Measurement of an electrical potential induced by normal stress applied to the interface of an ionic material at elevated temperatures

摘要: The measurement of a potential difference between two surfaces zirconia is reported, when normal stress applied to one surface, leaving the other surface free. proportional over wide range. proportionality constant represents new thermodynamic interfacial state because reversible and independent temperature. In zirconia, related volume charge on oxygen ion by considering equilibrium among electrochemical potentials at stressed unstressed interfaces. agreement with theory within 10% for specimens made polycrystalline or single crystal cubic (100) orientation. changes up 20% orientations crystal; this change attributed differences in effective different orientations. kinetics voltage response was also investigated detail; it consistent diffusion along interface formed metal electrode surface. present measurements provide first experimental confirmation fundamental relationship chemical potential, traction, atomic species interfaces crystalline materials. has implications further understanding diffusional creep, creep cavitation sintering ionic (or partially ionic) solids.