Transparent La2−xGdxZr2O7 ceramics obtained by combustion method and vacuum sintering
| Autor: | Xianpeng Qin, Guohong Zhou, Guangjun Zhang, Yan Yang, Shiwei Wang, Zhengjuan Wang, Yvonne Menke |
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| Rok vydání: | 2014 |
| Předmět: |
Diffraction
Materials science Transparent ceramics High-refractive-index polymer Mechanical Engineering Metals and Alloys Pyrochlore Analytical chemistry Mineralogy engineering.material Combustion Mechanics of Materials visual_art Materials Chemistry engineering visual_art.visual_art_medium Transmittance Ceramic Effective atomic number |
| Zdroj: | Journal of Alloys and Compounds. 585:497-502 |
| ISSN: | 0925-8388 |
| DOI: | 10.1016/j.jallcom.2013.09.187 |
| Popis: | Transparent La 2 − x Gd x Zr 2 O 7 ( x = 0–2.0) ceramics were prepared via vacuum sintering from nanometric powders synthesized by a simple combustion method. The changes of phase composition, morphology and in-line transmittance of the resulting ceramics with Gd 3+ content’s variation were investigated. With the increase of Gd 3+ content, the samples keep the pyrochlore structure, but the X-ray diffraction peaks of the powders and ceramics shift to higher angle as the lattice parameters become smaller. All the ceramics are transparent with high in-line transmittance and high refractive index (2.08 @ 632.8 nm, x = 0.4–1.6). These results indicate that La 2 − x Gd x Zr 2 O 7 ceramics might be used as optical lens. Moreover, with the increase of Gd 3+ content, the effective atomic number and density of the ceramics increase, therefore making them promising host candidates for scintillators. |
| Databáze: | OpenAIRE |
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