In this study, strontium (Sr) contaminated zeolite was sintered at 1500 °C for 1 h, and the radionuclide was fixed into the glass matrix. The phase evolution, microstructure, morphology, mechanical property, and chemical durability were investigated. The results exhibited that the solid solubility limit of the glass solidified body could reach up to 72 wt%. Compared with other solidified forms of radioactive wastes, the glass matrix synthesized in this study has good mechanical properties and chemical durability. Therefore, high-temperature sintering is a potential method for disposing of the radioactively contaminated zeolite waste. [ABSTRACT FROM AUTHOR]