Molybdenum itself is a demanded and expensive material, the extraction of which is a very time-consuming process. Molybdenum powder is a finely dispersed composition with a small presence of impurities, has a gray color. It is produced by reduction with hydrogen.
Metallurgy using molybdenum is very complex due to its exceptional refractoriness. Therefore, the metal is first pulverized. Then it is sent to an electric arc furnace with a consumable electrode. Molybdenum powder is heated on the surface of each particle, and then compressed into a finished product. In terms of strength, it is practically not inferior to a cast sample, but it does not need to spend a lot of money on its manufacture.
Molybdenum powder may vary depending on the method of application: For spraying with a plasma apparatus. It is distinguished by the presence of additives, as well as the optimal particle size for this procedure. Reduced chemical reaction powder. This is the purest metal that is used only to control chemical processes.
Compact type powder. It differs from other powders in particles of different sizes, so it is perfectly optimized. The air content in such a powder almost tends to zero.
Briquette type powder. It is advantageous for the production of large parts, because it significantly speeds up the loading of furnace bins. Also, with its help, it is convenient to dispense without instrumentation.
Molybdenum powder is obtained from molybdenum anhydride (molybdenum acid MoO3) by reduction with hydrogen. The conditions of the recovery process are determined depending on the final destination of the resulting powder. Molybdenum powder intended for the further manufacture of wire, rods, sheets and other products should contain 99.9% molybdenum and have a fine-grained structure. Molybdenum powder, which is used in the production of steel, should be 99.0-99.5% molybdenum and may have larger grains.
The purity of the resulting molybdenum powder largely depends on the purity of the starting MoO3 oxide. It is very important that the molybdenum oxide contains a small amount of impurities. The grain size of the obtained powder depends on the reduction conditions and on the grain size of the molybdenum oxide. As a rule, the molybdenum powder is obtained the larger, the larger the grain size of the original molybdenum acid. The temperature at which molybdenum is reduced and the concentration of water vapor also affect the grain size. The average grain size of the molybdenum powder increases with increasing recovery temperature. By selecting the appropriate reduction conditions and MoO3 molybdenum anhydride, it is possible to obtain molybdenum powder with an average grain size of 0.5 to 10 microns or more.
Molybdenum powder has a number of positive qualities that are necessary in various industries. This is not only its high melting point (heat resistance), but also its wear resistance and corrosion resistance. It also has good acid resistance.
Molybdenum powder in electronic magnification Molybdenum powder
● Molybdenum powder is actively used in the manufacture of electrodes.
● It is also used in the petrochemical industry, in mechanical engineering and in metallurgy.
● It is used as an element for plasma spraying.
● Often molybdenum powder is used as a catalyst in the chemical industry.
● It is used for the production of semi-finished molybdenum.
● And it is also necessary in electrical engineering, for the manufacture of electrical contacts, in the manufacture of lighting equipment..