... size(um)is 2 Specific surface area(m 2 / g)is 2 Bulk density(g / cm 3) is 3.2 Polymorphs is Spherical ... alloys, electrode materials, microelectronics, thin films, sintering aids, protective coating, gas sensor electrodes. Widely used to manufacture high-performance tungsten products and ... heavy alloy, alloy steel, drill, anvil and other products; 2 High activity of micro-tungsten powder can be used as ...