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Article: Combined Quantitative X-ray Diffraction, Scanning Electron Microscopy, and Transmission Electron Microscopy Investigations of Crystal Evolution in CaO–Al2O3–SiO2–TiO2–ZrO2–Nd2O3–Na2O System
Title | Combined Quantitative X-ray Diffraction, Scanning Electron Microscopy, and Transmission Electron Microscopy Investigations of Crystal Evolution in CaO–Al2O3–SiO2–TiO2–ZrO2–Nd2O3–Na2O System |
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Authors | |
Issue Date | 2017 |
Publisher | American Chemical Society. The Journal's web site is located at http://pubs.acs.org/crystal |
Citation | Crystal Growth & Design, 2017, v. 17 n. 3, p. 1079-1087 How to Cite? |
Abstract | Glass-ceramics, with a specific crystalline phase assembly, can combine the advantages of glass and ceramic and avoid their disadvantages. In this study, both cubic-zirconia and zirconolite-based glass-ceramics were obtained by the crystallization of SiO2–CaO–Al2O3–TiO2–ZrO2–Nd2O3–Na2O glass. Results show that all samples underwent a phase transformation from cubic-zirconia to zirconolite when crystallized at 900, 950, and 1000 °C. The size of the cubic-zirconia crystal could be controlled by temperature and dwelling time. Both cubic-zirconia and zirconolite crystals/particles show dendrite shapes, but with different dendrite branching. The dendrite cubic-zirconia showed highly oriented growth. Scanning electron microscopy images show that the branches of the cubic-zirconia crystal had a snowflake-like appearance, while those in zirconolite were composed of many individual crystals. Rietveld quantitative analysis revealed that the maximum amount of zirconolite was ∼19 wt %. A two-stage crystallization method was used to obtain different microstructures of zirconolite-based glass-ceramic. The amount of zirconolite remained approximately 19 wt %, but the individual crystals were smaller and more homogeneously dispersed in the dendrite structure than those obtained from one-stage crystallization. This process-control feature can result in different sizes and morphologies of cubic-zirconia and zirconolite crystals to facilitate the design of glass-ceramic waste forms for nuclear wastes. |
Persistent Identifier | http://hdl.handle.net/10722/243045 |
ISSN | 2023 Impact Factor: 3.2 2023 SCImago Journal Rankings: 0.649 |
ISI Accession Number ID |
DC Field | Value | Language |
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dc.contributor.author | Liao, C | - |
dc.contributor.author | Liu, C | - |
dc.contributor.author | Lee, P.H. | - |
dc.contributor.author | Stennett, M. C. | - |
dc.contributor.author | Hyatt, N.C. | - |
dc.contributor.author | Shih, K | - |
dc.date.accessioned | 2017-08-25T02:49:10Z | - |
dc.date.available | 2017-08-25T02:49:10Z | - |
dc.date.issued | 2017 | - |
dc.identifier.citation | Crystal Growth & Design, 2017, v. 17 n. 3, p. 1079-1087 | - |
dc.identifier.issn | 1528-7483 | - |
dc.identifier.uri | http://hdl.handle.net/10722/243045 | - |
dc.description.abstract | Glass-ceramics, with a specific crystalline phase assembly, can combine the advantages of glass and ceramic and avoid their disadvantages. In this study, both cubic-zirconia and zirconolite-based glass-ceramics were obtained by the crystallization of SiO2–CaO–Al2O3–TiO2–ZrO2–Nd2O3–Na2O glass. Results show that all samples underwent a phase transformation from cubic-zirconia to zirconolite when crystallized at 900, 950, and 1000 °C. The size of the cubic-zirconia crystal could be controlled by temperature and dwelling time. Both cubic-zirconia and zirconolite crystals/particles show dendrite shapes, but with different dendrite branching. The dendrite cubic-zirconia showed highly oriented growth. Scanning electron microscopy images show that the branches of the cubic-zirconia crystal had a snowflake-like appearance, while those in zirconolite were composed of many individual crystals. Rietveld quantitative analysis revealed that the maximum amount of zirconolite was ∼19 wt %. A two-stage crystallization method was used to obtain different microstructures of zirconolite-based glass-ceramic. The amount of zirconolite remained approximately 19 wt %, but the individual crystals were smaller and more homogeneously dispersed in the dendrite structure than those obtained from one-stage crystallization. This process-control feature can result in different sizes and morphologies of cubic-zirconia and zirconolite crystals to facilitate the design of glass-ceramic waste forms for nuclear wastes. | - |
dc.language | eng | - |
dc.publisher | American Chemical Society. The Journal's web site is located at http://pubs.acs.org/crystal | - |
dc.relation.ispartof | Crystal Growth & Design | - |
dc.rights | Copyright © 2017 American Chemical Society. This is an open access article published under an ACS AuthorChoice License, which permits copying and redistribution of the article or any adaptations for non-commercial purposes. | - |
dc.title | Combined Quantitative X-ray Diffraction, Scanning Electron Microscopy, and Transmission Electron Microscopy Investigations of Crystal Evolution in CaO–Al2O3–SiO2–TiO2–ZrO2–Nd2O3–Na2O System | - |
dc.type | Article | - |
dc.identifier.email | Liao, C: liaocz29@connect.hku.hk | - |
dc.identifier.email | Shih, K: kshih@hku.hk | - |
dc.identifier.authority | Shih, K=rp00167 | - |
dc.description.nature | published_or_final_version | - |
dc.identifier.doi | 10.1021/acs.cgd.6b01458 | - |
dc.identifier.scopus | eid_2-s2.0-85014353818 | - |
dc.identifier.hkuros | 274823 | - |
dc.identifier.volume | 17 | - |
dc.identifier.issue | 3 | - |
dc.identifier.spage | 1079 | - |
dc.identifier.epage | 1087 | - |
dc.identifier.isi | WOS:000395493900019 | - |
dc.publisher.place | United States | - |
dc.identifier.issnl | 1528-7483 | - |