NdFeB magnet is widely used in microwave communication technology, including radar technology, satellite communication, remote control, and telemetry technology, electronic tracking, electronic countermeasures technology. In addition, neodymium permanent magnets are also used in the magnetron, magnetron traveling wave tube, cathode ray tube, and circulator. NdFeB magnets, mainly made from Neodymium, Iron, Boron, has earned reputation