As the name suggests, graphite products are all kinds of graphite accessories and special-shaped graphite products processed by CNC machine tools on the basis of graphite raw materials, including graphite crucible, graphite plate, graphite rod, graphite mold, graphite heater, graphite box, graphite rotor and other series of graphite products.
At present, graphite products are widely used in rare earth permanent magnet industry. The main graphite products used in this industry are graphite boxes for sintering, also known as stone cartridge, graphite boat and so on.
First of all, let’s introduce what is rare earth permanent magnet material, and the application and use of its graphite products in the production of this industry. Rare earth permanent magnetic material is a kind of magnetic material, which is made of the alloy composed of samarium, neodymium mixed rare earth metal and transition metal (such as cobalt, iron, etc.), sintered by powder metallurgy method and magnetized by magnetic field. Rare earth permanent magnet materials are divided into SmCo permanent magnet and NdFeB permanent magnet. Among them, the magnetic energy product of SmCo magnet is between 15-30 mgoe, and that of NdFeB magnet is between 27-50 mgoe, which is called “permanent magnet king”. Samarium cobalt permanent magnet, despite its excellent magnetic properties, contains rare earth metal samarium and cobalt, which are rare and expensive strategic metal cobalt. Therefore, its development has been greatly restricted. After years of efforts of scientific researchers in China, the state has invested a lot of funds in the industry, and new rare earth transition metal and rare earth iron nitrogen permanent magnet alloy materials are being developed, It is possible to become a new generation of rare earth permanent magnet alloy. The production of magnetic materials needs to use the graphite case to be sintered at high temperature in a vacuum furnace. The permanent magnetic materials are attached to the inner surface of the graphite case at the same temperature, and the required permanent magnetic materials and permanent magnetic alloys are finally refined.
As a manufacturer of graphite products, the graphite box (graphite ark, graphite cartridge) produced by Zhonghong new materials is widely used in rare earth permanent magnet manufacturers, and has been praised by customers and established a long-term stable cooperative relationship!
Post time: Jun-18-2021