Compared with ordinary tungsten wires, tungsten wires for photovoltaics have better comprehensive properties, such as higher tensile strength and better impact toughness, so they are more suitable as busbars (substrates) of diamond wires, which can effectively reduce the Disconnection rate, in order to improve the efficiency of silicon wafer production enterprises and save production costs.
From a chemical point of view, the factors affecting the performance of tungsten wire for photovoltaics include not only the quality and ratio of raw materials but also the production process and process parameters. The production process of tungsten wire is a complex and difficult process. The whole process must be strictly controlled to ensure the physical and chemical properties of the finished tungsten wire by controlling the appropriate chemical composition.
The production steps of doped tungsten wire: the raw material ammonium paratungstate (APT) is reduced by hydrogen, then doped with lanthanum, then reduced again, after pickling and impurity removal to obtain high-purity tungsten-lanthanum powder; the tungsten-lanthanum powder is subjected to isostatic The semi-finished product is obtained by pressing and forming, and then pre-sintered and vertically sintered; then the vertically sintered product is subjected to rotary forging and continuous rotary forging or forging, followed by electrolytic cleaning, followed by high-frequency annealing and welding; finally, continuous Rotary forging, wire drawing, packaging.
The production process of doped tungsten wire is ammonium paratungstate → primary reduction → doping → secondary reduction → pickling → mixing → isostatic pressing → pre-sintering → hammer melting → swaging blanking → continuous swaging or forging → electrolysis Cleaning→high frequency annealing→welding→continuous swaging→wire drawing→inspection→storage→recycling.
From the point of view of the production process, the equipment involved in the production of doped tungsten wire mainly includes APT calcination equipment, APT reduction equipment, isostatic press, sintering furnace, rotary hammer forging machine, intermediate frequency sintering furnace, tungsten wire drawing machine and Inspection and testing equipment for each link.
The production process of high-purity tungsten wire and high-temperature-resistant tungsten wire produced by Baoji Yusheng Metal Technology Co., Ltd. is basically the same. High-temperature-resistant tungsten wire is now commonly used in the production and assembly of various electric light sources and other industries. Wire suppliers can provide you with various specifications of tungsten wire products, you are welcome to inquire for more product information!
