Published April 2019 | Version v1
Journal article Metadata-only

Study on the phase separation behavior of (U,Nd)3O8 powder by high temperature oxidation

Creators

  • 1. University of Chinese Academy of Sciences, Beijing (China). School of Nuclear Science and Technology
  • 2. Chinese Academy of Sciences, Lanzhou (China). Institute of Modern Physics
  • 3. Lanzhou University, Lanzhou (China). School of Nuclear Science and Technology

Description

Several samples of (U1-xNdx)3O8 with different Nd content were prepared by different process. After high temperature oxidation, the final oxidized products were found to be a mixture of small particles Nd-rich (U1-yNdy)O2+v phases and large particles Nd-poor (U1-zNdz)3O8-w phases by XRD and SEM analysis. This study indicated that (U1-xNdx)3O8 powder formed a solid solution firstly at 1100 °C or high. The recrystallization of this solid solution happened and the RE-rich fluorite phase formed concurrently when the temperature began to decrease. The present work will provide more information to understand the oxidation behavior of rare-earth doped U3O8 phase at high temperature. (author)

Additional details

Publishing Information

Journal Title
Journal of Radioanalytical and Nuclear Chemistry
Journal Volume
320
Journal Issue
1
Journal Page Range
p. 235-243
ISSN
0236-5731
CODEN
JRNCDM

INIS

Country of Publication
Hungary
Country of Input or Organization
Hungary
INIS RN
50045706
Subject category
S37: INORGANIC, ORGANIC, PHYSICAL AND ANALYTICAL CHEMISTRY;
Descriptors DEI
CRYSTALLIZATION; FLUORITE; NEODYMIUM; OXIDATION; PHASE TRANSFORMATIONS; RARE EARTH COMPOUNDS; SCANNING ELECTRON MICROSCOPY; TEMPERATURE RANGE 0400-1000 K; URANIUM; URANIUM COMPOUNDS; X-RAY DIFFRACTION
Descriptors DEC
ACTINIDE COMPOUNDS; ACTINIDES; CHEMICAL REACTIONS; COHERENT SCATTERING; DIFFRACTION; ELECTRON MICROSCOPY; ELEMENTS; HALIDE MINERALS; METALS; MICROSCOPY; MINERALS; PHASE TRANSFORMATIONS; RARE EARTHS; SCATTERING; TEMPERATURE RANGE

Optional Information

Notes
33 refs.