é“•(Eu) basic knowledge introduction

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In 1901, De Makai (Eugene-Antole Demarcay) found a new element from the "SM", the name for the Eu (Europium). This is probably named after the word "Europe". Most of cerium oxide is used in phosphors. Eu3+ is used as an activator for red phosphors and Eu2+ is used for blue phosphors. Now Y2O2S: Eu3+ is the best phosphor for luminous efficiency, coating stability, and recycling cost. In addition, improvements in technologies such as improved luminous efficiency and contrast are being widely used. In recent years, cerium oxide has also been used in stimulated emission phosphors of new X-ray medical diagnostic systems. Cerium oxide can also be used to make colored lenses and optical filters for use in magnetic bubble storage devices, and can also be used in control materials, screen materials and structural materials for atomic reactors.

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