Oxygen grain boundary diffusion in zinc oxide ceramics

O-18 diffusion coefficients were measured in some zinc oxide ceramics, using a secondary ion mass spectrometer. The results are interpreted as indicating extrinsic behavior. The values of the lattice diffusion coefficients with higher valence dopants compared with zinc ions are grainboundary diffusivity of oxide ions were also evaluated. Although the lattice diffusion coefficients varied in two orders of magnitude, the products of grainboundary width and grainboundary coefficient were less sensitive to the type of dopants.