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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

TitleCombined Quantitative X-ray Diffraction, Scanning Electron Microscopy, and Transmission Electron Microscopy Investigations of Crystal Evolution in CaO–Al2O3–SiO2–TiO2–ZrO2–Nd2O3–Na2O System
Authors
Issue Date2017
PublisherAmerican 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?
AbstractGlass-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 Identifierhttp://hdl.handle.net/10722/243045
ISSN
2023 Impact Factor: 3.2
2023 SCImago Journal Rankings: 0.649
ISI Accession Number ID

 

DC FieldValueLanguage
dc.contributor.authorLiao, C-
dc.contributor.authorLiu, C-
dc.contributor.authorLee, P.H.-
dc.contributor.authorStennett, M. C.-
dc.contributor.authorHyatt, N.C.-
dc.contributor.authorShih, K-
dc.date.accessioned2017-08-25T02:49:10Z-
dc.date.available2017-08-25T02:49:10Z-
dc.date.issued2017-
dc.identifier.citationCrystal Growth & Design, 2017, v. 17 n. 3, p. 1079-1087-
dc.identifier.issn1528-7483-
dc.identifier.urihttp://hdl.handle.net/10722/243045-
dc.description.abstractGlass-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.languageeng-
dc.publisherAmerican Chemical Society. The Journal's web site is located at http://pubs.acs.org/crystal-
dc.relation.ispartofCrystal Growth & Design-
dc.rightsCopyright © 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.titleCombined 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.typeArticle-
dc.identifier.emailLiao, C: liaocz29@connect.hku.hk-
dc.identifier.emailShih, K: kshih@hku.hk-
dc.identifier.authorityShih, K=rp00167-
dc.description.naturepublished_or_final_version-
dc.identifier.doi10.1021/acs.cgd.6b01458-
dc.identifier.scopuseid_2-s2.0-85014353818-
dc.identifier.hkuros274823-
dc.identifier.volume17-
dc.identifier.issue3-
dc.identifier.spage1079-
dc.identifier.epage1087-
dc.identifier.isiWOS:000395493900019-
dc.publisher.placeUnited States-
dc.identifier.issnl1528-7483-

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