Self-Propagating Synthesis and Characterization Studies of Gd-Bearing Hf-Zirconolite Ceramic Waste Forms
Self-Propagating Synthesis and Characterization Studies of Gd-Bearing Hf-Zirconolite Ceramic Waste Forms
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含钆铪锆石陶瓷废料的自蔓延合成及表征研究
DOI：
10.3390/ma12010178
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发表时间：
2019-01
期刊：
影响因子：
3.4
通讯作者：
Zhang Haibin
中科院分区：
文献类型：
--
作者：
Zhang Kuibao;Yin Dan;Xu Kai;Zhang Haibin
Synroc被公认为核废料处置的第二代废料基质。锆石是最耐用的人造岩矿物之一。在本研究中，我们选择Gd和Hf作为三价和四价榄系核素的替代物。以CuO为氧化剂，采用自蔓延技术快速合成了含Gd的Hf-锆石(Ca1−xHf1−xGd2xTi2O7)陶瓷废料。结果表明，Gd可以同时取代Ca和Hf位。然而，当x>0.8时，Gd2O3不能完全融入到锆石的晶格结构中。测试了Gd-Hf共掺杂样品(Hf-Gd-0.6)的耐水性，测得钙、铜、Gd和Hf的42d归一化浸出率分别为1.5 7、0.13、4.72×10−7和1.5 9×10−8g·m−2·d−1。
Synroc is recognized as the second-generation waste matrice for nuclear waste disposal. Zirconolite is one of the most durable Synroc minerals. In this study, Gd and Hf were selected as the surrogates of trivalent and tetravalent actinide nuclides. Gd-bearing Hf-zirconolite (Ca1−xHf1−xGd2xTi2O7) ceramic waste forms were rapidly synthesized from a self-propagating technique using CuO as the oxidant. The results indicate that Gd can concurrently replace the Ca and Hf sites. However, Gd2O3 could not completely be incorporated into the lattice structure of zirconolite when the x value is higher than 0.8. The aqueous durability of selected Gd-Hf codoped sample (Hf-Gd-0.6) was tested, where the 42 days normalized leaching rates (LRi) of Ca, Cu, Gd and Hf are measured to be 1.57, 0.13, 4.72 × 10−7 and 1.59 × 10−8 g·m−2·d−1.
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影响因子：
3.1
作者：
Caurant, D.;Majerus, O.;Dussossoy, J. L.
通讯作者：
Dussossoy, J. L.
影响因子：
4.5
作者：
Pascal Loiseau;D. Caurant;O. Majérus;N. Baffier;C. Fillet
通讯作者：
Pascal Loiseau;D. Caurant;O. Majérus;N. Baffier;C. Fillet
影响因子：
3.1
作者：
Loiseau, P;Caurant, D;Fillet, C
通讯作者：
Fillet, C
影响因子：
3.3
作者：
H. Rossell
通讯作者：
H. Rossell
自蔓延化学炉合成纳米晶Gd2Zr2O7陶瓷及其水耐久性
影响因子：
3.1
作者：
He, Zongsheng;Zhang, Kuibao;Zhang, Haibin
通讯作者：
Zhang, Haibin