Molybdenum
Hard, silvery-white molybdenum, named after Sweden's KW Chalet ore molybdenum, is one of the rarest metals.
Molybdenum is often used as an additive in steel materials. It is an indispensable metal for various uses such as high melting point, excellent mechanical properties, and relatively easy workability compared to tungsten. A.Terring target as wiring material for solar cells and flat panel in the field of power electronics.
Chemical properties
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Oxidation in air starts at room temperature and progresses considerably at dark red temperatures.
Molybdenum does not react with dry oxygen at room temperature, but it oxidizes rapidly at 500℃ or higher, and evaporates at 650℃ or higher, turning into white mouse-colored MoO3.
It readily reacts with sulfur, carbon or silicon at high temperatures to form MoS', Mo'C, MoSi', etc.
Although difficult to react at 1 atm, nitrides are synthesized by heating under high pressure (>15 atm).
It has a strong affinity for arsenic.
At 20℃, it hardly corrodes in hydrofluoric acid, hydrochloric acid and sulfuric acid, but it corrodes considerably in nitrate, high concentration sulfate (250℃) and aqua regia.
High melting point
Molybdenum has the fifth highest melting point among metals. It has a low coefficient of thermal expansion and very high shape stability even in high temperature environments.
Large electric resistance
Molybdenum has a relatively high electrical resistance. It is provided as a heater for a high-temperature furnace and an electrode for lighting.
Easy workability
Among refractory metals, molybdenum, which is relatively easy to work with, can be applied to complex shapes such as boxes and meshes.
