| 申请日期 | 2025-07-18 | 申请号 | US13849236 |
| 公开（公告）号 | US20130256600A1 | 公开（公告）日 | 2013-10-03 |
| 公开国别 | US | 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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