Mass transfer in polycrystalline ytterbium monosilicate under oxygen potential gradients at high temperatures
| Autor: | Tsuneaki Matsudaira, Daisaku Yokoe, Masashi Wada, Satoshi Kitaoka, Naoki Kawashima, Miyuki Takeuchi, Masasuke Takata, Takeharu Kato |
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| Rok vydání: | 2021 |
| Předmět: |
010302 applied physics
Ytterbium Materials science Analytical chemistry Oxide chemistry.chemical_element 02 engineering and technology Permeation 021001 nanoscience & nanotechnology 01 natural sciences Oxygen Ion chemistry.chemical_compound chemistry Mass transfer 0103 physical sciences Materials Chemistry Ceramics and Composites Grain boundary diffusion coefficient Grain boundary 0210 nano-technology |
| Zdroj: | Journal of the European Ceramic Society. 41:3150-3160 |
| ISSN: | 0955-2219 |
| Popis: | Mass transfer in polycrystalline Yb2SiO5 wafers with precise composition control was evaluated and analyzed by oxygen permeation experiments at high temperatures using an oxygen tracer. Oxygen permeation proceeded due to mutual grain boundary diffusion of oxide ions and Yb ions without synergistic effects such as acceleration or suppression. The oxygen shielding properties of Yb2SiO5 were compared with those of the other line compounds such as Yb2Si2O7 and Al2O3 based on the determined mass transfer parameters. It was found that the more preferentially an oxide ion diffuses in the grain boundary compared to the interior of the grain, the greater the effect of suppressing the movement of the oxide ion by applying an oxygen potential gradient becomes. |
| Databáze: | OpenAIRE |
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