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Yttrium(III) oxide

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Title: Yttrium(III) oxide  
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Subject: Yttrium, Oxides, Yttria-stabilized zirconia, Yttrium barium copper oxide, Redirects for discussion/Log/2015 June 8
Collection: Inorganic Compounds, Oxides, Sesquioxides, Yttrium Compounds
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Yttrium(III) oxide

Yttrium(III) oxide
Yttrium(III) oxide
Names
IUPAC name
Yttrium(III) oxide.
Other names
Yttria,
diyttrium trioxide,
yttrium sesquioxide
Identifiers
 Y
RTECS number ZG3850000
Properties
Y2O3
Molar mass 225.81 g/mol
Appearance White solid.
Density 5.010 g/cm3, solid
Melting point 2,425 °C (4,397 °F; 2,698 K)
Boiling point 4,300 °C (7,770 °F; 4,570 K)
insoluble
Solubility in alcohol
acid
soluble
Structure
Cubic (bixbyite), cI80[1]
Ia-3, No. 206
Octahedral
Hazards
None listed.
R-phrases Not hazardous
S-phrases S24/25
Lethal dose or concentration (LD, LC):
>10,000 mg/kg (rat, oral)
>6000 mg/kg (mouse, oral)[2]
Related compounds
Other cations
Scandium(III) oxide,
Lanthanum(III) oxide
Related compounds
Yttrium barium
copper oxide
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
 Y  (: Y/N?)

Yttrium oxide, also known as yttria, is inorganic compounds.

Contents

  • Uses 1
    • Materials science 1.1
    • Inorganic synthesis 1.2
    • Lasers 1.3
  • References 2
  • External links 3

Uses

Materials science

It is the most important yttrium compound and is widely used to make Eu:YVO4 and Eu:Y2O3 phosphors that give the red color in color TV picture tubes. Yttrium oxide is also used to make yttrium iron garnets, which are very effective microwave filters.

Y2O3 is used to make the high temperature superconductor YBa2Cu3O7, known as "1-2-3" to indicate the ratio of the metal constituents:

2 Y2O3 + 8 BaO + 12 CuO + O2 → 4 YBa2Cu3O7

This synthesis is typically conducted at 800 °C.

The thermal conductivity of yttrium oxide is 27 W/(m·K).[3]

Inorganic synthesis

Yttrium oxide is an important starting point for inorganic compounds. For organometallic chemistry it is converted to YCl3 in a reaction with concentrated hydrochloric acid and ammonium chloride.

Lasers

Y2O3 is a prospective solid-state laser material. In particular, lasers with ytterbium as dopant allow the efficient operation both in continuous operation[4] and in pulsed regimes.[5] At high concentration of excitations (of order of 1%) and poor cooling, the quenching of emission at laser frequency and avalanche broadband emission takes place.[6]

References

  1. ^ Yong-Nian Xu; Zhong-quan Gu; W. Y. Ching (1997). "Electronic, structural, and optical properties of crystalline yttria". Phys. Rev. B56 (23): 14993–15000.  
  2. ^ "Yttrium compounds (as Y)". Immediately Dangerous to Life and Health.  
  3. ^ P. H. Klein and W. J. Croft (1967). "Thermal conductivity , Diffusivity, and Expansion of Y2O3, Y3Al5O12, and LaF3 in the Range 77-300 K".  
  4. ^ J. Kong; D.Y.Tang; B. Zhao; J.Lu; K.Ueda; H.Yagi; T.Yanagitani (2005). "9.2-W diode-pumped Yb:Y2O3 ceramic laser". Applied Physics Letters 86 (16): 161116.  
  5. ^ M.Tokurakawa; K.Takaichi; A.Shirakawa; K.Ueda; H.Yagi; T.Yanagitani; A.A. Kaminskii (2007). "Diode-pumped 188 fs mode-locked Yb3+:Y2O3 ceramic laser". Appl.Phys.Lett. 90 (7): 071101.  
  6. ^ J.-F.Bisson; D.Kouznetsov; K.Ueda; S.T.Fredrich-Thornton; K.Petermann; G.Huber (2007). "Switching of emissivity and photoconductivity in highly doped Yb3+:Y2O3 and Lu2O3 ceramics". Appl.Phys.Lett. 90 (20): 201901.  

External links

  • Yttrium oxide information at Webelements.


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