Wolframdiselenid

Bezeichnung:Wolframdiselenid

CAS-Nr12067-46-8

Englisch Name:TUNGSTEN SELENIDE

CBNumberCB5120338

SummenformelSe2W

Molgewicht341.78

MOL-Datei12067-46-8.mol

Synonyma

Wolframdiselenid

Wolframdiselenid physikalisch-chemischer Eigenschaften

Dichte	9.32
RTECS-Nr.	YO7714000
Aggregatzustand	Powder, 10μm
Farbe	gray hexagonal, hexane crystals, crystalline
Wasserlöslichkeit	Insoluble in water.
Expositionsgrenzwerte	ACGIH: TWA 0.2 mg/m3; TWA 3 mg/m3 NIOSH: IDLH 1 mg/m3; TWA 5 mg/m3; TWA 0.2 mg/m3; STEL 10 mg/m3
CAS Datenbank	12067-46-8(CAS DataBase Reference)
EPA chemische Informationen	Tungsten selenide (WSe2) (12067-46-8)

Sicherheit

RIDADR	UN3283 - class 6.1 - PG 3 - EHS - Selenium compound, solid, n.o.s., HI: all (not BR)
TSCA	Yes
HazardClass	9

Gefahreninformationscode (GHS)

TUNGSTEN SELENIDE Chemische Eigenschaften,Einsatz,Produktion Methoden

Chemische Eigenschaften
-325 mesh black powder(s); dry, solid lubricant with exceptional stability at high temperatures, and in high vacuum; used in the form of 99.8% pure material as a sputtering target to produce lubricant films [HAW93] [CER91] [AES93]
Verwenden
Tungsten(IV) selenide is used as an important compound in electrochemical solar cells. It acts as a stable semiconductor.
Verwenden
Owing to the thickness dependent physical and chemical properties, the two dimensional layered inorganic nanomaterials have drawn significant attention recently. They find applications in photocatalysis, phtotovoltaics, gas sensing, lithium ion batteries, field effect transistors, spintronics etc. Transition metal dichalcogenides represent an important class of inorganic 2D materials having aforementioned applications. The CVD grown monolayer films of MoS₂, MoSe₂, WS₂ and WSe₂ on insulating substrates such as SiO₂ and sapphire are well suited for electronic and photovoltaic devices.
Verwenden
The two dimensional layered inorganic nanomaterials have drawn significant attention recently owing to their thickness dependent physical and chemical properties. They find applications in photocatalysis, phtotovoltaics, gas sensing, lithium ion batteries, field effect transistors, spintronics etc. Transition metal dischalcogenides represent an important class of inorganic 2D materials having the aforementioned applications.
Definition
Lamellarstructured, dry, solid lubricant with exceptionally high temperature and high vacuum stability. Retains its lubricity to temperatures as low as ?265C.
Hazard
TLV: 5 mg(W)/m3.
Structure and conformation
Tungsten diselenide, WSe2, has a hexagonal crystalline structure comparable to MoS2. Every tungsten atom is covalently bonded to six selenium ligands in a trigonal prismatic coordination sphere, and each selenium is bonded to three tungsten atoms in a pyramidal geometry. Heating thin films of tungsten under pressure from gaseous selenium and high temperatures ( . 527℃/800K) using the sputter deposition technique leads to the films crystallizing in hexagonal structures with the correct stoichiometric ratio.
W+ 2Se→WSe2

TUNGSTEN SELENIDE Upstream-Materialien And Downstream Produkte

Wolframdiselenid Anbieter Lieferant Produzent Hersteller Vertrieb Händler.

12067-46-8, TUNGSTEN SELENIDE Verwandte Suche:

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