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透光性ナノ構造γ-Al2O3の熱処理による光学特性変化
http://hdl.handle.net/10191/30430
http://hdl.handle.net/10191/30430e210b5f9-145c-4997-8d29-ea7e2a43c52a
| 名前 / ファイル | ライセンス | アクション |
|---|---|---|
110_12_1062-1066.pdf (544.1 kB)
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| Item type | 学術雑誌論文 / Journal Article(1) | |||||
|---|---|---|---|---|---|---|
| 公開日 | 2014-11-18 | |||||
| タイトル | ||||||
| タイトル | 透光性ナノ構造γ-Al2O3の熱処理による光学特性変化 | |||||
| タイトル | ||||||
| タイトル | 透光性ナノ構造γ-Al2O3の熱処理による光学特性変化 | |||||
| 言語 | en | |||||
| 言語 | ||||||
| 言語 | jpn | |||||
| キーワード | ||||||
| 主題Scheme | Other | |||||
| 主題 | Nanostructure | |||||
| キーワード | ||||||
| 主題Scheme | Other | |||||
| 主題 | Rayleigh scattering | |||||
| キーワード | ||||||
| 主題Scheme | Other | |||||
| 主題 | Alumina | |||||
| キーワード | ||||||
| 主題Scheme | Other | |||||
| 主題 | CVD | |||||
| キーワード | ||||||
| 主題Scheme | Other | |||||
| 主題 | Nano-particle | |||||
| キーワード | ||||||
| 主題Scheme | Other | |||||
| 主題 | Translucent ceramics | |||||
| キーワード | ||||||
| 主題Scheme | Other | |||||
| 主題 | Sintering | |||||
| キーワード | ||||||
| 主題Scheme | Other | |||||
| 主題 | Grain growth | |||||
| 資源タイプ | ||||||
| 資源 | http://purl.org/coar/resource_type/c_6501 | |||||
| タイプ | journal article | |||||
| その他のタイトル | ||||||
| その他のタイトル | Dependence of Optical Properties on Annealing Process of Transparent Nano-Structured γ-Al2O3 Ceramics | |||||
| 著者 |
野田, 弘之
× 野田, 弘之× 金, 煕濬 |
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| 著者別名 | ||||||
| 識別子Scheme | WEKO | |||||
| 識別子 | 43931 | |||||
| 姓名 | Noda, Hiroyuki | |||||
| 著者別名 | ||||||
| 識別子Scheme | WEKO | |||||
| 識別子 | 43932 | |||||
| 姓名 | Kim, Hee Joon | |||||
| 抄録 | ||||||
| 内容記述タイプ | Abstract | |||||
| 内容記述 | Nano-structured γ-Al2O3 ceramics have been pelletized under a pressure of 2.5 GPa on uniaxial compaction of nano-size particles. Although the obtained γ-Al2O3 ceramics show low density, they have a good transparency. For estimating the influence of particle size on the transparency of nano-structured γ-Al2O3 ceramics, nano-sized particles with four different sizes have been used. Nano-structured γ-Al2O3 ceramics made of particles whose size is < 10 nm show a transmittance above 40%. Transmittance decreases with increasing particle diameter. In the case of particle size >20 nm the transmittance is less than 20%. This phenomenon is explained by Rayleigh scattering, which is applicable to a particle diameter much smaller than the wavelength of the incident light. The change in transmittance of nano-structured alumina ceramics on heat treatment is not observed below 1123 K. However the transmittance remarkably decreases at above 1223 K because of rapid grain growths with phase transition, although this temperature is 250 K lower than the γ->α-phase transition temperature (1473 K) of bulk alumina. When the sample produced from 11.2 nm particles was heat-treated at 1173 K, the transmittance was maintained for 2 h and then decreased with increasing the annealing time. At this time, the transmittance slowly decreased with gram growth without phase transition between 2 h and 6 h, and then it steeply decreased with grain growth after 6 h with phase transition. | |||||
| 書誌情報 |
日本セラミックス協会学術論文誌 en : 日本セラミックス協会学術論文誌 巻 110, 号 12, p. 1062-1066, 発行日 2002-12 |
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| 出版者 | ||||||
| 出版者 | 日本セラミックス協会 | |||||
| ISSN | ||||||
| 収録物識別子タイプ | ISSN | |||||
| 収録物識別子 | 09145400 | |||||
| 書誌レコードID | ||||||
| 収録物識別子タイプ | NCID | |||||
| 収録物識別子 | AN10040326 | |||||
| 権利 | ||||||
| 権利情報 | Copyright(C)2002 日本セラミックス協会 | |||||
| 著者版フラグ | ||||||
| 値 | publisher | |||||
