Yttrium Oxide, 5 g (Item

Yttrium Oxide, 5 grams. Yttrium oxide is Y₂O₃. It is an air-stable, white solid substance. Yttrium oxide is used as a common starting material for both materials science as well as inorganic compounds. 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: 0.5Y₂O₃ + 2BaO + 3CuO + 0.25O₂ → YBa2Cu3O7 This synthesis is typically conducted at 800 °C. The thermal conductivity of yttrium oxide is 27 W/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 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. Reprinted from Wikipedia; the free encyclopedia.