The Impact of Crystal Growth Temperature on Zr Reach Crystalline Phase Formation in a Nuclear Waste Confinement Glass Ceramic

Authors

  • Dalila Moudir Algiers Nuclear Research Centre, Division of Nuclear Techniques, P.O.Box: 399, Alger-RP, Algiers, Algeria.
  • Nour-El-Hayet Kamel Algiers Nuclear Research Centre, Division of Nuclear Techniques, P.O.Box: 399, Alger-RP, Algiers, Algeria.
  • Abdelbaki Benmounah Research Unit on Materials, Processes and Environment (URMPE), University M’hamed Bouguerra, Avenue de l’indépendance, 35000, Boumerdès, Algeria.
  • Yasmina Mouheb Algiers Nuclear Research Centre, Division of Nuclear Techniques, P.O.Box: 399, Alger-RP, Algiers, Algeria.
  • Rafika Souag Research Unit on Materials, Processes and Environment (URMPE), University M’hamed Bouguerra, Avenue de l’indépendance, 35000, Boumerdès, Algeria.
  • Boudjmaa Bezzazi Research Unit on Materials, Processes and Environment (URMPE), University M’hamed Bouguerra, Avenue de l’indépendance, 35000, Boumerdès, Algeria.
  • Fairouz Aouchiche Algiers Nuclear Research Centre, Division of Nuclear Techniques, P.O.Box: 399, Alger-RP, Algiers, Algeria.
  • Ziane Kamel Algiers Nuclear Research Centre, Division of Nuclear Techniques, P.O.Box: 399, Alger-RP, Algiers, Algeria.
  • Soumia Kamariz Algiers Nuclear Research Centre, Division of Nuclear Techniques, P.O.Box: 399, Alger-RP, Algiers, Algeria.

DOI:

https://doi.org/10.9734/bpi/nupsr/v9/9368D

Keywords:

Glass ceramic, radioactive waste, crystallization temperature, XRD, crystalline phase

Abstract

Many glass ceramics could be used to contain radioactive waste. This is the case with glasses that contain radiation-resistant ceramics such as zirconolites, pyrochlores, or pyroxenes. This study investigates the effect of crystal growth temperature on the formation of the following phases in a nuclear glass ceramic system: Al2O3-SiO2-CaO-MgO-ZrO2-TiO2. The materials with six contents of ZrO2, ranging from 1.00 to 6.40 m.%, are synthesized by a discontinuous method, consisting in a double-melting at 1,350°C, followed by both a nucleation at 564°C, and a crystal growth treatment at: 900, 100 and 1,100°C. The morphology of the materials as a whole reveals a glassy feature with an opaque aspect. A different crystallisation process can also be seen from the bulk to the surface. The X-ray diffraction (XRD) analysis of glass ceramics reveals that the main identified crystalline skeletons are those of 2M-zirconolite, CaZrTi2O7, and ZrO2, depending on the ZrO2 content of the materials and the crystal-growth temperature. Due to the complexity of the oxide mixture, the material with the middle content in ZrO2 (4.5 m. %) and crystallised at the middle value of Tc (1,010°C) shows the greatest content in zirconolite (87%), doped with either lanthanides or alcalin-earth elements.The temperature of 1,010°C appears to be more selective in terms of 2M-zirconolite formation.

Published

2021-06-25

How to Cite

Dalila Moudir, Nour-El-Hayet Kamel, Abdelbaki Benmounah, Yasmina Mouheb, Rafika Souag, Boudjmaa Bezzazi, … Soumia Kamariz. (2021). The Impact of Crystal Growth Temperature on Zr Reach Crystalline Phase Formation in a Nuclear Waste Confinement Glass Ceramic. Newest Updates in Physical Science Research Vol. 9, 7–13. https://doi.org/10.9734/bpi/nupsr/v9/9368D

Issue

Newest Updates in Physical Science Research Vol. 9

Section

Chapters