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Flash sintering glass–ceramic treatment of Sr-contaminated soil waste

Guilin Wei,Xiaoyan Shu,Jiahong Wang,Shibing Zuo,Kuan Wu,Guoliang Zhao,Fen Luo,Wenhong Han,Chen Xu,Xirui Lu

Effective disposal of radioactive waste is crucial for safe development of nuclear energy. In this study, flash sintering technology is used for the first time to quickly solidify simulated Sr-contaminated soil waste. The waste can be converted into a glass–ceramic phase by heating the waste at 1100 °C for 1 min during flash sintering. The phase evolution during flash sintering as a function of density and amorphous fraction was systematically investigated. Additionally, the microstructural evolution of the matrices and the leaching behavior of simulated waste elements (e.g., Sr) were evaluated. This study explores the feasibility of using flash sintering for treating radioactive contamination waste.