Publication Date:
2018-02-11
Description:
The dissolution enthalpy, Δ H DS , and the formation enthalpy, ΔH f,ox , of bulk lutetium doped cerium oxide (LuDC) were studied at 701 °C in molten sodium molybdate. For the composition range of Ce 1- X Lu X O 2-x/2 , studied 0 ≤ X ≤ 0.3, the Δ H DS decreases linearly and smoothly with lutetium content according to Δ H DS ,kJmol −1 =73.5(1.0)-165.1(5.5)·x). The enthalpy of formation, ΔH f,ox , becomes more exothermic linearly with lutetium content. No anomaly in ΔH f,ox is observed at low Lu 2 O 3 concentration as reported previously for several other rare earth doped ceria systems, suggesting possible differences in clustering and microstructure, which may also be related to difference in processing conditions. This article is protected by copyright. All rights reserved.
Print ISSN:
0002-7820
Electronic ISSN:
1551-2916
Topics:
Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
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