... Rodssizes:3mm+Purity: 99.95%ISO9001: 2000Baoji Bangde Special Metals Co., Ltd holds Tantalum ,Niobium as the dominant products ... metal new materials, including many sorts and grades of their metals, sheet, tube, wire ,rod ,crucible , target ,alloy and ... , good resistance to corrosion , high dielectric constant ,in surface oxide film .widely used in many industries such as electronics ,metallurgy ...