Magnetic material at home and abroadDesignated suppliers of famous enterprises both at home and abroad

Since the 1980s, functional materials, ecological environment materials and intelligent materials have played an increasingly important role in the modern civilization and social progress of human society.

In functional materials, magnetic material occupies an important position. The strong magnetic material that can be used to make magnetic functional devices is called magnetic material. Magnetic material including hard magnetic materials, magnetic materials, semi-hard magnetic materials, magnetostrictive materials, magnetic thin films, magnetic powder and magnetic fluid, magnetic refrigeration materials and magnetic storage materials, including dosage the biggest, the most useful is hard magnetic materials and soft magnetic materials. The 21st century will be one of the world's economy and technology rapid development era, rare earth permanent magnet in promoting high-tech industry (especially the development of electronic information industry) plays an important role in, and one of ndfeb permanent magnet material is one of the eye.

With the characteristics of small mass and strong magnetism, it is the most cost-effective magnet to date, and is known as the magnetic king in the field of magnetism.

Ndfeb as the third generation of rare earth permanent magnet material, widely used in motor compared with the traditional motor, with high efficiency and energy saving light quality, small volume, good speed regulation characteristics of reliability, can be widely used in wind power, electric vehicles, industrial electrical, household electrical and other fields, its high cost performance makes its application field continues to expand, so in recent years obtained the rapid development of scientific research and production application ways.

Good permanent magnet materials should have the following three conditions: high saturation magnetization, high Curie temperature Tc and high magnetic anisotropic field Ha.

Ndfeb manufacturing than other rare earth permanent magnet material is rich and cheap raw material, make its prices sharply lower, at the same time it has a record of the maximum magnetic energy product (up to 512 theoretically KJM / 3), high room temperature anisotropy field (Ha) = 7 T and high saturation magnetic pole strength (Js = 1.6 T), thus attracted much attention. The excellent intrinsic magnetic properties of the main phase Nd2Fe14B are the main sources of magnetic properties of such magnets. Deficiency is its relatively low Curie temperature (Tc = 312 ℃), the coercive force is high enough, therefore, the poor thermal stability and corrosion resistance limits its application.

- nd-fed-boron material obtained by the double - and - - law system

Intergranular diffusion dual alloy was prepared using sintered ndfeb permanent magnetic material can under the less sacrifice of remanent magnetism, greatly improve the coercive force, its main alloy generally choose close to Nd2Fe14b is composition of alloy, using quick-setting smelting alloy thin belt technology, can effectively restrain alpha - Fe phase.

The strong magnetic intensity of the nd-ti-boron material makes the magnetic levitation easier to achieve compared with the developed countries, at present, the domestic production of the nd-ti-boron magnet is the most used in the sound device.

In the motor, and the oil Wells last time, compared with the voice coil motor and other products in the field of the most foreign demand. Domestic application is still in infancy, investigate its reason, lies in the field of voice coil motor required high performance requirements of the specifications of the magnet, and China is now the vast majority of producers to meet the international standards, and also most domestic ndfeb magnet is applied in the medium product, its price also is far lower than the international market price, therefore, to enhance the competitiveness of the international market.

Ndfeb material industry in China must continue to speed up the technology innovation, to strengthen the application development of ndfeb permanent magnet ndfeb permanent magnet materials to broaden its application scope and the deep application, overall magnetic materials and technology of China is close to the international level, but not their own intellectual property and innovative products.