Perovskite synroc samples containing high level radioactive waste (HLW) ~(90)Sr were synthesized by double self-propagating high-temperature synthesis (SHS) and their properties, including leach rate, density, microhardness and the maximum content of high level radioactive waste in the samples, were tested by X-ray diffraction, scanning electron microscope and PCT powder immersion analysis. The results indicate that the high density Sr~(2+)-CaTiO_3 composite are formed, and leaching rates are less than 0.1 g/(m~2·d), and the maximum SrO content in the composite can reach 36% in mass. It can be concluded that the perovskite synroc is a perfect material to immobilize HLW.%采用二次自蔓延高温合成(SHS)技术制备钙钛矿固化高放废物90Sr,通过XRD, SEM和PCT粉末浸泡法,研究了钙钛矿固化体的微观组织、浸出率以及其对高放废物~(90)Sr的最大包容量.结果表明,固化体样品密度高、孔隙率小,浸出率都小于0.1 g/(m~2·d),对SrO的包容量可达36%(质量分数);表明自蔓延高温合成的钙钛矿人造岩石固化体化学稳定性好、包容量大,是固化高放废物的理想固化体.
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