Chemomechanical properties and microstructural stability of nanocrystalline Pr-doped ceria: An in situ X-ray diffraction investigation

Chemomechanics of ionically conductive ceramics for electrical energy conversion and storage

“…[128]. Chemical expansion was also observed in powders of PCO by in situ X-ray diffraction [28]. The kinetics of this expansion, including the chemical surface exchange coefficient, were measured in situ for thin films of PCO by high temperature XRD and optical absorption, and for bulk samples by dilatometry, for which the diffusivity was also measured [129].…”

“…Such information is essential to understanding the kinetics of oxygen reduction near heterointerfaces, and can be applied to materials beyond oxides for SOFCs. High temperature X-ray diffraction can be used to study the long-range order, lattice parameter, crystallite size, and microstrain in materials and therefore track temperaturedependent expansion and resulting strains within materials with different compositions, as was reported by Kuru et al for PCO [28]. Using thin film electrodes, quantitative measurements of film stresses have also been made via laser deflection methods for LiMn 2 O 4 [29], LiCoO 2 [30], and for composite graphite negative electrodes in LIBs [31] .…”

Effect of Pr doping on catalytic properties of oxide ion conductor, Zr–Nd–O, for soot oxidation

“…5illustrates temperature dependence of lattice parameter observed by high-temperature XRD. For pure Pr 6 O 11 , change of gradient was observed approximately at 673 K; the gradient above 673 K is likely to be associated with thermal expansion correlated with valence change of Pr ions[11]. However, lattice parameter for Zr 0.54 Nd 0.18 Pr 0.28 O x increased linearly up to 973 K, indicating valence change of incorporated Pr ion does not occur.It can be concluded from the observations under reducing and oxidizing conditions, when Pr was incorporated into Zr-Nd oxides, valence state of Pr hardly changed.…”

Investigation on synthesis, structure, morphology, spectroscopic and electrochemical studies of praseodymium-doped ceria nanoparticles by combustion method

“…Praseodymium doped ceria is considered to be one of the best ceria-based solid electrolytes [14,15]. PDC solid solutions can be synthesized by a variety of techniques such as the conventional ceramic route or chemical methods.…”