Microwave‐specific heating of crystalline species in nuclear waste glass
| Autor: | Aaron L. Washington, Jonathan H. Christian, Kevin M. Fox |
|---|---|
| Rok vydání: | 2016 |
| Předmět: |
Diffraction
geography geography.geographical_feature_category Materials science Spinel Radioactive waste 02 engineering and technology engineering.material 010402 general chemistry 021001 nanoscience & nanotechnology 01 natural sciences Trevorite 0104 chemical sciences Crystal Chemical engineering engineering General Materials Science Irradiation Monolith 0210 nano-technology Microwave |
| Zdroj: | International Journal of Applied Glass Science. 8:158-164 |
| ISSN: | 2041-1294 2041-1286 |
| Popis: | The microwave heating of a crystal-free and a partially trevorite-crystallized nuclear waste glass simulant was evaluated. Our results show that a 500-mg monolith of partially crystallized waste glass can be heated from room temperature to above 1600°C within 2 min using a single-mode, highly focused, 2.45 GHz microwave, operating at 300 W. Using X-ray diffraction measurements, we show that trevorite is no longer detectable after irradiation and thermal quenching. When a crystal-free analog of the same waste glass simulant composition was exposed to the same microwave radiation, it could not be heated above 450°C regardless of the heating time. The reduction in crystalline content achieved by selectively heating spinels in the presence of glass suggests that microwave-specific heating should be further explored as a technique for remediating crystal accumulation in a glass melt. |
| Databáze: | OpenAIRE |
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