Chemical Properties of Molybdenum

Density of 10.2 grams / cubic centimeter. Melting point 2610 ℃. Boiling point 5560 ℃. Valence +2, +4 and +6, +6 price stability. Molybdenum is a transition element, easily change their oxidation state, redox reactions in the body plays a role in electron transfer. In the form of oxide, molybdenum price is likely to be in a state of +6. Although the electron transfer it is also likely during the first price reduction for the +5 state, but in the restored molybdenum enzymes have been found in other oxidation state. Molybdenum is a xanthine oxidase / dehydrogenase, aldehyde oxidase and sulfite oxidase components, and thus do know as essential trace element for humans and animals and plants.

Natural molybdenite MoS is a soft black mineral, shape and graphite similar. Before the late 18th century, both the European market to molybadenite name for sale. In 1779, Scheele pointed out that the graphite and molybadenite are two completely different substances. He found no effect of graphite nitrate, but not with molybadenite response, acquire a chalky white powder, it would be boiled together with the alkali solution, a salt crystallization. He believes that this white powder is a metal oxide, mixed with charcoal intense heat, there is no access to metal, but heat has been a total sulfur in the original molybadenite. In 1782, a Swedish master Elmo mine separates the metal from the molybadenite named molybdenum, element symbols as Mo. We translated into molybdenum.

The Use of Molybdenum

Molybdenum is mainly used in steel industry, most of which are directly used for industrial molybdenum oxide briquette steel or cast iron, melting into a small part of molybdenum and then iron used in steelmaking. Molybdenum content in low alloy steel is less than 1%, but in this area the total molybdenum consumption accounts for about 50% of consumption. Adding molybdenum stainless steel can improve the corrosion resistance of steel. Adding molybdenum in cast iron, iron can improve strength and wear resistance. Molybdenum 18% of the nickel-based superalloy with high melting point, low density and thermal expansion coefficient and other characteristics, for the manufacture of various high temperature aerospace parts. Mo in the tubes, transistors, and rectifiers and other electronic devices are widely used. Molybdate Molybdenum Oxide and the chemical and petroleum industry in the fine catalyst. Molybdenum disulfide is an important lubricant for the aerospace and mechanical industries. Molybdenum is a trace element necessary for plant, one of trace elements in fertilizers used in agriculture.

Pure molybdenum wire for high temperature furnaces and wire cutting EDM there; molybdenum sheet used to make radio equipment and X-ray equipment; molybdenum high temperature ablation, mainly used for bore artillery, rocket nozzle, tungsten light bulb manufacturing support . Adding molybdenum alloy can improve the elastic limit, corrosion resistance and to maintain a permanent magnetic, etc., molybdenum is required for plant growth and development in the seven micro-nutrients in one, without it, plants can not survive. Animals and fish, and plants that also need to molybdenum.