Synthesis and structure of Ce1−xEuxPO4 solid solutions for minor actinides immobilization
Synthesis and structure of Ce1−xEuxPO4 solid solutions for minor actinides immobilization
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DOI：
10.1016/j.jnucmat.2014.03.049
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发表时间：
2014-08
影响因子：
3.1
通讯作者：
Xiao-hua Wang;Yuancheng Teng;Yi Huang;Lang Wu;P. Zeng
中科院分区：
文献类型：
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作者：
Xiao-hua Wang;Yuancheng Teng;Yi Huang;Lang Wu;P. Zeng
以铕（Eu）为三价次锕系元素镅（Am）的替代物，采用固相反应法合成了Ce 1 − xEuxPO 4（x= 0-1）固溶体。研究了煅烧温度、保温时间和Eu含量对Ce 1 − xEuxPO 4（x= 0-1）晶相、显微结构和形貌的影响。在1000 °C下煅烧4 h后，EuPO 4和CePO 4共存，表明CePO 4和EuPO 4最初分别形成。在1300 °C下反应4 h得到了纯的单相独居石型Ce 1 − xEuxPO 4（x= 0-1）粉末。XRD图谱Rietveld精修和μ-拉曼分析的结果证实了Ce 1 − xEuxPO 4（x= 0-1）连续固溶体的形成。随着保温时间的延长，Ce0.5Eu0.5PO4的晶粒尺寸明显增大。Ce、Eu、P和O元素在Ce0.5Eu0.5PO4固溶体中分布均匀。
Ce1−xEuxPO4(x= 0–1) solid solutions were synthesized by the solid state reaction process using europium (Eu) as the surrogate for trivalent minor actinide americium (Am). The effects of calcination temperature, holding time and Eu content on the crystalline phase, microstructure and morphology of Ce1−xEuxPO4(x= 0–1) were investigated. The monazite-type EuPO4and CePO4coexisted after being calcined at 1000 °C for 4 h, suggesting the CePO4and EuPO4phases would form initially separately. Pure and single-phase monazite-type Ce1−xEuxPO4(x= 0–1) powders were obtained at 1300 °C for 4 h. The results of the XRD patterns Rietveld refinement and μ-Raman analysis confirmed the formation of a Ce1−xEuxPO4(x= 0–1) continuous solid solution. The grain size of Ce0.5Eu0.5PO4increased obviously as the holding time extended. The Ce, Eu, P and O elements were almost distributed homogeneously in the Ce0.5Eu0.5PO4solid solution.