The Impact of Crystal Growth Temperature on Zr Reach Crystalline Phase Formation in a Nuclear Waste Confinement Glass Ceramic | Chapter 2 | Newest Updates in Physical Science Research Vol. 9

 To contain radioactive waste, a variety of glass ceramics could be employed. Glasses containing radiation-resistant ceramics like zirconolites, pyrochlores, or pyroxenes are an example. The influence of crystal growth temperature on the development of the following phases in a nuclear glass ceramic system is investigated in this study: Al2O3-SiO2-CaO-MgO-ZrO2-TiO2. The materials with six ZrO2 concentrations ranging from 1.00 to 6.40 m. percent are made using a discontinuous process that involves a double melting at 1,350°C, followed by nucleation at 564°C and crystal growth treatments at 900, 100, and 1,100°C. The overall morphology of the materials exhibits a glassy appearance with an opaque appearance. From the bulk to the surface, a separate crystallisation process may be visible. X-ray diffraction (XRD) study of glass ceramics reveals that, depending on the ZrO2 content of the materials and the crystal-growth temperature, the principal recognised crystalline skeletons are 2M-zirconolite, CaZrTi2O7, and ZrO2. Because of the intricacy of the oxide combination, the material with the middle ZrO2 concentration (4.5 m. percent) and crystallised at the middle Tc (1,010°C) has the most zirconolite (87 percent), doped with either lanthanides or alcalin-earth elements. In terms of 2M-zirconolite production, a temperature of 1,010°C appears to be more selective.

Author (s) Details

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.

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