| Identification | Back Directory | [Name]
TUNGSTEN SILICIDE | [CAS]
12039-88-2 | [Synonyms]
TUNGSTEN SILICIDE
TUNGSTEN DISILICIDE
TUNGSTEN SILICIDE (99.7%-W)
TUNGSTEN SILICIDE, -325 MESH
Tungsten silicide, 99.5% (metals basis)
TUNGSTEN SILICIDE, 99.995% (METALS BASIS EXCLUDING MO), MO <
Tungsten silicide, 99.995% (metals basis excluding Mo), Mo <20ppm | [EINECS(EC#)]
234-909-0 | [Molecular Formula]
Si2W | [MDL Number]
MFCD00049704 | [MOL File]
12039-88-2.mol | [Molecular Weight]
240.01 |
| Chemical Properties | Back Directory | [Appearance]
Blue-gray, very hard solid. Insoluble in water; attacked by fused
alkalies and mixture of nitric and hydrofluoric acids. | [Melting point ]
2165°C | [density ]
9,88 g/cm3 | [solubility ]
insoluble in H2O | [form ]
Powder | [color ]
blue-gray tetragonal crystals, crystalline | [Specific Gravity]
9.88 | [Resistivity]
33.4 (ρ/μΩ.cm) | [Water Solubility ]
Insoluble in water. | [Crystal Structure]
Tetragonal | [Hydrolytic Sensitivity]
2: reacts with aqueous acid | [Exposure limits]
ACGIH: TWA 3 mg/m3
NIOSH: TWA 5 mg/m3; STEL 10 mg/m3 | [Uses]
Oxidation-resistant coatings, electrical resistance
and refractory applications. | [CAS DataBase Reference]
12039-88-2 | [EPA Substance Registry System]
Tungsten silicide (WSi2) (12039-88-2) |
| Hazard Information | Back Directory | [Description]
Tungsten silicide (WSi2) is an inorganic compound, a silicide of tungsten. It is an electrically conductive ceramic
material. Tungsten silicide can react violently with substances such as strong acids, fluorine, oxidizers, and interhalogens.
It is employed in microelectronics as a contact material, with a resistivity of 60-80 μΩ cm; it forms at 1000℃. It is frequently used as a shunt over polysilicon lines to increase their conductivity and increase signal speed. | [Chemical Properties]
Blue-gray, very hard solid. Insoluble in water; attacked by fused
alkalies and mixture of nitric and hydrofluoric acids. | [Hazard]
Dust flammable. |
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