274results about How to "Good electrical performance" patented technology

The invention relates to a leadless platinum electrode slurry and process for preparation, wherein the platinum electrode slurry is prepared from 2-10mass% leadless glass adhesive, 2-10mass% metal oxide, 10-20mass% organic adhesive, and ultra-fine platinum powder at left amount. The production comprises leadless glass adhesive preparation, organic adhesive preparation, leadless platinum electrode slurry formulation, and slurry treatment. The invention can produce leadless platinum electrode slurry which lead content is lower than 100ppm, while the slurry applied in the electrode of zirconium oxide oxygen sensor can sinter at 1200DEG C, and via the formula adjustment of the leadless glass adhesive, the invention can produce platinum electrode slurry which can sinter at 800-1500DEG C. The electrode has the advantages of strong zirconium oxide substrate adhesive force, high conductivity, and stable electrical property.

The invention relates to a preparation method of antifouling flash insulator coating which is prepared by mixing fluorine-containing polysiloxane component A, linear hydroxyl-terminated polysiloxane component B, organic and inorganic silicon dioxide taken as reinforcing material component C, functional powder material component D, cross-linking agent E, catalyst component F and tackifier component G. The method prepares the single-component moisture curing antifouling flash insulator coating which is removed alcohol and oxime by adding fluorine-containing silicon material into the hydroxyl-terminated linear silicone and the reinforcing material, and has good electrical performance and aging resistance, better antifouling flash capability and excellent hydrophobicity and hydrophobicity migration performance.

The invention relates to a phosphoric polyester fire-retardant epoxy resin composition. The compositions by mass portion of the phosphoric polyester fire-retardant epoxy resin composition are: 20 to 40 portions of epoxy resin, 5 to 20 portions of phosphoric polyester, 0 to 10 portions of other curing agent, 0.1 to 0.3 portion of curing accelerator and 30 to 70 portions of inorganic filler. The phosphoric polyester fire-retardant epoxy resin composition does not contain harmful substances such as halogen, antimony trioxide and so on; the fire resistance can reach the fire-retardant standard of UL94 V-0; and the phosphoric polyester fire-retardant epoxy resin composition has good fire resistance and electric property.

The invention discloses an outdoor electric-insulation modified epoxy resin composition which comprises an epoxy resin, a curing agent, a curing accelerator and an inorganic filler. The outdoor electric-insulation modified epoxy resin composition has the advantages of high weather resistance, favorable hydrophobicity, high volume resistivity, high tracking resistance, high arc resistance, low thermal expansivity and the like, and can be used for manufacturing suspension insulators for alternating current transmission lines as well as umbrella skirts of cross arms and other outdoor insulation parts. Compared with the silicon rubber umbrella skirt, the umbrella skirt prepared from the composition can prevent birds from damage, resist line walking trampling, avoid shipping damage and the like.

The invention discloses a polyolefine sheathing compound for a coaxial cable and a preparation method thereof. The sheathing compound consists of the following components in parts by weight: 60-90 parts of ethylene-propylene-diene rubber, 5-25 parts of high-density polyethylene, 5-15 parts of functional polyolefin resin, 180-200 parts of flame retardant, 1-3 parts of surface modifier, 0.01-0.05 part of crosslinking agent, 0.5-2 parts of antioxidant and 1.5-9 parts of processing aid. The preparation method comprises the following steps of: putting the flame retardant into a high-speed stirrer for stirring at a high speed at the temperature of not lower than 80 DEG C; adding organosilane and stirring for 3-5 minutes; putting the remaining materials into the high-speed stirrer for continually stirring for 3-5 minutes; adding into a double-screw mixing extruder set by using a feeder for pelletizing; and drying. The sheathing compound has the advantages of flame retardance, low smoke, freeness from halogen, low toxicity, freeness from harmful heavy metals such as lead, cadmium and the like, freeness from phosphorus, difficulty in burning and small smog harm in case of fire, environmental friendliness, high temperature resistance level of 105 DEG C, high extruding performance, excellent electric performance, no need of subsequent crosslinking after stranding, saving in a large amount of manpower and materials and great reduction in the manufacturing period of the cable.

