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| Molybdenum silicide Basic information |
| Product Name: | Molybdenum silicide | | Synonyms: | Molybdenum disiticide;Molybdenum silicide (99+% Mo);MOLYBDENUM DISILICIDE, POWDER, <2 MICRON , 99+%;Mo61%min,typically99.5%(metalsbasis);MOSI2 A MOLYBDENUM SILICIDE GRADE A - A PRODUCT OF H.C. STARCK;MOSI2 B MOLYBDENUM SILICIDE GRADE B - A PRODUCT OF H.C. STARCK;MOSI2 C MOLYBDENUM SILICIDE GRADE C - A PRODUCT OF H.C. STARCK;MOLYBDENUM SILICIDE: 99.5%, -325 MESH | | CAS: | 12136-78-6 | | MF: | MoSi2 | | MW: | 152.11 | | EINECS: | 235-231-8 | | Product Categories: | Ceramics;Metal and Ceramic Science;Silicides;metal silicide | | Mol File: | 12136-78-6.mol |
| Molybdenum silicide Chemical Properties |
| Melting point | 1930°C | | density | 6.31 g/mL at 25 °C(lit.) | | form | powder | | color | Dark gray | | Specific Gravity | 6.31 | | Water Solubility | Insoluble in acids and aqua regia, however, it is soluble in HF and HNO{3}Soluble in nitric acid and hydrofluoric acid. Insoluble in water most acids. | | Exposure limits | ACGIH: TWA 10 mg/m3; TWA 3 mg/m3NIOSH: IDLH 5000 mg/m3 | | EPA Substance Registry System | Molybdenum silicide (MoSi2) (12136-78-6) |
| Hazard Codes | Xn | | Risk Statements | 20/21/22 | | Safety Statements | 36 | | WGK Germany | 3 | | TSCA | Yes |
| Molybdenum silicide Usage And Synthesis |
| Chemical Properties | Molybdenum silicide is dark-gray, crystalline powder. Not affected by air upto 1648°C. Not attacked by most inorganic acidsincluding aqua regia, but very soluble in hydrofluo-ric and nitric acids. Has high stress-rupture strength. | | Uses | MOLYBDENUM SILICIDE can be considered as an electrically conducting ceramic with primary use in heating elements operating at temperatures above 1,500℃ in air. It is also considered as a material for very high temperature structural applications.
| | Uses | In electrical resistors, in protective coatings at high temperatures, and in engine parts in space vehicles Molybdenum silicide is used in electric furnaces, glass, steel, electronics and ceramics industries. It finds application in heat treatment materials. It is also used in microelectronics as a contact material. Further, it serves as a dry lubricant. | | Application | Molybdenum disilicide (MoSi2) is a ceramic material with excellent high-temperature oxidation resistance and corrosion resistance. It can be used as a substrate material in the fabrication of thermophotovoltaics. MoSi2 can also be used as a protective coating on carbon-carbon composites for potential applications in aerospace and thermonuclear fusion. | | Preparation | Molybdenum disilicide is a promising candidate material for high temperature structural applications. Molybdenum silicide is produced in much the same way as ferromolybdenum. A typical mix for the production of molybdenum silicide is 1,000pounds of molybdenum in oxide, 259 pounds of aluminum, 760 pounds of 90-percent ferrosilicon, 166 pounds of 50-percent ferro-silicon, 160 pounds of lime, and 50 pounds of high-grade fluorspar. | | Definition | MOLYBDENUM SILICIDE is A cermet.
| | General Description | This product has been enhanced for energy efficiency. | | Hazard | MOLYBDENUM SILICIDE is Toxic material.
| | Flammability and Explosibility | Notclassified | | Industrial uses | High-temperature silicides are a new class of materials with potential applications in the temperature range 1200 to 1600 C.The silicide that seems most promising is molybdenum disilicide (MoSi2) because of its high melting temperature (2200 C) and excellent oxidation resistance. It has a tetragonal crystal structure. A major problem is its absence of ductility at temperatures up to 1000 C. It also has poor high-temperature strength due to the presence of a grain boundary silicon-rich phase that may become viscous at very high temperatures. Recent research has shown that this problem may be solved by the addition of carbon to the material. |
| Molybdenum silicide Preparation Products And Raw materials |
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