| 单词 | yttrium (Y) |
| 释义 | yttrium (Y) A rare trivalent, silvery, metallic chemical element used in various alloys and to make the red color phosphors in cathode ray tubes (CRTs).Yttrium also is used in YAG/LED (Yttrium Aluminum Garnet/Light-Emitting Diode) light sources. Number 39 in the Periodic Table of Elements, yttrium is named for the village of Ytterby, Sweden, where it was discovered. So were erbium, ytterbium, and terbium. See also erbium, LED, television, YAG/LED, and Ytterby. |
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