Molybdenum alloy physical properties of molybdenum
Molybdenum has excellent physical properties, chemical properties and mechanical properties, making it a glass processing, aerospace and high performance materials widely used in electronic components. Pure molybdenum industrial world every year about 15 million pounds and its alloys.
It lies in the practicality of molybdenum provides design engineers with an integrated mechanical and physical properties, the following table lists the physical properties of molybdenum and its common metals as iron, nickel, copper, aluminum and electronic materials, silicon oxide, beryllium and aluminum compared to molybdenum thermal conductivity and specific heat combine to make the thermal shock and thermal fatigue member of natural selection.
Its melting point means the molybdenum at high temperatures with practical mechanical properties, and its density than the refractory metals tungsten and tantalum is much lower, indicating that the intensity ratio of tungsten, molybdenum and tantalum ratio is high. Brought to practical application requires weight of molybdenum and the high thermal conductivity and good thermal expansion match silicon silicon power devices make it an ideal material for heat, and thus improved performance of the device. Copper-clad structure of molybdenum greatly improves beryllium oxide and aluminum oxide on the substrate of the thermal performance of electronic devices.
Table molybdenum and other physical properties of materials
Material | Melting temperature ℃ | Resistivity nΩm |
Thermal conductivity W/mK |
Coefficient of thermal expansionm/m10-6 | Density g/cm3 |
Specific heat KJ/kg·K |
Iron | 1538 | 9.7 | 80 | 11.8 | 7.87 | 0.0447 |
Nickel | 1453 | 68.4 | 83 | 13.3 | 8.9 | 0.471 |
Copper | 1085 | 16.7 | 398 | 16.5 | 8.93 | 0.494 |
Aluminum | 660 | 26 | 247 | 22.5 | 2.7 | 0.9 |
Molybdenum | 2610 | 52 | 135 | 4.9 | 10.22 | 0.276 |
Tungsten | 3410 | 53 | 165 | 4.4 | 19.3 | 0.131 |
Tantalum | 2996 | 135 | 54 | 6.5 | 16.6 | 0.139 |
Niobium | 2468 | 168 | 53 | 7.31 | 8.57 | 0.27 |
Silicon | 1414 | - | 156 | 2.6 | 2.33 | 0.713 |
Al2O3 | - | - | 20 | 7.3 | 3.8 | 0.77 |
BeO | - | - | 240 | 7.5 | 2.9 | 1.01 |
AlN | - | - | 70~250 | 4.6 | 3.28 | 0.72 |
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