Structure of alumina glass
Abstract The fabrication of novel oxide glass is a challenging topic in glass science. Alumina (Al2O3) glass cannot be fabricated by a conventional melt–quenching method, since Al2O3 is not a glass former. We found that amorphous Al2O3 synthesized by the electrochemical anodization of aluminum metal...
| Main Authors: | , , , , , , , |
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| Format: | Article |
| Language: | English |
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Nature Portfolio
2022-01-01
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| Series: | Scientific Reports |
| Online Access: | https://doi.org/10.1038/s41598-021-04455-6 |
| _version_ | 1819007168520650752 |
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| author | Hideki Hashimoto Yohei Onodera Shuta Tahara Shinji Kohara Koji Yazawa Hiroyo Segawa Motohiko Murakami Koji Ohara |
| author_facet | Hideki Hashimoto Yohei Onodera Shuta Tahara Shinji Kohara Koji Yazawa Hiroyo Segawa Motohiko Murakami Koji Ohara |
| author_sort | Hideki Hashimoto |
| collection | DOAJ |
| description | Abstract The fabrication of novel oxide glass is a challenging topic in glass science. Alumina (Al2O3) glass cannot be fabricated by a conventional melt–quenching method, since Al2O3 is not a glass former. We found that amorphous Al2O3 synthesized by the electrochemical anodization of aluminum metal shows a glass transition. The neutron diffraction pattern of the glass exhibits an extremely sharp diffraction peak owing to the significantly dense packing of oxygen atoms. Structural modeling based on X-ray/neutron diffraction and NMR data suggests that the average Al–O coordination number is 4.66 and confirms the formation of OAl3 triclusters associated with the large contribution of edge-sharing Al–O polyhedra. The formation of edge-sharing AlO5 and AlO6 polyhedra is completely outside of the corner-sharing tetrahedra motif in Zachariasen’s conventional glass formation concept. We show that the electrochemical anodization method leads to a new path for fabricating novel single-component oxide glasses. |
| first_indexed | 2024-12-21T00:20:17Z |
| format | Article |
| id | doaj.art-b901e1ce319046fbbeac734521822ec3 |
| institution | Directory Open Access Journal |
| issn | 2045-2322 |
| language | English |
| last_indexed | 2024-12-21T00:20:17Z |
| publishDate | 2022-01-01 |
| publisher | Nature Portfolio |
| record_format | Article |
| series | Scientific Reports |
| spelling | doaj.art-b901e1ce319046fbbeac734521822ec32022-12-21T19:22:06ZengNature PortfolioScientific Reports2045-23222022-01-011211910.1038/s41598-021-04455-6Structure of alumina glassHideki Hashimoto0Yohei Onodera1Shuta Tahara2Shinji Kohara3Koji Yazawa4Hiroyo Segawa5Motohiko Murakami6Koji Ohara7Department of Applied Chemistry, School of Advanced Engineering, Kogakuin UniversityInstitute for Integrated Radiation and Nuclear Science, Kyoto UniversityDepartment of Physics and Earth Sciences, Faculty of Science, University of the RyukyusResearch Center for Advanced Measurement and Characterization, National Institute for Materials ScienceJEOL RESONANCE Inc.Research Center for Functional Materials, National Institute for Materials ScienceDepartment of Earth Science, ETH ZürichDiffraction and Scattering Division, Japan Synchrotron Radiation Research InstituteAbstract The fabrication of novel oxide glass is a challenging topic in glass science. Alumina (Al2O3) glass cannot be fabricated by a conventional melt–quenching method, since Al2O3 is not a glass former. We found that amorphous Al2O3 synthesized by the electrochemical anodization of aluminum metal shows a glass transition. The neutron diffraction pattern of the glass exhibits an extremely sharp diffraction peak owing to the significantly dense packing of oxygen atoms. Structural modeling based on X-ray/neutron diffraction and NMR data suggests that the average Al–O coordination number is 4.66 and confirms the formation of OAl3 triclusters associated with the large contribution of edge-sharing Al–O polyhedra. The formation of edge-sharing AlO5 and AlO6 polyhedra is completely outside of the corner-sharing tetrahedra motif in Zachariasen’s conventional glass formation concept. We show that the electrochemical anodization method leads to a new path for fabricating novel single-component oxide glasses.https://doi.org/10.1038/s41598-021-04455-6 |
| spellingShingle | Hideki Hashimoto Yohei Onodera Shuta Tahara Shinji Kohara Koji Yazawa Hiroyo Segawa Motohiko Murakami Koji Ohara Structure of alumina glass Scientific Reports |
| title | Structure of alumina glass |
| title_full | Structure of alumina glass |
| title_fullStr | Structure of alumina glass |
| title_full_unstemmed | Structure of alumina glass |
| title_short | Structure of alumina glass |
| title_sort | structure of alumina glass |
| url | https://doi.org/10.1038/s41598-021-04455-6 |
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