192results about How to "Guaranteed conductivity" patented technology

Characters of bipolar plate of polymer based composite material are that it is produced from materials of Meta kaolin, conductance material, and solution of water glass. The conductance material is composed of graphite and carbon fiber. Doping quantity of graphite is 20-40% of mass of meta kaolin, and doping quantity of carbon fiber is 10-20%. Mass ratio between solution of water glass, meta kaolin, and conductance material 0.4-0.8:1. The said Meta kaolin is obtained by calcinating kaolin in coal series sold on market or pure kaolin at 600-850 deg.C. Modulus m of solution of water glass is equal to 2.8-3.5, and Baume degree is equal to 35-45. Features of the bipolar plate are: low cost, good corrosion resistance, high mechanical strength, light weight, good conductivity, no poison and pollution on fuel cell of proton exchange membrane.

The invention relates to a conductive screening material, in particular to a conductive low-smoke zero-halogen flame retarding and oil resisting cable sheath material and a preparation method thereof. The conductive screening material comprises the following basic components: 100 parts of ethylene-vinyl acetate rubber, 50-100 parts of magnesium hydroxide, 50-80 parts of conductive black, 10-30 parts of graphite powder, 5-10 parts of zinc borate, 10-25 parts of plasticizer, 2-5 parts of lubricant, 1-2 parts of antiager, 10-30 parts of flame retarding synergist, 2-3 parts of vulcanizer and 1-2 parts of vulcanization assistant. The preparation method comprises the four steps of material preparation, mixing, extrusion and tabletting. The conductive low-smoke zero-halogen flame retarding and oil resisting cable sheath material has the advantages of high conductivity, good oil resistivity, excellent flame retarding effect, no peculiar smell, easy stripping and high heat resistance level, and can pass the environment protection authentication of RoHS (Restriction of the use of certain Hazardous Substances Registration), REACH (Evaluation, Authorization and Restriction of Chemicals) and the like.

The invention discloses a preparation process for a high-strength high-conductivity micro copper wire. The preparation process comprises the following steps: S1, adding electrolytic copper into a smelting furnace, preserving heat and melting the electrolytic copper completely to obtain molten copper, introducing an inert gas, adding a composite refining agent, standing and slagging; S2, detecting that the molten copper comprises the following components in percentage by weight: 0.45 to 0.55 percent of Ti, 0.25 to 0.35 percent of Zr, 0.07 to 0.09 percent of Te, 0.07 to 0.09 percent of La, 0.03 to 0.05 percent of Y, 0.15 to 0.25 percent of Sn, less than or equal to 0.05 percent of Mg, and the balance of Cu; S3, enabling a crystallizer of a continuous casting machine to extend into the molten copper, and drawing upwards through a drawing roller mechanism to form an oxygen-free copper rod; S4, extruding the oxygen-free copper rod continuously and drawing repeatedly to obtain the high-strength high-conductivity micro copper wire. According to the copper wire which is prepared by the preparation process, the electric conductivity reaches over 95 percent IACS, and moreover, the tensile strength is also over 480 MPa.

The invention discloses a ferrite-based ceramic composite material as well as a preparation method and application thereof. The composite material is composed of ferrite, a carbon nanotube and a ceramic material, wherein the ferrite and the ceramic material are cladded on the tube wall of the carbon nanotube, and the ceramic material is one or several kinds of aluminum oxide, aluminum nitride, and silicon nitride. The three phases of materials, namely, the ferrite, the carbon nanotube and the ceramic, are compounded to make the advantages and disadvantages of all phases of materials complementary, so that the electrical conductance of the composite material is increased, the impedance matching performance of the composite material is improved, the wave absorption performance of the composite material is made adjustable, the structure and function integration of the ferrite-based ceramic material is realized, and thus, the application range of the composite material in the high-tech field is expanded. In addition, the powder of the composite material is prepared by adopting a coprecipitation hydrothermal method and is further prepared into a block material by adopting a microwave sintering method, and the ferrite-based ceramic composite material has the advantages that all phases are dispersed uniformly, the densification degree of the sintered material is high, the production cost is low, and the large-scale industrialization is easy to realize.

The invention provides a high-conductivity thermal-treatment type medium-strength aluminum alloy conducting filament, and belongs to the technical field of electric transmission line overhead conductors of the electric power industry. The high-conductivity thermal-treatment type medium-strength aluminum alloy conducting filament solves the technical problems that in the prior art, conductivity is low, and electric transmission line loss is high. The microstructure of alloy is adjusted by controlling the content of B, Mg, Si, Cu and other microalloying elements and adopting the thermal treatment process, and therefore the medium-strength aluminum alloy filament is developed, wherein the conductivity of the filament is not smaller than 59.2% IACS (20 DEG C), the tensile strength of the filament is not smaller than 240 MPa, and the ductility of the filament is not smaller than 4.0%.

