Overview
Molybdenum is a transition metal with the chemical symbol Mo and atomic number 42. It is a silvery-white, hard metal with one of the highest melting points of all pure elements. Molybdenum is not found as a free metal in nature but is obtained from molybdenite (MoS₂) and other minerals. Due to its exceptional strength and resistance to corrosion, molybdenum is a critical component in various industrial applications. It is commonly used in high-strength alloys, particularly in the aerospace and defense industries. Additionally, its catalytic properties make it valuable in chemical manufacturing.
Physical and Chemical Properties
Molybdenum is characterized by its high melting point (2,623°C) and boiling point (4,639°C), making it suitable for high-temperature applications. It has a density of 10.28 g/cm³ and is insoluble in water but dissolves in concentrated acids like nitric and sulfuric acid. The metal exhibits excellent thermal and electrical conductivity, comparable to tungsten. Its corrosion resistance is notable, especially in reducing environments. Molybdenum forms stable compounds in various oxidation states, with +4 and +6 being the most common.
Main Applications
Molybdenum is primarily used in the production of alloys, where it enhances strength, hardness, and heat resistance. Stainless steels and superalloys often contain molybdenum to improve performance in extreme conditions, such as jet engines and nuclear reactors. In the chemical industry, molybdenum serves as a catalyst in petroleum refining and the production of polymers. It is also used in electronics for thin-film transistors and as a lubricant additive due to its low friction properties. Molybdenum disulfide (MoS₂) is a common dry lubricant in high-temperature environments.
Safety and Storage
Molybdenum in bulk form is relatively inert, but its powder or dust can be hazardous, causing respiratory or skin irritation. Proper ventilation and personal protective equipment (PPE) are recommended when handling fine molybdenum particles. Storage should be in a dry, cool environment, away from oxidizing agents. Containers must be sealed to prevent moisture absorption, which can lead to degradation over time. Disposal should comply with local regulations to avoid environmental contamination.
B2B Procurement Guide
When procuring molybdenum, consider the required purity level, form (powder, ingot, wire), and intended application. High-purity molybdenum (99.95% or higher) is essential for electronic and aerospace uses, while lower grades may suffice for industrial alloys. Supplier reputation and certification (e.g., ISO 9001) are critical for quality assurance. Prices vary based on market demand and form, with powders typically costing more due to processing complexity. Bulk purchases may qualify for discounts, but ensure storage conditions are met to preserve material integrity.
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