12 results about "High conductivity" patented technology

The invention discloses a highly conductive heat-resistant aluminum conductor and a production process thereof. The highly conductive heat-resistant aluminum conductor is characterized by comprising a bearing core wire and an electric conductor, wherein the bearing core wire is a steel strand fabricated by stranding a plurality of high-strength or ultrahigh-strength steel wires with the tensile strength being equal to or larger than 1560 MPa, the electric conductor is fabricated by stranding highly conductive heat-resistant aluminum round wires and aluminum mold lines with the conductivity being higher than 62 percent IACS (International Annealed Copper Standard) on the periphery of the core wire, the bearing steel core wire is subjected to prestress treatment and has low creep rate and ultrahigh strength, and the electric conductor is subjected to heat treatment at the temperature of not more than 400 DEG C so as to resist heat and enable the strength remaining rate to be higher than 95 percent after being heated at the temperature of 150 DEG C for 1 hour. As a power transmission line, the highly conductive heat-resistant aluminum conductor disclosed by the invention can run at a high temperature of 150 DEG C for a long time, has excellent and high conductivity and good sag property, is applicable to capacitance expansion of newly built transmission lines and old transmission lines, and has the remarkable advantages of high conductivity, heat resistance, good sag property, less loss of transmission lines, smoothness of surface, and high resistance to wind, vibration, freezing, rain and snow.

The invention discloses a preparation method for an Nb-Zr alloy/Cu multi-core composite wire. The preparation method includes the following steps that firstly, Nb and Zr are melted to be cast into an Nb-Zr alloy cast ingot; secondly, hot extrusion is conducted, and an Nb-Zr alloy bar is obtained; thirdly, drawing is conducted, and an Nb-Zr alloy wire is obtained; fourthly, pretreatment is conducted; fifthly, primary compounding is conducted, and a pretreated Nb-Zr alloy/Cu primary composite wire is obtained; and sixthly, secondary compounding is conducted, and the Nb-Zr alloy/Cu multi-core composite wire is obtained. By means of the preparation method, due to electric arc melting and with the combination of a bundle drawing technology, preparation of the multi-core composite wire where core wires are evenly distributed and the organization structure is stable is successfully achieved; and the wire prepared through the method has high strength and high conductivity and also has good oxidation resisting capability and excellent corrosion resisting capability.

The invention discloses a preparation method of a flexible electrode membrane based on polyacrylamide hydrogel. The preparation method comprises the following steps: 1) weighing the following raw materials: polyacrylamide powder, sodium chloride powder and water according to corresponding mass percentages; 2) dissolving the sodium chloride powder in water to obtain a sodium chloride solution, adding the polyacrylamide powder, and performing stirring until a gel-like flexible gel is formed; and 3) standing the flexible gel in step 2) at normal temperature, and stretching the flexible gel untilcomplete transparence to obtain the flexible electrode membrane based on the polyacrylamide hydrogel. The preparation method has the advantages of high efficiency, low preparation cost, environmentalprotection, safety, good stability, and high conductivity of the prepared flexible electrode membrane.

A high-strength high-conductivity rare earth copper-magnesium alloy contact wire comprises, by weight percentage, 0.1-0.8% of magnesium, 0.1-0.4% of nickel, 0.1-0.4% of zinc, 0.1-0.4% of silver, 0.05-0.15% of a rare earth element and the balance copper and inevitable impurity elements, wherein the rear element is one or two of cerium and neodymium. When the rare earth element is added in the form that the cerium and neodymium are mixed, the weight ratio of the cerium and neodymium is 1:1-1:2. The high-strength high-conductivity rare earth copper-magnesium alloy contact wire overcomes the technical defect that the requirements on electrical conductivity and the tensile strength of a copper-magnesium alloy cannot be met at the same time in the prior art and can meet the performance requirement of the copper alloy for the railway contact wire.

The invention discloses an electrochemical device and a diaphragm thereof. The diaphragm of the electrochemical device includes a base film and coatings formed on both side surfaces of the base film,wherein the coatings comprise a ceramic coating and a thermal bonding coating, the ceramic coating and the thermal bonding coating which are formed on same sides of the base film do not coincide, andthe thermal bonding coating formed on one side of the base film does not coincide with projection of the thermal bonding coating formed on the other side of the base film on the base film. The diaphragm is advantaged in that after the diaphragm and an electrode plate are subjected to hot pressing, the electrode can be effectively fixed, so production efficiency of a laminated battery core preparation process is improved, moreover, the diaphragm further has advantages of low air permeability value, high conductivity, simple production process and the like.

The invention relates to the application field of a graphene material, particularly relates to a graphene reinforcing glass fiber, and especially relates to a graphene reinforcing glass fiber for a pantograph slide plate and a preparation method of the graphene reinforcing glass. The graphene reinforcing glass is characterized in that graphene is embedded in a surface micro-crack of a glass fiber in radial direction; metal powder is melted at top speed through high-energy laser beam or electronic beam scanning, so that graphene is firmly welded with a releasing glass fiber; thus the graphene is not easy to isolate from the glass fiber, and the reinforcing effect of the graphene can be displayed for a long time. The graphene reinforcing glass fiber is an ideal pantograph slide plate material for its high strength, high flexibility, high modulus, high-wearing feature, high conductivity, antiwear property, acid-base resistance property, light weight, and other properties.

The invention discloses a preparation method of a high-strength and high-conductivity copper alloy load switch knife, which is characterized by comprising the following steps: S1, proportioning raw materials; s2, electromagnetic stirring and vacuum melting; s3, casting is conducted; s4, hot extrusion; s5, solid solution treatment; s6, carrying out primary cold drawing; s7, aging treatment; s8, carrying out secondary cold drawing; s9, blanking and punching are carried out; s10, machining is carried out; and S11, surface treatment. The copper alloy load switch tool prepared by the method has the properties of high conductivity, high strength, high temperature resistance and the like; in addition, the preparation method of the copper alloy load switch knife is low in cost and suitable for industrial production.

A high pressure dynamic micro differential pressure gauge, and methods for using and checking the same. The high pressure dynamic micro differential pressure gauge comprises a set of vertical manometer tubes in communication with each other, where one or more manometer tubes are connected to a resistance meter through signal lines, and the resistance meter is connected to a data collection and processing control system. Each manometer tube is full of low conductivity buffer liquid and high conductivity manometric liquid. The resistance meter is configured to measure resistances in the one or more manometer tubes, and the data collection and processing control system is configured to convert the resistances measured by the resistance meter into a differential pressure.