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| Autores principales: | , , , , , , , |
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| Formato: | Preprint |
| Publicado: |
2025
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| Materias: | |
| Acceso en línea: | https://arxiv.org/abs/2509.24289 |
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| _version_ | 1866915521151107072 |
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| author | Tao, Yu Liu, Depu Zhou, Chunyin Jia, Xv Liu, Jingyi Chang, Xue Wang, Yangbin Lei, Li |
| author_facet | Tao, Yu Liu, Depu Zhou, Chunyin Jia, Xv Liu, Jingyi Chang, Xue Wang, Yangbin Lei, Li |
| contents | The investigation of high-pressure chemical reaction dynamics has long been constrained by the absence of effective in-situ characterization methods. Here we performed the state-of-the-art synchrotron radiation in-situ X-ray imaging based on large-volume press (LVP) technology to uncover the crucial information on the dynamics of the underlying phenomena of the formation of iron-based spherical product in the high-pressure solid-state metathesis reaction (HSM). We successfully give access to the entire reduction-nitridation process of ferric oxide under the reaction conditions. By analyzing the variation of image intensity (Im) with temperature, two critical stages have been revealed, the formation of nitrogen-containing molten borate Fe[BO]+N[BO] melt and the phase separation of iron nitrides from molten borate. The experimental observation provides direct evidence for the existence of nitrogen-containing molten borate under high pressure, and the formation of molten borate plays a crucial role as a transport medium for nonmetallic ion exchange with metal elements. The M[BO]+N[BO] melt (M=other metals) represents a general pathway for the synthesis of metal nitrides under high pressure. The combination of LVP high-pressure experimental technology with X-ray radioscopy has resulted in a leap in the understanding of reaction dynamics and has opened new paths in the fields of high-pressure chemistry. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2509_24289 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | In-situ X-ray imaging of reduction-nitridation in ferric oxide under high Pressure Tao, Yu Liu, Depu Zhou, Chunyin Jia, Xv Liu, Jingyi Chang, Xue Wang, Yangbin Lei, Li Chemical Physics The investigation of high-pressure chemical reaction dynamics has long been constrained by the absence of effective in-situ characterization methods. Here we performed the state-of-the-art synchrotron radiation in-situ X-ray imaging based on large-volume press (LVP) technology to uncover the crucial information on the dynamics of the underlying phenomena of the formation of iron-based spherical product in the high-pressure solid-state metathesis reaction (HSM). We successfully give access to the entire reduction-nitridation process of ferric oxide under the reaction conditions. By analyzing the variation of image intensity (Im) with temperature, two critical stages have been revealed, the formation of nitrogen-containing molten borate Fe[BO]+N[BO] melt and the phase separation of iron nitrides from molten borate. The experimental observation provides direct evidence for the existence of nitrogen-containing molten borate under high pressure, and the formation of molten borate plays a crucial role as a transport medium for nonmetallic ion exchange with metal elements. The M[BO]+N[BO] melt (M=other metals) represents a general pathway for the synthesis of metal nitrides under high pressure. The combination of LVP high-pressure experimental technology with X-ray radioscopy has resulted in a leap in the understanding of reaction dynamics and has opened new paths in the fields of high-pressure chemistry. |
| title | In-situ X-ray imaging of reduction-nitridation in ferric oxide under high Pressure |
| topic | Chemical Physics |
| url | https://arxiv.org/abs/2509.24289 |