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Wolframdisilicid

TUNGSTEN SILICIDE Struktur
12039-88-2
CAS-Nr.
12039-88-2
Bezeichnung:
Wolframdisilicid
Englisch Name:
TUNGSTEN SILICIDE
Synonyma:
TUNGSTEN SILICIDE;TUNGSTEN DISILICIDE;tungsten(IV) silicide;TUNGSTEN SILICIDE (99.7%-W);TUNGSTEN SILICIDE, -325 MESH;TUNGSTEN SILICIDE ISO 9001:2015 REACH;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;TUNGSTEN SILICIDE, 99%TUNGSTEN SILICIDE, 99%TUNGSTEN SILICIDE, 99%
CBNumber:
CB0307758
Summenformel:
Si2W
Molgewicht:
240.01
MOL-Datei:
12039-88-2.mol

Wolframdisilicid Eigenschaften

Schmelzpunkt:
2165°C
Dichte
9,88 g/cm3
L?slichkeit
insoluble in H2O
Aggregatzustand
Powder
Wichte
9.88
Farbe
blue-gray tetragonal crystals, crystalline
Widerstand (resistivity)
33.4 (ρ/μΩ.cm)
Wasserl?slichkeit
Insoluble in water.
Hydrolytic Sensitivity
2: reacts with aqueous acid
Crystal Structure
Tetragonal
Expositionsgrenzwerte
ACGIH: TWA 3 mg/m3
NIOSH: TWA 5 mg/m3; STEL 10 mg/m3
CAS Datenbank
12039-88-2
EPA chemische Informationen
Tungsten silicide (WSi2) (12039-88-2)

Sicherheit

S-S?tze: 22
WGK Germany  3
TSCA  Yes

Wolframdisilicid Chemische Eigenschaften,Einsatz,Produktion Methoden

S-S?tze Betriebsanweisung:

S22:Staub nicht einatmen.

Beschreibung

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. 

Chemische Eigenschaften

Blue-gray, very hard solid. Insoluble in water; attacked by fused alkalies and mixture of nitric and hydrofluoric acids.

Verwenden

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.

Wolframdisilicid Upstream-Materialien And Downstream Produkte

Upstream-Materialien

Downstream Produkte


Wolframdisilicid Anbieter Lieferant Produzent Hersteller Vertrieb H?ndler.

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12039-88-2(Wolframdisilicid)Verwandte Suche:


  • 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%
  • TUNGSTEN SILICIDE ISO 9001:2015 REACH
  • tungsten(IV) silicide
  • 12039-88-2
  • WSi2
  • Ceramics
  • Metal and Ceramic Science
  • Silicides
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