Molybdenum News Center

Molybdenum Molybdenum powder of high purity leads to high voltage high current semiconductor devices, audio-visual equipment, camera parts and high-density integrated circuit gate electrode targets. To purity molybdenum powder preparation, must first obtain high purity molybdenum trioxide or purity halides. The process to obtain high purity molybdenum trioxide are: 

 

1 plasma physical vapor deposition method 

Air plasma treatment ordinary molybdenum trioxide, molybdenum trioxide lower boiling point than the use of most impurities features make it evaporate quickly in air plasma flame, and then introduced into the plasma flame outside a lot of cold air chilled gaseous molybdenum trioxide, obtain ultrapure molybdenum trioxide powder. 

 

2 ion exchange method 

The raw material powder was dissolved in water was added with stirring Teflon container, and then 1 L / h to a vessel speed of 30% was added at a concentration of H2O2. The resulting solution was passed through H type cation exchanger, the vessel was heated to 95 ℃, the suction pressure was maintained at about 25 Pa 5 hours, a precipitate formed, that is, high purity molybdenum trioxide and concentrated. 

 

3. Chemical decontamination method 

By repeatedly recrystallized purity ammonium molybdate, molybdenum trioxide and then calcined to obtain high purity. After obtaining high-purity molybdenum trioxide, hydrogen reduction using the traditional method and plasma hydrogen reduction method can obtain high-purity molybdenum powder. Preparation of these types of applications are reported, but details were not specific technical ideas and openly. 

Obtain high-purity halide process principle is: the industrial trioxide or molybdenum metal scrap (such as vertical melting of the chuck, molybdenum metal scrap, waste molybdenum wire, etc.) to obtain halide halide (usually molybdenum pentachloride), and then under a high temperature condition of about 550 ℃ molybdenum halides fractionation process, volatile impurities inside obtain purified molybdenum halides depth (up to said purity 5 N), hydrogen chloride and finally through a plasma flame or hydrogen flame reduction to give high purity molybdenum powder. 

More molybdenum product: http://www.molybdenum.com.cn
Tel: 0592-5129696 Fax：0592-5129797
E-mail:  This email address is being protected from spambots. You need JavaScript enabled to view it.
Tungsten & Molybdenum Information Bank: http://i.chinatungsten.com
Tungsten News & Tungsten Prices, 3G Version: http://3g.chinatungsten.com
Tungsten News & Tungsten Price: http://www.chinatungsten.com