Oxygen self-diffusion and conduction mechanisms of thoria
Abstract The self-diffusion coefficients of oxygen ion in single-crystal thoria have been measured in O 2 and CO 2 atmospheres by means of a gas-solid isotope exchange technique. The coefficient determined in CO 2 was close to the intrinsic self-diffusion coefficient determined in an oxygen atmosphere, indicating it is independent of the oxygen partial pressure. On the basis of the results the electrical conduction mechanism for thoria is discussed.