Background: 90Zr is a decay product of 90Sr

which may induce structural changes of radioactive waster forms. Purpose: In order to study the influence of decay product on the stability of perovskite-type SrTiO3 used for immobilizing 90Zr

C4H6O4Sr?0.5H2O

TiO2 and ZrOCl2?8H2O are used as the starting materials. Methods: The Zr-doped SrTiO3 synthesized can be generally represented as SrZrxTi1?xO3 (0≤x<1) with the high temperature solid reaction. The phases

structure and microcosmic shape of synthetic condensates were characterized by the X-ray Diffraction (XRD)

Scanning Electron Microscope (SEM) and Fourier Transform Infrared (FT-IR)

and long-term chemical stability was studied at constant temperature of 90 oC. Results: The results indicate that the second phase of compounds is observed when the value of x is more than 0.5. The leaching rate of Sr2+ and Zr4+ in waste forms increase with the immersion time

while the highest leaching ratios for 42 d are no more than 0.0065 ?g?mL?1 and 0.01?g?mL?1

respectively. The crystalline phase and morphology of solidified SrZrxTi1?xO3 waste form are influenced by electron beam irradiation. Conclusion: This study results may provide technical support for long-time immobilization of the 90Sr. Abstract