Rapid synthesis of Nd-doped Y3Fe5O12 garnet waste forms by microwave sintering
| Autor: | Baoliang Xu, Tao Duan, Jian Liu, Shengtai Zhang, Shiyin Ji, Jianjun Ma, Yi Ding, Shilin Luo, Lingkun Wang, Ling Zhang |
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| Rok vydání: | 2021 |
| Předmět: |
010302 applied physics
Materials science Scanning electron microscope Process Chemistry and Technology Analytical chemistry Yttrium iron garnet Sintering 02 engineering and technology 021001 nanoscience & nanotechnology Microstructure 01 natural sciences Surfaces Coatings and Films Electronic Optical and Magnetic Materials chemistry.chemical_compound chemistry visual_art 0103 physical sciences Materials Chemistry Ceramics and Composites visual_art.visual_art_medium Relative density Ceramic Solubility 0210 nano-technology Electron backscatter diffraction |
| Zdroj: | Ceramics International. 47:21924-21933 |
| ISSN: | 0272-8842 |
| DOI: | 10.1016/j.ceramint.2021.04.210 |
| Popis: | The garnet structure is a promising solid material for nuclear waste because it can contain all kinds of actinides. Yttrium iron garnet Y3Fe5O12 (YIG) is the model component of this kind of substitute. In this study, Nd-doped YIG ceramic samples were prepared by microwave sintering at different sintering temperatures (1100 °C, 1200 °C, and 1300 °C) for different sintering time (0.5 h, 2 h, 4 h, and 6 h). The effects of synthesis temperature and sintering time on the solubility and microstructure of Y3-xNdxFe5O12 (0 ≤ x ≤ 3.0) were evaluated. The X-ray diffraction (XRD), scanning electron microscopy (SEM) and backscattering scanning electron microscopy (EBSD) results show that single phase garnet structure can be synthesized and enhanced solubility of Nd in YIG was found at higher temperatures. The solubility of Nd in garnet is 50 mol% (x = 1.5) and 60 mol% (x = 1.8) at 1200 °C and 1300 °C, respectively. There is no significant dependence of the solubility on sintering time. The SEM analysis and Archimedes drainage test show that the relative density of Y1.2Nd1.8Fe5O12 ceramics is 88.15% and 99.94% at 0.5 h and 6 h, respectively, indicating dense YIG could be obtained with a relatively long sintering time. The results show that microwave sintering can rapidly and efficiently synthesize the YIG ceramic samples. |
| Databáze: | OpenAIRE |
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