China Has Become The Largest Production Base Of Rare Earth Permanent Magnet Materials

"In the early days, the rare earth permanent magnet material industry was a tripartite confrontation in the world, with my country, Europe, America, and Japan each accounting for 1/3. But until now, my country has occupied a dominant position, and 70% to 80% of the world's products are produced in my country At present, the output of permanent magnet materials is still growing at a rate of 20% to 30% per year." Li Wei, deputy director of the Functional Materials Research Institute of the Iron and Steel Research Institute, told the reporter quite proudly.

The national "863" plan project "Key Technology of Preparation and Surface Treatment of High-performance Rare Earth Permanent Magnet Materials" was officially launched in 2001. In the field of functional materials, this project has received the most support. Li Wei explained that the main reason is the strategic position of rare earth permanent magnet material resources in my country.

my country is a country with a large resource of rare earth permanent magnet materials. Deng Xiaoping once said: "The Middle East has oil, and China has rare earths." Among the world's proven rare earth reserves of 45 million tons, my country owns 36 million tons, accounting for about 80% of the world's proven reserves. Starting from the "Sixth Five-Year Plan", the country has invested a lot of money every year for the development and expansion of the application of rare earth resources. Li Wei told reporters: "In the application of rare earths, rare earth permanent magnets are recognized by the material industry as the most successful application, and it has reached the level that people cannot do without in their production and life."

At present, with the rapid development of the production and application technology of rare earth NdFeB magnetic materials in my country, they have been widely used in mobile phones, notebook computers, audio and magnetizers, permanent magnet motors, sensors, magnetic couplings, magnetic separators, and watt-hour meters. and other devices. And the "863" plan "high-performance rare earth permanent magnet materials"

The high-grade sintered NdFeB magnet successfully developed by the project has made breakthroughs in key technical links and has a wide range of functions. Li Wei said: "The performance of the high-temperature magnet prepared by this project reached 9.6MGOe at 500°C, ranking in the leading position in the world. In terms of mechanical properties, hydrogen resistance properties, quick-setting thin strip composition segregation, and magnetic properties of high-performance NdFeB magnets, Significant progress has been made in the theoretical and experimental research on the mechanism of time stability, as well as in the research on the microstructure of the preparation materials of various heterosexual magnets. In addition to civilian use, the high-performance rare earth permanent magnet products we have developed have also been successfully applied in the field of defense, such as the latest strategic The inertial platform torque motor of the missile, the attitude control system, the inertial navigation system, and the propulsion system of the "Shenzhou" series of spacecraft and satellites. It also includes the solenoid valve for the orbit control engine, the mine control system of the ship, and the core of the missile, etc. "