A method for preparing small particle single crystal magnetic material with controllable crystal orientation by using focused ion beam combined with magnetic field orientation
By combining focused ion beams with magnetic field orientation, small single crystal particles of rare earth permanent magnet materials were prepared, solving the problems of long preparation cycles and difficulty in crystal orientation control in existing technologies. This method enables efficient and precise crystal orientation control and the preparation of rare earth permanent magnet materials with excellent magnetic properties.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- DONGHUA UNIV
- Filing Date
- 2026-02-12
- Publication Date
- 2026-06-30
AI Technical Summary
Existing rare earth permanent magnet material preparation processes have drawbacks such as long preparation cycles, difficulty in controlling crystal orientation, difficulty in obtaining small-sized single crystals, and complex or high-energy consumption processes. In particular, it is difficult to achieve efficient and precise control in the preparation of nanoscale single crystal particles.
By employing a focused ion beam combined with magnetic field orientation, Sm-Fe-N matrix material is pre-oriented in an external magnetic field, and small single crystal particles are precisely milled using a focused ion beam system. The orientation state is then fixed by epoxy resin or low-temperature hot pressing, thus achieving controllable crystal orientation.
It significantly improves the preparation efficiency of single crystal particles of rare earth permanent magnet materials, greatly shortens the cycle, allows for controllable crystal orientation and height, ensures consistent batches, precisely controls particle size, produces excellent magnetic properties, and features a simple and environmentally friendly process.
Smart Images
Figure CN122304032A_ABST