yttrium oxide

Yttrium(III) oxide

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Yttrium oxide is Y2O3. It is an air-stable, white substance. Yttrium oxide is used as a common starting material for both materials science as well as inorganic compounds.

Uses

In materials science

It is the most important yttrium compound and is widely used to make YVO4 europium and Y2O3 europium 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.

In its most important application, Y2O3 is used to make the high temperature superconductor YBa2Cu3O7, known As "1-2-3" to indicate the ratio of the metal constituents:

0.5Y2O3 + 2BaO + 3CuO + 0.25O2 → YBa2Cu3O7

This synthesis is typically conducted At 800 °C.

The thermal conductivity of yttrium oxide was measured As 27W/m/K.

In 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.

In lasers

Y2O3 ceramics is a prospective laser material. In particular, lasers with Ytterbium as dopant allow the efficient operation both in cw operation and in pulsed regimes. At high concentration of excitations (of order of 1%) and poor cooling, the quenching of emisison at laser frequency and avalanche broadband emission takes place.

References

External links

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