2004年10月
Morphology control of phase-separation-induced alumina-silica macroporous gels for rare-earth-doped scattering media
JOURNAL OF PHYSICAL CHEMISTRY B
- ,
- ,
- ,
- 巻
- 108
- 号
- 43
- 開始ページ
- 16670
- 終了ページ
- 16676
- 記述言語
- 英語
- 掲載種別
- 研究論文(学術雑誌)
- DOI
- 10.1021/jp0481658
- 出版者・発行元
- AMER CHEMICAL SOC
Phase-separation behavior in the sol-gel system of alumina-silica (Al2O3-SiO2) in the presence of poly (ethylene oxide) has been investigated. Amorphous gels with interconnected macropores can be obtained from the starting composition containing up to 10 mol % Al3+ by inducing phase separation parallel to the sol-gel transition. SmCl3.6H(2)O is added to the present system to yield Sm3+-doped macroporous gels. The sintered Al2O3-SiO2 macroporous glasses doped with Sm3+ exhibit the photoluminescence due to the 4f-4f transition of Sm3+, and the intensity of fluorescence increases with increasing Al3+ content. The reduction of Sm3+ to Sm2+ is accomplished in Al2O3-SiO2 macroporous glasses by heat treatment in a reducing atmosphere.
- リンク情報
- ID情報
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- DOI : 10.1021/jp0481658
- ISSN : 1520-6106
- Web of Science ID : WOS:000224685600013