Lanthanoxyd

Bezeichnung:Lanthanoxyd

CAS-Nr1312-81-8

Englisch Name:Lanthanum oxide

CBNumberCB7464647

SummenformelLa2O3

Molgewicht325.81

MOL-Datei1312-81-8.mol

Synonyma

Lanthanoxyd

Lanthanoxyd physikalisch-chemischer Eigenschaften

Schmelzpunkt

2315 °C

Siedepunkt

4200 °C

Dichte

6.51 g/mL at 25 °C(lit.)

Flammpunkt

4200°C

storage temp.

no restrictions.

Löslichkeit

insoluble in H2O; soluble in dilute acid solutions

Aggregatzustand

nanopowder

Farbe

White to yellow

Wichte

6.51

9.0 (50g/l, H2O, 20℃)(slurry)

Widerstand (resistivity)

1 ∞ 10*14 (550°C) (ρ/μΩ.cm)

Wasserlöslichkeit

INSOLUBLE

Sensitive

Hygroscopic

Crystal Structure

Trigonal

crystal system

Three sides

Merck

14,5363

Space group

P3m1

Lattice constant

a/nm	b/nm	c/nm	α/o	β/o	γ/o	V/nm3
0.394	0.394	0.613	90	90	120	0.0824

Sicherheit

Kennzeichnung gefährlicher	Xi
R-Sätze:	36/37/38-36
S-Sätze:	26-36-39
WGK Germany	1
RTECS-Nr.	OE5330000
TSCA	Yes
HS Code	28469000
Toxizität	LD50 orally in Rabbit: > 9968 mg/kg

Gefahreninformationscode (GHS)

Lanthanum oxide Chemische Eigenschaften,Einsatz,Produktion Methoden

R-Sätze Betriebsanweisung:
R36/37/38:Reizt die Augen, die Atmungsorgane und die Haut.
R36:Reizt die Augen.
S-Sätze Betriebsanweisung:
S26:Bei Berührung mit den Augen sofort gründlich mit Wasser abspülen und Arzt konsultieren.
S36:DE: Bei der Arbeit geeignete Schutzkleidung tragen.
S39:Schutzbrille/Gesichtsschutz tragen.
Chemische Eigenschaften
Lanthanum oxide is an oxide of lanthanum (III), white orthorhombic or amorphous powder. Soluble in acid, ethanol, ammonium chloride, insoluble in water, ketone. It is mainly used in the manufacture of precision optical glass and optical fiber.
Verwenden
Lanthanum oxide is used to make high-quality glass, ceramics, carbon-arc electrodes, and fluorescent lamps. Lanthanum (III) oxide was used as an analytical standard in inductively coupled plasma atomic emission spectrometry (ICP-AES) for chemical characterization of ancient pottery.
Verwenden
Lanthanum(III) oxide is used as a precursor to LAMOX fast ion conductors and superconductors. It is also used in the manufacture of optical glasses, piezoelectric and thermoelectric material. It is also useful for X-ray imaging intensifying screens, phosphors as well as dielectric and conductive ceramics. In addition, it is used as a catalyst to effect certain organic transformations. It is one of the active ingredients and finds application in thermoelectric and piezoelectric materials.
Application
Lanthanum Oxide, also called Lanthana, high purity Lanthanum Oxide (99.99% to 99.999%) is applied in making special optical glasses to improves the alkali resistance of glass, and is used in La-Ce-Tb phosphors for fluorescent lamps and making special optical glasses, such as infrared-absorbing glass, as well as camera and telescope lenses, Low grade of Lanthanum Oxide is widely used in ceramics and FCC catalyst, and also as raw material for Lanthanum Metal production; Lanthanum Oxide is also used as a grain growth additive during the liquid phase sintering of Silicon Nitride and Zirconium Diboride.
synthetische
Lanthanum oxide can be produced by direct combustion of lanthanum in oxygen or air. The oxide also may be prepared by decomposition of an oxo salt of lanthanum, such as nitrate, sulfate, carbonate, hydroxide or oxalate.
La(CO₃)₃•8H₂O → La₂O₃ + 3CO₂ + 8H₂O
2La₂(C₂O₄)₃•9H₂O + 3O₂ → 2La₂O₃ + 12CO₂ + 18H₂O
Allgemeine Beschreibung
Lanthanum (III) oxide is an alkaline earth oxide, and is a diamagnetic, isostructural analog of neodymium oxide. It is also an efficient recyclable catalyst, and can be used in coupling various aryl halides with aromatic/alkyl thiols.
Flammability and Explosibility
Non flammable
Industrielle Verwendung
Lanthanum oxide (La₂O₃) has a melting pointof 2250°C, is soluble in acids, and very slightlysoluble in water. This oxide of a rare earth elementoccurs in monazite and bastnasite. It ismarketed as the oxide or as other salts such asthe oxalate, nitrate, or hydrate. It quicklyabsorbs water and CO₂ from the atmosphere.Its chief use is as an ingredient in nonsilica,rare element optical glass with oxides of tungsten, tantalum, and thorium. Lanthanumincreases refractive index, decreases dispersion,and is also used in x-ray image intensifyingscreens that speed up x-ray exposure asmuch as two to ten times so that diagnosticdosages may be reduced by as much as 80%with fewer retakes. It is also used in bariumtitanate capacitors.

Lanthanum oxide Upstream-Materialien And Downstream Produkte

Lanthanoxyd Anbieter Lieferant Produzent Hersteller Vertrieb Händler.

1312-81-8, Lanthanum oxide Verwandte Suche:

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