Characterization and phase stability of pyrochlore (Nd1-xCex)2Zr2O7+y (x=0-1)

被引：16
|
作者：
Wang, Xin [1 ]
Jiang, Kuo [1 ]
Zhou, Liang [1 ]
机构：
[1] Southwest Univ Sci & Technol, Dept Def Sci & Technol, Mianyang 621010, Peoples R China
来源：
JOURNAL OF NUCLEAR MATERIALS | 2015年 / 458卷
关键词：
INERT MATRIX FUEL; ORDER-DISORDER PHENOMENA; EFFECTIVE IONIC-RADII; THERMAL-CONDUCTIVITY; ND2ZR2O7; PYROCHLORE; OXIDES; ZRO2-CEO2; TEMPERATURE; REDUCTION; BEHAVIOR;
D O I：
10.1016/j.jnucmat.2014.12.075
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
Powders of (Nd1-xCex)(2)Zr2O7+y (x = 0-1) with pyrochlore structure were prepared by sol-spray pyrolysis and subsequent graphite reduction at 1200 degrees C. The effects of cerium content on crystal structure, phase stability and microstructure of the (Nd1-xCex)(2)Zr2O7+y (x = 0-1) inert matrix materials were studied. XRD and Raman results presented that all samples were in a single pyrochlore phase. XPS results indicated the cerium was in a single oxidation state of +4. After sintering at 1500 degrees C for 24 h in air, the sample of x = 1 underwent a phase segregation to Zr1-xCexO2 solid solutions of tetragonal, metastable tetragonal and cubic phases, the sample of x = 0.9 contained a few tetragonal phase in addition to fluorite phase, the samples of x = 0.5-0.8 had a single phase fluorite structure, the samples of x = 0-0.4 maintained the pyrochlore structure. (C) 2015 Elsevier B.V. All rights reserved.
引用
收藏
页码：156 / 161
页数：6
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