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 relates to a low-profile lens antenna capable of realizing wide-angle scanning. The lens antenna comprises a lens and a feed source positioned on the focal plane of the lens; beam scanning and tracking can be realized by mechanical control on the feed source; the lens has an electromagnetic wave focusing function, and the appearance of the lens can be flat-plate-shaped or curved-surface-shaped, and conformal design with a carrier platform can be realized; the effective dielectric constant distribution characteristic of the lens is that the effective dielectric constants are decreased from the center to the edges along the horizontal and longitudinal directions; the regulation and control on the effective dielectric constants can be realized by changing the structure or dimensions of the metamaterial units; and the assembling and preparation of the lens at a low cost is realized by multiple metamaterial panels in a stacked manner. The low-profile lens antenna has the characteristics of broadband, high gain, low profile, easy conformal property and the like, and is particularly suitable for high-gain conformal vehicle-mounted or missile-borne platforms in the fields of communication measurement and control, and the like.

The invention relates to a solar cell technology, aims to solve the problem of poor electrical performance and stability of conductive silver paste in the conventional solar cell, and provides a preparation method of graphene compound silver paste and the graphene compound silver paste. According to the technical scheme, the preparation method of the graphene compound silver paste comprises the following steps: preparing a silver / graphene compound, and preparing silver-coated glass powder; preparing an organic carrier; mixing the obtained silver / graphene compound, the silver-coated glass powder, the organic carrier and an inorganic additive as required, dispersing fully, measuring the viscosity, and adjusting the viscosity to obtain uniform graphene compound silver paste. The graphene compound silver paste has the beneficial effects of higher electrical performance and higher stability, and is suitable for conductive silver paste.

The invention relates to a stuffing for a capacitor. The stuffing for the capacitor, according to the quality percentage, comprises 20% to 40% of vegetable oil, 2% to10% of paraffin, 45% to75% of stuffing, and 0.5% to 5% of vegetable oil antioxidant additives. The preparation method of the stuffing for the capacitor includes the following procedures: the vegetable oil is heated up to 80 DEG C to 120 DEG C, is under vacuum treatment at least 8 hours, then breaking the vacuum, is added into vegetable oil antioxidant additives, and is under vacuum treatment again at least 8 hours with the temperature keeping in the range of 80 DEG C to 120 DEG C. The paraffin is heated up to 70 DEG C to 120 DEG C to melt. The stuffing for the capacitor can be obtained through mixing the vegetable oil after the heat treatment, melted paraffin and the stuffing together. The stuffing for the capacitor has electrical performance and physics and chemistry performance.

The invention discloses sliver electrode slurry for a back electric field of a silicon solar cell and a preparation method thereof, and the silver electrode slurry for the back electric field of the silicon solar cell comprises the following components by weight percent: 60-70% of spherical silver powder, 0-5% of flaky silver powder, 2-6% of glass powder with a high-temperature softening point, 1-3% of glass powder with a low-temperature softening point and 20-30% of organic bonding agent. The particle size of the spherical silver powder is 0.5-2.5 mu m, and the tap density is above 4.5g / ml; the particle size of the flaky silver powder is below 5 mu m, and the tap density is above 4.0g / ml; and the glass powder with the high-temperature softening point is a PbO3-B2O3-SiO2-ZnO glass system, and the glass powder with the low-temperature softening point is a Bi2O3-B2O3-SiO2 glass system. The slurry is applied to a sliver electrode of the back electric field of the silicon solar cell; furthermore, after fast high-temperature sintering by a chained belt furnace, the adhesive capability is strong, the soldering resistance is good and the photoelectric conversion efficiency of a product is high.

