Dongguan Motor Motor Magnets | NdFeB Magnets | Powerful Magnets | Kariqi Technology

ferrite magnet is a ferromagnetic metal oxide. In terms of electrical properties, the resistivity of ferrite is much greater than that of metal alloy magnetic materials, and it also has higher dielectric properties. The magnetic properties of ferrite are also reflected in its high magnetic permeability at high frequencies. Therefore, ferrite has become a widely used non-metallic magnetic material in high-frequency and weak current fields. It is a non-metallic magnetic material and is a composite oxide or ferrite of ferric oxide and one or more other metal oxides. The magnetic force is usually Gaussian and is often used in equipment such as speakers and speakers. The advantages of NdFeB magnets are high cost performance and good mechanical properties. The disadvantages are low Curie temperature point, poor temperature characteristics, and easy to pulverize and corrode. It must be improved by adjusting its chemical composition and adopting surface treatment methods. , in order to meet the requirements of practical applications. NdFeB belongs to the third generation of rare earth permanent magnet materials. It has the characteristics of small size, light weight and strong magnetism. It is the magnet with the best performance and price ratio at present and is known as the magnet king in the magnetic field. The advantages of high energy density make NdFeB permanent magnet materials widely used in modern industry and electronic technology. In the state of bare magnetism, the magnetic force can reach about Gauss.
As a third-generation rare earth permanent magnet material, NdFeB magnets have high performance and are widely used in energy, transportation, machinery, medical appliances and other industries. Especially with the development of the knowledge economy represented by information technology, it has given Functional materials such as the rare earth permanent magnet NdFeB industry continue to bring new uses, which brings broader market prospects to the NdFeB industry.
NdFeB magnets are tetragonal crystals formed from NdFeB. In 2001, Masato Sagawa of Sumitomo Special Metals discovered neodymium magnets. The magnetic energy product of this magnet is greater than that of the samarium cobalt magnet, and it is the substance with the largest magnetic energy product in the world at that time. [] Later, Sumitomo Special Metals successfully developed the powder metallurgy method and General Motors successfully developed the rotary spray melting method to prepare NdFeB magnets. [] This magnet is the most powerful permanent magnet today, and it is also the most commonly used rare earth magnet. It is widely used in electronic products, such as hard drives, mobile phones, headphones, and battery-powered tools.
In order to avoid corrosion damage, the surface of the permanent magnet material needs to be protected during use, such as electroplating with gold, nickel, zinc and tin, and spraying epoxy resin on the surface.