What is the use of rare earth? Introduction to the use of rare earth
4hw.com.cn: rare earth reference fields include military, metallurgical industry, petrochemical industry, glass ceramics and agriculture. Rare earth is the general name of 17 metal elements in the chemical periodic table, including lanthanides, scandium and yttrium.
1. Rare earth is known as industrial 'gold'. Because of its excellent physical properties such as photoelectric and magnetic properties, it can form a wide variety of new materials with different properties with other materials. Its most significant function is to greatly improve the quality and performance of other products. For example, greatly improve the tactical performance of steel, aluminum alloy, magnesium alloy and titanium alloy used to manufacture tanks, aircraft and missiles.
2. Adding rare earth metals or fluorides and silicides into steel can play the role of refining, desulfurization, neutralizing harmful impurities with low melting point, and improve the processability of steel; Rare earth ferrosilicon alloy and rare earth silicon magnesium alloy are used as spheroidizing agents to produce rare earth nodular cast iron. Because this nodular cast iron is especially suitable for the production of complex nodular iron parts with special requirements, it is widely used in machinery manufacturing industries such as automobiles, tractors and diesel engines.
3. The molecular sieve catalyst made of rare earth has the advantages of high activity, good selectivity and strong resistance to heavy metal poisoning. Therefore, it replaces aluminum silicate catalyst in petroleum catalytic cracking process.
4. Rare earth elements can increase the chlorophyll content of plants, enhance photosynthesis, promote root development and increase root nutrient absorption. Rare earth can also promote seed germination, improve seed germination rate and promote seedling growth. In addition to the above main functions, it can also enhance the ability of disease resistance, cold resistance and drought resistance of some crops.