Zegen Metals&Chemicals Limited Changsha (China)

Business overview

We are professional supplier on minor metals, rare earths, chemicals and sputtering targets. Materials used in semiconductor include various tellurium compound, arsenic compound, cadmium compound, indium compound and so on. They are compound and grew under strict condition to avoid impurity.Most of their purity is above 99.999%. Some models could be customized according to request like calcium tellurium. We are a new brand enterprise focused on advanced high performance materials, including crystal material, minor metals and chemicals, which is mainly used as raw material for ceramic materials, photoelectric materials and semiconductor industry. Materials used in optic is customized or grew to request mostly. We should know like size, orientation, proportion to customize it as ITO, mercury cadmium tellurium,highpure germanium, doped garnet and so on. Materials used in ceramic enhance strength, great special property like chemical ceramic, corrosion-resistance property, advanced strength, electronic ceramics.Those materials play important role in ceramic industry. Chemicals used in medical have part of antifungal, selenium supplement, health protection,abirritant, antiseptic, disinfector, measuring serum, cure skin disease, contraceptive and so on. Special chemicals are those that are difficult to produce or rare, but inevitable in some industry. It is our aim to find more better technology and application.



Industry Chemicals
Business Type Manufacturers & Exporter/Importer
Establishment Year 2013
Firm Type Pvt Ltd.
Expand Level International

Products & Services

Minor metals belong to nonferrous metals and just get small reserves, so it is called minor metals. Although the quantity is minor, it covers many kinds of metals as below. They play important roles in different industries, for example semiconductor, catalyst, solar cell, smelting, alloys, super alloys, hard alloys, chemicals, gold refining, optical materials and so on. Rare Earths belong to minor metals too. China is main source of various rare earths.

The first reserves of indium is in China, which take 90% of worldwide supplies. Indium is mainly used in display, LCD, FPD, low-melting-point alloys, solder, semiconductors and vacuum coating. It is mainly from byproduct of lead zinc ore. It is available in forms as wires, foils, powder, granular, sputtering targets and so on.

Tungsten own the highest melting point that is 3410?. It is raw material for hard alloys, special steels and tungsten filament. It is available in forms as wires, foils, powder, granules, rods, sputtering targets and so on.

Germanium gets wide applications in optical fibre communication, night-vision device, thermal imager, oil catalyst, solar cells and so on. It is available in forms as powder, shots, cubes and so on.

Vanadium is with melting point 3380?, so it forms stable carbide compound(V4C3) with C elements in steels. V could refining the structure and crystalline grains of steel and increase coarsening temperature of crystalline grains. It enhances the property of steel significantly. Vanadium strengthen intensity, tenacity, resistance to corrosion, abrasive resistance and bearing impact load.
Rare earths refer to lanthanoid in periodic table of chemical elements and other two elements that is closely related to fifteen elements of lanthanides. They include La, Ce, Pr, Nd, Pm, Sm, Eu, Gd, Tb, Dy, Ho, Er, Tm, Yb, Lu, Sc and Y.

Based on the electron structure and physicochemical property of rare earths and symbiosis situation in minerals and different property of ionic radius, the seventeen rare earths are divided into two groups.

Light Rare Earths ( or Cerium Group): Lanthanum, Cerium, Praseodymium, Neodymium, Promethium, Samarium, Europium, Gadolinium.

Heavy Rare Earths( Or Yttrium Group): Terbium, Dysprosium, Holmium, Erbium, Thulium, Ytterbium, Lutetium, Scandium, Yttrium.

Why they are called cerium group or yttrium group is cerium or yttrium take a big part in rare earth mixtures that separate from ores.

Rare earths are typical metal elements and their metal activity is just lower than alkalis and alkali metals, but higher than other metal elements. Rare earth elements can form chemically stable oxides, holides and sulfides. They can react with nitrogen, hydrogen, carbon and phosphorus, which dissolve in hydrochloric acid, sulfuric acid and nitric acid easily.

Rare earths compound with oxygen, sulfur and lead to form compounds of high melting temperature. So adding rare earths in molten steel, it can purifying steel. Due to metal atomic radius of rare earth elements are largers than steel’s atom, they fill up its crystalline grains and flaws and form film that prevent crystalline grains fro growing, which result in grain refinement and enhance the property of steel.

Rare Earths own underfill 4F electron structure that result in various electronic energy levels. So rare earths can use as excellent fluorescence, laser, electric light source and glaze of colour glass and ceramics.

When rare earth ions compound with hydroxy, azo group or sulfo group, they get wide applications in printing and dyeing industry. However there is property that the neutron capture area is larger among some rare earth elements, like samarium, europium, gadolinium, dysprosium and erbium. They could use as control material and moderator material of atomic reactor. But the neutron capture area of cerium and yttrium is small, they could use as diluent of reactor fuel.

Rare earths have similar property of microelements,which could accelerate sprouting of seeds and growing of roots and photosynthesis.

Product Catalogue (4)

Contact Details

Zegen Metals&Chemicals Limited

No.1 Tongxin Rd.
Changsha, 420200 (Other) - (China)



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