8results about How to "Stable resistivity" patented technology

The utility model discloses a kind of electrically conductive liquid processing devices, it is related to electrically conductive material processing equipment field, to solve the problem of existing device stirring dead angle, particle is easy to agglomerate, poor integration. The device includes rack, rack lower end fixed main tank body, left side of top is equipped with lifting mechanism, lifting mechanism lower end is connected with stirring mechanism and is penetrated to main tank body, right side of top is equipped with premixing mechanism;Lifting mechanism contains connecting sheet metal support, stirring motor fixed seat, reversing motor, lifting screw and sliding drive block, support outside is equipped with guide rail, fixed seat inside is equipped with auxiliary roller;Stirring mechanism contains connecting frame, stirring motor, stirring shaft and three-layer spiral stirring blade;Premixing mechanism contains premix tank body and two groups of pumping pipeline, premix tank body bottom is conical and is connected with main tank body by pipeline. The device can accurately adjust stirring depth, realize raw material premixing and depth dispersion, improve electrically conductive liquid mixing uniformity and processing efficiency, convenient operation, adapt to scale electrically conductive liquid production.

The hot-rolled wire rod for the blasting lead comprises the following chemical components in percentage by mass: 0.03 to 0.06 percent of C, less than or equal to 0.030 percent of Si, 0.20 to 0.30 percent of Mn, less than or equal to 0.020 percent of P, less than or equal to 0.020 percent of S, less than or equal to 0.100 percent of Cr, less than or equal to 0.100 percent of Ni, less than or equal to 0.100 percent of Cu, less than or equal to 0.0070 percent of N and the balance of iron and other inevitable impurities. The invention further relates to a production method of the hot-rolled wire rod for the blasting lead, the production method comprises a smelting process and a rolling process, and the smelting process comprises the steps of KR desulfurization and slagging-off, converter smelting, LF refining and continuous casting. The steel wire rod for the blasting lead produced through the production method is good in mechanical property, the customer drawing machining process performance is excellent and stable, and the manufactured 0.55 mm blasting lead is good in resistivity and conductivity.

The invention provides a low-resistance temperature coefficient precision resistance alloy and a preparation method thereof. The alloy comprises the following components: less than or equal to 0.04% of C, 1.30%-1.50% of Si, 0.30%-0.55% of Mn, less than or equal to 0.010% of S, less than or equal to 0.010% of P, 19.70%-20.50% of Cr, 3.40%-3.70% of Al, 0.60%-1.0% of Fe and the balance of Ni and inevitable impurities. The alloy has a low resistance temperature coefficient and is widely applied to the fields of aviation, aerospace and high-end instruments and meters. The manufacturing method comprises the steps that smelting is conducted in a vacuum induction furnace, a steel ingot is obtained through casting and vacuum consumable remelting, and then heating, forging and heat treatment are conducted on the steel ingot. In the smelting process, the alloy components are ensured to be accurate by controlling the pressure in the furnace, the oxygen and nitrogen content and the smelting time. And during forging, the temperature is slowly increased to 1050-1060 DEG C, heat preservation is conducted for 2-3 hours, and finally forging is conducted to the needed form. And finally, carrying out heat treatment to improve the mechanical property and the resistance temperature coefficient stability of the material. The manufacturing method can effectively improve the alloy performance, is suitable for production of precision resistor elements, and has a wide market prospect.

The invention relates to a cleaning method for high-purity electrolytic copper, which comprises the following steps: sequentially carrying out pretreatment, first acid pickling, first water washing, second acid pickling, second water washing, third acid pickling, third water washing, rinsing and drying on a to-be-cleaned high-purity electrolytic copper plate to obtain the high-purity electrolytic copper, wherein the pretreatment comprises sand blasting treatment and cleaning which are carried out in sequence. According to the method, part of impurities obviously existing on the surface of the high-purity electrolytic copper plate to be cleaned are removed through sand blasting treatment, then trace impurities in residual black spots, yellow traces and microcracks are removed layer by layer in a cleaning mode of pickling and washing alternate treatment, new impurities cannot be introduced in the process, and the use requirement of high-purity copper can be met; meanwhile, the cleaned acid solution can be reused, and pollution between the acid solutions is avoided; the one-time cleaning qualification rate is high, the purity and the resistivity before cleaning are still kept stable and are not obviously increased, and the storage retention period reaches more than 6 months.

