Crystal structure design and chemical stability of radionuclides immobilized on high-entropy garnet ceramics

Zhang, Shengtai; Li, Wenhao; Ge, Yong; Liao, Yiliao; Zhang, Haibin; Duan, Tao

doi:10.1016/j.ceramint.2023.08.177

Ceramics International

2023

DOI: 10.1016/j.ceramint.2023.08.177

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Crystal structure design and chemical stability of radionuclides immobilized on high-entropy garnet ceramics

Shengtai Zhang,

Wenhao Li,

Yong Ge

et al.

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2024

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Cited by 2 publications

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Mössbauer and magnetization measurements of multicomponent iron garnets

Cieslak,

Reissner,

Dabrowa

2024

Journal of Magnetism and Magnetic Materials

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Mössbauer and magnetization measurements of multicomponent iron garnets

Cieslak,

Reissner,

Dabrowa

2024

Journal of Magnetism and Magnetic Materials

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Chemical stability and leaching mechanism of YIG and HEG at different pH conditions

Zhang,

Teng,

et al. 2024

J Am Ceram Soc.

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Designing waste forms using the cocktail effect of high‐entropy ceramics can improve the efficiency of ceramic waste forms. In this work, traditional garnet (Y1.2Nd1.8Fe5O12, YIG) and high‐entropy (HE) garnet (Y0.6Gd0.6Sm0.6Eu0.6Dy0.6Fe5O12, HEG) are synthesized through ignition and plasma sintering to form dense ceramic waste forms. The chemical stability of YIG and HEG was studied by using static leaching tests at pH = 3, 5, 7, 9, 11. The results indicate that acidic environments can increase the leaching rate of ceramics. Leaching behavior leads to a decrease in lattice volume, but the elements remain uniformly distributed. The leaching mechanism indicates that YIG and HEG are controlled by dissolution and surface effect in the early stage (1–7 days) of leaching. The leaching mechanism in the later stage (14–42 days) is characterized by diffusion control. The diffusion coefficient of long‐term leaching indicates that HEG is more suitable as the immobilization substrate for high‐level radioactive waste (HLW) than YIG.

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Crystal structure design and chemical stability of radionuclides immobilized on high-entropy garnet ceramics

Cited by 2 publications

References 55 publications

Mössbauer and magnetization measurements of multicomponent iron garnets

Mössbauer and magnetization measurements of multicomponent iron garnets

Chemical stability and leaching mechanism of YIG and HEG at different pH conditions

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