Ditantalpentaoxid

Bezeichnung:Ditantalpentaoxid

CAS-Nr1314-61-0

Englisch Name:Tantalum pentoxide

CBNumberCB1282629

SummenformelO5Ta2

Molgewicht441.89

MOL-Datei1314-61-0.mol

Synonyma

Ditantalpentaoxid

Ditantalpentaoxid physikalisch-chemischer Eigenschaften

Schmelzpunkt

1872 °C

Dichte

8.2 g/mL at 25 °C(lit.)

storage temp.

Sealed in dry,Room Temperature

Löslichkeit

insoluble in H2O, ethanol, acid solutions; sHF

Aggregatzustand

lumps

Farbe

White to white-beige

Wichte

8.2

Widerstand (resistivity)

1.0 ∞ 10*12 (ρ/μΩ.cm)

Wasserlöslichkeit

Insoluble in water.

Crystal Structure

Trigonal

Merck

14,9056

crystal system

Nogata

Space group

Pmm2

Lattice constant

a/nm	b/nm	c/nm	α/o	β/o	γ/o	V/nm3
0.3888	4.029	0.6198	90	90	90	0.9709

Dielectric constant

11.6（Ambient）

Expositionsgrenzwerte

OSHA: TWA 5 mg/m3
NIOSH: IDLH 2500 mg/m3; TWA 5 mg/m3; STEL 10 mg/m3

InChI

InChI=1S/5O.2Ta

InChIKey

PBCFLUZVCVVTBY-UHFFFAOYSA-N

Sicherheit

Kennzeichnung gefährlicher	Xi
R-Sätze:	36/37/38
S-Sätze:	37/39-26
WGK Germany	-
RTECS-Nr.	WW5855000
TSCA	Yes
HS Code	28259085
Toxizität	LD50 orally in rats: 8000 mg/kg (Cochran)

Gefahreninformationscode (GHS)

Tantalum pentoxide Chemische Eigenschaften,Einsatz,Produktion Methoden

R-Sätze Betriebsanweisung:
R36/37/38:Reizt die Augen, die Atmungsorgane und die Haut.
S-Sätze Betriebsanweisung:
S37/39:Bei der Arbeit geeignete Schutzhandschuhe und Schutzbrille/Gesichtsschutz tragen.
S26:Bei Berührung mit den Augen sofort gründlich mit Wasser abspülen und Arzt konsultieren.
Chemische Eigenschaften
white to white-beige powder
Chemische Eigenschaften
Tantalum pentoxide, Ta2O5, is a white powder existing in two thermodynamically stable modifications. The orthorombic b-phase changes at 1,360 °C (2,480 °F) into the tetragonal a-modification. The existence of an e-modification has also been reported. Tantalum pentoxide reacts slowly with hot hydrofluoric acid but is insoluble in water and in most solutions of acids and alkalies. For analytical purposes, it can be dissolved by fusion with alkali hydroxides, alkali carbonates, and potassium pyrosulfate.
Physikalische Eigenschaften
White orthorhombic crystal or powder; density 8.20 g/cm³; melts at 1,785°C; insoluble in water, ethanol and practically all acids; soluble in hydrofluoric acid; solubilized by fusion with caustic potash or potassium hydrogen sulfate.
Physikalische Eigenschaften
Dielectric used in film supercapacitors. Tantalum oxide is a high-refractiveindex, low-absorption material used in making optical coatings in the near-UV (350 nm) to IR (8 μm). Insoluble in most chemicals except HF, HF-HNO₃ mixtures, oleum, fused alkali hydroxides (e.g., NaOH, KOH), and molten pyrosulfates.
Verwenden
Tantalum pentoxide is used in making high refractive index optical glass; as a dielectric film on tantalum for its use as a capacitor component and rectifier; and for preparing tantalum metal, its carbide, and many other tantalum compounds.
Verwenden
Tantalum pentoxide (Ta2O5) is used to make special optical glass, for lasers, and in electronic circuits.
Verwenden
Tantalum oxide is used to make optical glass for lenses and in electronic circuits.
synthetische
Tantalum pentoxide is obtained as an intermediate in extracting tantalum from the columbite-tantalite series of minerals. Also, the oxide can be made by heating Ta metal in oxygen or air at elevated temperatures.
Allgemeine Beschreibung
Tantalum pentoxide is dielectric in nature making it useful for making capacitors in the electronics industry.
Hazard
TLV: 5 mg/m3.
Flammability and Explosibility
Non flammable
Sicherheitsprofil
Mildly toxic by ingestion. Incompatible with ClF3, BrF3, Li. See also TANTALUM.

Tantalum pentoxide Upstream-Materialien And Downstream Produkte

Ditantalpentaoxid Anbieter Lieferant Produzent Hersteller Vertrieb Händler.

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