The present invention is one silane-crosslinked fireproof insulating polyethylene material for the insulating layer of wire and cable. It consists of polyethylene 100 (in weight portions, the same below), silane crosslinking agent 0.8-2.5, lubricant 1.5-5.0, bromine fire retardant 10-100, antioxidant 0.02-2 and metal deactivator 0.05-1.0. The plastic of the present invention has oxygen index over 30 to ensure fire retarding requirement. It is produced through two steps including the preparation of silane grafted material and the preparation of fire retarding mother material. When used, the silane grafted material and the fire retarding mother material are mixed. The present invention has the advantages of high fireproof performance, high mechanical performance, good electrical performance and excellent heat performance, and is suitable for use in insulating layer of wire and cable, corrugated pipe in automobile, etc.

A nonaqueous electrolyte secondary battery including a positive electrode including a positive electrode current collector carrying a positive electrode material mixture layer thereon, a negative electrode including a negative electrode current collector carrying a negative electrode material mixture layer thereon, a separator provided between the positive electrode and the negative electrode and a nonaqueous electrolyte solution, wherein the positive electrode current collector is a conductive body containing aluminum and the positive electrode material mixture layer includes a first material mixture layer and a second material mixture layer formed on the first material mixture layer. The first material mixture layer is made of a first material mixture containing a first organic material which is soluble or dispersible in water and the second material mixture layer is made of a second material mixture containing a second organic material which is soluble or dispersible in an organic solvent.

The invention discloses a new structure transformer, which belongs to the energy conversion installment. It completely avoids the welding, the big vice-side electric conduction area can realizes the output of the big electric current, the big cooling surface, the good radiation effect, the simple structure, the convenient service. The technical characteristic of the invention is that it includes the ferrite core, the primary side winding, vice-side, the vice-side is composed of left place body and the right place body, the left groove and the right groove separately opened on the left place body and the right place body, the left groove divides the left place body into the left stele and the left outside place body, the left stele and the left outside place body are connected in the base; the right groove divides the right place body into the right stele and the right outside place body, the right stele and the right outside place body are also connected in the base; the iron core placed in the groove, the primary side winding rolled around the iron core, the insulating layer has separately establishes between the primary side winding and the vice-side winding, between the primary side winding and the iron core.

The invention is applicable to the technical field of communication and provides a broadband dual-polarized radiating element. The broadband dual-polarized radiating element is used for being installed on a metal reflective plate to form an antenna. The broadband dual-polarized radiating element is characterized in that the radiating element comprises two pairs of orthogonally polarized dipoles which are used for sending or receiving communication signals, each dipole is correspondingly connected with a pair of Baluns, the bottom of each Balun is connected with an annular base, each dipole comprises a first radiating arm and a second radiating arm which are not symmetrically arranged, and two adjacent radiating arms between the dipoles are arranged at the same plane. The invention further provides the antenna which comprises the broadband dual-polarized radiating element. Therefore, the broadband dual-polarized radiating element and the antenna of the broadband dual-polarized radiating element have the advantages of being capable of reducing cross coupling between a high frequency radiating element of a multifrequency antenna and a low frequency radiating element of the multifrequency antenna, simple in structure, convenient to process, high in reliability and good in electrical performance.

The invention relates to the technical field of lithium ion batteries, especially to a rapid precharge method of lithium ion batteries. The precharge method provided by the invention comprises the following steps of: (1) letting a liquid injection stand, placing an electrical core between two flat plates and applying pressure; (2) precharging the electrical core with heavy current; (3) carrying out vacuum pumping and packaging. The method provided by the invention is used to charge with heavy current under a certain pressure, thus guaranteeing good internal pole piece interface of the electrical core, reducing polarization during the precharging of the electrical core with heavy current, preventing local over-charge of the negative electrode, simultaneously shortening the formation time, guaranteeing the smooth discharge of gas generated during the formation and forming a uniform SEI membrane when precharging the electrical core with heavy current. Therefore, the performance of the electrical core is improved.

