| Presentation | 2011-01-28 Study on state of Ce in processes of liquid phase synthesis and burning for preparation of Y_3Al_5O_<12>:Ce phosphor Takuro Murakawa, Hiroshi Okura, Tetsuo Honma, Yoshinobu Miyamoto, Koutoku Ohmi, |
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| Abstract(in Japanese) | (See Japanese page) |
| Abstract(in English) | In a phosphor synthesis of Y_3Al_5O_<12>:Ce (YAG:Ce) by a liquid phase reaction method, the state of Ce in precursors, intermediate products and completed phosphors are systematically investigated by X-ray Absorption Fine Structure (XAFS) measurement. It has been found out that Ce is initially trivalent in the precursor. However, most of Ce are oxidized and might be segregated as an amorphous tetravalent cerium oxide from the yttrium compounds by firing in air atmosphere. By contrast, Eu stably remains at Y sites as trivalent even fired in air atmosphere. It concludes that the redox activity of luminescent centers dominates the incorporation of them into host lattices. |
| Keyword(in Japanese) | (See Japanese page) |
| Keyword(in English) | liquid phase reaction / XAFS / YAG:Ce / white LED phosphor |
| Paper # | EID2010-26 |
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| Conference Information | |
| Committee | EID |
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| Conference Date | 2011/1/21(1days) |
| Place (in Japanese) | (See Japanese page) |
| Place (in English) | |
| Topics (in Japanese) | (See Japanese page) |
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| Paper Information | |
| Registration To | Electronic Information Displays (EID) |
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| Language | JPN |
| Title (in Japanese) | (See Japanese page) |
| Sub Title (in Japanese) | (See Japanese page) |
| Title (in English) | Study on state of Ce in processes of liquid phase synthesis and burning for preparation of Y_3Al_5O_<12>:Ce phosphor |
| Sub Title (in English) | |
| Keyword(1) | liquid phase reaction |
| Keyword(2) | XAFS |
| Keyword(3) | YAG:Ce |
| Keyword(4) | white LED phosphor |
| 1st Author's Name | Takuro Murakawa |
| 1st Author's Affiliation | Graduate School of Eng., Tottori University() |
| 2nd Author's Name | Hiroshi Okura |
| 2nd Author's Affiliation | Graduate School of Eng., Tottori University:Merck Ltd. |
| 3rd Author's Name | Tetsuo Honma |
| 3rd Author's Affiliation | Japan Synchrotron Radiation Research Institute |
| 4th Author's Name | Yoshinobu Miyamoto |
| 4th Author's Affiliation | Graduate School of Eng., Tottori University:Tottori Univ. Electronic Display Research Center |
| 5th Author's Name | Koutoku Ohmi |
| 5th Author's Affiliation | Graduate School of Eng., Tottori University:Tottori Univ. Electronic Display Research Center |
| Date | 2011-01-28 |
| Paper # | EID2010-26 |
| Volume (vol) | vol.110 |
| Number (no) | 404 |
| Page | pp.pp.- |
| #Pages | 4 |
| Date of Issue | |