What is the performance curve of a powerful magnet? The value of the reverse magnetic field strength required to reduce the magnetic induction to zero is called magnetic induction coercivity . However, the magnetization of the magnet is not zero at this time, but the reverse magnetic field counteracts the magnetization of the magnet. If the external magnetic field is removed, the magnet still has certain magnetic properties. The coercivity of NdFeB is generally more than 11000oe.
When a magnet is magnetized by an external magnetic field in a closed-circuit environment until the technology is saturated, the magnetic induction strength of the magnet is called remanence. It represents the large magnetic flux that a magnet can provide. It can be seen from the demagnetization curve that it corresponds to the case when the air gap is zero, so the magnetic induction intensity of the magnet in the actual magnetic circuit is less than the remanence. NdFeB is a kind of practical permanent magnet material with high br content.
The strength of the reverse magnetic field required for a strong magnet to reduce its magnetization to zero is called intrinsic coercivity. The intrinsic coercivity is a physical quantity to measure the demagnetization resistance of a magnet. If the applied magnetic field is equal to the intrinsic coercivity of the magnet, the magnetism of the magnet will be basically eliminated. The Hcj of NdFeB decreases with the increase of temperature, so the brand of high Hcj should be selected when working in high temperature environment。
AISEN MAGNETS focused on development and manufacturing of Neodymium magnet, has more than 10 years manufacturing experience in producing various sizes, different shape and surface coating. Over 45 different grades of neodymium magnet (strong magnet) widely used in many industry.
Our Production line including vacuum melting, Jet mill, Isostatic press, vacuum sintering, machining and magnetization. Our annual design output is 1000tons, currently output is 800tons. Our experienced engineers work closely with customer to find out the best possible solutions to meet your requirements.
