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the application of rare earth magnets 1

The application of rare earth materials.
Rare earth materials include rare-earth permanent magnets, rare earth hydrogen storage materials, rare earth luminescent materials, rare earth catalytic materials and rare earth anti-corrosion materials. The analysis of the definition and application of rare earth materials are as following.
1. rare-earth permanent magnets
Nowadays as we knowed, Rare-earth magnets is the magnetic materials with highest overall performance. The property is 100 times higher than that of magnet in nineteenth century. It is much more superior than ferrite magnet and alnico magnet and twice china magnets property than that of expensive platinum-cobalt alloy. Magnetized rare earth permanent magnets can create a strong permanent magnetic field without any additional energy. They are widely used in various motors, electro-acoustic, magnetic resonance imaging devices, medical equipment, magnetic levitation trains, military industry and other high-tech fields such as optoelectronics.
2. rare earth hydrogen storage materials
Hydrogen storage materials is a material that can absorbt and desorbt hydrogen with a large number and reversibility under certain conditions. In a series of developed hydrogen storage materials, rare earth-based hydrogen storage materials has the highest property. rare earth-based hydrogen storage materials is often an alloy which contains rare earth metal elements or intermetallic compounds. As the rare-earth hydrogen storage alloy has the advantages of large hydrogen absorption capacity, easy to activate, not easy to poisoning and rapid absorption and desorption hydrogen, it has become the most representative and a class of important practical hydrogen storage material. Its application field has expanded to the energy, chemicals, electronics, aerospace, military and civilian aspects. Rare-earth hydrogen storage alloy can be used for H2 storage and purification.
3 .rare earth luminescent materials
Rare earth elements play an important role in the luminescent materials. Lighten rare earth compounds is due to transition of 4f electrons in rare earth elements within the configuration fd or ff . As rare earth ion has wealthy energy levels and property of 4f electronic transition, the rare earth has become a huge luminescent treasures. It provides superior performance light-emitting materials for high-tech industry. Rare earth luminescent materials are widely used in night vision equipment, road traffic signs, promote plant growth, UV disinfection, health care, luminous display and simulate natural light full spectrum light source, such as special lighting and equipment production. The application areas will be expanded continuously.
4 rare earth catalyze materials
Light rare earth with special 4f electron shell structure makes it to show good catalyse performance and the effectiveness in the chemical reaction process, it has huge application market and development potential. Rare earth catalyze materials are mainly three categories, including rare earth catalyze molecular sieve materials, rare earth perovskite-based catalyze materials and cerium catalyze materials. It has been researched and applied in many energy enviroment field, such as in motor vehicle exhaust gas purification, petrochemicals, fuel cells, catalytic combustion of lead additives, and polymer ¡¡¡¡5 Rare Earth anticorrosion materials
¡¡With steel and other metals¡¯widely application in the social production and all aspects of life, the corrosion of metal equipment and materials has become a serious obstacle for current economic development, the various accidents caused by corrosion has become a direct threat for human life and property safety . Rare earth Aluminum and Magnesium Alloys is a type of high-strength anticorrosion materials which can be compounded in the surface of carbon steel structure, It can be used in sea water and similar environments, and can be applied for long-term corrosion of hydraulic steel structures.

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