Molybdenum

Molybdenum
3D Printing Technology of the Cemented Carbide 1,476

Using the principle of discrete-stacking, 3D printing technology?is the manufacturing method to produce molded solid parts by layer-by-layer accumulation?way based on three-dimensional model. For the?rapid proto?typing?advantage?of complex part, it provides?the?solution for the preparation of cemented carbide parts to a certain extent. After recent years of development, printing technology has played an increasingly important role in the preparation of precision parts. 1.0 Spray adhesive powder forming printing alloy The printer carries out the STL file through the computer to form the…

Molybdenum
Production Method of Molybdenum-Based Catalyst 453

Currently the increasing haze weather in China has attracted high attention on environmental pollution. To control environmental pollution, it is necessary to control the emission of pollutants from motor vehicles. The key is to reduce the content of sulfur and make the desulfurization. At present, more than 95% of refineries in the world use molybdenum-based?catalysts for desulfurization, which has the characteristic of high direct desulfurization activity and low hydrogen consumption. The common catalysts are cobalt-molybdenum catalysts and nickel-molybdenum catalysts. The…

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Molybdenum Disulfide Used in the Lubrication Field 479

Molybdenum disulfide (MoS2) is known as the “king of lubrication” and has unique advantages?in the lubrication field. It has a layered structure and still keeps good lubrication property under severe conditions such as high temperature, high pressure, high rotation, and ultra-low temperature. MoS2 is a kind of natural excellent solid lubricant because of its low friction coefficient with only 0.05. It also has excellent properties such as natural weak alkalinity and excellent anti-oxidation ability, which is used in the aviation…

Molybdenum
Preparation Method of Nano Molybdenum Disulfide 468

As the excellent property of nano molybdenum disulfide, its preparation method has attracted great attention at home and abroad.?Currently the chemical synthesis methods of nano molybdenum disulfide mainly include: chemical reduction, chemical decomposition, chemical oxidation, electrochemical, surfactant assisted, hydrothermal and solvothermal synthesis method,?natural mineral purification and physical method, etc. 1.0 Chemical reduction method The pentavalent and hexavalent salt or compound of molybdenum have strong oxidizing property and can be reduced to tetravalent molybdenum under the action of reducing agent. The…

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The use of High Purity Molybdenum Sputtering Target in Liquid Crystal Display 460

With the development of science and technology, molybdenum shows its advantages in many fields, which has changed human life in various aspects, one of the familiar applications is to manufacture?liquid crystal display. Large-size high purity molybdenum sputtering target is the key raw material in the producing of LCD panel, and Mo is one of the preferred materials for sputtering target of LCD panel. This kind of target is used in the daily color TV, intelligent phone, tablet computer and some…

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Common Preparation Methods of Molybdenum Powder 480

Molybdenum?powder prepared by traditional technology is often used to be raw material of molybdenum sintered products, the common preparation methods include reduction method, fluidized bed reduction method, hydroxyl thermal decomposition method etc. 1.0 Reduction method 1.1 Ammonium molybdate roasting→two-stage reduction. This method is the main method used in industrial production, the purity of Mo powder produced is high, the particle size is usually in micron level. 1.2 Ammonium molybdate two-stage reduction method. Without calcination, ammonium molybdate is directly reduced once…

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Preparation of Molybdenum Carbide 465

Molybdenum carbide (chemical formula MoC) has the characteristics?of high melting point, hardness, good thermal, fine mechanical stability and excellent corrosion resistance. Molybdenum is a kind of silvery white refractory metal with melting point of 2615℃ and density of 10.2g/cm3, its expansion coefficient is almost the same as that of the special glass used in electron tubes. Molybdenum is stable at room?temperature and oxidizes rapidly above 600℃. It reacts with carbon, hydrocarbon or carbon monoxide to generate MoC above 800℃. Preparation…

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Preparation Methods of Molybdenum Carbide 285

With the development of chemical engineering technology, there are a series of synthesis methods used to produce nanometer scale pure molybdenum carbide (chemical formula MoC)?, the followings are five common preparation methods: 1.0 Temperature programmed reduction method The temperature programmed method raised in the 1980s is still the most widely used method to obtain MoC in the laboratory, during the reaction experiment, molybdenum oxide is used as molybdenum source, hydrocarbon gas and hydrogen are used as basic materials for carbon…

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