Molybdenum foil
Molybdenum has been widely used in aerospace and electronic packaging because of its good high temperature strength, electrical conductivity and low thermal expansion coefficient. However, because molybdenum is a metal with an extremely inert surface, it is difficult to compound with other metals, which has caused a certain degree of restriction on the application of molybdenum materials. Nanoporous metals have a wide range of application prospects because of their nanoscale pore size, large specific surface area and unique physical, chemical and mechanical properties, such as high strength, high chemical activity and electromagnetic properties, and have been used in catalysis, gas sensing and energy and other fields. Therefore, the preparation of nano-porous metal layer on the surface of molybdenum will improve the surface activity of molybdenum. At present, the main methods for preparing nanoporous metals include dealloying, template, oblique incident deposition and sintering of metal powder.
The higher the water content, the denser the surface oxide layer, the denser the surface of the annealed molybdenum foil, and the lower the water content will result in less surface oxide formation, which can not form a nanoporous structure. The higher the molar concentration of ammonium fluoride (NH4F), the more obvious the "erosion" effect of the surface oxide layer, and the obtained nanoporous structure is more uniform, but too high will cause a large number of cracks, so the selection of appropriate process parameters for the preparation of nanoporous molybdenum foils is of great significance.
We can produce molybdenum sheet, molybdenum foil, molybdenum wire, molybdenum rod and molybdenum workpiece.
