. The round silicon thin film solar cell is characterized in that working faces of the cell units are formed by laser scribing, an external envelope takes an arc shape, a working face inside the cell is composed of n serially connected cell units which have equal effective area, n is not less than 2, at least two shielding lines and a laser scribing line or a dot-and-dash line which connects a positive electrode and a negative electrode are arranged between the positive electrode and the negative electrode of the cell, and the width between the positive electrode and the negative electrode is 0.03-0.10mm. The fabrication method adopts advanced laser marking technology, can scribe the cell units with fan-shaped or irregular figures, has high precision, and causes the width of an invalid region inside the solar cell to decrease from 0.5-1.8mm to 0.03-0.20mm, thus enlarging the effective working area of the cell.

The invention discloses a method for molding a multi-layer plate-type array-structure ceramic filter, relating to a processing and molding method of an electronic element, and comprising the followingmain steps: putting a ceramic body printed with positioning points on a working bench; loading the designed pattern for punching and molding by a computer, and setting parameters for the punching andcutting processes; setting the size of the light energy of a laser light source; controlling a machine vision system to scan the printed pattern on the ceramic body by the computer so as to automatically capture and recognize the positioning points, driving the working bench to move the ceramic body to a cutting position below the laser beam according to the positioning points, controlling a vibrating lens to move according to the position of the positioning points based on the designed pattern for punching and molding by the computer so as to carry out laser punching and cutting, and punching and cutting the inner hole and the outer profile of the ceramic body to mold the ceramic filter. The method for molding a multi-layer plate-type array-structure ceramic filter utilizes the laser toautomatically capture and cut, so that the cutting precision is high, the speed is high, and the damage on the surface of the filter is small. The method for molding a multi-layer plate-type array-structure ceramic filter is applicable to filters with requirements such as small space, high precision, large capacity, ultra-large thickness and diversity, and improves the production efficiency and the qualification rate of the filter products.

The present invention discloses a relay comprising: a housing having a base and a cover covering a side opening of the base; a coil element and a contact element accommodated in the housing; and an input terminal and an output terminal, are respectively electrically connected to the coil element and the contact element, and protrude from the bottom of the housing so as to be soldered to the circuit board. Wherein, the relay also includes a protective cover made of insulating material, the protective cover is covered on the bottom of the housing, and is used to seal the gap between the base and the cover; and the protection A first jack corresponding to the output terminal and a second jack corresponding to the input terminal are formed on the cover, and the output terminal and the input terminal pass through the first jack and the second jack respectively. Two jacks. In the present invention, the gap on the bottom of the casing is sealed by the protective cover, thereby effectively preventing solder flux from entering the interior of the relay and ensuring the electrical performance of the relay.

The invention discloses a manufacturing method of a high-flame-retardance low-release environment-friendly shield cable. The method comprises the following steps of material selection, wire drawing, intertwist of conductors or conductors, lapping of a fire-resistant insulation layer, extruded insulation, radiation crosslinking, cabling, metallic shielding, extrusion of an oxygen insulation layer,armouring, lapping, extrusion of an outer sheath, detection of product performance and packaging and warehousing of finished products. The manufactured cable overcomes the defects of high smoke formation and high toxicity of a flame-retardance wire cable of the halogen-containing series, also solves the problem that the flame-retardance wire cable of the halogen-containing series cannot reach therule of the new version of the civil building electrical design specification, and has the capacity of resisting external electromagnetic interference and the capacity of outward radiating electromagnetic interference of a system; the flame retardance of the cable can reach the grade A, the combustion performance of the cable can reach the grade B1, the smoke toxicity of the cable can reach the grade t0, the combustion dripping / particle grade of the cable can reach the grade d0, the corrosion resistance of the cable can also reach the grade a1, and the cable can be widely applied to civil buildings.

The invention provides a nano-silica modified silicon resin super-hydrophobic coating, and a preparation method and an application thereof. The nano-silica modified silicon resin super-hydrophobic coating is formed by grafting the surface of a nano-silica particle with a hydrophobic functional group molecule having low surface energy and high stability and then crosslinking with silicon resin. Theformed nano-silica modified silicon resin super-hydrophobic coating has low surface energy and a super-hydrophobic surface of a micro-nano binary coarse structure, and the static contact angle of thecoating is 159.6-161.8 DEG C. The super-hydrophobic coating provided by the invention has the advantages of high stability and high hydrophobicity; and the preparation method is simple and easy to implement, the hydrophobic coating is applied to live working tools and instruments, the safety of distribution network live working under the high-humidity condition can be improved, the application range of distribution network live working is expanded, and the operation safety and power supply reliability of a distribution network are improved.

The invention discloses a graphene lyogel thin-film preparation method. The method includes the steps that firstly, graphene micro-sheet colloid dispersion liquid is subjected to suction and filtration through a micropore filtering membrane, and then a graphene gel thin-film is obtained; secondly, a mixed solution of volatile liquid and non-volatile liquid is made to enter an internal three-dimensional hole network of the gel thin-film under the capillary action, the volatile liquid in the gel thin-film is removed through a vacuum drying method, and the non-volatile liquid is reserved in the gel thin-film. Since the gel thin-film contains the non-volatile liquid, the problems that graphene becomes graphite again due to lamination and then the conductivity of the graphene and the overall specific surface area of the gel thin-film are reduced due to collapse of internal holes of the gel thin-film in the preparation process of the graphene gel thin-film in the past are effectively solved; the thickness of the graphene lyogel thin-film is greatly reduced, so that the energy density is greatly increased when the graphene lyogel thin-film is used as electrodes of supercapacitors.

The invention provides a device for assembling an inner conductor assembly of an air dielectric radio frequency coaxial connector. The device comprises an upper pressing sleeve, an upper positioning pin, a middle pressing sleeve and a lower pressing sleeve assembly, wherein a pressing head is arranged at the lower part of the upper pressing sleeve, and the interior of the pressing head is perforated to form an upper fixing hole of the inner conductor assembly; the upper positioning pin is fixed to the upper pressing sleeve, and a pin head of the upper positioning pin is inserted into the fixing hole of the inner conductor assembly; an insulated supporting positioning groove, an inverted conical hole and an upper clamping ring positioning groove are arranged in the middle pressing sleeve along the axial line from top to bottom in sequence; a lower elastic positioning pin and a lower clamping ring positioning groove are arranged on the lower pressing sleeve assembly; the lower elastic positioning pin penetrates through the lower clamping ring positioning groove; the interior of the lower elastic positioning pin is perforated to form a lower fixing hole of the inner conductor assembly; the lower pressing sleeve assembly is arranged below the middle pressing sleeve; and the lower clamping ring positioning groove is opposite to the upper clamping ring positioning groove. The device has the outstanding advantages of simple structure, low manufacturing cost, high commonality, and convenience in assembly, and the production efficiency and the product pass rate are also greatly improved.