Yttrium oxide Chemical Properties

Melting point:

2410 °C

Boiling point:

81-83 °C

Density 

5.01 g/mL at 25 °C(lit.)

Flash point:

12 °C

storage temp. 

no restrictions.

solubility 

soluble in dilute acid solutions

form 

nanopowder

Specific Gravity

5.01

color 

White

PH

10±1

Water Solubility 

Insoluble

Sensitive 

Air Sensitive

Crystal Structure

Trigonal

Merck 

14,10107

Exposure limits

ACGIH: TWA 1 mg/m3
NIOSH: IDLH 500 mg/m3; TWA 1 mg/m3

InChIKey

SIWVEOZUMHYXCS-UHFFFAOYSA-N

CAS DataBase Reference

1314-36-9(CAS DataBase Reference)

EPA Substance Registry System

Yttrium oxide (Y2O3) (1314-36-9)

Safety Information

Hazard Codes 

Xi,F

Risk Statements 

36/37/38-67-36/37-36-11

Safety Statements 

26-36-37/39-16

RIDADR 

UN1950

WGK Germany 

1

RTECS 

ZG3850000

F 

3-9

TSCA 

Yes

HazardClass 

2.1

HS Code 

28469011

Toxicity

mouse,LD50,intraperitoneal,430mg/kg (430mg/kg),"Toxicometric Parameters of Industrial Toxic Chemicals Under Single Exposure," Izmerov, N.F., et al., Moscow, Centre of International Projects, GKNT, 1982Vol. -, Pg. 121, 1982.

MSDS

• Language:English Provider:ACROS
• Language:English Provider:SigmaAldrich
• Language:English Provider:ALFA

Yttrium oxide Usage And Synthesis

Physical Properties

White powder; body-centered cubic structure; density 5.03 g/cm3; melts at 2,436°C; insoluble in water; soluble in dilute acids.

Uses

Yttrium Oxide, also called Yttria, high purity Yttrium Oxides are the most important materials for tri-bands Rare Earth phosphors which give the red colour in colour television & computer tubes. In optical industry, the Yttrium Oxide is used to produce Yttrium-Iron-Garnets, which are very effective microwave filters. Low purity of Yttrium Oxide are widely applied in electronic ceramics. It is widely used to make Eu:YVO4 and Eu:Y2O3 phosphors that give the red color in color TV picture tubes.
Also, it is used in gas mantles and acetylene lights. Other uses are in yttriumiron garnets for microwave filters in lasers, and as a stabilizer for high temperature in refractories.

Preparation

Yttrium oxide is produced as an intermediate in recovery of yttrium from xenotime and monazite (See Yttrium, Recovery). The oxide is produced after separation of rare earth sulfates obtained from digesting the mineral with sulfuric acid on a cation exchange bed, precipitating yttrium fraction as oxalate, and igniting the oxalate at 750°C.
Yttrium oxide also may be obtained by thermal decomposition of yttrium nitrate.

Chemical Properties

white powder(s) or sintered tablets and pieces of 99.9% purity; bcc; readily absorbs atmospheric CO2; enthalpy of fusion 105.00 kJ/mol; used in crucible form for experimental, proprietary melting, also sintered pieces used as evaporation material for hard film dielectric coating and thin film capacitors, and as 99.999%, 99.99%, 99.9% pure sputtering target for preparing hard films, dielectric coatings, and thin film capacitor [CER91] [MER06] [CRC10]

Physical properties

Yttrium oxide is a medium-refractiveindex, low-absorption material used for optical coating in the near-UV (300 nm) to IR (12 μm) regions and hence used to protect Al and Ag mirrors. Used for crucibles containing molten lithium.

Uses

Uses

Yttrium oxide is an excellent mineralizing agent for spinel formation. Yttrium oxide is used as a common starting material for both materials science as well as inorganic compounds. Provides easy application of uniform, thin, protective high temperature Yttrium Oxide coatings. Yttrium Oxide is used to produce Yttrium-Iron-Garnets, which are very effective microwave filters. Low purity of Yttrium Oxide are widely applied in electronic ceramics. Yttrium Oxide is also used to make Yttrium-Iron-Garnets, which are very effective microwave filters.

Uses

Yttrium oxide was used in the preparation of pervoskite type structure, YAlO₃, containing chrome ions.1 The effect of yttrium oxide dopant on the phase formation and sintering characteristics was studied. It may be used in the manufacturing of neodymium Nd:YAG lasers and in components of MOS and LED transistors.

General Description

Yttrium oxide is an excellent mineralizing agent for spinel formation. It has a high melting point(2450^oC), chemical stability, low coefficient of thermal expansion, high transparency for both visible (70%) and infrared (60%) light, low cut off energy of photons.

Flammability and Explosibility

Non flammable

Safety Profile

A poison by intraperitoneal route. See also YTTRIUM and RARE EARTHS.

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