| 申请日期 | 2025-07-08 | 申请号 | EP02711378 |
| 公开（公告）号 | EP1380675B1 | 公开（公告）日 | 2012-06-20 |
| 公开国别 | EP | 申请人省市代码 | 全国 |
| 申请人 | Stella Chemifa Kabushiki Kaisha | ||
| 简介 | To provide a method for reducing oxygen and carbon components in high-purity fluoride such as calcium fluoride and barium fluoride (high-purity fluoride is not limited to calcium fluoride and barium fluoride), or in rare-earth fluoride such as ytterbium fluoride and cerium fluoride used for an optical fiber, a coating material, and so on. It is characterized in that the oxygen and carbon components contained in the high-purity fluoride are reduced by a fluorine gas treatment. | ||
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