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Lattice Parameter Behavior with Different Nd and O Concentrations in (U_(1-y)Nd_y)O_(2±x) Solid Solution

机译:(U_(1-y)Nd_y)O_(2±x)固溶体中不同Nd和O浓度的晶格参数行为

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摘要

The solid solution of (U_(1-y)FP_y)O_(2±x) has the same fluorite structure as UO_(2±x), and the lattice parameter is affected by dissolved fission product and oxygen concentrations. The relation between the lattice parameter and the concentrations of neodymium and oxygen in the fluorite structure of (U_(1-y)Nd_y)O_(2±x) was investigated using X-ray diffraction. The lattice parameter behavior in the (U_(1-y)Nd_y)O_(2±x) solid solution shows a linear change as a function of the oxygen-to-metal ratio and solubility of neodymium. The lattice parameter depends on the radii of ions forming the fluorite structure and also can be expressed by a particular rule (modified Vegard's law). The numerical analyses of the lattice parameters for the stoichi-ometric and nonstoichiometric solid solutions were conducted, and the lattice parameter model for the (U_(1-y)Nd_y)O_(2±x) solid solution was assessed. A very linear relationship between the lattice parameter and the Nd and O concentration for the stoichiometry and nonstoichiometry of the (U_(1-y)Nd_y)O_(2±x) solid solution was verified.
机译:(U_(1-y)FP_y)O_(2±x)的固溶体具有与UO_(2±x)相同的萤石结构,晶格参数受溶解裂变产物和氧浓度的影响。利用X射线衍射研究了(U_(1-y)Nd_y)O_(2±x)的萤石结构中晶格参数与钕和氧浓度的关系。 (U_(1-y)Nd_y)O_(2±x)固溶体中的晶格参数行为显示出线性变化,该变化是氧金属比和钕溶解度的函数。晶格参数取决于形成萤石结构的离子的半径,并且也可以由特定规则(修正的维加德定律)表示。对化学计量和非化学计量固溶体的晶格参数进行了数值分析,并评估了(U_(1-y)Nd_y)O_(2±x)固溶体的晶格参数模型。验证了(U_(1-y)Nd_y)O_(2±x)固溶体的化学计量和非化学计量的晶格参数与Nd和O浓度之间非常线性的关系。

著录项

  • 来源
    《Nuclear Technology》 |2016年第2期|287-296|共10页
  • 作者单位

    University of South Carolina, 300 Main Street, Columbia, South Carolina 29208;

    University of South Carolina, 300 Main Street, Columbia, South Carolina 29208;

    Los Alamos National Laboratory, Los Alamos, New Mexico 87545;

    Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);美国《生物学医学文摘》(MEDLINE);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    Lattice parameter; solid solution; solubility;

    机译:格子参数;实在的方法;溶解度;

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