All of the Tantalum/Niobium/Tungsten/Molybdenum series products are widely used in many important areas such as aviation, spaceflight, meltallurgy, petroleum,chemical and medical industry, electronics and energy. 3N5 high purity, Niobium is widely used to produce crucibles and other parts for crystal growth and rare-earth melting with its high temperture resistance, low pollution and other good characteristics.