Molybdenum silicide ceramics is a compound of silicon and molybdenum. Typically silicon and molybdenum in different ratios and different reaction conditions can generate three compounds. The formulas of these compounds are: Mo₃Si, Mo₅Si₃ and MoSi₂. MoSi₂ belongs to tetragonal system and it has stable chemical and physical properties, density: 6.3g/cm³, melting point: 2030 ℃, room temperature resistance: 21.6μΩ ? cm and good high temperature anti-oxidation performance, so it is often made into heating element used in high temperature oxidizing atmosphere.

Molybdenum disilicide (MoSi₂) is an important silicide ceramics. In the crystal structure of MoSi₂ Si atoms and Mo atoms form a two-dimensional closely aligned basic structure. If this basic structure is layer, then we can use layer lamination to express the structure of MoSi₂.

Molybdenum disilicide ceramics often as structural material used in high-temperature aerospace, automotive and other high temperature fields. Currently, it is the latest hot intermetallic compound structural materials research focus. In addition, it is often used as heating elements used in various resistance furnaces, where the U-shaped silicon molybdenum rod is the most commonly used.

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