Molybdenum foil’s physical properties enable its wide use in high-temperature, electronics, and aerospace applications. 1) Density: 10.28 g/cm³, close to tungsten (19.25 g/cm³), providing high strength. 2) Melting Point: 2623°C, supporting 2000°C applications like sapphire growth furnaces. 3) Boiling Point: 4639°C, indicating stability under extreme conditions. 4) Thermal Expansion Coefficient: 4.8 × 10⁻⁶/K, low and matching silicon and sapphire, minimizing thermal stress. 5) Thermal Conductivity: 138 W/m·K, enabling efficient heat dissipation, ideal for semiconductor substrates. 6) Electrical Conductivity: 1.87 × 10⁷ S/m, supporting sputtering targets and electrodes. 7) Specific Heat Capacity: 0.25 J/g·K, allowing rapid thermal response for heat management. 8) Elastic Modulus: 320 GPa, offering high rigidity and deformation resistance, suitable for precision components. 9) Poisson’s Ratio: 0.31, reflecting elastic behavior. 10) Creep Resistance: Maintains strength (100-200 MPa) at 1000-2000°C, outperforming aluminum and copper. Properties vary with purity (≥99.95% optimal) and processing (cold-rolled offers higher strength). Oxidation above 600°C requires vacuum protection to prevent performance degradation. Quality control involves density measurement, thermal conductivity testing, and microscopic analysis to ensure stable performance, meeting high standards in electronics and aerospace.
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