The invention discloses a quick-blind-mating floating-type-mounted RF coaxial connector and a connecting method thereof. The RF coaxial connector comprises a socket and a plug. The socket comprises an inner conductor jack, an insulator, a socket outer conductor, a floating sleeve, a spring and a mounting panel. The plug comprises a plug outer conductor, an inner conductor inserting pin, an elastic collar and a mounting board. The elastic collar is connected with an engaging trough in an adapted engaging manner. The inner hole linear section of the socket is in insertion fit with the outer cycle linear segment of the plug. According to the RF coaxial connector, on the condition that the plug is inserted into the socket, two reference surfaces are superposed, thereby forming a theoretical zero clearance and ensuring continuity of capacitance. Furthermore a specific engagement structure is utilized, thereby eliminating radial clearance and preventing axial endplay clearance in a stationary state in insertion. Furthermore the quick-blind-mating floating-type-mounted RF coaxial connector and the connecting method have advantages of small size, compact structure, low reflection coefficient, low voltage standing wave, full-band linear voltage standing-wave ratio, excellent shielding efficiency, etc.

The invention relates to a lead-free silver electrode size and a preparation method thereof. The invention is characterized in that the size comprises the following compositions in portion by weight: 60 to 75 weight portions of ultrafine silver powder, 2 to 10 weight portions of lead-free glass binder, 2 to 5 weight portions of oxide and 10 to 30 weight portions of organic binder. The lead-free silver electrode size can completely replace a conventional leaded glass size; and the lead-free silver electrode size can be fused through sintering at a temperature of 600 DEG C and has good fluidity, can be wetted with a ceramic substrate and shows stable performance and good electric performance.

The invention discloses a polyurethane resin potting adhesive with a high bonding strength, which is composed of a component A and a component B. The component A comprises castor oil and polyether polyatomic alcohol in parts by weight; the component B comprises hydroxyl-terminated polybutadiene, MDI (diphenylmethane diisocyanate), an accelerating agent and an additive; the molar ratio of hydroxyls of the hydroxyl-terminated polybutadiene to isocyanate radicals of the MDI is 0.06-0.25; and the MDI contains no less than 80 wt% of 4,4'-MDI and residues of isomerism homologues of the MDI or the modified MDI which contains no less than 80 wt% of the 4,4'-MDI isomer. The polyurethane resin potting adhesive disclosed by the invention has the high bonding strength and particularly has good bonding performance with plastic materials (PA66) including nylon and the like; and the polyurethane resin potting adhesive has good electric performance, lower inner stress and excellent heat impact resistance and is particularly suitable for potting and packaging electronic elements which have more demanding requirements on the inner stress, such as a reversing radar, a tire pressure monitor and the like.

The invention discloses a working electrolyte solution of an 800 V aluminum electrolytic capacitor. The working electrolyte solution comprises, by weight, 30%-65% of main solvent, 10%-35% of auxiliary solvent, 5%-25% of solute, 5%-15% of spark voltage improver and 1.5%-3.5% of additives. The invention further discloses a preparation method of the working electrolyte solution. The working electrolyte solution makes a 700 V-750 V superhigh voltage technical breakthrough and can directly reach the 800 V superhigh voltage technical field, and the working electrolyte solution has the advantages of being high in working voltage, long in service life, stable in performance under a high temperature environment, good in pressure resistance of products, good in gas production performance and the like.

The invention discloses a copper bar connector and a terminal assembly. The terminal assembly includes a first power supply terminal, a second power supply terminal disposed symmetrically with the first power supply terminal, a first reinforcement terminal attached to the outside of the first power supply terminal, and a second reinforcement terminal attached to the outside of the second power supply terminal. The first and second reinforcement terminals are capable of causing a first resilient piece and a second resilient piece to generate inward clamping force. The second reinforcement terminal can be mutually buckled with the first reinforcement terminal. A fastening member can tightly hold the terminal assembly from a rear direction, thereby integrating the terminal assembly into an integral body. Thus, the copper bar connector and the terminal assembly of the invention can provide better electrical performance, stable current transmission and long-term reliable connection.

