Neutron scattering characterization of pure and rare-earth modified zirconia211 catalysis

摘要

The combined application of neutron powder diffraction, small angle neutron211u001escattering and neutron inelastic scattering has led to improved understanding of 211u001ethe crystal phases, defect structure, microstructure and hydroxyl/water dynamics 211u001ein pure and lanthanide-modified zirconia catalysts. Powder diffraction 211u001eexperiments quantified the degree of stabilization and provided evidence for 211u001estatic, oxygen vacancy-induced atomic displacements in stabilized zirconia. 211u001eQuantitative assessment of Bragg peak breadths led to measurements 'grain size' 211u001erepresenting coherency length of long-range ordered atomic arrangements 211u001e(crystals). Small angle neutron scattering provided a separate measurement of 211u001e'grain size' representing the average size of the primary particles in the