What is Yttrium(III) oxide used for?

Yttrium(III) oxide is Y2O3. It is an air-stable, white solid substance. Yttrium oxide is acclimated as a accepted starting actual for both abstracts science as able-bodied as asleep compounds.
Uses
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.
Y2O3 is used to make the high temperature superconductor YBa2Cu3O7, known as "1-2-3" to indicate the ratio of the metal constituents
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.
Yttrium(III) oxide is a prospective solid-state 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 emission at laser frequency and avalanche broadband emission takes place.
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