添加剂对 UO_2烧结动力学的影响

Effects of Additives on Sintering Kinetics of UO_2

本文求出了含 Nb_2O_5、Cr_2O_3和 Gd_2O_3的三种掺杂 UO_2芯块的晶粒生长方程和晶界移动激活能。激活能大小相应为1.88×10~5,2.01×10~5和2.59×10~5J/mol.讨论了添加剂对 UO_2燃料芯块烧结动力学以及晶粒长大动力学的影响。

The effects of three kinds of additives,such as Nb_2O_5,Cr_2O_3and Gd_2O_3,on the sintering kinetics are investigated and thegrain growth kinetics of UO_2 fuel pellets are given.The grainboundary migration activation energies of three doped pelletsare 1.88×10~5,2.91×10~5 and 2.59×10~5 J/mol respectivity.