Application of NdFeB magnet in MRI

Neodymium iron boron magnets, as a result of the development of rare earth permanent magnet materials, are called "magnet kings" due to their excellent magnetic properties. Neodymium neodymium iron boron magnets are alloys of neodymium and iron oxide. Also known as magnet. NdFeB magnets have extremely high magnetic energy product and coercive force, and at the same time, the advantages of high energy density make NdFeB permanent magnet materials widely used in modern industry and electronic technology, thus making instrumentation, electroacoustic motors, magnetic separation It is possible to reduce the size, weight, and thickness of equipment such as magnetization.

The advantages of neodymium iron boron magnets are high cost performance and good mechanical properties; the shortcomings are that the Curie temperature is low, the temperature characteristics are poor, and they are easy to pulverize and corrode. They must be made by adjusting their chemical composition and adopting surface treatment methods. Improvements can meet the requirements of practical applications.

 The advantages of neodymium iron boron magnets:

 1. NdFeB magnets have high precision: one molding can meet the precision requirements without excessive post-processing.

 2. The NdFeB magnet has excellent magnetic properties: the magnetic energy product is three times that of the heterogeneous ferrite, and the intrinsic coercive force is high, and the mass production has stable magnetic properties and good consistency.

 3. Good temperature stability: working temperature can reach 150℃.

 4. Good corrosion resistance and good surface quality: The surface of the product has epoxy resin coating and Parylene coating, good corrosion resistance, smooth and beautiful surface, no blistering, cracking, peeling, flashing, falling particles, etc.

 Traditional applications of neodymium iron boron magnets (speakers, electors, permanent motors, VCM, MRI, etc.) have a high market penetration rate, and demand is in a period of steady growth, with an annual growth rate of 5%-10%; while new applications (wind power, inverter air conditioners, etc.) , Energy-saving elevators, hybrid vehicles, automobile EPS steering motors) are the main driving force for the development of the neodymium iron boron magnet industry.

 The cost-effectiveness of the current MRI machine is a high-tech diagnostic instrument that is more precise than CT. The nuclei of various elements of human cells have nuclear magnetic moments, and resonance will occur under a strong magnetic field. Because normal human cell tissues and diseased cell tissues resonate at different times, the image data in them is analyzed through precise scanning to reflect the early stage. Minor lesions. But the device needs to be supported by a powerful magnetic field system. Superconducting magnets need to be equipped with relatively expensive ultra-low temperature systems, which are complicated to install and maintain; ordinary ferrite magnets require hundreds of tons of magnets to assemble, which is very large and bulky. If you use the magnet king --- neodymium iron boron magnets, it will not be said to be big and bulky. Two tons of magnets can be completed. Compared with one hundred tons and three tons, the volume must be much smaller, ensuring the same cost performance. In the case of small and lightweight.