Development of SiAlON - From Mechanical to Optical Applications
| Autor: | Tetsuo Yamada, Takeshi Yamao, Shin-Ichi Sakata |
|---|---|
| Rok vydání: | 2007 |
| Předmět: |
Sialon
Ytterbium Ionic radius Photoluminescence Materials science Mechanical Engineering Oxide chemistry.chemical_element Phosphor Amorphous solid chemistry.chemical_compound chemistry Mechanics of Materials visual_art visual_art.visual_art_medium General Materials Science Ceramic Composite material |
| Zdroj: | Key Engineering Materials. 352:173-178 |
| ISSN: | 1662-9795 |
| DOI: | 10.4028/www.scientific.net/kem.352.173 |
| Popis: | Various rare-earth-doped α-SiAlON powders with high purity were prepared to study mechanical and optical properties of SiAlON-based functional materials in connection with ionic radius and electronic structure of rare-earth elements. Single phase rare-earth-doped α-SiAlON powders were obtained at a temperature as low as 1873 K by heating powder mixtures of rare-earth oxide, AlN and highly active ultrafine amorphous Si3N4. Bending strength of highly dense rare-earth-doped α/β-SiAlON-based ceramics was increased with decreasing radii of rare-earth ions, i.e., Yb-SiAlON-based ceramics exhibited excellent high-temperature strength and oxidation resistance caused by the small ionic radius of ytterbium. As for optical application, α-SiAlON is an excellent host lattice with good thermal and chemical stability for doping rare-earth element which activates photoluminescence. Europium-doped Ca-α-SiAlON phosphor formulated as CaxEuy(Si,Al)12(O,N)16 (where 0 |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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