Many people do not know that cameras are used in some high-tech magnetic products, this magnetic material is called NdFeB magnetic material. The application of the NdFeB magnet in the camera industry is very important, VCM, mobile phones, and other electronic products are the main application market of NdFeB. The TDK, for example, requires nearly 4,000 tons of NdFeB a year. As the world's largest mobile phone production base, domestic mobile phone demand for high-performance NdFeB is also on the rise. In 2011, the domestic production of mobile phones was 998 million units, corresponding to the demand for high-performance NdFeB permanent magnet materials of about 2,500 tons. Consumer electronics demand for high-performance NdFeB permanent magnets, including DVD players and CD-ROM drives, exceeds 1,500 tons a year.

Chemical analysis of sintered NdFeB magnet on RE2Fe14B inter-metallic compound material, the main composition is NdFeB magnet (rare earth), (iron)(ii), of which thulium (ND), to obtain a different performance, rather than from thulium (DY) can (PR) and other metals, can replace iron.