|
Title
|
|
|
|
Synthesis and characterisation of lanthanide-based dioxide
|
|
|
Author
|
|
|
|
|
|
|
Abstract
|
|
|
|
| In the present work, the microstructure and structure of La(0.25)Ce(0.52)Nd(0.17)Pr(0.06)(OH)(3) and La(0.25)Ce(0.52)Nd(0.17)Pr(0.06)O(2) is obtained from transmission electron microscopy and X-ray diffraction measurements. Space group P6(3)/m is assigned to the structure of La(0.25)Ce(0.52)Nd(0.17)Pr(0.06)(OH)(3). Lanthanides are assigned to Wyckoff positions 2c. Cell parameters are a=6.375(5) angstrom and c=3.753(5) angstrom. The thermal decomposition of this compound was studied by differential scanning calorimetry. The process is exothermal with an enthalpy change Delta H degrees value of -254 +/- 10 kJ mol(-1). The decomposition kinetics is complex and two global processes with E(a) values of 98 +/- 4 and 61 +/- 2 kJ mol 21 were observed. The product is a lanthanide dioxide. Space group Fm3m is assigned to the La(0.25)Ce(0.52)Nd(0.17)Pr(0.06)O(2). Lanthanides are distributed in Wyckoff positions 4a. The cell parameter is a=5.479(5) angstrom. Nanopores in the oxide surface are obtained using this method and characterised by STEM measurements. |
|
|
|
Language
|
|
|
|
English
|
|
|
Source (journal)
|
|
|
|
Advances in applied ceramics. - Leeds
|
|
|
Publication
|
|
|
|
Leeds
:
2011
|
|
|
ISSN
|
|
|
|
1743-6753
|
|
|
Volume/pages
|
|
|
|
110
:4
(2011)
, p. 219-224
|
|
|
ISI
|
|
|
|
000291206700006
|
|
|
Full text (Publisher's DOI)
|
|
|
|
|
|