Pure molybdenum is a refractory metal with a silvery-white metallic luster. Its chemical symbol is Mo. It possesses a high melting point (2620°C), high strength, corrosion resistance, low thermal expansion coefficient, and excellent thermal conductivity.
Basic Properties
Pure molybdenum is a silvery-white metal (in bulk) or a dark gray/black powder (in powder form). It is hard and tough, with a density of approximately 10.2 g/cm³. Its atomic number is 42, its relative atomic mass is 95.95, and its resistivity is low (5.2×10⁻⁸ Ω·m), resulting in good electrical and thermal conductivity.
Physical and Chemical Properties
High-Temperature Performance: It has a high melting point of 2620°C and a boiling point of 4825°C. It maintains high strength at temperatures between 1100°C and 1650°C, and exhibits excellent creep resistance.
Stability: It has a low thermal expansion coefficient and is resistant to corrosion by molten glass and corrosive media. Oxides will not contaminate the glass.
Mechanical Properties: High strength at room and elevated temperatures, superior processability to tungsten, and can be formed into plates, bars, and wire through rolling and forging.
Production Process and Standards
Purity Standard: Industrial-grade pure molybdenum (e.g., Mo1) must be ≥99.95% pure, in compliance with Chinese national standard GB/T3876-2007.
