Finally, A Neodymium Magnet Defeats The Hydraulic Press

Hydraulic press has destroyed things, there is no compassion, but this huge neodymium magnet is actually a big brute force.

Neodymium magnets, also called rare earth magnets, are made of alloys of bismuth, boron and iron. They are currently the strongest magnets - it is said that it is impossible to remove a small discoid neodymium magnet from the refrigerator by hand. If they are gathered with sufficient power, these magnets will even break. Today, from MRI equipment to speakers and mobile phones, it is widely used in various technologies.

In manufacturing, the most important innovation of loudspeaker is the use of neodymium magnet. Currently, neodymium magnets are the strongest permanent magnets known to man. For this reason, the neodymium magnet has a very high ability to generate a strong magnetic field in the air gap, greatly contributing to the manufacture of compact and lightweight devices and the improvement of speaker performance. Neodymium magnet is an alloy of niobium, iron and boron forming the molecule Nd 2 Fe 14 B. The molecular structure of the molecule is the tetragonal crystal structure. Important properties of the magnet are the strength of the magnetic field, the resistance of the material to degaussing, the magnetic energy density, and the temperature at which the material loses its magnetism. In addition to losing magnetism at low temperatures, neodymium magnets have all these high performance values ​​over other magnetic materials.

Rare earth magnets are usually made of tantalum or samarium cobalt and are rated for strength and performance under relatively harsh conditions. Cockroaches are actually stronger of the two types, but they can not tolerate extreme heat. The maximum operating temperature of the neodymium magnet is usually 125 to 150 ° C, and the Curie temperature is 310 to 400 ° C. These magnets have characteristics similar to those of ceramic magnets. This is because the flexible magnet is a laminated mixture of the ceramic powder and the flexible binder. However, flexible magnets are less reliable at higher temperatures than ceramic magnets, as the bonding material becomes unstable at about 100 degrees Celsius.