Niobium target material is mainly used in optical coating, surface engineering coating and coating industries such as heat and corrosion resistance and high conductivity.

In the field of optical coating, it is mainly used in ophthalmic optical products, lenses, precision optics, large-area coating and 3D coating. Niobium target is usually called naked target. First, it is welded with copper back target, then sputtering is carried out, and niobium atoms are deposited on the substrate material in the form of oxide to achieve sputtering coating.

With the development of technology and application of niobium target, the requirements for the microstructure uniformity of niobium target are improved, mainly in three aspects: grain size refinement, no obvious texture orientation, and improved chemical purity. At the same time, the uniform microstructure performance distribution of the target is required, which is crucial to ensure the sputtering performance of niobium target.