Classification of rare earths 1) Light rare earth (also known as 铈 group): 镧 , 铈, 镨 , é’• , é’·, é’ , é“• , é’† . 2) Heavy rare earth (also known as é’‡ group): 铽 , é• , é’¬ , é“’ , é“¥ , 镱 , é•¥ , é’ª , é’‡. The difference between the 铈 group and the é’‡ group is because the rare earth mixture obtained by separation of minerals is often named after the ratio of lanthanum or cerium. Rare earth metals (rare earth metals), also known as a rare earth element, is a general term for a group â…¢B periodic table scandium, yttrium, lanthanides 17 elements, commonly represented by R or RE. Their names and chemical symbols are é’ª (Sc), é’‡ (Y), 镧 (La), 铈 (Ce), 镨 (Pr), é’• (Nd), é’· (Pm), é’ (Sm), é“• (Eu ), Gd, Tb, Dy, Ho, Er, Tm, Yb, Lu. Their atomic numbers are 21 (Sc), 39 (Y), 57 (La) to 71 (Lu). Yb In 1878, Jean Charles and G. de Marignac discovered a new rare earth element in the "é“’", which was named Ytterbium by Ytterby. ). î™” The main uses of cockroaches are: (1) As a heat shielding coating material.镱 can significantly improve the corrosion resistance of the electrodeposited zinc layer, and the ruthenium-containing coating is finer and more uniform than the ruthenium-free coating. (2) Used as a magnetostrictive material. This material has the property of being super magnetostrictive, that is, expanding in a magnetic field. The alloy consists essentially of ytterbium / iron alloy and dysprosium oxide / ferrite alloy, and a certain percentage of manganese to produce super magnetostriction. (3) The crucible element used to measure the pressure, the test proves that the crucible element has high sensitivity in the calibration pressure range, and at the same time opens up a new way for the application of pressure measurement in helium. (4) a resin based filler molar cavity, commonly used in the past to replace amalgam alloy. (5) Japanese researchers have successfully completed the preparation work ytterbium-doped gadolinium gallium garnet embedded waveguide laser line to complete the further development of laser technology it makes sense for this work. In addition, germanium is also used in phosphor activators, radio ceramics, electronic computer memory elements (magnetic bubble) additives, and glass fiber fluxes, as well as optical glass additives. ytterbium Barium acetate Ytterbium-doped lanthanum potassium tungstate crystal Fatty Acids,Natural Fatty Acids,Detergent Fatty Acids,Fatty Acids Soap Powder Ningbo Jiahe New Materials Technology Co.,ltd , https://www.cnjhchem.com