NDLI: Effect of Al$_{2}$O$_{3}$ concentration on zirconolite (Ca(Zr,Hf)Ti$_{2}$O$_{7}$) crystallization in (TiO$_{2}$,ZrO$_{2}$,HfO$_{2}$)-rich SiO$_{2}$–Al$_{2}$O$_{3}$–CaO–Na$

Content Provider	Springer Nature Link
Author	Caurant, Daniel Loiseau, Pascal Bardez, Isabelle Gervais, Christel
Copyright Year	2007
Abstract	Glass-ceramic matrices containing zirconolite (nominally Ca(Zr,Hf)Ti$_{2}$O$_{7}$) crystals in their bulk that would incorporate high proportions of minor actinides (Np, Am, Cm) or plutonium could be envisaged for their immobilization. Zirconolite-based glass-ceramics can be prepared by controlled crystallization of zirconolite in glasses belonging to SiO$_{2}$–Al$_{2}$O$_{3}$–CaO–Na$_{2}$O–TiO$_{2}$–ZrO$_{2}$–HfO$_{2}$ system. In this study, neodymium was used as trivalent actinides surrogate. Increasing Al$_{2}$O$_{3}$ concentration in glass composition had a strong effect on the nucleation rate I $_{z}$ of zirconolite crystals in the bulk, on the amount of neodymium incorporated in zirconolite phase and on the crystal growth rate of silicate phases (titanite + anorthite) from glass surface. These results could be explained by the existence of competition—in favor of aluminum—between Al$^{3+}$ and (Ti$^{4+}$, Zr$^{4+}$, Hf$^{4+}$) ions for their association with charge compensators cations to facilitate their incorporation in the glassy network. Differential thermal analysis (DTA) was used to study exothermal effects associated with bulk and surface crystallization. $^{27}$Al magic angle spinning nuclear magnetic resonance (MAS NMR) spectra showed that aluminum enters glasses network predominantly in 4-fold coordination. Neodymium optical absorption and fluorescence spectroscopies showed that the Al$_{2}$O$_{3}$ concentration changes performed in this study had not significant effect on Nd$^{3+}$ ions environment in glasses.
Starting Page	8558
Ending Page	8570
Page Count	13
File Format	PDF
ISSN	00222461
Journal	Journal of Materials Science
Volume Number	42
Issue Number	20
e-ISSN	15734803
Language	English
Publisher	Springer US
Publisher Date	2007-07-09
Publisher Place	Boston
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Mechanics Crystallography Continuum Mechanics and Mechanics of Materials Polymer Sciences Characterization and Evaluation of Materials Materials Science
Content Type	Text
Resource Type	Article
Subject	Ceramics and Composites Mechanics of Materials Mechanical Engineering Polymers and Plastics

Sl.	Authority	Responsibilities	Communication Details
1	Ministry of Education (GoI), Department of Higher Education	Sanctioning Authority	https://www.education.gov.in/ict-initiatives
2	Indian Institute of Technology Kharagpur	Host Institute of the Project: The host institute of the project is responsible for providing infrastructure support and hosting the project	https://www.iitkgp.ac.in
3	National Digital Library of India Office, Indian Institute of Technology Kharagpur	The administrative and infrastructural headquarters of the project	Dr. B. Sutradhar bsutra@ndl.gov.in
4	Project PI / Joint PI	Principal Investigator and Joint Principal Investigators of the project	Dr. B. Sutradhar bsutra@ndl.gov.in Prof. Saswat Chakrabarti will be added soon
5	Website/Portal (Helpdesk)	Queries regarding NDLI and its services	support@ndl.gov.in
6	Contents and Copyright Issues	Queries related to content curation and copyright issues	content@ndl.gov.in
7	National Digital Library of India Club (NDLI Club)	Queries related to NDLI Club formation, support, user awareness program, seminar/symposium, collaboration, social media, promotion, and outreach	clubsupport@ndl.gov.in
8	Digital Preservation Centre (DPC)	Assistance with digitizing and archiving copyright-free printed books	dpc@ndl.gov.in
9	IDR Setup or Support	Queries related to establishment and support of Institutional Digital Repository (IDR) and IDR workshops	idr@ndl.gov.in

Crystallization of CaHf$_{1−x }$Zr$_{ x }$Ti$_{2}$O$_{7}$ (0 ≤ x ≤ 1) zirconolite in SiO$_{2}$–Al$_{2}$O$_{3}$–CaO–Na$_{2}$O–TiO$_{2}$–HfO$_{2}$–ZrO$_{2}$–Nd$_{2}$O$_{3}$ glasses

