7results about How to "Good resistance stability" patented technology

The invention belongs to the technical field of precision resistors, and particularly relates to a precision resistor alloy foil and a preparation method thereof. Aiming at the defect that the performance of the existing precise resistance alloy foil has a space for improving, the invention adopts the following technical scheme: the precise resistance alloy foil comprises the following elements in percentage by mass: 20.4-20.8% of Cr, 2.4-2.8% of Al, 1-2% of Fe, 6.5-7.0% of W, 4.2-4.7% of Ti, 3.5-3.9% of Zr, 0.2-0.6% of Ce and the balance of Ni. The preparation method comprises the following steps: preparing raw materials; smelting and casting to obtain as-cast alloy; carrying out three-way free forging after homogenizing annealing treatment; carrying out five-pass hot rolling; aging treatment is carried out after solution treatment; performing three-pass cold rolling treatment; aging treatment is carried out after solution treatment; and carrying out annealing treatment. The precision resistance alloy foil prepared by the invention has higher resistivity, lower resistance temperature coefficient and better resistance stability.

The invention provides a flexible conductive composite material and a preparation method and application thereof, and belongs to the technical field of high polymer materials, and the preparation method comprises the following steps: mixing graphene, carbon nanotubes and a polar organic solvent to obtain a nano carbon material dispersion liquid; mixing raw silicone rubber, a silane coupling agent and the nano carbon material dispersion liquid, and carrying out surface modification treatment to obtain a nano carbon modified raw rubber mixed liquid; and mixing the nanocarbon modified raw rubber mixed solution with a cross-linking agent, and carrying out a cross-linking reaction to obtain the flexible conductive composite material. The prepared flexible conductive composite material has a low seepage threshold value and high mechanical performance, and after the flexible conductive composite material serves as a sensing layer of the flexible piezoresistive sensor, the flexible piezoresistive sensor can have a large measuring range and high sensitivity and repeated loading capacity.

The invention relates to a method for preparing a fluorine-doped tin oxide transparent conductive film through ultrasonic atomization and application of the fluorine-doped tin oxide transparent conductive film, adopted fluorine-doped tin oxide transparent conductive film spraying liquid comprises the following components: a tin source, alcohol, a fluorine-containing dopant and lithium hydroxide, and the pH value of the spraying liquid is 2.0 or above. Therefore, the acidity is lower than that of the traditional film, the microdefect of the film layer can be improved, the surface roughness of the film is reduced, the gas adsorption capacity of the film layer is reduced, and the film resistor stability is improved. According to the preparation method, the combination of trifluoroacetic acid and lithium hydroxide is innovatively adopted, the acidity is reduced and controllable, the film forming thickness is controllable, the fluorine doping level is high, the problems of film growth and corrosion of coating equipment can be well solved, and conditions are provided for preparation of a high-quality FTO film.

The invention discloses a flexible electrode, a preparation method thereof and a flexible electrode material comprising the flexible electrode, the flexible electrode comprises an electrode layer, the electrode layer is embedded on an elastomer, the electrode layer is in a vertically and horizontally interlaced line grid on a vertical projection, and the electrode layer is in a concave-convex wavy line on the vertical projection; the coating is prepared through the processes of spin coating, embossing and spraying. The flexible electrode disclosed by the invention is simple in structure, simple and easy in preparation operation steps, good in compatibility and fitness and stable in conductivity.

This application relates to the field of functional paste technology, specifically disclosing an aqueous conductive silver paste comprising the following components: 50-60% silver-coated copper powder, 0.5-1% sodium polyacrylate, 1.5-3% sodium carboxymethyl cellulose, 0.5-1.5% polyvinyl alcohol, 0.3-2.0% co-povidone, 0.5-4.0% fumed silica, 0.2-2.0% surfactant, 0.6-1.4% co-solvent, and the balance being 0.08-0.12M sodium dihydrogen phosphate / disodium hydrogen phosphate buffer; the silver content in the silver-coated copper powder is 25-35%; furthermore, the aqueous conductive silver paste may also contain one or more conductive filler additives, namely carbon nanotubes and silver-plated glass microspheres, at a content of 1-4%. The aqueous conductive silver paste provided by this application has advantages such as low cost, good environmental friendliness, low drying temperature, and stable performance, and has good application prospects.

The application discloses a high-stability resistance paste and a preparation method thereof, and relates to the technical field of resistance paste, and comprises the following raw materials in parts by weight: 65-75 parts of a conductive phase, 30-35 parts of an organic carrier, 15-20 parts of a glass bonding phase and 2.5-3.5 parts of modified aluminum nitride. The modified aluminum nitride used in the application enhances the bonding strength of the glass bonding phase, avoids the decrease of the stability of the resistance paste conductor phase, and improves the resistance value stability of the resistance paste after multiple sintering.

The invention belongs to the technical field of conductive paste for automobile glass, and relates to acid-resistant antioxidant silver paste for automobile glass and a preparation method of the acid-resistant antioxidant silver paste. The silver paste comprises the following raw materials: 50-70 parts of metal silver powder, 5-15 parts of lead-free glass powder, 0.5-5 parts of rare earth salt, 2-10 parts of polymer resin, 1-3 parts of an organic additive and 10-30 parts of an organic solvent. The preparation method comprises the following steps: modifying rare earth salt by a silane coupling agent to obtain modified rare earth salt; dissolving polymer resin in an organic solvent to obtain a carrier; and adding the metal silver powder, the lead-free glass powder, the organic additive and the modified rare earth salt into the carrier, and sequentially performing stirring, grinding and vacuum defoaming treatment to obtain the acid-resistant antioxidant silver paste. The automobile rear windshield demisting heating wire is suitable for automobile rear windshield demisting heating wires, and the high-reliability welding requirement can be met.