This invention discloses a method for preparing conductive ceramics, the resulting products, and their applications. The invention uses alumina powder, coal gangue powder, fly ash powder, and organic carbon source as matrix raw materials, and polyvinyl alcohol as a binder, employing a rapid hot-pressing, high-temperature sintering, carbothermal reduction process to prepare conductive ceramics. This invention features a simple process, low cost, low energy consumption, high production efficiency, and good environmental performance, making it easy for industrial production. The resulting conductive ceramics exhibit high mechanical properties, good conductivity, and low resistance, making them a preferred material for indoor heaters, electromagnetic shielding devices, high-temperature sensors, aerospace thermal protection systems, and aero-engine applications.

The application discloses a conductive silver paste for photovoltaic cells and a preparation method thereof. The conductive silver paste comprises the following raw materials in percentage: 65-85% of silver powder and 1-3% of modified binder, and the rest is an organic carrier. In the printing process of the conductive silver paste, the substances in the organic carrier contact the silver powder, so that the silver chelate in the organic carrier is fully contacted, and then a stable conductive path can be formed during baking. The modified binder is a lead-free glass formed by taking bismuth trioxide as a main raw material to form a bismuth-based glass. The addition of calcium fluoride in the raw material can reduce the water absorption of the bismuth-based glass, thereby ensuring the stability of the resistivity. The addition of titanium dioxide can exist in a quadruple coordination form, so that the Si-O-Si bond in the glass is changed into a Si-O-Ti bond, thereby forming an interconnected tetrahedral structure, increasing the network connectivity of the glass, and simultaneously increasing the antireflection effect of the glass and the utilization rate of light energy.

The invention discloses a carbon dioxide mixer for removing static electricity, which comprises a gas-water mixing membrane device, a water inlet pipeline, a water outlet pipeline, a gas inlet pipeline and a gas exhaust pipeline, the gas-water mixing membrane device mixes carbon dioxide into ultrapure water to generate carbon dioxide mixed water, and the gas exhaust pipeline is provided with a speed control valve. And the exhaust pipeline is also provided with a pneumatic diaphragm valve which is connected in parallel with the speed control valve and is opened and closed at a set frequency gap. According to the invention, the pneumatic diaphragm valve connected in parallel with the speed control valve is arranged on the exhaust pipeline to dynamically adjust the emission of the undissolved carbon dioxide gas, so that the stability of the resistivity of the generated carbon dioxide mixed water is ensured.

The invention discloses a copper and copper alloy part surface anti-corrosion process and application thereof.The process comprises a series of refined surface treatment steps including surface degreasing and cleaning, electrochemical environment-friendly complexing blunt conversion to form a film, and electrical contact surface photochemical film fixing anti-corrosion protection. And a chemically-bonded polymerization-induced blunt complex conversion film protection layer is generated on the surfaces of copper and copper alloy. Compared with an existing copper material protection technology, the protective film layer can effectively isolate an atmosphere corrosion medium from being in contact with a metal matrix, and therefore the corrosion resistance of the part is remarkably improved. The weather-resistant and corrosion-resistant coating is especially suitable for high-humidity and heavy-pollution atmospheric working condition environmental sections, shows more excellent weather-resistant and corrosion-resistant performance, and meets the corrosion-resistant protection requirements of special environmental sections such as coastal areas, islands and industrial heavy-pollution areas on parts of high-speed rails and rail transit overhead line systems. And the safety accident risk in the high-speed rail and the rail transit overhead line system caused by environmental corrosion factors is reduced.