It was noted that, in these ceramics, proton conductance was hampered by

microstructural defects that acted as barriers to hydrogen diffusion. Respective

contributions of bulk and grain boundaries to the overall conductivity was usually

found via impedance measurements but further information on hydrogen transport

could be obtained using nuclear micro-analysis based upon the use of MeV lightion

micro-beams. A contribution of ion-beam micro-analysis to the study of

hydrogen transport in BaCe0.9Y0.1O3 was reported. ERDA hydrogen profiling,

performed on partially hydrated samples at 200 and 500C, revealed concentration

gradients from which the diffusion coefficients could be derived with the help of a

simple Fickian diffusion model.

Hydrogen Diffusion in High Temperature Proton Conducting Ceramics. S.Sorieul,

S.Miro, M.Taillades-Jacquin, J.Dailly, F.Mauvy, M.H.Berger, P.Berger: Nuclear

Instruments and Methods in Physics Research B, 2008, 266[8], 1430-3