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TUNGSTEN SILICIDE

Basic information Safety Supplier Related

TUNGSTEN SILICIDE Basic information

Product Name:
TUNGSTEN SILICIDE
Synonyms:
  • TUNGSTEN SILICIDE
  • TUNGSTEN DISILICIDE
  • TUNGSTEN SILICIDE, -325 MESH
  • TUNGSTEN SILICIDE (99.7%-W)
  • TUNGSTEN SILICIDE, 99.995% (METALS BASIS EXCLUDING MO), MO <
  • Tungsten silicide, 99.995% (metals basis excluding Mo), Mo <20ppm
  • Tungsten silicide, 99.5% (metals basis)
  • TUNGSTEN SILICIDE, 99%TUNGSTEN SILICIDE, 99%TUNGSTEN SILICIDE, 99%
CAS:
12039-88-2
MF:
Si2W
MW:
240.01
EINECS:
234-909-0
Product Categories:
  • Ceramics
  • Metal and Ceramic Science
  • Silicides
Mol File:
12039-88-2.mol
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TUNGSTEN SILICIDE Chemical Properties

Melting point:
2165°C
Density 
9,88 g/cm3
solubility 
insoluble in H2O
form 
Powder
Specific Gravity
9.88
color 
blue-gray tetragonal crystals, crystalline
Resistivity
33.4 (ρ/μΩ.cm)
Water Solubility 
Insoluble in water.
Hydrolytic Sensitivity
2: reacts with aqueous acid
Crystal Structure
Tetragonal
Exposure limits
ACGIH: TWA 3 mg/m3
NIOSH: TWA 5 mg/m3; STEL 10 mg/m3
CAS DataBase Reference
12039-88-2
EPA Substance Registry System
Tungsten silicide (WSi2) (12039-88-2)
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Safety Information

Safety Statements 
22
WGK Germany 
3
TSCA 
Yes

MSDS

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TUNGSTEN SILICIDE Usage And Synthesis

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.

Uses

Oxidation-resistant coatings, electrical resistance and refractory applications.

Uses

Tungsten silicide is used in microelectronics as a contact material. It is also used as a shunt over polysilicon lines to increase their conductivity and increase signal speed. Further, it acts as a barrier layer between silicon and other metals. In addition to this, it is used in microelectro mechanical systems and for oxidation-resistant coatings. It is also employed as a replacement for earlier tungsten films.

Hazard

Dust flammable.

TUNGSTEN SILICIDESupplier

Meryer (Shanghai) Chemical Technology Co., Ltd.
Tel
021-61259108 18621169109
Email
market03@meryer.com
3B Pharmachem (Wuhan) International Co.,Ltd.
Tel
821-50328103-801 18930552037
Email
3bsc@sina.com
Alfa Aesar
Tel
400-6106006
Email
saleschina@alfa-asia.com
Beijing HwrkChemical Technology Co., Ltd
Tel
010-89508211 18501085097
Email
sales.bj@hwrkchemical.com
BeiJing Hwrk Chemicals Limted
Tel
0757-86329057 18934348241
Email
sales4.gd@hwrkchemical.com