The invention belongs to the field of composite materials and in particular relates to a laminated metal chalcogenide (LMC) / carbon nanotube (CTNs) flexible compound film material of a highly ordered structure and a preparation method thereof. The composite material comprises an ultrathin self-supporting (transparent) CNTs film substrate and an LMC film which uniformly wraps the surface thereof to form the flexible composite film material which has a nanoscale porous structure and a three-dimensional network structure of a high electric channel. The preparation method comprises the following steps: providing an alloy bracket for bearing a self-supporting CNTs film and cleaning the carried CNTs film under a heating condition with plasma; and preparing the LMC / CNTs composite functional film material from the pre-treated CNTs film at an air pressure of 0.2-2Pa and at a temperature of 30-800 DEG C by virtue of a magnetron sputtered deposition technology. According to the material provided by the invention, a crispy laminated metal chalcogenide functional two-dimensional (2D) material and one-dimensional (1D) CNTs are effectively connected to form a three-dimensional (3D) network structure of structural flexibility.

The present invention discloses one kind of green fireproof composite polypropylene material, which consists of grafting polyolefin-base montmorillonite master batch 5-10 wt%, glass fiber 5-15 wt%, no-halogen expanding fire retardant 25-35 wt%, polypropylene resin 35-64 wt% and machining assistant 1-5 wt%. The green fireproof composite polypropylene material has completely stripped montmorillonite master batch, and montmorillonite, glass fiber and fire retardant homogeneously dispersed in polypropylene base. It has fire retarding performance up to UL-94 V0 level, high mechanical performance and excellent electrical performance.

The invention provides a halogen-free non-phosphorization flame-retardant epoxy resin composition and a preparation method thereof. The preparation method comprises the following steps of: premixing the common epoxy resin, flame-retardant epoxy resin, a curing agent, a curing accelerator, a flame-retardant synergistic agent and an inorganic filler; melting, mixing and extruding; and crushing and sieving to prepare the halogen-free non-phosphorization flame-retardant epoxy resin composition. The flame-retardant epoxy resin composition does not contain harmful substances such as halogen, diantimony trioxide, phosphorus and the like, has excellent fire resistance which can reach UL94V-O grade flame-retardant standard and high electrical property, can be applied in the fields of electronic packaging and copper-clad laminate.

The invention discloses a high-speed backplane connector with a circuit board, which is provided with a rectangle shielding interface and comprises an insulating fixed shell, an auxiliary fixed shell, a plurality of veneers, a plurality of signal contact members, a plurality of pressed-on feet, a plurality of rectangular shielding pieces and a plurality of circuit board transmission bodies. The conductive coating of the circuit board is applied to realize high-speed transmission of differential signals, thus avoiding signal crosstalk incurred by the general use of the middle part of the differential signal contact member. The connector of the invention is characterized by simple structure, superior electric performance and high-quality work.

The invention discloses an epoxy resin premix which is characterized by containing epoxy resin mixture and curing agent mixture, wherein the epoxy resin mixture includes epoxy resin, color paste, aluminum hydroxide filler and epoxy resin efficient fire retardant and the curing agent mixture includes methyl tetrahydrophthalic anhydride, accelerator and aluminum hydroxide filler. Aiming at solving the problems that in the prior art, epoxy resin is utilized for pouring a dry type transformer, various harmful substances are probably generated and the practical production and application can not be met, the invention provides the epoxy resin premix and a preparation technology of the epoxy resin premix, wherein the epoxy resin premix has low viscosity, a long service cycle, convenience for pouring, small curing shrinkage, property of being not apt to crack, good heat conductivity, good resistance to abrasion, corrosion and heat, high mechanical strength and preferable electrical property. The epoxy resin premix can be used for pouring dry type transformers, current transformers, voltage transformers, insulators, cushion blocks and the like.