The invention discloses a novel block anion exchange membrane. A block main chain of the anion exchange membrane contains a bending unit (biphenyl fluorene) and a twisting unit (phthalazinone); according to the structure, a non-coplanar effect can be enhanced. A preparation method of the anion exchange membrane comprises the following steps of performing polycondensation on decafluorobiphenyl (slightly excessive) and bisphenol fluorine to prepare an oligomer 1; using the decafluorobiphenyl and 4-(4-hydroxyphenyl)-2,3-phthalazine-1-one to prepare an oligomer 2; polymerizing the oligomer 1 with the oligomer 2 to obtain a polymer main chain, and performing ionization treatment, membrane casting and alkali treatment on a chloromethylation main chain to obtain the anion exchange membrane. The anion exchange membrane has better chemical stability, and higher electric conductivity and resistance to swelling, and is suitable for being applied in the aspect of alkaline fuel cells.

The invention discloses a method for preparing a fuel cell polar plate through 3D printing. The fuel cell polar plate is prepared by the following steps: (a) sequentially adding nano-alloy powder, polylactic acid, glass fibers and an emulsifying agent into a dichloromethane solvent, so as to prepare solid jelly; (b) carrying out low-temperature thermal treatment on the solid jelly under a vacuum condition, and carrying out ball milling, granulation and wiredrawing, so as to obtain a 3D printing raw material; and (c) printing the 3D printing raw material, carrying out plasma thermal treatment,so as to obtain a core-shell structure fuel cell polar plate material in which an alloy phase is packaged with modified polylactic acid. The method has the beneficial effects that the prepared fuel cell polar plate has good surface hydrophobicity, high glass transition temperature and softening temperature and good conductivity and can adequately meet the demands of fuel cells; and meanwhile, theprocess is simple, the yield and the cost are superior, and the method has potential in large-scale application.

A gas sensor is disclosed having an element holder body with which a senor element is fixedly supported, and an atmosphere-side insulator covering a base portion of the sensor element and providing electrical connection between lead wires and terminal electrodes of the sensor element. The element holder body includes a housing and an element-side insulator fixedly mounted in the housing. The atmosphere-side insulator incorporates therein a plurality of spring terminals held in electrical contact with the electrode terminals of the sensor element. At least one of the element holder body and the atmosphere-side insulator carries thereon convexed portions with which the atmosphere-side insulator can tilt with respect to the element holder body.

The invention relates to a preparation method for a graphite film. The method comprises the following steps: heating a PI film to temperature of 650-750 DEG C, keeping the temperature for 100-150 min,continuing to raise the temperature to 850-950 DEG C, keeping the temperature for 100-150 min, continuing to raise the temperature to 1250-1350 DEG C, keeping the temperature for 80-130 min, and performing cooling to obtain a carbonized film; and (2) performing graphitization: performing graphitization on the carbonized film obtained in the step (1) by adopting the following gradient heating procedure: heating the carbonized film to temperature of 1550-1650 DEG C, keeping the temperature for 20-60 min, continuing to raise the temperature to 1750-1850 DEG C, keeping the temperature for 20-90 min, continuing to raise the temperature to 2300-2400 DEG C, keeping the temperature for 20-90 min, performing heating to temperature of 2750-2900 DEG C, and performing cooling to obtain the graphite film with high orientation, high crystallinity and high conductivity.

The invention discloses a novel anion exchange membrane and a preparation method thereof. The anion exchange membrane is prepared by initial reaction of a halomethyl group-containing polymer and haloperidine and binary cross-linking with 1,4-dimethylpiperazine or the like, the benzylic position of the membrane adopts piperidine ions with excellent alkaline stability, and the chemical stability isbetter under alkaline conditions; the polycation can effectively improve the ionic conductivity; the cross-linking not only inhibits swelling, but also maintains flexibility and excellent electrical conductivity of the membrane. The anion membrane exhibits excellent chemical stability, high electrical conductivity, low water absorption and swelling resistance, and is suitable for use in the fieldof alkaline fuel cells.

The invention discloses a high-strength high-electroconductivity rare-earth and copper alloy electromagnetic wire and a preparation process thereof. The high-strength high-electroconductivity rare-earth and copper alloy electromagnetic wire is characterized in that the electromagnetic wire is composed of 1.05-1.10wt% of Ni, 0.55-0.60wt% of Zr, 0.25-0.30wt% of La, 0.25-0.30wt% of Y, smaller than or equal to 0.10wt% of Sc and the rest Cu. The high-strength high-electroconductivity rare-earth and copper alloy electromagnetic wire produced by the preparation process is high in strength and good in tensile performance, and electroconductivity is greatly improved.