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(Sr1-1.5xYx)TiO3模拟固化90Y的稳定性研究

ACTA PHYSICA SINICA(2014)

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Abstract
为了研究钙钛矿结构的SrTiO3固化Y3+(90Y的模拟物)的化学稳定性,以Sr (NO3)2, TiO2及Y2O3粉体作为原料,按照化学计量比Sr1-1.5xYxTiO3(06 x 60.12)设计配方,采用高温固相法制备一系列固化体.利用X射线衍射、扫描电镜和Raman对制备固化体的物相、结构和微观形貌进行分析表征,并对其抗浸出性能进行了研究.结果表明:当x<0.08时,固化体为单一物相,当x>0.08时,固化体中出现部分烧绿石相;固化体中的Sr2+, Y3+的浸出浓度随浸泡时间延长而增大,在浸泡42 d时, Sr2+的最大浸出浓度为0.004μg·mL-1, Y3+的最大浸出浓度为0.02μg·mL-1.
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Key words
perovskite-type,wasted leaching behavior
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