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 钇 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).
é•(Dy)
In 1886, the Frenchman Pois Baudler succeeded in separating the cockroach into two elements, one still called é’¬, and the other named dysprosium according to the meaning of "hard to get" from é’¬.é• is currently playing an increasingly important role in many high-tech fields.
The main uses of cockroaches are:
(1) as an additive neodymium iron boron permanent magnets, which magnets adding about 2 to 3% of dysprosium, coercivity can be improved, the demand for small dysprosium past, but with NdFeB magnets As demand increases, it becomes a necessary addition element, the grade must be around 95 to 99.9%, and demand is rapidly increasing.
(2) é• is used as a phosphor activator. Trivalent cerium is a promising active ion of a single luminescent center trichromatic luminescent material. It is mainly composed of two emission bands, one for yellow emission and the other for blue light. The emitted, erbium-doped luminescent material can be used as a trichromatic phosphor.
(3) Niobium is an essential metal material for the preparation of a large magnetostrictive alloy, Terfenol alloy, which enables the precise movement of some mechanical movements.
(4) Base metal can be used as a magneto-optical storage material with high recording speed and reading sensitivity.
(5) Preparation of the lamp for the dysprosium, used in the working substance is dysprosium iodide, dysprosium lamp, which lamp has high brightness, good color, high color temperature, small size, arc stability, etc., has been used in film, printing And other lighting sources.
(6) Because the cerium element has a large neutron capture cross-sectional area, it is used in the atomic energy industry to determine the neutron energy spectrum or to make a neutron absorber.
(7) Dy 3 Al 5 O 12 can also be used as a magnetic working substance for magnetic refrigeration. With the development of science and technology, the application fields of é• will continue to expand and extend.
Yttrium oxide
Neodymium iron alloy
NdFeB-grade strontium iron alloy
Add a small amount of é• (dy) metal material 1
Add a small amount of é• (dy) metal material 2
hot dipped galvanized welded rock cage
Welded gabions are wire mesh containers welded with high quality steel mesh.They can be filled on site with hard durable stone materials to form mass gravity retaining structures. Owing to their inflexibility, welded gabion can not adapt to differential settlement or be used in water courses ,In comparison with woven wire gabions, welded gabion offer a higher strength. In order to meet different project requirements, various wire diameters and unit sizes are available for welded gabion. It is composed of Welded Mesh panel and spring steel lacing wire.
As
a highly-accomplished wire mesh exporter, Kingdelong was established
jointly by China and South Korea in 1986, Our strategic location in
Anping County,Hebei province is only 300KM away from Beijing and
Tianjin, which offers us very competitive advantages both in trade and
logistics. Through two decades of hard work, Kingdelong company had
evolved into one of China`s largest wire mesh manufacturing
companies,Covering an area of over 200,000㎡, certificated by ISO 9001
& ISO 14001,as well as more than 450 diversified production
machines, which are either imported from foreign countries or developed
in-house.Wire mesh products find applications in a wide range of
industries, from Pharmacy to petroleum and chemical to textile.
Welded Gabion Mesh,Welded Wire Mesh,Mesh Welded Gabion Wire,Gabion Retaining Wall Wire
ANPING KINDELONG WIRE MESH CO.,LTD. , https://www.apkdlwiremesh.com