The invention relates to a high-integration converter module, which comprises a power unit, a radiator, a drive plate, a busbar and a controller, wherein a composite busbar is adopted as the busbar; the busbar sequentially comprises a first anode layer, a three-phase rectifier input layer, an output layer, a second anode layer and a cathode layer from left to right; the overall composite busbar is in an inverted L form after being assembled; the overall busbar is divided into busbar horizontal parts and busbar vertical parts; the busbar vertical parts and an IGBT installation plate of the power unit are tightly laminated; the busbar horizontal parts are horizontal detection parts; and wiring terminals on the horizontal detection parts are distributed by layers. The busbar of the converter module is arranged by layers; the arrangement orders of various layers of the busbar are matched with a circuit structure of the power unit, so that signal traces are reduced to the maximal extent; the anti-jamming capability of the module is strengthened; various devices of the converter power unit are integrated through the busbar; the high-integration converter module is convenient to install, compact in structure and good in electrical performance; and the product stability is good.

The invention discloses base oil of transformer oil and a preparation method as well as application thereof. The preparation method of the base oil of the transformer oil comprises the following steps: 1) performing hydropretreatment on SZ36-1 common cut 3 distillate oil for acid removal; 2) performing furfural refining on the SZ36-1 common cut 3 distillate oil to obtain refined oil, and obtaining furfural removed refined oil after removing furfural; 3) performing denitrification on the furfural removed refined oil, removing nitride slag of the furfural removed refined oil, and obtaining denitrogenized refined oil; and 4) adding clay to the denitrogenized refined oil for clay refining to obtain the base oil of the transformer oil. The preparation method widens raw material source of the base oil of national transformer oil, can provide brand-new base oil of No. 25 transformer oil for the market. In addition, the method has the advantages of simple technological process flow, mild operating conditions, and high yield of target objects; and the base oil of the transform oil has wide market application space.

The invention discloses a microstrip coupled radiation unit for a broadband dual-polarized directional base station antenna. The unit comprises a reflecting bottom plate, a feed baron and radiating arms fixed on the reflecting bottom plate, wherein the number of the radiating arms is four; every two of the four radiating arms are opposite to each other to form a symmetrical vibrator; the two groups of formed symmetrical vibrators are arranged in a cross shape; and the feed baron is fixed with the radiating arms so as to feed the vibrators in a coupling mode through an insulated fixing device. The microstrip coupled radiation unit has excellent gain, standing wave, isolation, cross polarization, third-order intermodulation and other electric properties. Therefore, the communication quality in a service area can be well guaranteed from the aspect of antennas.

The invention discloses a method for manufacturing a low-voltage power cable used in a third-generation nuclear power station containment vessel, and relates to the field of cable manufacturing. The manufacturing method comprises the steps of material selecting, wire drawing, annealing tinning, conductor stranding, inner insulating layer and outer insulating layer co-extrusion wrapping, irradiation crosslinking, cable forming, packing layer extrusion wrapping, outer sheath layer extrusion wrapping, irradiation crosslinking, performance check testing and finished product packaging and warehousing. Material selecting comprises the steps that copper wire blank for electrical purposes is selected to be used as conductors, and high polymer materials are selected to be used as insulating materials and sheath materials, wherein according to long-time heat resistance evaluation, the service life of the high polymer materials is longer than 60 years. The low-voltage power cable manufactured through the method is greatly improved in service life, irradiation resistance and fire resistance and can operate by more than 60 years under the normal working conditions of a third-generation nuclear power station, and the fact that the functions of the low-voltage power cable can still be executed under DBAs and Post-DBAs.

The invention relates to the technical field of material processing, in particular to a metal shell of an electronic product and a manufacturing method of the metal shell. The manufacturing method of the metal shell comprises the following steps of material preparation, shell forming, roughening treatment, injection molding and finished product shaping. The roughening treatment step includes the procedure of pretreatment, the procedure of anodic oxidation film forming treatment and the procedure of roughening liquid treatment. According to the manufacturing method, the process is simple, machining difficulty can be lowered, machining efficiency can be improved, the application range is wide, and the manufactured metal shell of the electronic product has both the advantages of metal materials and the advantages of plastic materials and effectively overcomes the defects of the metal materials and the defects of the plastic materials; the manufactured metal shell of the electronic product has the advantages of being low in weight, high in strength, good in electrical performance and good in heat-conducting property.