Synthesis and radiation tolerance of Lu2−Ce Ti2O7 pyrochlores
Source abstract
Abstract
Abstract As a nonradioactive surrogate for Pu, Ce is selected to study the solubility and radiation tolerance in pyrochlore matrixes. In this paper, we synthesized a series of Lu 2− x Ce x Ti 2 O 7 ( x = 0–0.7) samples. X-ray diffraction, X-ray photoelectron spectroscopy and Raman spectroscopy were used to study the structure of Lu 2− x Ce x Ti 2 O 7 ( x = 0–0.7) with different Ce 3+ content x. The results show that the maximum solubility of Ce 3+ in Lu 2 Ti 2 O 7 is 32 mol%. In order to study the radiation tolerance of these compounds, 400 keV Ne 2+ was used to perform the irradiation experiments. The grazing incident X-ray diffraction patterns revealed that the radiation tolerance of the Lu 2− x Ce x Ti 2 O 7 decreases with increasing Ce-content. This correlation between radiation tolerance and Ce-content was interpreted in terms of the antisite defect formation energies of Lu 2− x Ce x Ti 2 O 7 ( x = 0, 0.5, 1) based on the density functional theory.
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Research context
OpenAlex topics: Nuclear materials and radiation effects · Nuclear Materials and Properties · Radioactive element chemistry and processing
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