Crystallization study of (TiO$_{2}$, ZrO$_{2}$)-rich SiO$_{2}$-Al$_{2}$O$_{3}$-CaO glasses Part I Preparation and characterization of zirconolite-based glass-ceramics

Crystallization study of (TiO$_{2}$, ZrO$_{2}$)-rich SiO$_{2}$-Al$_{2}$O$_{3}$-CaO glasses Part II Surface and internal crystallization processes investigated by differential thermal analysis (DTA)

Influence of ZrO$_{2}$ on sintering and crystallization of CaO-Al$_{2}$O$_{3}$-SiO$_{2}$ glass-ceramics

Characterisation of Ga$_{2}$O$_{3}$–Na$_{2}$O–CaO–ZnO–SiO$_{2}$ bioactive glasses

Fabrication and characterization of ZrO$_{2}$–CaO–P$_{2}$O$_{5}$–Na$_{2}$O–SiO$_{2}$ bioactive glass ceramics

Effect of Y$_{2}$O$_{3}$ on the crystallization behavior of SiO$_{2}$–MgO–B$_{2}$O$_{3}$–Al$_{2}$O$_{3}$ glasses

Dielectric properties and microstructure of TiO$_{2}$ modified (ZnMg)TiO$_{3}$ microwave ceramics with CaO–B$_{2}$O$_{3}$–SiO$_{2}$

Crystallization and microstructural evolution of MgO–Al$_{2}$O$_{3}$–SiO$_{2}$–TiO$_{2}$–La$_{2}$O$_{3}$ glass-ceramics

Effect of Al$_{2}$O$_{3}$ concentration on zirconolite (Ca(Zr,Hf)Ti$_{2}$O$_{7}$) crystallization in (TiO$_{2}$,ZrO$_{2}$,HfO$_{2}$)-rich SiO$_{2}$–Al$_{2}$O$_{3}$–CaO–Na$_{2}$O glasses

Similar Documents

Crystallization of CaHf$_{1−x }$Zr$_{ x }$Ti$_{2}$O$_{7}$ (0 ≤ x ≤ 1) zirconolite in SiO$_{2}$–Al$_{2}$O$_{3}$–CaO–Na$_{2}$O–TiO$_{2}$–HfO$_{2}$–ZrO$_{2}$–Nd$_{2}$O$_{3}$ glasses

Crystallization study of (TiO$_{2}$, ZrO$_{2}$)-rich SiO$_{2}$-Al$_{2}$O$_{3}$-CaO glasses Part I Preparation and characterization of zirconolite-based glass-ceramics

Crystallization study of (TiO$_{2}$, ZrO$_{2}$)-rich SiO$_{2}$-Al$_{2}$O$_{3}$-CaO glasses Part II Surface and internal crystallization processes investigated by differential thermal analysis (DTA)

Influence of ZrO$_{2}$ on sintering and crystallization of CaO-Al$_{2}$O$_{3}$-SiO$_{2}$ glass-ceramics

Characterisation of Ga$_{2}$O$_{3}$–Na$_{2}$O–CaO–ZnO–SiO$_{2}$ bioactive glasses

Fabrication and characterization of ZrO$_{2}$–CaO–P$_{2}$O$_{5}$–Na$_{2}$O–SiO$_{2}$ bioactive glass ceramics

Effect of Y$_{2}$O$_{3}$ on the crystallization behavior of SiO$_{2}$–MgO–B$_{2}$O$_{3}$–Al$_{2}$O$_{3}$ glasses

Dielectric properties and microstructure of TiO$_{2}$ modified (ZnMg)TiO$_{3}$ microwave ceramics with CaO–B$_{2}$O$_{3}$–SiO$_{2}$

Crystallization and microstructural evolution of MgO–Al$_{2}$O$_{3}$–SiO$_{2}$–TiO$_{2}$–La$_{2}$O$_{3}$ glass-ceramics

Effect of Al$_{2}$O$_{3}$ concentration on zirconolite (Ca(Zr,Hf)Ti$_{2}$O$_{7}$) crystallization in (TiO$_{2}$,ZrO$_{2}$,HfO$_{2}$)-rich SiO$_{2}$–Al$_{2}$O$_{3}$–CaO–Na$_{2}$O glasses