| 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. | [Thermal Conductivity]
40.585 W/(m·K) | [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) |
| Questions And Answer | Back Directory | [Preparation]
(1) Mix tungsten powder and silicon powder in a molar ratio of 1:2, and titanium powder and graphite powder in a molar ratio of 1:1, and then mix them evenly. (2) Place the W-Si mixed powder in the center of the crucible, and evenly place the Ti-C mixed powder between the W-Si mixed powder and the crucible. Finally, place a layer of Ti-C mixed powder on top of all the mixed powders. The weight ratio of Ti-C mixed powder to W-Si mixed powder in the crucible is (0.8~1.2):1. (3) Place the crucible containing the mixed powder into a sealed reactor, evacuate it, and then fill it with argon gas. Then, use a tungsten wire to energize the mixture to initiate the reaction between the materials. (4) After cooling, remove the reacted material, separate the titanium carbide and TUNGSTEN SILICIDE, and crush them separately to obtain titanium carbide and TUNGSTEN SILICIDE powders. |
| 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. |
|
| Company Name: |
Alfa Aesar
|
| Telephone: |
400-6106006 |
| Website: |
http://chemicals.thermofisher.cn |
| Company Name: |
Energy Chemical
|
| Telephone: |
400-0056266 |
| Website: |
www.energy-chemical.com |
| Company Name: |
Spectrum Chemical Manufacturing Corp.
|
| Telephone: |
021-021-021-67601398-809-809-809 15221380277 |
| Website: |
www.spectrumchemical.com/oa_html/index.jsp?minisite=10020&respid=22372&language=us |
| Company Name: |
klamar reagent
|
| Telephone: |
4001650900 |
| Website: |
www.ziyi-reagent.com |
|