Rare earth magnets are the strongest type of permanent magnets manufactured and are integral to the high-tech industry, especially in clean energies, like wind turbine generators and electric vehicle motors. China extracts and produces over 95% of the world’s rare earth minerals, moreover has cut its exports since the year 2010. In addition to the supply chain concerns, the extraction process is extremely destroying the environment.
Which magnet is stronger than the neodymium magnet?
In the over 10 years, a lot of experimental work has been done on Iron and Nitrogen in order to combine for manufacturing a much stronger iron nitride magnet. In the beginning, experiments produced only thin films or powders which were not appropriate and suitable for many applications. But, when the fabrication process was employed and it produced the magnet in the bulk form that can be used in a number of applications. Moreover fabrication process in very compatible with the existing mass-production techniques. Nitrogen and iron inputs are comparatively low cost, hence enabling extremely cheap permanent magnets which exceed the performance of the rare earth magnets.
Benefits and features of Iron Nitride Permanent Magnet
1. does not need any rare-earth inputs. It uses low-cost and common nitrogen and iron inputs.
2. environmentally friendly.
3. compatible with mass production techniques.
4. Will be used in many high-tech applications that include electronics, wind turbines, and electric motors.
5. The theoretical limit of the magnetic properties of iron nitride permanent magnet is more than the twice, maximum reported magnetic energy of the rare earth magnet.
Where to buy Iron Nitride Permanent Magnet?
We guess no one can supply Iron Nitride Permanent Magnet now, even the powder. Because the technology is still not mature yet.
The current issues are:
(1) inventing the mass-production technology of iron nitride powder;
(2) reducing the interface defects and dimensional deviation of iron nitride powder;
(3) replacing part of Fe and N with other elements. Improve the coercivity;
(4) Establish the technology to align and solidify the nanometer-sized iron nitride powder;
(5) Establish the improvement of Fe[sub]16[/sub]N[sub]2[/sub] below 200℃ Filling rate alignment and curing technology (Fe[sub]16[/sub]N[sub]2[/sub] will be thermally decomposed once it exceeds 200℃)
Even the powder, not too many countries have the capacity to produce it. Not to mention the mass production of finished magnets.
And China manufacturers just focus on big neodymium magnets and High-grade neodymium magnets.