| 申请日期 | 2025-06-25 | 申请号 | EP13160918 |
| 公开（公告）号 | EP2644581A1 | 公开（公告）日 | 2013-10-02 |
| 公开国别 | EP | 申请人省市代码 | 全国 |
| 申请人 | Shin Etsu Chemical Co Ltd | ||
| 简介 | An oxide ceramic fluorescent material is provided comprising a polycrystalline ceramic sintered body of Y3Al5O12, Lu3Al5O12, (Y, Lu)3Al5O12, (Y, Gd)3Al5O12, or Al2O3 in which a rare earth element selected from Ce, Eu and Tb has been diffused from its surface as fluorescent activator. The concentration of the rare earth element is 1 wt% at a depth of 50-600 µm as measured from the sintered body surface and at least 1 wt% at any position nearer to the sintered body surface. | ||
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