Like molybdenum plate, molybdenum rod and molybdenum wire, molybdenum foil is also a typical molybdenum product with 0.025mm to 0.09mm thickness and 30-100mm width. Its purity is more than 99.95% and surface is very bright.
In terms of physical and chemical properties, this metal foil is a silver-gray metal flake with metallic luster, with a melting point of about 2620℃, a boiling point of about 5560℃, a relative density of 10.2g/cm3, high hardness and low thermal expansion coefficient, high thermal conductivity, small resistivity, good chemical stability and electrochemical properties. Under normal temperature and pressure, it will not react with air or water, but under heating conditions, it will be slowly oxidized.
Regarding production method, the preparation steps are as follows: firstly, using medium particle molybdenum powder as raw material, obtaining molybdenum compact by cold isostatic pressing, and then go through compound sintering, low temperature large deformation blanking, low temperature cross hot rolling, Alkali washing, grinding and shearing, then warm rolling, hydrogen annealing, surface cleaning and shearing, cross cold rolling, surface degreasing, and finally vacuum stress relief annealing and cutting inspection to obtain the desired products.
About the applications, Mo foil is widely used in the production of interconnect lines and composite grids of electronic devices, reflective screens and cover plates in sapphire crystal growth furnaces, heating belts and connectors in vacuum furnaces, and sputtering for plasma coating, targets, high temperature boats and other products.
The national standard of molybdenum foil: GB/T 3877-2006 replaced GB/T 3877-1983. The main changes in GB/T 3877-2006 are as follows: pure molybdenum grade Mo2 and rare earth element-added molybdenum alloy grade MoLa are added, and chemical composition requirements are supplemented; The thickness range of the foil is expanded, and the thickness is consistent with the stipulations of ASTM B386-03; the width range of the foil is expanded, and the allowable dimensional deviation is appropriately supplemented and adjusted; the supply status of annealing (m) is added; ASTM B386-03 is quoted The relevant indexes of ASTM B386-03 supplement the mechanical performance requirements of Mol grade products; the relevant indexes of ASTM B386-03 are cited to supplement the process performance requirements; the softening temperature of the annealed state is recommended.
