Stability studies of [CsxBay][(Al3+,Ti3+)2y+xTi4+8-2y-x]O16 ceramics for radioactive caesium immobilization
Stability studies of [CsxBay][(Al3+,Ti3+)2y+xTi4+8-2y-x]O16 ceramics for radioactive caesium immobilization
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[CsxBay][(Al3 ,Ti3 )(2y x)Ti-8-2y-x(4 )]O-16陶瓷用于放射性铯固定的稳定性研究
DOI：
10.1016/j.ceramint.2019.01.095
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发表时间：
2019
影响因子：
5.2
通讯作者：
Jiang Ma
中科院分区：
文献类型：
--
作者：
Yushan Yang;Xiaofen Wang;Shunzhong Luo;Xiaoyong Yang;Jiang Ma
合成了[CsxBay][（Al 3+，Ti 3+）2 y + xTi 4 +8- 2 y-x] O 16（0.4 ≤ x，y ≤ 0.8）陶瓷，研究了Ba 2+取代Cs+对堇青石-陶瓷废料稳定性的影响。结果表明，Ba ~（2+）对（Cs，Ba）-锰钡石体系中Cs ~+的取代不会引起晶体相和显微结构的显著变化。Cs和Ba在90 °C下在去离子水中的归一化释放速率在28天后为<0.005g m-2d-1。这些结果表明，锰钡石陶瓷是一种理想的永久性放射性铯处置基质。
[CsxBay][(Al3+,Ti3+)2y+xTi4+8-2y-x]O16 (0.4 ≤ x, y ≤ 0.8) ceramics were synthesized to investigate the substitution effects of Ba2+ for Cs+ on the stability of hollandite-ceramic waste forms. It was found that the substitution of Ba2+ for Cs+ in the (Cs,Ba)-hollandite system does not cause substantial variation in the crystallographic phase and microstructure. The normalized release rates of Cs and Ba at 90 °C in deionized water were < 0.005 g m-2 d-1 after 28 days. These results indicate that hollandite ceramics are an ideal host for permanent radioactive caesium disposal.