Yttrium oxide, also called Yttrium (III) oxide and Yttria, is a white solid substance that is stable in the air. High-purity Yttrium Oxides are the most important materials for tri-band Rare Earth phosphors which give the red color in color television & computer tubes.
In the optical industry, Yttrium Oxide is used to produce Yttrium-Iron-Garnets, which are very effective microwave filters. Low purity of Yttrium Oxide is 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. Yttrium Oxide is also used to make Yttrium-Iron-Garnets, which are very effective microwave filters.
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